Traditional Culture Encyclopedia - Traditional virtues - Which is the higher yield of citric acid extracted by calcium salt precipitation method or ion exchange method?
Which is the higher yield of citric acid extracted by calcium salt precipitation method or ion exchange method?
Calcium salt method has a long development time, mature technological conditions, easily available raw materials and high stability of citric acid products, and is a traditional method for extracting citric acid. However, there are also serious problems, such as complicated technological process and low total yield of citric acid. The total yield of domestic manufacturers is mostly below 75%, and it is difficult to reach 80%. Compared with calcium salt extraction method, ion exchange method has the advantages of simple operation, low production cost, no waste such as calcium sulfate, and reduced labor intensity. The total yield of citric acid can reach over 85%.
The main methods for separating and purifying citric acid from fermentation broth at home and abroad are calcium salt method, ion exchange adsorption method, liquid membrane separation method, electrodialysis method and solvent extraction method.
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