Alumina sulfate without iron can be used in high-grade paper, superior fabrics, and food leavening agents.White rubber, white leather, and other products are in production. Currently, China's annual production capacity of ferric-free aluminum sulfate is around 1,500 tons, accounting for a small portion of the total aluminum sulfate production. Below, the editor introduces the ion exchange method for the preparation of ferric-free aluminum sulfate for your reference.
Chemical Separation Technique
2. Solvent Extraction Method
Ion Exchange Method
The chemical separation process is lengthy.High labor intensity, significant aluminum loss, and the difficulty in producing aluminum sulfate products with iron quality fractions below 0.005% are among the drawbacks. Extensive research on the extraction method has been conducted both domestically and internationally, with the main extractants used being amines, phosphines, and mixed extractant systems composed of both. Amines and phosphine extraction systems are characterized by long processes, high raffinate concentrations, and complex reverse extraction processes. While mixed extractant systems offer better performance than single extractant systems, their practicality and industrial value remain to be determined.
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