Title: Citric acid extracting process
Application Number: 95117810 Application Date: 1995.12.04
Publication Number: 1153821 Publication Date: 1997.07.09
Approval Pub. Date: Granted Pub. Date: 2000.09.06
International Classifi-cation: C07C51/42,C12P7/48
Applicant(s) Name: Ecological Environment Research Center, Chinese Ac Address: 100085
Inventor(s) Name: Zhang Hongxun, Liu Deming
Attorney & Agent: YAN FANG
Abstract:
     Technological processes of extracting citric acid includes filtration of mash to eliminate mycelium, filtration in porous filtering machine, decoloring with active carbon, adsorption and exchange with anion exchange resin, elimination of easy-to-carbonate compound and resolution by ammonia water, transformation with cation exchange resin, eliminating positive foreign ions with cation exchange resin, eliminating negative foreign ions with anion exchange resin, concentration and crystallization. The said processes can obtain citric acid yield as high as 93% without calcium slurry produced.
Time: 9
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