盐酸法粗磷酸中氯化钙的去除研究现状

doi:10.11962/1006-4990.2019-0461

Abstract

Abstract:

Phosphoric acid is an important raw material of chemical industry,which is widely used in many fields.The traditional sulfuric acid process will produce a large amount of phosphogypsum. The utilization of phosphogypsum is lack of mature technology and low utilization rate. It is easy to cause environmental pollution and bring cost pressure to enterprises. More- over,the sulfuric acid process has certain requirements for the grade of phosphate rock.Compared with sulfuric acid process,the hydrochloric acid method has unique advantages. The main components of crude phosphoric acid by hydrochloric acid method are phosphoric acid and calcium chloride. The removal technology and comprehensive utilization for calcium chloride are the key factors hindering the large-scale industrial application of hydrochloric acid method. The removal technologies for calcium chloride, such as melamine method,ion exchange method,liquid membrane method and the present situation of comprehensive utilization of calcium chloride waste liquor were introduced respectively. Aiming at the problems existing in the hydrochloric acid process,some suggestions were put forward. It was pointed out that economic and efficient removal of calcium chloride from crude phosphoric acid by hydrochloric acid process and its effective utilization are the key to the popularization and application of wet process phosphoric acid by hydrochloric acid method.

Key words: hydrochloric acid method, wet-process phosphoric acid, calcium chloride

CLC Number:

TQ132.32

Wang Xiaoxiong,Zhang Jiangang,Zhang Wenjing,Chen Ye. Removal of calcium chloride from crude phosphoric acid by hydrochloric acid method[J]. Inorganic Chemicals Industry, 2020, 52(8): 17-19.

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National Inorganic Salts Information Center

Inorganic Acid-Base-Salt Committee of CIESC

Removal of calcium chloride from crude phosphoric acid by hydrochloric acid method

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