Title: Dezincification of waste ferment water of glutamic acid
Application Number: 87100157 Application Date: 1987.01.17
Publication Number: 1020770 Publication Date: 1988.09.14
Approval Pub. Date: Granted Pub. Date:
International Classifi-cation: C02F1/26,C02F1/62,C07C99/12,C07C101/22,C12P13/14
Applicant(s) Name: Qinghua Univ. Address:
Inventor(s) Name: Chen Zhi, Lei Jinlin
Attorney & Agent: WANG BING
Abstract:
     This invention is about dezincification of waste ferment water of glutamic acid. The solvent of D2EHPA and saturated hydrocarbon with 12-16 carbon atoms are used to extract waste water and the hydrochloric acid is used to reverse extract it. After reverse extraction the solvent flows back into the disolving procedure of zinc glutamate and the acid in it is eliminated. Then it is used as deposition agent of zinc salt. The content of zinc ion in remnant liquid is 1ess than 5 millilitres every litre, which achieves the drainage standard.
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