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Ethylene oxychlorination catalyst and its preparation method and application

A chlorination reaction and catalyst technology, which is applied to the ethylene oxychlorination reaction catalyst and the fields of preparation and application thereof, can solve the problems of easy corrosion and shutdown of the reaction device, and achieves high catalyst processing capacity, reduced by-products, and good wear resistance. performance-impairing effects

Active Publication Date: 2007-07-18
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

[0060] 30ml of titanium tetrachloride solution A; 80g of aluminum hydroxide powder was added to 150ml of sodium hydroxide solution at 100°C and stirred to obtain metaaluminic acid with sodium hydroxide / aluminum oxide (weight ratio) = 1.4 to 1.6 The sodium solution B is subjected to co-precipitation reaction at room temperature and pH of 6.0 to 9.0. After the precipitation, aging for 24 hours, filtering, washing, peptizing and spray drying, after drying, roasting at 600°C to obtain alumina-titania microsphere carrier, the average particle size is 40-60 μm, and the weight content of titanium oxide is 20 wt%.

[0061] 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 copper 4wt%, cerium 1wt%, potassium 1.5wt%, and zinc 1wt% was obtained.

Embodiment 2

[0063] Operation steps and method are the same as embodiment 1, just change the content of auxiliary active component potassium, obtain the catalyst of the present invention containing copper 4Wt%, cerium 1Wt%, potassium 2Wt%, zinc 1Wt%.

Embodiment 3

[0065] Operation steps and method are the same as embodiment 1, just change the content of auxiliary active component potassium, obtain the catalyst of the present invention containing copper 4Wt%, cerium 1Wt%, potassium 1.0Wt%, zinc 1Wt%.

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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 and its preparation method and application. Background technique [0002] 1,2-Dichloroethane, commonly known as ethylene dichloride (EDC), is a compound that is industrially produced in the millions of tons per year, which is cracked to convert vinyl chloride (VCM) and hydrogen chloride, vinyl chloride Monomers can be polymerized into polyvinyl chloride (PVC) which is widely used. 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 different raw material routes, two different oxychlorination methods are mainly used in industry to produce chlorinated hydrocarbons: one is the air method represented by B.F.Goodrich Company of the United States, which uses air, ethylene and hydrogen chloride as raw materia...

Claims

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Application Information

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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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