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Low-mercury catalyst used for synthesizing vinyl chloride

A low-mercury catalyst and vinyl chloride technology, which is applied in the direction of physical/chemical process catalysts, hydrogen halide addition preparation, chemical instruments and methods, etc., can solve the problems of catalyst activity and stability reduction, environmental pollution, high consumption of mercury chloride, etc. problem, to achieve high catalytic activity and stability

Inactive Publication Date: 2013-03-13
DALIAN RES & DESIGN INST OF CHEM IND
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the low-mercury catalysts publicly reported in China all use common metal elements such as cobalt, bismuth, copper, manganese, nickel, and rare earth as cocatalysts to improve the performance of the catalyst, but the catalyst activity and stability are reduced to varying degrees. There is a certain gap with high-mercury catalysts, and the content of mercury chloride is between 3% and 9%. There are still problems of large consumption of mercury chloride and serious environmental pollution.

Method used

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  • Low-mercury catalyst used for synthesizing vinyl chloride
  • Low-mercury catalyst used for synthesizing vinyl chloride
  • Low-mercury catalyst used for synthesizing vinyl chloride

Examples

Experimental program
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Effect test

Embodiment 1

[0030] Soak 10g of activated carbon in 1% sodium hypochlorite at room temperature for 2h, filter, wash with deionized water several times until the filtrate is neutral, and dry at 120°C for 8h for later use. 0.2g mercuric chloride, 0.0029g H 2 PtCl 6 ·6H 2 O, 0.9654g FeCl 3 ·6H 2 O was dissolved in 15ml of deionized water, added dropwise into the pretreated activated carbon after clarification, soaked at room temperature for 4 hours, and dried at 120°C for 8 hours for later use.

Embodiment 2

[0032] Soak 10g of activated carbon with 1% calcium hypochlorite at room temperature for 2h, filter, wash with deionized water several times until the filtrate is neutral, and dry at 120°C for 8h for later use. 0.05g mercuric chloride, 0.0128g RhCl 3 ·3H 2 O, 0.6253 gZnCl 2 Dissolve in 15ml of deionized water, add dropwise into the pretreated activated carbon after clarification, soak at room temperature for 4 hours, and dry at 120°C for 8 hours for later use.

Embodiment 3

[0034] Soak 10g of activated carbon with 1% hypochlorous acid at room temperature for 2h, filter, wash with deionized water several times until the filtrate is neutral, and dry at 120°C for 8h for later use. 0.1g mercuric chloride, 0.0042g HAuCl 4 4H 2 O, 0.2685g CuCl 2 2H 2 O was dissolved in 15ml of deionized water, added dropwise into the pretreated activated carbon after clarification, soaked at room temperature for 4 hours, and dried at 120°C for 8 hours for later use.

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Abstract

The invention discloses a low-mercury catalyst used for synthesizing vinyl chloride. The low-mercury catalyst takes mercuric chloride as a main active component, one or more of precious metals such as Au, Pd, Pt, Ru, Rh, Os and Ir salts or complexes thereof as active regulators, and one or more of potassium chloride, ferric chloride, zinc chloride and copper chloride as cocatalysts. By adding trace amount of precious metal salt into the mercuric chloride, the low-mercury catalyst forms a stable composite metal compound, plays a role in fixing and activating mercuric chloride, and still maintains very high catalytic activity and stability when the load capacity of the mercuric chloride is reduced to 0.1-2%.

Description

[0001] technical field [0002] The invention belongs to the technical field of catalysts, in particular to a low-mercury catalyst for synthesizing vinyl chloride. [0003] Background technique [0004] 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. [0005] At present, the acetylene method of vinyl chloride mostly uses activated carbon-loaded mercuric chloride as a catalyst in a fixed-bed reactor, and the mercuric chloride loading is 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. With the depletion of mercury resources in my country and the world's emph...

Claims

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Application Information

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IPC IPC(8): B01J27/138C07C21/06C07C17/08
Inventor 孟纪文邵玉昌左洪亮吴井龙
Owner DALIAN RES & DESIGN INST OF CHEM IND
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