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Catalyst for preparing vinyl chloride and preparation method thereof

A technology for producing vinyl chloride and catalysts, applied in catalyst activation/preparation, chemical instruments and methods, hydrogen halide addition preparation, etc., can solve problems such as loss, failure, and unsatisfactory catalytic life, and achieve excellent reaction activity and long-term stability. Good performance and long-lasting catalytic activity

Active Publication Date: 2021-03-19
李通
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The shortcomings of this patent: the catalytic active components of the catalyst are not tightly combined with the carrier, there are loss and failure phenomena in the application process, the catalytic life is not ideal, and the long-term stability of the catalyst needs to be further improved

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0056] A catalyst for producing vinyl chloride and a preparation method thereof, including preparation of silica sol, treatment of activated carbon, absorption, modification, molding, loading and activation.

[0057] (1) For the preparation of silica sol, first mix a predetermined number of anhydrous ethanol and deionized water, then put in cetyltrimethylammonium bromide and ammonia water, stir at 400RPM for 3min, and then put in ethyl orthosilicate Esters, stirred at 200RPM for 2h, and then put a predetermined number of sol modification solutions into the silica sol, stirred and mixed evenly, and stood for 1h; the silica sol was prepared and set aside.

[0058] The volume ratio of absolute ethanol: deionized water: cetyltrimethylammonium bromide: ammonia water: ethyl tetrasilicate is 100:3:5:2:20.

[0059] The addition of the sol modification liquid is 25% of the total mass of the material.

[0060] The sol modification solution includes N-methylpyrrolidone (NMP), N,N-dimeth...

Embodiment 2

[0084] A catalyst for producing vinyl chloride and a preparation method thereof, including preparation of silica sol, treatment of activated carbon, absorption, modification, molding, loading and activation.

[0085] (1) For the preparation of silica sol, first mix a predetermined number of anhydrous ethanol and deionized water, then put in cetyltrimethylammonium bromide and ammonia water, stir at 500RPM for 5min, and then put in ethyl orthosilicate Esters, stirred at 300RPM for 2h, and then put a predetermined number of sol modifying solutions into the silica sol, stirred and mixed evenly, and stood for 1.2h; the silica sol was prepared and set aside.

[0086] The volume ratio of absolute ethanol: deionized water: cetyltrimethylammonium bromide: ammonia water: ethyl tetrasilicate is 110:2:7:4:25.

[0087] The addition amount of described sol modification liquid is 28% of material gross mass.

[0088] The sol modification solution includes N-methylpyrrolidone (NMP), N,N-dimet...

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Abstract

The invention provides a catalyst for preparing vinyl chloride and a preparation method of the catalyst. The preparation method comprises the following steps of: preparation of silicon dioxide sol, treatment of activated carbon, absorption, modification forming, loading and activation. The catalyst has the beneficial effects that: the optimal catalytic effect can be achieved at a temperature of 95-105DEG C, and the low-temperature reaction activity is excellent; by-products can be effectively prevented from influencing the performance of the catalyst; in the process of catalytic preparation ofvinyl chloride by reaction of acetylene and hydrogen chloride, the initial conversion rate of acetylene is greater than 99.3%, and the selectivity of vinyl chloride is greater than 99.5%; the overallcatalytic service life of the catalyst exceeds 15,000 hours, and the requirement of large-scale industrial production can be met.

Description

technical field [0001] The invention relates to the field of vinyl chloride catalysts, in particular to a catalyst for producing vinyl chloride and a preparation method thereof. Background technique [0002] Polyvinyl chloride (PVC) is one of the synthetic resins with superior performance and wide application. Widely used in industrial products, building materials, pipes, decorative materials, wires and cables, and also in packaging materials, sealing materials, fibers, etc. [0003] At present, the industrial production methods of vinyl chloride mainly include ethylene method and acetylene method. Among them, the ethylene method: ethylene is used as raw material, and chlorine gas is chlorinated under the action of ferric chloride catalyst to produce dichloroethane, and dichloroethane is thermally decomposed to produce vinyl chloride and hydrogen chloride; hydrogen chloride and oxygen chlorine Under the action of copper chloride catalyst, dichloroethane can be produced by ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J31/26B01J21/18B01J21/08B01J37/02B01J37/03B01J37/34C07C17/08C07C21/06C01B33/145C01B33/146
CPCB01J31/26B01J21/18B01J21/08B01J37/0207B01J37/036B01J37/346C07C17/08C01B33/145C01B33/146C07C21/06
Inventor 李通
Owner 李通
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