Non-mercury catalyst for acetylene hydrochlorination and method of preparing the same

A non-mercury catalyst, acetylene hydrochlorination technology, applied in the direction of physical/chemical process catalysts, hydrogen halide addition preparation, chemical instruments and methods, etc., can solve the problems of short activity period, catalyst deactivation, low activity, etc., to achieve High selectivity, simple preparation method, and non-toxic active ingredients

Inactive Publication Date: 2008-08-27
SICHUAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Deng Guocai of Nankai University and others have studied a non-mercury catalyst with stannous chloride as the main active component, which has the advantages of low reaction temperature, high activity, and good selectivity, but its active components are easy to lose, resulting in catalyst deactivation; The research on the synthesis of non-mercury catalysts for vinyl chloride began as early as the 1980s. Since the PVC industry has gradually turned to ethylene as a raw material for the production of vinyl chloride monomers, the research on thi

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0023] Example 1

[0024] 0.08 g of platinum chloride, 0.16 g of bismuth chloride, and 0.08 g of cerium chloride are dissolved in hydrochloric acid with a concentration of 2 mol / L, and the concentration of platinum chloride is 0.01 mol / L. Add the prepared impregnation solution to 16g of activated carbon carrier and impregnate for 5 hours at room temperature. Evaporate the moisture on a water bath at a temperature of 80°C, and dry the surface moisture in a room temperature oven at a temperature of 70°C for 2 hours. Then it was calcined in a muffle furnace at a temperature of 120°C for 12 hours, and then taken out and cooled for later use. In the reaction of the addition of hydrogen chloride to acetylene to produce vinyl chloride, the molar ratio of the reaction gas is C 2 H 2 / HCl=1 / 1.15, space velocity 500ml / (g.cata)·h -1 , The reaction was carried out at a reaction temperature of 110°C. The amount of catalyst is 16g, and the hydrogen chloride activation time is 0.5h. Analyzing th...

Example Embodiment

[0025] Example 2

[0026] 0.16 g of palladium chloride, 0.48 g of cuprous chloride, and 1.6 g of cerium chloride are dissolved in hydrochloric acid with a concentration of 3 mol / L, and the concentration of palladium chloride is 0.015 mol / L. Add the prepared impregnation solution to 16g of activated carbon carrier and impregnate for 5 hours at room temperature. Evaporate the moisture on a water bath at a temperature of 100°C, and dry the surface moisture in a room temperature oven at a temperature of 80°C for 3 hours. Then it was calcined in a muffle furnace at 140°C for 6 hours, then taken out and cooled for later use. In the reaction of the addition of hydrogen chloride to acetylene to produce vinyl chloride, the molar ratio of the reaction gas is C 2 H 2 / HCl=1 / 1.25, space velocity 500ml / (g.cata)·h -1 , The reaction was carried out at a reaction temperature of 120°C. The amount of catalyst is 16g, and the hydrogen chloride activation time is 1h. Analyzing the reaction tail gas, ...

Example Embodiment

[0027] Example 3

[0028] 0.08 g of gold chloride and 0.8 g of cuprous chloride are dissolved in 2.5 mol / L hydrochloric acid, and the gold chloride concentration is 0.03 mol / L. Add the prepared impregnation solution to 16g of activated carbon carrier and impregnate for 10 hours at room temperature. Evaporate the moisture on a water bath at a temperature of 80°C, and dry the surface moisture for 3.5 hours in a room temperature oven at a temperature of 70°C. Then it was calcined in a muffle furnace at a temperature of 130°C for 8 hours, and then taken out and cooled for later use. In the reaction of the addition of hydrogen chloride to acetylene to produce vinyl chloride, the molar ratio of the reaction gas is C 2 H 2 / HCl=1 / 1.25, space velocity 1000ml / (g.cata)·h -1 , The reaction was carried out at a reaction temperature of 140°C. The amount of catalyst is 16g, and the hydrogen chloride activation time is 2h. The reaction tail gas is analyzed, and the conversion rate of acetylene i...

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Abstract

The invention discloses a non-mercury catalyst used in the acetylene hydrochlorination and preparation method thereof. The method includes the following steps: (1) dissolving noble metal chloride 0.5-3 parts by weight and base metal chloride 1-10 parts by weight into 2-4 mol/L hydrochloric acid solution to obtain a 0.01-0.05mol/L noble metal chloride solution; (2) adding the activated carbon 100 parts by weight into the solution at room temperature for 5-12 hours; (3) evaporating the immersion liquid on the activated carbon at 80-100 DEG C, drying at 70-80 DEG C for 2-4 hours and calcining at 120-140 DEG C for 4-12 hours; (4) and activating in hydrogen chloride atmosphere for 0.5-3 hours. The inventive catalyst can be used for green synthesis of vinyl chloride monomer to reach a conversion rate of acetylene up to 95-98% and selectivity of vinyl chloride greater than 99%.

Description

technical field [0001] The invention relates to a non-mercury catalyst which can be used for acetylene hydrochlorination and a preparation method thereof, and belongs to the field of catalysts in organic synthesis and the preparation thereof. Background technique [0002] Vinyl chloride monomer is an important raw material for organic chemical synthesis. The main use of vinyl chloride monomer is to produce polyvinyl chloride and vinyl chloride copolymer, which is one of the main raw materials of modern plastic products, of which about 65% are used for polyvinyl chloride plastic building materials, 8% are used for plastic packaging materials, 7 % for electronic and electrical products, 5% for plastic furniture and home decorations, 4% for civilian consumer goods, and 11% for other plastic products, such as various coatings and adhesives. In the pharmaceutical industry, vinyl chloride is used as an intermediate in the production of chloroacetaldehyde and sulfa drugs. Vinyl c...

Claims

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Application Information

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IPC IPC(8): B01J27/13B01J27/122C07C17/08C07C21/06
Inventor 蒋文伟杨琴罗芩李晶晶
Owner SICHUAN UNIV
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