Hydrogen chloride gas purification method

Abstract

The invention provides a hydrogen chloride gas purification method which includes the steps: (1) contacting hydrogen chloride gas to be treated with modified mesoporous adsorbents at the temperature ranging from 50 DEG C to 200 DEG C, and removing hydrogen sulfide to obtain hydrogen chloride gas after removing the hydrogen sulfide; (2) performing catalytic oxidation for the hydrogen chloride gas after removing the hydrogen sulfide obtained in the step (1) by catalyst loading manganese zeolite, removing organic matters, and removing water and CO2 by adsorbents to prepare the hydrogen chloride gas. According to the purification method, hydrogen sulfide components in the hydrogen chloride gas are removed by the aid of the modified mesoporous adsorbents, the hydrogen chloride gas after removing the hydrogen sulfide is catalyzed and oxidized by the aid of the catalyst loading the manganese zeolite, the organic matters in the hydrogen chloride gas after removing the hydrogen sulfide are removed, high-purity hydrogen chloride gas can be obtained, the whole purification process is simple to operate, and the purification method is easily and massively applied in industries.

Description

technical field

[0001] The invention belongs to the field of waste gas treatment, and relates to a method for purifying hydrogen chloride gas, in particular to a method for purifying hydrogen chloride gas containing hydrogen sulfide and organic matter. Background technique

[0002] With the development of the chemical industry and the improvement of human living standards, people pay more and more attention to the treatment of organic pollutants. The existence of organic pollutants will affect the quality of subsequent products and reduce the purity of products; in addition, the volatilization of organic pollutants is the culprit of photochemical smog in addition to toxicity or stench.

[0003] In the production process of organic matter (such as phosphazene compounds, halogen-free flame retardants and methyl chloride, etc.), a large amount of hydrogen chloride gas is often produced, and these hydrogen chloride gases are also mixed with many other gas impurities, such as hyd...