A method for dissolving a non-zwitterionic hydroxide with a base

By mixing polyhydroxycarboxylic acids and bases with metal hydroxides under alkaline conditions to form a solution containing metal ions, and then achieving reversible dissolution and precipitation through acid treatment, the problem of reversible dissolution of non-ampholytic hydroxides is solved, reducing reagent consumption and cost.

CN117181029BActive Publication Date: 2026-03-03QINGHAI INST OF SALT LAKES OF CHINESE ACAD OF SCI +1
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Filing Date
2023-09-21
Publication Date
2026-03-03

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Abstract

The application discloses a method for dissolving non-zwitterionic hydroxide by alkali. The method comprises the following steps: adding polyhydroxy carboxylic acid or polyhydroxy carboxylic acid salt and alkali into metal hydroxide, dissolving the metal hydroxide, obtaining a solution containing metal ions, and then adding acid into the solution containing metal ions to obtain the metal hydroxide. The method provided by the application realizes the reversibility of alkali dissolution and acid precipitation of non-zwitterionic hydroxide under alkaline conditions, and the method is simple in operation and low in cost and environmental protection.
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