Method for removing chlorine included in hydrogen chloride gas

Abstract

The invention, belonging to the field of chemical industry production, discloses a method for removing contained chlorine from a byproduct hydrogen chloride gas generated in the process of producing organic chlorides, comprising the following steps: carrying out reduction reaction upstream on a byproduct hydrogen chloride gas output by the process of producing organic chlorides and a purification solution in a packed tower to remove chlorine, and then conducting freeze drying to obtain a high-purity hydrogen chloride gas with the chlorine content of less than 1ppm. According to the invention, by using a ferrous chloride solution containing satuarated hydrogen chloride as the purification solution to remove chlorine from the hydrogen chloride gas with a chlorine content of less than 5%(v/v) to obtain chlorine, the advantages of simpleness, reliability, fast removing speed, and low energy consumption and cost of purification are achieved, and the method can effectively raise the application value of the byproduct hydrogen chloride gas, broaden the application range of the byproduct hydrogen chloride gas, and the like; and the method can be used for removing chlorine from a synthetic hydrogen chloride gas with a chlorine content of less than 5%(v/v and byproduct hydrogen chloride gases generated from other production processes.

Description

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AI Technical Summary

Benefits of technology

This patented technology uses an iron salt solution that contains dissolved sodium or lithocholor acid to remove impurities from gases produced during chemical reactions like producing dichloromethane. By reacting this soluble material with certain substances found on it, these contaminants become more easily separated out when they form crystals due to their ability to absorb water vapor at different temperatures. These technical effectings include efficient cleanup of harmful compounds such as chlorinating agents while improving productivity and reducing costs associated therewith.

Problems solved by technology

Technological Problem addressed in this patents relates to improving the efficiency and effectiveness of separating harmful gases like chloroform or dichlorophyllum nitrodes during manufacturing processes that require highly purity materials. Current methods involve multiple steps involving different types of equipment which result in increased costs due to their complexity and energy usage.