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Production of 1, 2-dichloroethane

A technology of dichloroethane and ethylene, which is applied in the preparation of halogenated hydrocarbons, organic chemistry, organic chemical methods, etc., can solve the problems of expensive wastewater treatment, insufficient PCDD/PCDF separation, catalyst loss, etc., and achieve simple cost, Effect of space saving and high operational reliability

Inactive Publication Date: 2007-04-04
芬诺利特技术两合公司
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0013] Disadvantages of this method have proven to be that the effluent from the quench has to be disposed of very expensively, since the effluent also contains catalyst losses
[0014] All known prior art methods have the disadvantage that either only an insufficient separation of PCDD / PCDF is possible, or that a sufficiently high separation rate can only be achieved with the aid of expensive apparatus or through complex process steps

Method used

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  • Production of 1, 2-dichloroethane
  • Production of 1, 2-dichloroethane

Examples

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Embodiment 1

[0047] Use an oxychlorination reactor with a fluidized bed to prepare 1,2-dichloroethane, where CuCl 2 Used as a catalyst. Here, the oxychlorination reaction is carried out under common method conditions known to those skilled in the art, so no specific enumeration is given here.

[0048] Reactive gas (500Nm 3 / h) after leaving the fluidized bed reactor, at a temperature of 200-250° C. (preferably 220° C.) and a pressure of about 1-6 bar (preferably 3.5 bar) through the fine filter of the purification zone in dry operation to Separation of small catalyst particles mixed together, the so-called catalyst loss, such that the catalyst is practically completely separated.

[0049] The fine filter consists of 8 filter parts. The filter parts are made of material 316S (stainless steel). The 8 filter elements are periodically backwashed through automatic valves. Preheated nitrogen was used as backwash gas, which had a pressure of 8 bar. The fine powder separated on the cone surf...

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Abstract

The invention relates to a method and a device for producing 1,2-dichloroethane by reacting ethylene with hydrogen chloride and an oxygen-containing gas in an oxychlorination reactor having a fluidised bed, in order to form a reaction gas. Said reaction gas is filtered outside the oxychlorination reactor by means of at least one filter candle.

Description

technical field [0001] The invention relates to a process and a plant for the preparation of 1,2-dichloroethane by the reaction of ethylene with hydrogen chloride and an oxygen-containing gas in an oxychlorination reactor with a fluidized bed for the formation of reaction gases . Background technique [0002] Oxychlorination can be understood as the reaction of olefins (here ethylene) with hydrogen chloride and oxygen or an oxygen-containing gas such as air and form saturated chlorinated alkanes (here 1,2-dichloroethane), which are given below Also referred to herein as "EDC". Here, the reaction proceeds according to the following equation: [0003] <chemistry num="001"> <chem file="02804900_cml001.xml" / > < / chemistry> . [0004] However, the by-product water of this reaction can form very corrosive hydrochloric acid with the unreacted starting material hydrogen chloride, so that when carrying out these processes, it is necessary to use corresponding ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C07C17/156C07C19/045C07B61/00
CPCC07C17/156C07C19/045
Inventor 彼得·卡默霍弗因戈尔夫·米尔克霍斯特·埃特尔京特·施泰布
Owner 芬诺利特技术两合公司
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