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Method for preparing potassium formate by membrane method

A potassium formate and membrane technology, applied in the chemical industry, can solve problems such as environmental pollution, and achieve the effects of low cost, easy reaction process and high product purity

Active Publication Date: 2018-02-09
BEIJING NEWBIOLINK TECH DEV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The product obtained by this method has high purity, but it is easy to cause environmental pollution due to the use of organic solvents formaldehyde and isobutyraldehyde

Method used

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  • Method for preparing potassium formate by membrane method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0046] figure 1 Schematically provided the flow chart of the method for preparing potassium formate by the membrane method of the embodiment of the present invention 1, as figure 1 Shown, the method for preparing potassium formate by described membrane method may further comprise the steps:

[0047] (A1) Dissolving sodium formate and zinc sulfate in water at 0-50°C respectively to prepare sodium formate solution and zinc sulfate solution, the concentration of sodium formate is 20-60wt%, and the concentration of zinc sulfate is 10-40wt%;

[0048] (A2) mixing the sodium formate solution and zinc sulfate solution obtained in step (A1), filtering the reaction solution to obtain zinc formate precipitate;

[0049] (A3) Dissolve the above-mentioned zinc formate and potassium sulfate in water at 20-80°C to prepare potassium sulfate solution and zinc formate solution;

[0050](A4) The potassium sulfate solution and zinc formate solution obtained in the mixing step (A3), the molar rat...

Embodiment 2

[0054] According to the application example of the preparation method in Example 1 of the present invention, in this application example, the preparation method is specifically:

[0055] (A1) Dissolve sodium formate and zinc sulfate in water at 50°C respectively to prepare sodium formate solution and zinc sulfate solution, the concentration of sodium formate is 60wt%, and the concentration of zinc sulfate is 10wt%;

[0056] (A2) mixing the sodium formate solution and zinc sulfate solution obtained in step (A1), filtering the reaction solution to obtain zinc formate precipitate;

[0057] (A3) Dissolve the above-mentioned zinc formate and potassium sulfate in water at 80°C to prepare potassium sulfate solution and zinc formate solution;

[0058] (A4) The potassium sulfate solution and zinc formate solution obtained in the mixing step (A3), the molar ratio of zinc formate and potassium sulfate is 1:1, the mixed solution is concentrated through a nanofiltration membrane, and the m...

Embodiment 3

[0062] According to the application example of the preparation method in Example 1 of the present invention, in this application example, the preparation method is specifically:

[0063] (A1) Dissolving sodium formate and zinc sulfate in water at 40°C respectively to prepare sodium formate solution and zinc sulfate solution, the concentration of the sodium formate is 40wt%, and the concentration of zinc sulfate is 30wt%;

[0064] (A2) mixing the sodium formate solution and zinc sulfate solution obtained in step (A1), filtering the reaction solution to obtain zinc formate precipitate;

[0065] (A3) Dissolve the above-mentioned zinc formate and potassium sulfate in water at 50°C respectively to prepare potassium sulfate solution and zinc formate solution;

[0066] (A4) The potassium sulfate solution and zinc formate solution obtained in the mixing step (A3), the molar ratio of zinc formate and potassium sulfate is 1:1, the mixed solution is concentrated through a nanofiltration ...

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Abstract

The invention provides a method for preparing potassium formate by means of a membrane method. The method for preparing the potassium formate by means of the membrane method comprises the following steps: (A1) respectively preparing a sodium formate solution and a zinc sulfate solution; (A2) mixing the sodium formate solution and the zinc sulfate solution, and filtering reaction liquid to obtain zinc formate; (A3) preparing a potassium sulfate solution, and preparing a zinc formate solution by using the zinc formate; (A4) mixing the potassium sulfate solution and the zinc formate solution, and enabling the mixed solution to pass through a membrane, wherein monovalent ions in the mixed solution selectively pass through the membrane, and divalent ions in the mixed solution are trapped by the membrane; (A5) concentrating the permeate liquid to obtain a potassium formate solution. The method has the advantages of being low in cost, and the like.

Description

technical field [0001] The invention relates to the field of chemical industry, in particular to an improved preparation method of potassium formate, in particular to a method for preparing potassium formate by membrane method. Background technique [0002] At present, the production process of potassium formate has the following types due to different raw materials. [0003] (1) Formic acid method [0004] Formic acid and potassium hydroxide are used as raw materials to react to produce potassium formate and water. [0005] KOH+HCOOH——HCOOK+H 2 o [0006] Formic acid and potassium carbonate are used as raw materials to react to produce potassium formate and water. [0007] K 2 CO 3 +2HCOO 2 ——HCOOK+CO 2 +H 2 o [0008] Potassium formate is produced by direct reaction of formic acid and potassium hydroxide or potassium carbonate under certain conditions. The process is to add methanol and potassium hydroxide or potassium carbonate into the reactor, stir and control...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C07C53/06C07C51/41
CPCC07C51/412C07C53/06
Inventor 李君占
Owner BEIJING NEWBIOLINK TECH DEV