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Composite metal salt catalyst for hydrochlorination reaction of acetylene

A composite metal salt, acetylene hydrochlorination technology, applied in physical/chemical process catalysts, organic chemistry, hydrogen halide addition preparation, etc. The effect of enhancing activity

Active Publication Date: 2012-08-15
TSINGHUA UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The gold content in this method is 1 times lower than the result reported by Huchings, but it is still too high to meet the cost requirements of industrialization

Method used

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  • Composite metal salt catalyst for hydrochlorination reaction of acetylene
  • Composite metal salt catalyst for hydrochlorination reaction of acetylene
  • Composite metal salt catalyst for hydrochlorination reaction of acetylene

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] A catalyst prepared with coconut shell charcoal as a carrier, chloroauric acid and cupric chloride as active component precursors, wherein the loading amount of gold is 0.25%. The micro-reaction evaluation conditions are as follows:

[0036] Reaction temperature: 180°C; Reaction pressure: normal pressure; Reaction space velocity: 1200h -1 (volume space velocity, acetylene metering); hydrogen chloride flow / acetylene flow=1.1:1.0. The conversion and selectivity of the catalyst are as follows figure 1 , Table 1 shows.

Embodiment 2

[0038] Coconut shell charcoal is used as a carrier, chloroauric acid and copper chloride are used as active component precursors, and cerium chloride is used as a catalyst prepared by adding auxiliary agents, wherein the loading amount of gold is 0.25%. The micro-reaction evaluation conditions are as follows:

[0039] Reaction temperature: 180°C; Reaction pressure: normal pressure; Reaction space velocity: 360h -1 (volume space velocity, acetylene metering); hydrogen chloride flow / acetylene flow=1.1:1.0. The conversion and selectivity of the catalyst are as follows figure 2 , Table 1 shows.

Embodiment 3

[0041]Carbon nanotubes are used as the carrier, chloroauric acid is used as the precursor of the active component, and the loading amount of Au is 0.10%. The micro-reaction evaluation conditions are as follows:

[0042] Reaction temperature: 180°C; Reaction pressure: normal pressure; Reaction space velocity: 1200h -1 (volume space velocity, acetylene metering); hydrogen chloride flow / acetylene flow=1.1:1.0. The conversion and selectivity of the catalyst are as follows image 3 , Table 1 shows.

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Abstract

The invention discloses a composite metal salt catalyst for a hydrochlorination reaction of acetylene, belonging to the technical field of catalysts. The composite metal salt catalyst takes gold as active metal, and the reduction deactivation of the composite metal salt catalyst is reduced by reducing reduction potential of metal through a complexing action of a thiocyanate radical or a cyanate radical. Carbon deposition in a reaction process is restrained by introducing one or more of potassium, cerium and lanthanum elements. The composite metal salt catalyst is loaded on active carbon or carbon nanometer pipe with the specific surface area of not less than 100m<2>*g<-1>, wherein the mass fraction of a gold load is 0.05-0.50%, the mass fraction of a copper load is 0.1-5.0%, and the mass fraction of the potassium / cerium / lanthanum load is 0.1-5.0%. In a reaction for preparing vinyl chloride, composite salt of gold and copper has excellent activity, selectivity and stability; furthermore, one or two of cerium and lanthanum are added to a catalyst so as to be capable of effectively restraining the carbon deposition and catalyzing a hydrochlorination process of the acetylene in low cost and high efficiency.

Description

technical field [0001] The invention belongs to the technical field of catalysts, in particular to a composite metal salt catalyst for acetylene hydrochlorination. Background technique [0002] Polyvinylchloride (PVC) is the second largest general-purpose resin in the world, and the synthesis of Vinyl Chloride Monomer (VCM) is the core part of the entire production process. [0003] There are two main ways to synthesize vinyl chloride: ethylene method and calcium carbide method. The current situation of resource distribution of "poor oil and rich coal" determines that my country's polyvinyl chloride mainly comes from coal routes, and more than 70% of China's existing PVC production is produced through the "carbide method". In the calcium carbide method, the monomer vinyl chloride of polyvinyl chloride is obtained by hydrochlorination of acetylene. Its main equations are as follows: [0004] [0005] CaC 2 +2H 2 O→C 2 h 2 ↑+Ca(OH) 2 [0006] [0007] [0008...

Claims

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Application Information

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IPC IPC(8): B01J27/24C07C21/06C07C17/08
Inventor 罗国华周凯王伟贾金超魏飞
Owner TSINGHUA UNIV
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