METHOD OF PREPARING CITRIC ACID FROM ALKALINE CITRATE SOLUTIONS

摘要

FIELD: organic chemistry, chemical technology. SUBSTANCE: method of preparing citric acid from enzymatic solutions of alkaline citrates involves decolorization of solution, partial conversion of citrate by electrodialysis, complete conversion of residual citrates, desalting solution and crystallization. Solution is desalted by passing liquid through strong acid cationite in H⁺-form and medium or weak-base anionite in OH^--form. Decolorization is carried out using ion sorbent IA-1p in Cl^--form. Method ensures to enhanced purity of end product, diminish consumption of electric energy, ion sorbents and chemicals. EFFECT: improved method of preparing. 2 cl, 1 dwg