A method for separating and recovering aluminum, potassium and ammonium from a mixed solution containing aluminum sulfate, potassium sulfate and ammonium sulfate

A technology for separating, recovering and mixing solutions, which is applied in the fields of alkali metal sulfite/sulfite, chemical instruments and methods, ammonium sulfate, etc., and can solve the problems of unreasonable recovery and utilization of potassium and sodium, unsatisfactory precipitation efficiency, reagents, etc. Large consumption and other issues, to achieve efficient separation and recycling, improve resource utilization, and save the separation and recovery rate
CN110510648BActive Publication Date: 2021-01-01INST OF PROCESS ENG CHINESE ACAD OF SCI
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
INST OF PROCESS ENG CHINESE ACAD OF SCI
Publication Date
2021-01-01

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Abstract

The invention provides a method of separating and recovering aluminum, potassium, and ammonium from a mixed solution containing aluminum sulfate, potassium sulfate, and ammonium sulfate. The method comprises following steps: evaporating and condensing the mixed solution, cooling the condensate to carry out crystallization to obtain mixed crystals of potassium alum and ammonium alum, burning the mixed crystals at a high temperature to prepare alumina, and recovering potassium sulfate and ammonium sulfate at the same time. The provided method can efficiently recover aluminum, potassium, and ammonium, and obtains high purity alumina, potassium sulfate, and ammonium sulfate, furthermore, the energy consumption is low, the investment is little, the production is carried out in an enclosed environment, no waste solid, waste gas or wastewater is discharged, the devices are easy to enlarge, and the industrial application prospect is good.
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Description

technical field

[0001] The invention relates to the field of separation and recovery, in particular to a method for separating and recovering aluminum, potassium and ammonium from a mixed solution containing aluminum sulfate, potassium sulfate and ammonium sulfate. Background technique

[0002] The separation and recovery of metal ion-containing solutions is not only a difficult problem in industrial wastewater treatment, but also the key to improving product quality, purity and reducing wastewater discharge in mineral leaching, hydrometallurgy and other fields. Moreover, the mixed solution containing aluminum sulfate, potassium sulfate and ammonium sulfate is a common intermediate solution or waste water in industry, such as the waste water produced by active clay, the vanadium precipitation waste water and the process liquid in the comprehensive utilization of potassium feldspar. At present, the methods for removing metal ions are mostly precipitation method, living body p...

Claims

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