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Method of preparing trans-1,2-dichloroethylene from mixed chlorohydrocarbon

A technology of dichlorethylene and chlorinated hydrocarbons, which is applied in the field of comprehensive utilization of by-product mixed chlorinated hydrocarbons, can solve problems such as unsuccessful reports, achieve good social and economic benefits, be easy to operate, and solve comprehensive utilization problems problem effect

Inactive Publication Date: 2010-10-06
YANGZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

And use the mixed chlorinated hydrocarbons 1,1,2-trichloroethane, 1,1,2-trichloroethylene, 1,1,2,2-tetrachloroethane, 1,1, 2,2-tetrachloroethylene and a small amount of high boiling point substances to prepare trans-1,2-dichloroethylene research, has not yet seen a successful report

Method used

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  • Method of preparing trans-1,2-dichloroethylene from mixed chlorohydrocarbon
  • Method of preparing trans-1,2-dichloroethylene from mixed chlorohydrocarbon
  • Method of preparing trans-1,2-dichloroethylene from mixed chlorohydrocarbon

Examples

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Embodiment 1

[0054] The raw material chlorinated hydrocarbon mixture is sent into the gasifier 4 by the metering pump 3, and the temperature of the gasifier 4 is maintained at 150°C. The vaporized mixed chlorinated hydrocarbon gas passes through the reactor 5 and the condenser 7 in sequence. The temperature of the reactor was 240°C. The residence time of the feed gas is 3 minutes, and the inlet temperature of the condensed water is 5°C. The product is collected by the product storage tank 9, and analyzed by gas chromatography after washing with water and alkali.

[0055] The components and weight percentages of the raw material chlorinated hydrocarbon mixture mainly include:

[0056] Vinylidene chloride 1.13% (wt)

[0057] cis-1,2-dichloroethylene 2.17% (wt)

[0058] Trans-1,2-dichloroethylene 4.21% (wt)

[0059] 1,1,2-Trichloroethylene 8.31%(wt)

[0060] 1,1,2-Trichloroethane 48.31% (wt)

[0061] 1,1,2,2-Tetrachloroethylene 15.41% (wt)

[0062] 1,1,2,2-Tetrachloroethane 19.45% (wt...

Embodiment 2

[0072] Adopt the process condition of embodiment 1, device and the composition and weight percentage of raw material chlorinated hydrocarbon mixture, wherein the residence time of raw material gas is 4min. The components and weight percentages of the chlorinated hydrocarbon mixture rich in trans-1,2-dichloroethylene after the reaction mainly include:

[0073] Vinylidene chloride 6.34% (wt)

[0074] cis-1,2-dichloroethylene 10.61% (wt)

[0075] Trans-1,2-dichloroethylene 69.76% (wt)

[0076] 1,1,2-Trichloroethylene 4.48% (wt)

[0077] 1,1,2-Trichloroethane 8.52%(wt)

[0078] 1,1,2,2-Tetrachloroethylene 0.29% (wt)

Embodiment 3

[0080] Adopt the processing condition and the device of embodiment 1. The components and weight percentages of the raw material chlorinated hydrocarbon mixture mainly include:

[0081] 1,2-Dichloroethane 5%(wt)

[0082] 1,1,2-Trichloroethane 67%(wt)

[0083] 1,1,2,2-Tetrachloroethane 21%(wt)

[0084] Pentachloroethane 5% (wt)

[0085] Other polychlorinated hydrocarbons 1.94% (wt)

[0086] The components and weight percentages of the chlorinated hydrocarbon mixture rich in trans-1,2-dichloroethylene after the reaction mainly include:

[0087] Vinylidene chloride 5.16% (wt)

[0088] cis-1,2-dichloroethylene 11.25% (wt)

[0089] Trans-1,2-dichloroethylene 66.99% (wt)

[0090] 1,2-dichloroethane 2.32% (wt)

[0091] 1,1,2-Trichloroethylene 7.73% (wt)

[0092] 1,1,2-Trichloroethane 5.82%(wt)

[0093] 1,1,2,2-Tetrachloroethylene 0.73% (wt)

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Abstract

The invention discloses a making method of 1, 2-dichloroethylene through blending chlorohydrocarbon, which comprises the following steps: gasifying chlorohydrocarbon composition in the gasifying chamber under 120-200 deg.c; catalyzing to remove Cl2 or HCl from composite gas of chlorohydrocarbon in the pipe-typed reactor; producing composite gas with rich trans-dichloroethylene; setting the reacting temperature between 150 and 300 deg.c for 1-10 min; condensing composite gas with dichloroethylene in the condenser under 0-30 deg.c; recycling Cl2 or HCl; obtaining the composite liquid with 5-30%(wt) 1, 1, 2-ethinyltrichloride, 15-70%(wt) 1, 1, 2-genklene, 10-30%(wt) 1, 1, 2, 2-ankilostin and 10-40%(wt) 1, 1, 2, 2-tetrachloroethane.

Description

technical field [0001] The invention relates to a method for preparing trans-1,2-dichloroethylene by mixing chlorinated hydrocarbons, which belongs to the preparation of chlorinated hydrocarbons, more precisely, belongs to the comprehensive utilization of by-product mixed chlorinated hydrocarbons. Background technique [0002] There are two isomers of l,2-dichloroethylene, trans-1,2-dichloroethylene and cis-1,2-dichloroethylene. Its structural formula is as follows: [0003] [0004] Both trans and cis 1,2-dichloroethylene are colorless transparent oily liquids at room temperature, with melting points of -49.44°C and -81.47°C and boiling points of 47.7°C and 60.2°C respectively. They are slightly toxic and pleasant odor. In case of humidity, sunlight and air, it will gradually decompose and release hydrogen chloride. Soluble in alcohol, ether and other organic solvents, insoluble in water. Compared with cis-1,2-dichloroethylene, trans-1,2-dichloroethylene is less toxi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C07C21/073C07C17/25
Inventor 赵红坤张道森
Owner YANGZHOU UNIV
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