Method for removing metal ion impurities in aluminium chloride solution by multistage resin columns

A technology of resin column and aluminum chloride is applied in the field of multi-stage resin column processing aluminum chloride solution to remove iron, calcium and magnesium ions, and can solve the problems of inappropriate large-scale production, no impurity removal method, complicated process and the like, To achieve the effect of good impurity removal, easy control of production process and simple process
CN103288115AActive Publication Date: 2013-09-11CHINA SHENHUA ENERGY CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
CHINA SHENHUA ENERGY CO LTD
Publication Date
2013-09-11

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Abstract

The invention discloses a method for removing metal ion impurities in an aluminium chloride solution by multistage resin columns. The invention discloses a method for removing iron impurity ions, calcium impurity ions and magnesium impurity ions in the aluminium chloride solution. The method comprises the following steps of: adjusting the pH of the aluminium chloride solution to be 0.1-3.5, and then sequentially enabling the aluminium chloride solution to pass through a strong acid-type cation exchange resin column group and a chelate resin column group, wherein the cation exchange resin column group and the chelate resin column group comprise at least two stages respectively, and each stage comprises 1-4 parallel resin columns. The method disclosed by the invention is simple in process, easy to control production process, stable in product quality, good in impurity removal effect, and capable of adopting a high treatment flow speed, thus improving the production efficiency.
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Description

technical field

[0001] The invention relates to a method for treating aluminum chloride solution to remove metal ion impurities contained therein, in particular to a method for treating aluminum chloride solution by adopting a multistage resin column to remove iron, calcium and magnesium ions. Background technique

[0002] Aluminum chloride solution is an important liquid raw material for industrial production of polyaluminum chloride, basic aluminum chloride and crystalline aluminum chloride. In the process of industrial production of aluminum chloride solution, such as when the fly ash acid method is used to prepare alumina solution, due to the lack of purity of the fly ash raw material and equipment pollution, the prepared aluminum chloride solution usually contains a certain amount of Iron, calcium, magnesium and other impurities. When such aluminum chloride solution is used to prepare industrial products such as polyaluminum chloride, basic aluminum chloride or crystal...

Claims

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