Ethylene oxychlorination catalyst and its preparation method and application

A technology of chlorination reaction and catalyst, which is applied in the field of ethylene oxychlorination reaction catalyst and its preparation and application, which can solve the problems of easy corrosion and shutdown of reaction devices, etc., achieve high catalyst processing capacity, reduce by-products, and reduce unit consumption Effect

Active Publication Date: 2009-02-04
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to its high copper content, the catalyst processing capacity is higher than that of catalysts with low copper content under the same reaction conditions, but the reaction device is prone to corrosion, resulting in shutdown

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0059] 30ml of titanium tetrachloride solution A; add 80g of aluminum hydroxide powder to 150ml of sodium hydroxide solution at 100°C and stir to prepare sodium hydroxide / aluminum oxide (weight ratio) = 1.4-1.6 metaaluminate For sodium solution B, the co-precipitation reaction is carried out under the conditions of room temperature and pH 6.0-9.0. After the precipitation, it is aged for 24 hours, filtered, washed, peptized and spray-dried. After drying, it is calcined at 600°C to obtain alumina-titania microsphere carrier with an average particle size of 40-60μm, and the weight content of titania is 20wt%.

[0060] Dissolve copper chloride, potassium chloride, cerium chloride, and zinc chloride in water, impregnate the carrier, and dry at 120°C for 2 hours. The catalyst of the present invention containing 4 wt% copper, 1 wt% cerium, 1.5 wt% potassium, and 1 wt% zinc was obtained.

Embodiment 2

[0062] The operation steps and methods are the same as those in Example 1, except that the content of potassium as a co-active component is changed to obtain the catalyst of the present invention containing 4 wt% copper, 1 wt% cerium, 2 wt% potassium, and 1 wt% zinc.

Embodiment 3

[0064] The operation steps and methods are the same as those in Example 1, except that the content of the auxiliary active component potassium is changed to obtain the catalyst of the present invention containing 4 wt% copper, 1 wt% cerium, 1.0 wt% potassium, and 1 wt% zinc.

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PUM

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Abstract

A catalyst for the oxychlorinating reaction of ethene to prepare dichloroethane is composed of the carrier (aluminum oxide-titanium oxide microballs), primary active component (Cu) and secondary active component consisting of at least one of La, Ce, Nd, Pr and Y, one transition metal and at least one alkali metal. Its preparing process includes preparing carrier by codeposition, and dipping in active components.

Description

Technical field [0001] The invention relates to a catalyst for oxychlorination reaction, a preparation method and application thereof. Background technique [0002] 1,2-Dichloroethane, commonly known as dichloroethane (EDC), is a compound that is industrially produced millions of tons per year. After cracking, the compound is converted into vinyl chloride (VCM) and hydrogen chloride. Monomers can be polymerized into polyvinyl chloride (PVC) that has a wide range of uses. The HCl obtained by cracking is separated from VCM, and then contacted with ethylene and oxygen-containing gas in the presence of a catalyst for the production of EDC, which is the oxychlorination reaction. [0003] At present, according to the different raw material routes, two different oxychlorination methods are mainly used in the industry to produce chlorinated hydrocarbons: one is the air method represented by BFGoodrich in the United States, which uses air, ethylene and hydrogen chloride as raw materials. ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J23/72B01J23/76B01J37/02C07C17/156C07C19/045
Inventor 黄凤兴齐兰芝刘晓红贾春革
Owner CHINA PETROLEUM & CHEM CORP
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