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Catalyst used in process of preparing vinyl chloride from 1,2-ethylene dichloride and preparation method of catalyst

A kind of dichloroethane preparation, catalyst technology, applied in 1 field

Active Publication Date: 2012-10-24
天津渤化化工发展有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

When the conversion rate of 1,2-dichloroethane is 35.8%, the maximum selectivity of VCM is 90.1%, which is not very high

Method used

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  • Catalyst used in process of preparing vinyl chloride from 1,2-ethylene dichloride and preparation method of catalyst

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Effect test

preparation example Construction

[0017] The preparation of the former powder of HZSM-5 molecular sieve in the embodiment is as follows:

[0018] Take 500 grams of Na-ZSM-5 molecular sieve (silicon-aluminum ratio 38), add it to 5000ml 2.3M ammonium chloride solution, conduct ion exchange at 85°C for 4 hours, exchange 3 times in total, and use deionized water after each exchange After washing, filtering, drying at 110°C for 12 hours, and calcining at 500°C for 6 hours, HZSM-5 molecular sieve was obtained.

Embodiment 1

[0020] Weigh 300g of HZSM-5 molecular sieve (silicon-aluminum ratio 38) and add it to 1500g of lanthanum chloride solution with 5% La loading, soak for 8 hours at room temperature, filter, dry at 110°C, and roast at 500°C for 6 hours , to obtain La / HZSM-5 molecular sieve containing rare earth. 200g silica sol (SiO 2 Content 30wt%) and 140gLa / HZSM-5 molecular sieve were added to quantitative deionized water successively, after stirring for 20min, centrifugal spray drying, the rotating speed of the atomizer was 40Hz, the inlet temperature was 240°C, the outlet temperature was 130°C, and the product obtained was 500 ℃ roasting for 6 hours to obtain the desired finished catalyst.

Embodiment 2

[0022] Carry out the preparation of La / HZSM-5 molecular sieve according to embodiment one. Then 267g silica sol (SiO 2 Content 30wt%) and 120gLa / HZSM-5 molecular sieve were added to quantitative deionized water successively, after stirring for 20min, centrifugal spray drying, the rotating speed of the atomizer was 40Hz, the inlet temperature was 240°C, the outlet temperature was 130°C, and the product obtained was 500 ℃ roasting for 6 hours to obtain the desired finished catalyst.

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Abstract

The invention provides a catalyst used in the process of preparing vinyl chloride from 1,2-ethylene dichloride and a preparation method of the catalyst. The catalyst consists of 10.0 to 80.0 weight percent of zeolite and 20.0 to 90.0 weight percent of inorganic oxide substrate, wherein the zeolite is a zeolite socony mobil-5 (ZSM-5) molecular sieve which comprises a rare earth element and has a melt flow index (MFI) structure; the rare earth element is 1 to 15 weight percent based on RE2O3; RE represents the rare earth element; and the inorganic oxide substrate can be a pure oxide or a complex of a plurality of oxides. In the preparation method, the catalyst is prepared by a spray drying forming method. Compared with the conventional thermal cracking technology, the method has the advantages that: energy consumption can be greatly reduced, production cost is reduced, and the catalyst is suitable for a fluidized bed reaction device.

Description

technical field [0001] The invention relates to the technical field of catalysts, in particular to a catalyst for producing vinyl chloride from 1,2-dichloroethane. Background technique [0002] Vinyl chloride (VCM for short) is a very important chemical raw material, mainly used in the synthesis of polyvinyl chloride resin (PVC) and vinylidene chloride, refrigerants and so on. 99% of the world's vinyl chloride monomer is used to produce polyvinyl chloride. At present, the production processes of vinyl chloride mainly include calcium carbide acetylene method, equilibrium oxychlorination method, direct chlorination of ethylene / oxidation of hydrogen chloride and direct oxychlorination of ethane. The output of VCM produced by the equilibrium oxychlorination method accounts for more than 90% of the total output of VCM, and is the most widely used VCM production method. [0003] The reaction process of the equilibrium oxychlorination method is divided into three parts: ethylene ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J29/40C07C21/06C07C17/25
Inventor 王滨郭庆昌潘靖刘伟
Owner 天津渤化化工发展有限公司
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