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Crude vinyl chloride gas mercury removal adsorbent

A crude vinyl chloride and adsorbent technology, used in gas treatment, silicate, inorganic chemistry, etc., can solve the problems of low adsorption rate, poor stability, unable to meet the requirements of high-performance PVC production, and achieve high selectivity. , strong stability, good activity effect

Inactive Publication Date: 2020-08-25
XINJIANG CORPS MODERN GREEN CHLOR ALKALI CHEM ENG RES CENT LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Crude vinyl chloride gas contains HCl acidic corrosive gas, C 2 h 2 and H 2 Reducing gas, and after purification, it will be product gas. The introduction of other impurity components should be avoided during the mercury removal process. Therefore, the above technology has poor stability and low adsorption rate after being used in crude vinyl chloride gas, and cannot meet the requirements of high-performance polymers. Vinyl Chloride Production Requirements

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0014] A mercury-removing adsorbent for crude vinyl chloride gas, including activated carbon, zirconium nitrate, and copper bromide, specifically as follows: weigh 8.00 g of zirconium nitrate, dissolve it in deionized water to prepare a solution; weigh 30.00 g of activated carbon, pour it into the prepared in the zirconium nitrate solution. Evaporate to dryness in a water bath at 60°C and dry at 105°C. Roasting at 300°C for 3 hours in a nitrogen-protected atmosphere, and cooling to obtain the precursor of the mercury removal agent. Weigh 3.00 g of copper bromide and dissolve it in deionized water to prepare a solution. The precursor of the mercury removal agent is poured into the prepared copper bromide solution, filtered, and dried to obtain the mercury removal adsorbent.

Embodiment 2

[0016] A kind of mercury-removing adsorbent for crude vinyl chloride gas, comprising silicon dioxide, zirconium nitrate, cerium nitrate, manganese chloride, specifically as follows: each 5.00g of zirconium nitrate and cerium nitrate is weighed, dissolved in deionized water to prepare a solution; Take 35.00g of silicon dioxide, pour it into the prepared mixed solution of zirconium nitrate and cerium nitrate, filter, dry, roast at 350°C for 3 hours under nitrogen protection atmosphere, and cool to obtain the mercury removal agent precursor. Weigh 1.00 g of manganese chloride and dissolve it in deionized water to prepare a solution. The precursor of the mercury removal agent is poured into the prepared manganese chloride solution, filtered, and dried to obtain the mercury removal adsorbent.

Embodiment 3

[0018] A kind of mercury-removing adsorbent for crude vinyl chloride gas, comprising zeolite, cerium nitrate, cupric chloride, manganese chloride, specifically as follows: take cerium nitrate 3.00g, be dissolved in deionized water and be mixed with solution; Take zeolite 30.00g, Pour it into the prepared cerium nitrate solution, filter, dry, roast at 350°C for 2 hours in a nitrogen-protected atmosphere, and cool to obtain the precursor of the mercury removal agent. Weigh 2.00 g each of copper chloride and manganese chloride, and dissolve them in deionized water to prepare a solution. The precursor of the mercury removal agent is poured into the prepared mixed solution of copper chloride and manganese chloride, filtered, and dried to obtain the mercury removal adsorbent.

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PUM

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Abstract

The invention provides a crude vinyl chloride gas mercury removal adsorbent, in particular to a mercury removal adsorbent suitable for acetylene hydrochlorination reaction to synthesize crude vinyl chloride gas; the adsorbent carrier is at least one of activated carbon, silicon dioxide and zeolite; a hydrochloric acid-insoluble or hydrochloric acid-insoluble metal oxide as a first active component, and a metal halide as a second active component. A mercury removal adsorbent precursor is prepared by roasting a soluble salt impregnated carrier of metals Zr, Ti, W and Ce and loading a first active component, and soluble halide salts of metals Mn, Fe, Ni, Cu and Zn are continuously impregnated and loaded to the mercury removal adsorbent precursor to prepare the mercury removal adsorbent. The mercury removal adsorbent prepared by the invention has dual functions of adsorbing mercury by the carrier and fixing mercury by the active component, and is high in mercury removal efficiency, large in adsorption capacity and simple in production process.

Description

technical field [0001] The invention relates to the field of chemical manufacturing, in particular to an adsorbent for removing mercury from crude vinyl chloride gas. Background technique [0002] Polyvinyl chloride is one of the five major synthetic resins in the world, widely used in important areas of the national economy such as industry, agriculture, and building materials. Vinyl chloride monomer is an important raw material for organic chemical synthesis. Its main purpose is to produce polyvinyl chloride resin and other vinyl chloride copolymers. With the development of social economy, its demand is increasing day by day. The sources of vinyl chloride mainly include calcium carbide acetylene method, petroleum ethylene method and dichloroethane cracking method. my country's energy structure of "short of oil, poor in gas, and rich in coal" determines that the production of polyvinyl chloride by calcium carbide acetylene has become the mainstream. [0003] Mercury catal...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/20B01J20/10B01J20/16B01D53/02
CPCB01D53/02B01D2257/602B01J20/027B01J20/06B01J20/103B01J20/16B01J20/20
Inventor 王小艳庞晓东宋晓玲张学鲁李静王伟周佳
Owner XINJIANG CORPS MODERN GREEN CHLOR ALKALI CHEM ENG RES CENT LTD