硫酸提浓技术在化工生产过程中的应用

Application of Sulphuric Acid Concentration Technology in Chemical Production Process

烧碱工业生产过程中,由电解工序生产氯气,在进入氯化氢合成工序前,氯气必须经过干燥,氯气干燥工序采用93%的浓硫酸作为氯气干燥剂。浓度93%的浓硫酸在氯气干燥工序过程中吸收来自电解工序的含水氯气中的水分,浓度降低至75%。通过硫酸提浓技术,可将75%的硫酸进行提浓,浓度由75%再次提高至93%,实现浓硫酸在烧碱工业生产过程中的循环利用。

In the process of caustic soda industrial production, chlorine gas is produced by the electrolysis process. Before entering the hydrogen chloride synthesis process, chlorine must be dried and 93 % concentrated sulfuric acid is used as a chlorine desiccant in the drying process of chlorine gas. Concentrated sulfuric acid with 93 % concentration absorbs the moisture content in the aqueous chlorine gas from the electrolysis process in the chlorine drying process, and the concentration of the sulfuric acid decreases to 75 %. Through the sulfuric acid extraction technology, 75 % sulfuric acid can be concentrated, and the concentration is increased from 75 % to 93 %, so as to realize the recycling of concentrated sulfuric acid in the production process of caustic soda industry.