盐酸法粗磷酸中氯化钙的去除研究现状
收稿日期: 2020-02-14
网络出版日期: 2020-08-12
基金资助
中央引导地方科技发展专项资金项目：基于检测、研发和标准化服务的贵州省“化工云”平台建设(黔科中引地[2017]4010);贵州省青年科技人才培养计划：氟硅特种气体与气体标准物质研制(黔科合平台人才[2017]5621)
Removal of calcium chloride from crude phosphoric acid by hydrochloric acid method
Received date: 2020-02-14
Online published: 2020-08-12
王晓雄 , 张建刚 , 张文静 , 陈烨 . 盐酸法粗磷酸中氯化钙的去除研究现状[J]. 无机盐工业, 2020 , 52(8) : 17 -19 . DOI: 10.11962/1006-4990.2019-0461
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.
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