Non-noble metal mercury-free catalyst for hydrochlorination of acetylene and preparation method thereof

A technology of acetylene hydrochlorination and non-precious metals, applied in the direction of physical/chemical process catalysts, hydrogen halide addition preparation, chemical instruments and methods, etc., can solve problems such as mercury pollution, achieve low cost, reduce harm, and increase use The effect of longevity

Inactive Publication Date: 2013-04-03
TIANJIN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to overcome the shortcomings and deficiencies of the prior art, provide a non-precious metal mercury-free catalyst for acetylene hydrochlorination and its preparation method, and solve the problem of mercury pollution in the process of producing vinyl chloride by acetylene method under relatively economical conditions

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] 0.27g CuCl 2 2H 2 O and 0.72 g MnCl 2 4H 2 O was dissolved in 6ml of 2% hydrochloric acid to prepare an impregnating solution, which was added to 5g of activated carbon, sealed and impregnated at 70°C for 15h, and quickly dried at 140°C for 6h to obtain the desired catalyst.

[0026] The reaction conditions are hydrogen chloride activation 40min, acetylene space velocity 180h -1 , the reaction temperature is 140°C, the raw material ratio n (C 2 h 2 ) / n(HC1)=1:1.1. The catalyst catalyzes the hydrochlorination of acetylene under the above conditions, and the conversion rate of acetylene is 17%, and the selectivity of vinyl chloride is greater than 96%.

Embodiment 2

[0028] 0.54g CuCl 2 2H 2 O and 0.4 g CoCl 2 ·6H 2 O was dissolved in 6ml of water to prepare an impregnating liquid, which was added to 5 g of activated carbon, sealed and impregnated at 70 °C for 15 h, and quickly dried at 140 °C for 6 h to obtain the desired catalyst.

[0029] The reaction conditions are hydrogen chloride activation 40min, acetylene space velocity 180h -1 , the reaction temperature is 140°C, the raw material ratio n (C 2 h 2 ) / n(HC1)=1:1.1. The catalyst catalyzes the hydrochlorination of acetylene under the above conditions, and the conversion rate of acetylene is 29%, and the selectivity of vinyl chloride is greater than 97%.

Embodiment 3

[0031] 0.53g CuCl 2 2H 2 O and 0.21g ZnCl 2 Dissolve in 6ml of 30% hydrochloric acid to prepare the impregnating solution, add the impregnating solution to 5g of activated carbon, ultrasonicate for 3min, seal and impregnate at 70°C for 15h, and quickly dry at 140°C for 6h to obtain the required catalyst.

[0032] The reaction conditions are hydrogen chloride activation 40min, acetylene space velocity 180h -1 , the reaction temperature is 140°C, the raw material ratio n (C 2 h 2 ) / n(HC1)=1:1.1. The catalyst catalyzes acetylene hydrochlorination reaction under the above conditions, and the conversion rate of acetylene obtained is 42%, and the selectivity of vinyl chloride is greater than 99%.

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Abstract

The invention discloses a non-noble metal mercury-free catalyst for hydrochlorination of acetylene and a preparation method thereof. The catalyst mainly contains copper, chlorine, a carrier and the balance of catalysis-promoting metallic elements, wherein the copper exists in the form of copper chloride, the chlorine exists in the form of an inorganic salt of chlorine, the carrier is activated carbon or nitrided activated carbon which is subjected to acid cleaning, and the catalysis-promoting metallic elements are one of or a mixture of any of alkali metals, alkaline-earth metals and non-noble metals of which the chloride is non-volatile in transition metallic elements. The preparation method comprises the process steps of preparing impregnation motor liquor, adding a catalyst carrier to perform equivalent-volume impregnation, drying the mixture and the like. The non-noble metal mercury-free catalyst prepared by adopting the method is better in activity, high in selectivity, long in service life, low in cost and environment-friendly, and can be used for hydrochlorination of acetylene during the production of vinyl chloride by using a calcium carbide method.

Description

technical field [0001] The invention relates to a catalyst for organic synthesis, in particular to a non-noble metal mercury-free catalyst which can be used for acetylene hydrochlorination and a preparation method thereof. Background technique [0002] At present, due to the superior performance and versatility of polyvinyl chloride, its demand is also increasing day by day, making the production of vinyl chloride monomer also increase year by year. The synthesis methods of vinyl chloride monomer mainly include ethylene method and acetylene method. Based on the shortage of petroleum resources and the relative abundance of coal resources in my country, the production of vinyl chloride by acetylene has always occupied a dominant position in the domestic market. This method uses mercuric chloride catalyst as catalyst, but mercuric chloride is easy to volatilize and lose, and the liquid mercury metal reduced in the reaction will also be lost. According to statistics, in 2010, ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J27/138B01J27/128B01J27/122B01J27/132C07C21/06C07C17/08
Inventor 王富民王录王利锋
Owner TIANJIN UNIV
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