Patent
Literature
Four-step absorption of fluorine emission from the polishing of lead glass. Barton, Jan; Pajkrtova, Helena; Tomes, Pavel. Technicka Divize, Crystalex, Novy Bor, Czech Rep. Sklar a Keramik (1994), 44(7-8), 108-11. Publisher: SVUS, a.s., CODEN: SKKEAQ ISSN: 0037-637X. Journal written in Czech. CAN 122:195593 AN 1995:334484 CAPLUS (Copyright (C) 2008 ACS on SciFinder (R))
Abstract
A balance model of the absorption of F emissions from lead glass polishing is described. In the case of the 4-step absorption of F emissions, the HF concn. in the stack is .apprx.1 mg/m3 of waste gases.
Environmental protection in the glass industry - program of waste management. Barton, Jan. Vyzkumny ustav uzitkoveho skla, Crystalex, s.p., Novy Bor, Czech Rep. Sklar a Keramik (1993), 43(6-7), 137-9. CODEN: SKKEAQ ISSN: 0037-637X. Journal written in Czech. CAN 121:90734 AN 1994:490734 CAPLUS (Copyright (C) 2008 ACS on SciFinder (R))
Abstract
Problems with solid waste disposal in glass and ceramic works in connection with the new legislation on environmental protection are discussed.
Balance model of the neutralization of acid waste water from chemical polishing of glass. Barton, Jan. Res. Inst. Util. Glass, Crystalex, Novy Bor, Czech Rep. Ceramics-Silikaty (1993), 37(2), 100-4. CODEN: CERSEP ISSN: 0862-5468. Journal written in English. CAN 119:209682 AN 1993:609682 CAPLUS (Copyright (C) 2008 ACS on SciFinder (R))
Abstract
Wastewater contg. H2SO4, HF, and H2SiF6, was neutralized with an aq. suspension of tech.-grade Ca(OH)2 (milk of lime). The balance model calcs. the capacity of interoperation tanks and of neutralization reactors. Wastewater is produced by rinsing chem. polished glassware with water. The effect of the no. of interoperation rinses on the prodn. of acid wastewater and on the capacity of interoperation tanks was demonstrated. The model is suitable for small wastewater neutralizing stations whose design has till recently been a purely empirical matter.
Condensate collecting system in chemical plants. Barton, Jan. Vyzk. Ustav Uzitkoveho Skla, Novy Bor, Czech. Chemicky Prumysl (1990), 40(8), 396-400. CODEN: CHPUA4 ISSN: 0009-2789. Journal written in Czech. CAN 114:166939 AN 1991:166939 CAPLUS (Copyright (C) 2008 ACS on SciFinder (R))
Abstract
Differences between pressurized and nonpressurized condensate collectors and results of thermal measurements before and after steam separators are shown. To decrease the use of fuel and to reduce the condensate losses, it is important to use pressurized steam separators. The largest deficiencies are found with small steam separators. The efficiency of the condensate collecting system was evaluated in a chem. plant. The temps. at the pipe surfaces were measured to est. the temp. of the condensing medium.
Recovery of diamond powder from used diamond tools. Barton, Jan; Kaplanek, Jiri; Kratochvil, Vlastimil; Moucka, Pavel; Tomeska, Josef. Vyzk. Ustav Uzitkoveno Skla, Crystalex, Statni Podnik, Novy Bor, Czech. Sklar a Keramik (1990), 40(2), 58-60. CODEN: SKKEAQ ISSN: 0037-637X. Journal; General Review written in Czech. CAN 113:63875 AN 1990:463875 CAPLUS (Copyright (C) 2008 ACS on SciFinder (R))
Abstract
A review and discussion, with 19 refs., of experience with the recovery of diamond powder from used (no longer usable) diamond tools and the reuse of diamond grains from tools used for mech. treatment of com. glass.
Method improves pyrolysis TLE [transfer line heat exchanger] operation. Barton, Jan. Chemopetrol, Labem, Czech. Oil & Gas Journal (1990), 88(5), 81-4. CODEN: OIGJAV ISSN: 0030-1388. Journal written in English. CAN 112:141965 AN 1990:141965 CAPLUS (Copyright (C) 2008 ACS on SciFinder (R))
Abstract
Blowdown rate, coke formation, and optimization are analyzed with respect to derivation of an objective cost function for the duration of the operating cycle of a transfer line heat exchanger (waste-heat boiler) for generation of high-pressure steam by using the heat of pyrolysis gas from an ethylene unit.
Thermal coke removal from hydrocarbon cracking reactor tubes. Ohanka, Vlastimil; Tichy, Vladimir; Dvorak, Ludek; Hruby, Augustin; Najemnik, Jiri; Barton, Jan. (Czech.). Czech. (1989), 5 pp. CODEN: CZXXA9 CS 262567 B1 19890714 Patent written in Czech. Application: CS 87-7996 19871109. Priority: . CAN 112:122086 AN 1990:122086 CAPLUS (Copyright (C) 2008 ACS on SciFinder (R))
Patent Family Information
| Patent No. | Kind | Date | Application No. | Date | Priority Application | Date |
| CS 262567 | B1 | 19890314 | CS 1987-7996 | 19871109 | CS 1987-7996 | 19871109 |
Abstract
An increased coke stripping effect was accomplished by flushing the tubes with steam contg. gradually increasing amts. of air with continuous control of CO2 in the effluents. Thus, a clogged reactor after pyrolysis of gas oil was treated at 810° with 2 ton/h steam and the air feed was gradually increased in 100 kg/h-portions up to 900 kg/h. When the CO2 content in the effluent gas dropped to <1%, the steam feed was increased to 3 ton/h and temp. to 850° with unchanged air content, and the flushing was continued for an addnl. 36 h. The extent of coke removal was manifested by the mean heat transfer coeff. of the reactor wall which was 88% of the value measured in fresh mech. cleaned equipment.
Semiempirical model of the combustion chamber of a pyrolysis furnace. Barton, Jan. Vyzk. Ustav Anorg. Chem., Chemopetrol, K. U. O., Usti, Czech. Chemicky Prumysl (1989), 39(8), 399-401. CODEN: CHPUA4 ISSN: 0009-2789. Journal written in Czech. CAN 111:236299 AN 1989:636299 CAPLUS (Copyright (C) 2008 ACS on SciFinder (R))
Abstract
A model of the combustion chamber of a natural gas-fired furnace for hydrocarbon steam cracking is given, in which the chamber is considered as an indirect heat exchanger with heat exchange mediated by convection. A low heat transfer coeff., a high mean log temp. difference, and a correction factor close to unity are characteristic of this formalism of heat transfer in the combustion chamber.
Results of the economic analysis of industrial pyrolysis of light and heavy gasolines. Barton, Jan; Masek, Ludek; Lederer, Jaromir. Vyzk. Ustav Anorg. Chem., Usti nad Labem, Czech. Chemicky Prumysl (1989), 39(6), 289-90. CODEN: CHPUA4 ISSN: 0009-2789. Journal written in Czech. CAN 111:177600 AN 1989:577600 CAPLUS (Copyright (C) 2008 ACS on SciFinder (R))
Abstract
Straight-run light naphthas are better feedstocks for steam cracking for C2H4 prodn. then secondary naphthas. Such straight-run naphthas should not have too broad boiling ranges. Of the secondary feedstocks, high-isoalkane naphthas are unsuitable for C2H4 prodn., but reformates are suitable for C2H4 prodn. Heavier, straight-run naphthas give lower C3H6 yields.
Complex evaluation of data from pyrolysis of a hydrocarbon mixture. Barton, Jan; Masek, Ludek; Lederer, Jaromir. Chemopetrol, k. u. o., Vyzk. Ustav Anorg. Chem., Usti nad Labem, Czech. Chemicky Prumysl (1989), 39(2), 79-82. CODEN: CHPUA4 ISSN: 0009-2789. Journal written in Czech. CAN 110:233571 AN 1989:233571 CAPLUS (Copyright (C) 2008 ACS on SciFinder (R))
Abstract
A method was developed for complex evaluation of data obtained by analyzing mixts. of liq. hydrocarbons entering the pyrolysis unit and also the reaction products leaving the reactor. Data are given for pyrolysis of gasoline. The reaction products passed at a rate .apprx.1 kg/h through a sampling device where liq. components condensed at 5°. The flow rate of non-condensed gas was measured by a flow indicator. The anal. results and the operation conditions of the pyrolysis unit were used as input data for a program calcg. the reaction mixt. compn., conversion of the reaction, reaction heat, and residence time of the reaction mixt. in the reactor.
Method of process water treatment. Dvorak, Ludek; Barton, Jan; Novotny, Petr. (Czech.). Czech. (1988), 7 pp. CODEN: CZXXA9 CS 249185 B1 19881001 Patent written in Czech. Application: CS 85-4840 19850628. Priority: . CAN 110:140964 AN 1989:140964 CAPLUS (Copyright (C) 2008 ACS on SciFinder (R))
Patent Family Information
| Patent No. | Kind | Date | Application No. | Date | Priority Application | Date |
| CS 249185 | B1 | 19870312 | CS 1985-4840 | 19850628 | CS 1985-4840 | 19850628 |
Abstract
Processing H2O used for cooling the gas from pyrolysis of petroleum, asphalt gasoline, ethane, or other hydrocarbon mixts. is freed from hydrocarbons and phenols for recycling by stripping with 1.0-2.2% steam for removal of 1.0-6.5% as vapor phase related to the treated processing H2O. The purifn. effect is the same and the energy consumed in a boiler of the stripping tower is lower than in the case with the usually used high ratios of withdrawn vapor to stripping steam [7:(0.9-1.3)]. Thus, 153,400 kg/h processing H2O (80°) contg. 5700 ppm hydrocarbons and 95 ppm PhOH and 2500 kg/h steam stripping steam were fed into the stripping tower heated with 13,090 kg/h steam giving 148,500 kg/h H2O (110°) contg. 60 ppm hydrocarbons and 65 ppm PhOH and 7400 kg/h vapors.
Capacity usage of an ethylene unit and its effect on the specific energy consumption. . Barton, Jan; Ruzicka, Jaroslav; Ohanka, Vlastimil. Vyzk. Ustav Anorg. Chem., Chemopetrol, k.u.o., Usti nad Labem, Czech. Chemicky Prumysl (1988), 38(12), 636-9. CODEN: CHPUA4 ISSN: 0009-2789. Journal written in Czech. CAN 110:115368 AN 1989:115368 CAPLUS (Copyright (C) 2008 ACS on SciFinder (R))
Abstract
The effect of throughput on specific consumption of steam used in an ethylene (I) unit in I manuf. by pyrolysis of petroleum stocks is illustrated on a concrete example. The specific steam consumption depended not only on the throughput of the I unit as a whole but also on the throughput of individual pyrolysis units.
Pretreatment of pyrolysis gas in manufacture of ethylene and propylene. Barton, Jan; Novotny, Petr; Najemnik, Jiri; Ohanka, Vlastimil. (Czech.). Czech. (1988), 6 pp. CODEN: CZXXA9 CS 250198 B1 19880115 Patent written in Czech. Application: CS 84-6380 19840823. Priority: . CAN 110:58260 AN 1989:58260 CAPLUS (Copyright (C) 2008 ACS on SciFinder (R))
Patent
| Patent No. | Kind | Date | Application No. | Date | Priority Application | Date |
| CS 250198 | B1 | 19870416 | CS 1984-6380 | 19840823 | CS 1984-6380 | 19840823 |
Abstract
In the title process, energy consumption is decreased by cooling hydrocarbon cracking gases from .apprx.450 to .apprx.30° by scrubbing with recycled pyrolysis gasoline at 30-95° to sep. pyrolysis fuel oil and pyrolysis gas oil and scrubbed with water (temp. at the bottom of the scrubber 81-95°) to remove pyrolysis gasoline, which is recycled, and water condensate.
Optimum cleaning of boilers for waste heat in pyrolysis of hydrocarbons. Barton, Jan; Tichy, Vladimir; Benes, Bedrich. Chemopetrol, k. u. o., Vyzk. Ustav. Anorg. Chem., Usti nad Labem, Czech. Chemicky Prumysl (1988), 38(6), 288-9, 291-3. CODEN: CHPUA4 ISSN: 0009-2789. Journal written in Czech. CAN 110:41675 AN 1989:41675 CAPLUS (Copyright (C) 2008 ACS on SciFinder (R))
Abstract
Coke formation in a recuperator boiler for gasoline pyrolysis gases (780-840°) is a reaction catalyzed by the surface of boiler tubes, so the coke deposits at the entrance of the boiler. Coke should be removed from such a boiler after 100 days in operation. A combination of sticking and a surface-catalyzed reaction leads to coke formation in a recuperator boiler for gas oil pyrolysis gases. Such boilers should be cleaned after 30 days in operation.
Isoconversion factors in pyrolysis. Barton, Jan. Vyzk. Ustav Anorg. Chem., Chemopetrol, K. U. O., Usti nad Labem, Czech. Chemicky Prumysl (1988), 38(7), 357-61. CODEN: CHPUA4 ISSN: 0009-2789. Journal written in Czech. CAN 109:151865 AN 1988:551865 CAPLUS (Copyright (C) 2008 ACS on SciFinder (R))
Abstract
A method is proposed for calcn. of isoconversion factors in pyrolysis of hydrocarbons; these factors are useful in characterizing the sensitivity of pyrolysis conversion and variation of parameters of the pyrolysis reaction. The decisive parameters affecting the conversion of the pyrolyzed material and selectivity of the reaction are the temp. at the outlet from the coil of the pyrolysis heater, the hydrocarbon feed, and the steam-hydrocarbon mass flow ratio. The method is exemplified on pyrolysis of gasoline.
Streamlined utilization of butadiene in the manufacture of emulsion butadiene-styrene rubber. Barton, Jan; Hostalek, Miloslav; Potuznik, Jaroslav. (Czech.). Czech. (1987), 8 pp. CODEN: CZXXA9 CS 239520 B1 19870601 Patent written in Czech. Application: CS 83-888 19830209. Priority: . CAN 109:24123 AN 1988:424123 CAPLUS (Copyright (C) 2008 ACS on SciFinder (R))
Patent
| Patent No. | Kind | Date | Application No. | Date | Priority Application | Date |
| CS 239520 | B1 | 19860116 | CS 1983-888 | 19830209 | CS 1983-888 | 19830209 |
Abstract
In the manuf. of SBR by emulsion copolymn. of 1,3-butadiene (I) with styrene (II), an (8-50):1 ł99.7% pure I-crude I (contg. >6% I) mixt. after removal of methylacetylene is used together with recycled I and recycled and pure II. The method increases the yield of SBR and keeps the concn. of I more uniform throughout the polymn. I recovered from the copolymn. is recycled into C4-hydrocarbon fraction resulting in improved distn. of pure I.
Cooling of pyrolysis gas in the hot part of ethylene unit. Bartoň, Jan; Dvorak, Ludek. Vyzk. Ustav Anorg. Chem., Chemopetrol, k. u. o., Usti nad Labem, Czech. Chemicky Prumysl (1987), 37(7), 364-7. CODEN: CHPUA4 ISSN: 0009-2789. Journal written in Czech. CAN 107:80207 AN 1987:480207 CAPLUS (Copyright (C) 2008 ACS on SciFinder (R))
Abstract
Cooling of the pyrolysis gas from 450 to 30° by using oil and water was investigated. Effects of the oil flow rate and reflux during low-pressure steam generation were considered. The system was optimized by inserting an addnl. cooler for the oil reflux. The arrangement enables decreasing the reflux without changing the compn. of the pyrolysis gasoline feed.
Selection of pressure levels in the steam system of an ethylene unit. Barton, Jan; Najemnik, Jiri; Ruzicka, Jaroslav. Chemopetrol, k. u. o., Vyzk. Ustav Anorg. Chem., Usti nad Labem, Czech. Chemicky Prumysl (1987), 37(2), 57-9. CODEN: CHPUA4 ISSN: 0009-2789. Journal written in Czech. CAN 106:214424 AN 1987:214424 CAPLUS (Copyright (C) 2008 ACS on SciFinder (R))
Abstract
The effect of selected pressure levels in the steam system on steam consumption and energy saving of an ethylene (I) [74-85-1] prodn. unit is demonstrated. Ways of heat conservation in I manuf. are discussed.
Two-stage degasification of feed water for steam-producing boilers. Barton, Jan; Dvorak, Ludek; Ruzicka, Jaroslav; Najemnik, Jiri. Vyzk. Ustav Anorg. Chem., Chemopetrol, K.U.O., Usti nad Labem, Czech. Chemicky Prumysl (1986), 36(9), 459-61. CODEN: CHPUA4 ISSN: 0009-2789. Journal written in Czech. CAN 105:158559 AN 1986:558559 CAPLUS (Copyright (C) 2008 ACS on SciFinder (R))
Abstract
To prevent O-induced depolarization and corrosion of steam boiler components the incoming demineralized water was blown with low-pressure steam and then with intermediate-pressure steam. The deaeration was conducted in 2 stripping columns provided with pressure-release valves for the outgoing air. A flow diagram shows integration of the air strippers with an existing water preheating system for a steam-driven turbine and heat recovery from the expanded, partly condensed steam.
Saving energy in stripping operation. Barton, Jan; Dvorak, Ludek. Vyzk. Ustav Anorg. Chem., Chemopetrol, K. U. O., Usti nad Labem, Czech. Chemicky Prumysl (1986), 36(8), 393-6. CODEN: CHPUA4 ISSN: 0009-2789. Journal written in Czech. CAN 105:136797 AN 1986:536797 CAPLUS (Copyright (C) 2008 ACS on SciFinder (R))
Abstract
A theor. anal. is provided of the superheated steam stripping in petrochem. operations, such as the regeneration of absorption oil circulating in the manuf. of C2H4 [74-85-1] by cracking of petroleum feedstocks. The oil, b. >200°, contains alkylnaphthalenes(AN). To prevent the accumulation of AN, .apprx.0.5% of the oil is withdrawn for the steam stripping in a tower. After stripping the oil is used as a fuel, the AN are sepd. from steam, the condensed water is stripped with superheated steam to recover sol. hydrocarbons (mainly styrene [100-42-5]), and recirculated to the steam boiler. The theor. anal. of stripping is expected to enhance the process control and improve its economy.
Intensification by simulation of the production course. Barton, Jan; Bartova, Jitka; Rancak, Jan. Vyzk. Ustav Anorg. Chem., K.U.O. Chemopetrol, Usti nad Labem, Czech. Chemicky Prumysl (1986), 36(2), 68-72. CODEN: CHPUA4 ISSN: 0009-2789. Journal written in Czech. CAN 104:189091 AN 1986:189091 CAPLUS (Copyright (C) 2008 ACS on SciFinder (R))
Abstract
General features of the simulation of the course of a prodn. unit as a means of decision making concerning the prodn. rate improvement are analyzed. The simulation consists of the generation of both planned and accidental prodn. interruptions. The reliability of the prodn. unit is detd. by analyzing past manufg. courses. The actual max. output of the unit is verified under real prodn. conditions. The effects of (1) increased capacity of storage tanks, (2) increase of the max. output in several subunits, (3) prolonging of the time fund of the prodn. unit, and (4) a combination of these measures were evaluated on an exemplary unit for manufg. powd. detergents.
Thermal compression of vapor from the head of a rectification column. Barton, Jan; Ederer, Karel. Vyzk. Ustav Anorg. Chem., Chemopetrol, K. U. O., Usti nad Labem, Czech. Chemicky Prumysl (1985), 35(11), 561-4. CODEN: CHPUA4 ISSN: 0009-2789. Journal written in Czech. CAN 104:91126 AN 1986:91126 CAPLUS (Copyright (C) 2008 ACS on SciFinder (R))
Abstract
The thermal compression of vapors from a rectification column, contg. .apprx.99% water vapor, was analyzed. The resulting steam is suitable as a heating medium for the column heater. The optimum temp. of the compressed vapor and the compression ratio were calcd. from a cost function defined as the sum of operating costs for the thermal compression, cost of the compressor and column heater, and cost of the low-pressure heating steam. The optimum compression ratio p2/p1 = 1.13 (where p1 is the pressure of the vapor in the column and p2 is the pressure after compression). The heater, which utilizes the compressed steam, operates with a small temp. difference between the compressed steam and the boiling temp. in the column (.apprx.5 K), and therefore a large heat-exchanging surface is required for effective operation.
Material and enthalpy balances of a technological subsystem operating in unsteady state. Vyborny, Jiri; Barton, Jan; Cermak, Jan. Chemopet. K. U. O. Vyzk. Ustav Anorg. Chem., Usti nad Labem, Czech. Chemicky Prumysl (1985), 35(10), 508-13. CODEN: CHPUA4 ISSN: 0009-2789. Journal written in Czech. CAN 104:70977 AN 1986:70977 CAPLUS (Copyright (C) 2008 ACS on SciFinder (R))
Abstract
A method was developed for the approxn. of the dynamics of a technol. subsystem by means of a linear stochastic model, the parameters of which are extd. from exptl. data. It enables describing a steady-state system using the data measured in a transient state. This is advantageous when the steady state is difficult to reach. The approxn. gives a system of linear equations together with the steady-state amplification matrix, which describes the relation between the input and output parameters in the steady state. The enthalpy and material balances of the subsystem were solved together with the system of linear equations. The latter system describes satisfactorily the properties of the system at a given accuracy of measurements and given methods of calcn. of the enthalpies of streams.
Heat recovery in a rectification column. Barton, Jan; Ederer, Karel. Chemopetrol K. U. O. Vyzk. Ustav Anorg. Chem., Usti nad Labem, Czech. Chemicky Prumysl (1985), 35(6), 281-4. CODEN: CHPUA4 ISSN: 0009-2789. Journal written in Czech. CAN 103:106825 AN 1985:506825 CAPLUS (Copyright (C) 2008 ACS on SciFinder (R))
Abstract
The use of heat of condensation of the top fraction from a rectification column for preheating of a charge was considered. Steam consumption for the column reboiler was considerably decreased. The charge was preheated to a temp. only .apprx.0.1 K lower than the temp. of vapor condensation. The column was used for decreasing the hydrocarbon content in boiler feed water from 800-1000 to 200-250 mg/kg water.
Optimizing the performance of an evaporator for olefinic hydrocarbons. Barton, Jan; Hostalek, Miloslav; Janura, Jaroslav. Vyzk. Ustav Anorg. Chem., Chemopetrol, K. U. O., Usti nad Labem, Czech. Chemicky Prumysl (1984), 34(5), 230-3. CODEN: CHPUA4 ISSN: 0009-2789. Journal written in Czech. CAN 101:55549 AN 1984:455549 CAPLUS (Copyright (C) 2008 ACS on SciFinder (R))
Abstract
The performance of an evaporator for olefinic hydrocarbons in 1,3-butadiene [106-99-0] manuf. is described taking into account scaling of the inner tube walls with polymers. The decrease of the heat transfer coeff. due to scaling is compensated by an increased temp. gradient on the heat-exchanging surfaces of the evaporator resulting in increased operating costs. A cost function is derived, which takes into account the cost of cleaning the heat-exchanging surfaces, cost of heating vapor, and cost of cooling water in the subsequent technol. stages. A more frequent cleaning of the inner tube walls resulted in a significant redn. of the cost for heating vapor and cooling water.
Effect of the amine structure on the course of linear anionic-coordination dimerization of isoprene in the presence of dialkylamine and sodium. Barton, Jan; Hrubes, Martin; Kaspar, Miroslav; Ruzicka, Vlastimil. Dep. Org. Technol., Prague Inst. Chem. Technol., Prague, Czech. Collection of Czechoslovak Chemical Communications (1983), 48(8), 2361-7. CODEN: CCCCAK ISSN: 0366-547X. Journal written in English. CAN 100:34713 AN 1984:34713 CAPLUS (Copyright (C) 2008 ACS on SciFinder (R))
Abstract
The selectivity of the dimerization of isoprene to ß-myrcene in the presence of Na and RR1NH (R, R1 = Me, Me2CH; Et, Me2CH; Pr, Me2CH; Bu, Me2CH; etc.) depended on the polar properties of R and R1, whereas the rate of formation of ß-myrcene depended more on their steric properties.
The mechanism of formation of 2,7-dimethyl-2,6-octadiene in the synthesis of 3-methylene-7-methyl-1,6-octadiene. Barton, Jan; Kminek, Ivan. Dep. Org. Technol., Prague Inst. Chem. Technol., Prague, Czech. Collection of Czechoslovak Chemical Communications (1983), 48(7), 1864-6. CODEN: CCCCAK ISSN: 0366-547X. Journal written in English. CAN 99:122662 AN 1983:522662 CAPLUS (Copyright (C) 2008 ACS on SciFinder (R))
Abstract
Me2C:CHCH2CH2CH:CMe2 (I) is formed in the catalytic soln. for the dimerization of isoprene to ß-myrcene [CH2:CHC(:CH2)CH2CH2CH:CMe], as revealed by 13C NMR and mass spectroscopy. Visual observations together with the results of gas chromatog. anal. of the catalytic solns. suggests that the formation of I is assocd. with the transition of the Na from the solid phase into the soln. A reaction pathway for the formation of I is shown.
Determination of the reliability of a reactor for partial oxidation of petroleum residues. Barton, Jan; Vyskocil, Zdenek. Vyzk. Ustav Anorg. Chem., Usti, Czech. Chemicky Prumysl (1983), 33(2), 69-73. CODEN: CHPUA4 ISSN: 0009-2789. Journal written in Czech. CAN 98:110104 AN 1983:110104 CAPLUS (Copyright (C) 2008 ACS on SciFinder (R))
Abstract
Reliability of components of a chem. reactor for partial oxidn. of petroleum residues by a steam-O mixt. is discussed and statistically evaluated. No failures were obsd. for a steel jacket and refractory lining. Reliability of a burner nozzle, temp. sensors, and flange seals increased exponentially with increasing breakdown frequency. Reliability of the whole reactor was equal to the product of reliability functions for individual reactor components.
Kinetics of the anionic coordination dimerization of isoprene. Barton, Jan; Kaspar, Miroslav; Ruzicka, Vlastimil. Dep. Org. Technol., Prague Inst. Chem. Technol., Prague, Czech. Collection of Czechoslovak Chemical Communications (1982), 47(2), 594-602. CODEN: CCCCAK ISSN: 0366-547X. Journal written in English. CAN 96:162952 AN 1982:162952 CAPLUS (Copyright (C) 2008 ACS on SciFinder (R))
Abstract
Kinetic measurements of the anionic coordination dimerization of isoprene to ß-myrcene initiated with Na in the presence of dicyclohexylamine in THF showed that ionic pairs of isoprenyl Na were addnl. solvated by 2 mols. of THF. A kinetic model of the reaction enabled the time dependence of the isoprene concn. to be expressed in a 2-parameter equation.
Mechanism of anionic coordination dimerization of isoprene. . Barton, Jan; Volka, Karel; Kaspar, Miroslav; Ruzicka, Vlastimil. Dep. Org. Technol., Prague Inst. Chem. Technol., Prague, Czech. Collection of Czechoslovak Chemical Communications (1981), 46(7), 1600-6. CODEN: CCCCAK ISSN: 0366-547X. Journal written in English. CAN 95:133410 AN 1981:533410 CAPLUS (Copyright (C) 2008 ACS on SciFinder (R))
Abstract
The coordination anionic dimerization of isoprene (I) [78-79-5] to 3-methylene-7-methyl-1,6-octadiene (II) [123-35-3] in the system THF-I-alkali metal (Li, Na, K)-secondaryy amine [dicyclohexylamine (III) [101-83-7], N-isopropylcyclohexylamine [1195-42-2], iso-PrNHMe [4747-21-1]] (13:13:1:1 ratio) at ambient temp. was studied by visible spectrometry and gas chromatog. Colored ɲ-complexes of metalated I, II, and higher oligomers and amines are stabilized by the electron pair of THF. The basic dimerization mechanism, equil. metalation of I by alkali metal dialkylamide, is affected by the anionic affinity of the metal and is shifted towards starting materials for Li-III.
Palladium complex-catalyzed linear dimerization of 2-methyl-1,3-butadiene. Barton, Jan; Ruzicka, Vlastimil. Dep. Org. Technol., Czech. Sbornik Vysoke Skoly Chemicko-Technologicke v Praze, C: Organicka Chemie a Technologie (1980), C 26 87-95. CODEN: SVOCAF ISSN: 0554-9728. Journal written in English. CAN 95:41834 AN 1981:441834 CAPLUS (Copyright (C) 2008 ACS on SciFinder (R))
Abstract
Linear dimerization of 2-methyl-1,3-butadiene using complex homogeneous catalyst has been studied. Homogeneous catalytic system consisted of palladium compds. (palladium(II) bis-2,4-pentadionate, palladium(II)acetate, or palladium(II)nitrate), triphenylphosphine, potassium phenoxide, and 2-methyl-1,3-butadiene. It was found that the 2,7-dimethyl-1,3-trans-7-octatriene is the main product when this catalytic system is added to the mixt. of 2-propen-1-ol and 2-methyl-1,3-butadiene. The study of the effect of different palladium compds. on the conversion and on the selectivity of reaction revealed that the highest values of both factors result if palladium(II) bis-2,4-pentadionate complex was used.
Effect of the structure of unsaturated compounds on their epoxidation rate by peracetic acid. Cerveny, Libor; Barton, Jan; Ruzicka, Vlastimil. Inst. Org. Technol., Prague Inst. Chem. Technol., Prague, Czech. Sbornik Vysoke Skoly Chemicko-Technologicke v Praze, C: Organicka Chemie a Technologie (1976), C 24 125-7. CODEN: SVOCAF ISSN: 0554-9728. Journal written in German. CAN 86:139003 AN 1977:139003 CAPLUS (Copyright (C) 2008 ACS on SciFinder (R))
Abstract
A correlation for the kinetic data of the title reaction was given via the Taft equation: log krel = 0.89 σ* - 0.66 Es + 5.10 (r = .975).
Pinch technology improves olefin heat recovery. Barton, J.. Res. Inst. Inorg. Chem., Chemopetrol, Usti nad Labem, Czech. Hydrocarbon Processing, International Edition (1989), 68(2), 47-8. CODEN: IHPRBS ISSN: 0018-8190. Journal written in English. CAN 110:193427 AN 1989:193427 CAPLUS (Copyright (C) 2008 ACS on SciFinder (R))
Abstract
The application of "pinch" technol. to improve heat recovery in pyrolysis of gas oils to olefins was presented. A 20% decrease in steam consumption and a 11% decrease in coolant requirement could be realized by the pinch technol.
An energy model of an industrial naphtha pyrolysis furnace. Barton, J.; Ohanka, V.; Tichy, V. Syst. Eng. Lab., Chemopetrol - Res. Inst. Inorg. Chem., Usti nad Labem, Czech. Hungarian Journal of Industrial Chemistry (1988), 16(3), 305-16. CODEN: HJICAI ISSN: 0133-0276. Journal written in English. CAN 110:115371 AN 1989:115371 CAPLUS (Copyright (C) 2008 ACS on SciFinder (R))
Abstract
A model of a naphtha pyrolysis furnace for an ethylene prodn. unit was described for calcg. energy consumption under industrial conditions. The consumption of energy supplied by the burning gas fuel within the furnace radiation zone per 1 kg of naphtha fed into the furnace decreased with a decrease in both naphtha flow rate and ratio of the dilg. process steam to naphtha. When the furnace load dropped to 70% of the design capacity, the sp. energy consumption in relation to a wt. unit of naphtha decreased by .apprx.10%.