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A kind of composite low-mercury complex catalyst for synthesizing vinyl chloride and preparation method thereof

A catalyst and complex technology, applied in the field of compound low-mercury complex catalyst and its preparation, can solve the problems of environmental pollution, fast deactivation, high mercury chloride content, etc., and achieve the effect of reducing sublimation loss and increasing reactivity

Active Publication Date: 2016-05-18
DALIAN RES & DESIGN INST OF CHEM IND
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The purpose of the present invention is to solve the problems of the traditional high-mercury catalyst used in the production of vinyl chloride by the acetylene method, such as high mercuric chloride content, poor thermal stability, easy loss, fast deactivation, and serious environmental pollution, and further provide a catalyst with high catalytic activity. A compound low-mercury complex catalyst for synthesizing vinyl chloride with strong stability and preparation method thereof

Method used

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  • A kind of composite low-mercury complex catalyst for synthesizing vinyl chloride and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0021] (1) Dissolve 0.2715g (0.001mol) of mercuric chloride in dilute hydrochloric acid, add it to 10g of activated carbon, impregnate at room temperature for 8 hours, and dry at 120°C for 8 hours to obtain a mercuric chloride catalyst.

[0022] (2) Dissolve 0.2641g (0.001mol) of 18-crown-6 in dilute hydrochloric acid under stirring, add dropwise the mercuric chloride catalyst prepared in step (1) after clarification, impregnate at room temperature for 8 hours, and dry at 120°C for 8 hours. A mercury complex catalyst was obtained.

[0023] (3) Dissolve 0.35g of potassium chloride and 0.20g of ferric chloride in dilute hydrochloric acid, add the mercury complex catalyst prepared in step (2) after clarification, soak at room temperature for 8 hours, and dry at 120°C for 8 hours to obtain the compound low Mercury complex catalyst.

Embodiment 2

[0025] (1) Dissolve 0.4072g (0.0015mol) of mercuric chloride in dilute hydrochloric acid, add it to 10g of activated carbon, impregnate at room temperature for 8 hours, and dry at 120°C for 8 hours to obtain a mercuric chloride catalyst.

[0026] (2) Dissolve 3.0g (0.0015mol) PEG2000 in dilute hydrochloric acid under stirring, add dropwise the mercuric chloride catalyst prepared in step (1) after clarification, impregnate at room temperature for 8 hours, and dry at 120°C for 8 hours to obtain mercury complex material catalyst.

[0027] (3) Dissolve 0.6820g of copper chloride in dilute hydrochloric acid, add the mercury complex catalyst prepared in step (2) after clarification, soak at room temperature for 8 hours, and dry at 120°C for 8 hours to obtain a compound low-mercury complex catalyst.

Embodiment 3

[0029] (1) Dissolve 0.3258g (0.0012mol) of mercuric chloride in dilute hydrochloric acid, add it to 10g of activated carbon, impregnate at room temperature for 8 hours, and dry at 120°C for 8 hours to obtain a mercuric chloride catalyst.

[0030] (2) Dissolve 1.3216g (0.006mol) of 15-crown-5 in dilute hydrochloric acid under stirring, add dropwise the mercuric chloride catalyst prepared in step (1) after clarification, impregnate at room temperature for 8 hours, and dry at 120°C for 8 hours. A mercury complex catalyst was obtained.

[0031] (3) Dissolve 0.12g of ferric chloride and 0.4089g of zinc chloride in dilute hydrochloric acid, add the mercury complex catalyst prepared in step (2) after clarification, immerse at room temperature for 8 hours, and dry at 120°C for 8 hours to obtain the compound low Mercury complex catalyst.

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Abstract

The invention discloses a compound low-mercury complex catalyst for synthesizing vinyl chloride and a preparation method thereof. The catalyst uses active carbon as a carrier, the active component is a complex formed by organic ligands and mercuric chloride, and the cocatalyst is one or more of potassium chloride, ferric chloride, zinc chloride and copper chloride. The catalyst uses polyethylene glycol or crown ether compounds as ligands to undergo a coordination reaction with mercury ions to form a stable ring complex, which anchors mercury ions in the pores of activated carbon and reduces the sublimation loss of mercury elements. . The invention adopts the step-by-step impregnation method, the preparation method is simple, the catalyst activity is high, and the stability is good.

Description

technical field [0001] The invention belongs to the technical field of catalysts, and in particular relates to a compound low-mercury complex catalyst for synthesizing vinyl chloride and a preparation method thereof. Background technique [0002] Vinyl chloride is an important raw material for organic synthesis, and its main use is to produce polyvinyl chloride. At present, there are two main methods for the synthesis of vinyl chloride: the acetylene method and the ethylene method. At present, most vinyl chloride monomers in my country are mainly produced by the acetylene process. [0003] At present, the acetylene method of vinyl chloride mostly uses activated carbon-supported mercuric chloride as a catalyst, and is carried out in a fixed-bed reactor, with a mercuric chloride loading of 10.5% to 12.5%. This kind of catalyst has a high mercury content, and its stability is very poor, it is easy to sublimate and lose, and its catalytic performance decays quickly. In recent...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J31/30C07C17/08C07C21/06
Inventor 孟纪文邵玉昌左洪亮林春迎
Owner DALIAN RES & DESIGN INST OF CHEM IND
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