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Low-mercury catalyst for synthesizing vinyl chloride

A low-mercury catalyst and vinyl chloride technology, which is applied in hydrogen halide addition preparation, metal/metal oxide/metal hydroxide catalyst, organic chemistry, etc., can solve problems such as unsatisfactory requirements and high mercury chloride content, and achieve The effect of reducing production costs and reducing resource consumption

Inactive Publication Date: 2012-06-13
SHAANXI BEIYUAN CHEM GROUP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The inventor of this patent has previously applied for a patent: mercuric chloride low-mercury catalyst and its preparation method, patent application number 200910102437, which uses activated carbon as a carrier to adsorb mercuric chloride, and the mercuric chloride in the catalyst formula is 8.0% to 10.0%. Its mercuric chloride content is still high and cannot meet the requirements

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0014] Embodiment 1 of the present invention: according to the following proportioning, HgCl 2 : 3.5%; BiCl 3 : 3%; ZnCl 2 : 4%; TiCl 4 : 3.5%; CuCl 2 : 3%; VCl 3 : 4.5%; rare earth chloride: 4.4%; BaCl 2 6%; the remainder is C. C choose activated carbon. BiCl 3 , ZnCl 2 、TiCl 4 , CuCl 2 , VCl 3 , BaCl and rare earth chloride were dissolved, and then the activated carbon (C) soaked in hydrochloric acid solution at low temperature was added to the dissolved saturated solution; after heating to 50°C and impregnated for 24 hours, the impregnated activated carbon was put into 2 Continue to immerse in the solution for 8 hours, take it out, and continue drying after low-temperature pre-drying to obtain the product.

[0015] After testing, the reasonable range of the ratio is as follows, by weight, HgCl 2 : 2.5~3.5%; BiCl 3 : 0.1~12.5%; ZnCl 2 : 0.15~15%; TiCl 4 : 0.1~7.00%; CuCl 2 : 2.75~3.25%; VCl 3 : 0.3~8.3%; rare earth chloride: 0.3~8.3%; BaCl 2 3-8.5%; C: 62....

Embodiment 2

[0016] Embodiment 2 of the present invention: according to the following proportioning, HgCl 2 : 3.5%; BiCl 3 : 0.1%; ZnCl 2 : 0.15%; TiCl 4 : 0.1%; CuCl 2 : 3.25%; VCl 3 : 8.3%; rare earth chloride: 8.3%; BaCl 2 8.5%; the remainder is C. BiCl 3 , ZnCl 2 、TiCl 4 dissolved in BiCl-containing 3 , ZnCl 2 、TiCl 4 Add activated carbon soaked in hydrochloric acid solution to the saturated solution at low temperature; heat to 50°C and soak for 12 hours, put the soaked activated carbon into the solution containing CuCl 2 , VCl 3 , BaCl 2 And in the solution of rare earth chloride, control the temperature at 50°C and continue to impregnate for 12 hours to take it out, and then put the impregnated product activated carbon into the solution containing 3.5% HgCl 2 Immerse in the solution for 8 hours, take out the low-temperature pre-drying and continue drying to obtain the product. The rare earth chloride is lanthanum chloride.

Embodiment 3

[0017] Embodiment 3 of the present invention: the optimal proportion is, by weight, by weight, comprising the following ingredients: HgCl 2 : 3.5%; BiCl 3 : 3%; ZnCl 2 : 4%; TiCl 4 : 3%; CuCl 2 : 3%; VCl 3 : 4%; rare earth chloride: 4%; BaCl 2 4%; the remainder is C. BiCl 3 , ZnCl 2 Add activated carbon soaked in low temperature hydrochloric acid solution to the saturated solution of hydrochloric acid; after heating to 50°C for 8 hours, put the impregnated activated carbon into the TiCl-containing 4 , CuCl 2 Continue to impregnate in the saturated solution of 8 hours, control the temperature at 50°C, and then put the impregnated activated carbon into the VCl-containing 3 , BaCl2 Immerse it in the solution of rare earth chloride and rare earth chloride for 8 hours and take it out. At this stage, the temperature is still controlled at 50°C, and then it is placed in a solution containing 3% HgCl 2 Soak in the solution for 8 hours, take it out, pre-dry it at low temperat...

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Abstract

The invention relates to a low-mercury catalyst for synthesizing vinyl chloride. The catalyst is characterized by comprising the following components, by weight: 2.5-3.5% of HgCl2; 0.1-12.5% of BiCl3; 0.15-15% of ZnCl2; 0.1-7.00% of TiCl4; 2.75-3.25% of CuCl2; 0.3-8.3% of VCl3; 0.3-8.3% of rare earth chloride; 3-8.5% of BaCl2; and 62.5-75% of C. In the invention, BiCl3, ZnCl2, TiCl4, CuCl2, VCl3, as well as BaCl2 that are cheap and has catalytic performance and rare earth chloride are employed to substitute part of HgCl2 for preparing the low-mercury catalyst, the HgCl2 content of which can be reduced to less than 3.5% while the catalytic performance is fully guaranteed. Thus, not only is the energy consumption reduced, but the product cost of the catalyst is also lowered. Prepared by a step impregnation method, the low-mercury catalyst in the invention is characterized by simple process, effectiveness, energy saving, environmental protection, and convenient operation, and simultaneously can overcome problems existing in prior art, thus being suitable for the second-stage process of vinyl chloride synthesis.

Description

technical field [0001] The invention relates to a preparation method of a low-mercury catalyst for synthesizing vinyl chloride, belonging to the technical field of synthesizing vinyl chloride. Background technique [0002] Mercury pollution is a serious global environmental problem. The call for an international ban on mercury is getting louder and louder. my country's annual mercury consumption accounts for 30% to 40% of the world's total, and the mercury consumption of calcium carbide polyvinyl chloride accounts for 60% of the national mercury consumption. At present, there are 104 PVC production enterprises in my country, with a total production capacity of 17.81 million tons, of which 94 are based on calcium carbide method, with a production capacity of 13.62 million tons, accounting for 76.5% of the total production capacity. In 2009, the total output of polyvinyl chloride in my country was 9.15 million tons, of which the output of calcium carbide polyvinyl chloride w...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/847C07C21/06C07C17/08
Inventor 陈肖虎王凤君王良栋张雄堂徐生智唐晓宁李武斌曾英陈明慧朱瑞陈庆高珊珊
Owner SHAANXI BEIYUAN CHEM GROUP
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