Method and system for resolving hydrogen chloride from solution containing hydrogen chloride

Abstract

The invention provides a method and system for resolving hydrogen chloride from a solution containing the hydrogen chloride. The method comprises the following steps: taking magnesium chloride as a resolving medium and resolving the hydrogen chloride from the solution containing the hydrogen chloride. According to the method provided by the invention, the magnesium chloride is used as the resolving medium to carry out deep resolving on waste hydrochloric acid, and the resolving rate is high; the concentration of the hydrogen chloride in a resolved residual solution is 2 percent or lower. According to the technology, other reagents do not need to be additionally added, the operation elasticity is great and the energy source recycling and utilization rate is high; dry spot and crystallization phenomena in a conventional resolving technology can be effectively avoided; a whole technological process has zero pollution and zero emission, and clean production is really realized; the technology has profound significance on application and popularization of a hydrogen chloride resolving technology in China, even the whole world, and is a novel technology with salt lake characteristics.

Description

technical field [0001] The invention relates to the technical field of analysis technology, in particular to a technology for analysis of hydrogen chloride gas. Background technique [0002] The Salt Lake Group is located in the Chaerhan Salt Lake in the Qaidam Basin, which is known as the "cornucopia". The magnesium chloride reserves are 4.06 billion tons, accounting for more than 90% of the national reserves and 40% of the global reserves. In the symbiotic resources of Chaerhan Salt Lake, high-purity bischofite (MgC1 2 ·6H 2 O). The production process of high-purity anhydrous magnesium chloride needs to carry out industrial dehydration of bischofite, but because bischofite is difficult to remove the last two water molecules in the dehydration process, and it is very easy to hydrolyze into MgOHCl, so the last two Crystal water needs to be completely removed under the protection atmosphere of hydrogen chloride, so the atmosphere of hydrogen chloride is the key to ensure t...

AI Technical Summary

Problems solved by technology

If the traditional calcium chloride method is used for in-depth analysis of waste hydrochloric acid, the magnesium chloride impurities in the waste hydrochloric acid will cause calcium chloride pollution, and calcium chloride needs to be replaced frequently during the treatment process, resulting in high production costs

In addition, the analysis technology using calcium chloride as the analysis medium has problems such as high energy consumption, high operating temperature, inability to analyze in depth, small operating flexibility, large discharge of dilute acid, and high environmental pressure. Therefore, it is necessary to develop an easy-to-operate , cost-saving, and energy-efficient methods to conduct in-depth analysis of waste hydrochloric acid containing magnesium chloride to produce hydrogen chloride gas

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