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Preparation method used for synthesizing chloroethylene mercury-free catalyst

A mercury catalyst, vinyl chloride technology, applied in catalyst activation/preparation, chemical instruments and methods, physical/chemical process catalysts, etc., can solve problems such as increased preparation cost, and achieve the effects of good stability, long life and easy operation

Inactive Publication Date: 2018-10-16
QIDONG XIANGRUI CONSTR CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The modification and impregnation method of the carrier are important factors affecting the performance of mercury-free catalysts, but the modification method and impregnation method to produce the catalyst with the best activity are not necessarily the most suitable methods
Some people use various acid-base treatments and methods of doping the carrier with elements or groups to finally improve the activity of the catalyst; some people use auxiliary instruments such as ultrasonic waves to improve the effect of impregnation and dispersion, and finally improve the activity of the catalyst, but the preparation cost is greatly reduced. improve

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0013] A method for preparing a mercury-free catalyst for synthesizing vinyl chloride, comprising the following steps: ultrasonically cleaning the coal-based activated carbon with distilled water for 35 minutes, and drying for subsequent use; 25 parts of tin tetrachloride, 8 parts of copper chloride, 5 parts of trichloride Bismuth, 10 parts of barium chloride and 7 parts of cerium trichloride are dissolved in 95 parts of hydrogen chloride solution with a concentration of 0.1mol / L to prepare an impregnation solution, and then the impregnation solution is loaded on the above-mentioned treated activated carbon by equal volume impregnation method , transferred to a rotary evaporator for 6 hours at 62°C, evaporated to dryness, and finally dried in an oven at 102°C for 14 hours, then cooled to obtain the product; all raw materials are in parts by weight.

Embodiment 2

[0015] A method for preparing a mercury-free catalyst for synthesizing vinyl chloride, comprising the following steps: ultrasonically cleaning coal-based activated carbon with distilled water for 30 minutes, and drying for later use; 20 parts of tin tetrachloride, 7 parts of copper chloride, and 4 parts of trichloride Bismuth, 7 parts of barium chloride and 5 parts of cerium trichloride are dissolved in 90 parts of hydrogen chloride solution with a concentration of 0.1mol / L to prepare an impregnation solution, and then the impregnation solution is loaded on the above-mentioned treated activated carbon by equal volume impregnation method , transferred to a rotary evaporator at 60°C for 5.5 hours, evaporated to dryness, and finally dried in an oven at 100°C for 13 hours, then cooled to obtain the product; all raw materials are in parts by weight.

Embodiment 3

[0017] A method for preparing a mercury-free catalyst for synthesizing vinyl chloride, comprising the following steps: ultrasonically cleaning coal-based activated carbon with distilled water for 40 minutes, and drying for later use; 30 parts of tin tetrachloride, 9 parts of copper chloride, 6 parts of trichloride Bismuth, 13 parts of barium chloride and 10 parts of cerium trichloride are dissolved in 100 parts of hydrogen chloride solution with a concentration of 0.1mol / L to prepare an impregnation solution, and then the impregnation solution is loaded on the above-mentioned treated activated carbon by equal volume impregnation method , transferred to a rotary evaporator at 64°C for 6.5 hours, evaporated the water to dryness, and finally dried in an oven at 105°C for 15 hours, and cooled to obtain the product; all raw materials are in parts by weight.

[0018] The method is simple, fast and easy to operate, and the prepared mercury-free catalyst has good catalytic performance,...

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PUM

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Abstract

The present invention discloses a preparation method used for synthesizing a chloroethylene mercury-free catalyst. The preparation method comprises the following steps: coal-based activated carbon issubjected to ultrasonic washing with distilled water; the washed coal-based activated carbon is dried for standby application; tin tetrachloride, copper chloride, bismuth trichloride, barium chlorideand cerous chloride are dissolved in a hydrogen chloride solution to prepare impregnation liquid; then the impregnation liquid is loaded onto the above treated activated carbon by an equal volume impregnateon method; the treated materials are transferred to a rotary evaporator at 60-64 DEG C for a rotary evaporation for 5.5-6.5 h; water is basically evaporated; finally the materials are dried in an oven at 100-105 DEG C for 13-15 h; and the finished product is obtained by cooling. The method is simple, rapid and easy to operate. The prepared mercury-free catalyst has a good catalytic performance close to a level of mercury catalysts, and is also good in stability and long in service life.

Description

technical field [0001] The invention relates to a method for preparing a mercury-free catalyst for synthesizing vinyl chloride. Background technique [0002] At present, the domestic production of vinyl chloride mainly adopts the synthesis method of acetylene hydrochlorination catalyzed by mercury chloride. Because mercury chloride is highly toxic and easy to lose, it is less and less suitable for the production of vinyl chloride. Therefore, the development and research of mercury-free catalysts It is imperative. Mercury-free catalysts can be roughly divided into two types in terms of value: one is a noble metal mercury-free catalyst with gold, silver, and platinum group elements as the main active components; the other is a low-cost transition metal element as the main active component. Part of the non-noble metal mercury-free catalyst. From the number of components, it can be divided into single-component catalysts, two-component catalysts and multi-component catalysts. ...

Claims

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Application Information

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IPC IPC(8): B01J27/138B01J37/02
CPCB01J27/138B01J37/0201
Inventor 不公告发明人
Owner QIDONG XIANGRUI CONSTR CO LTD
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