Title: Process for direct extraction of chrome yellow from treatment of Cr 6 waste liquid
Application Number: 89104138 Application Date: 1989.12.02
Publication Number: 1052102 Publication Date: 1991.06.12
Approval Pub. Date: Granted Pub. Date:
International Classifi-cation: C01G37/14,C02F1/62,C09C1/34
Applicant(s) Name: Chongqing Univ. Address:
Inventor(s) Name: Fang Zude, Hu Zimin
Attorney & Agent: ZHANG RONGQING MAO CHENGLIN
Abstract:
     This process includes three chemical deposition steps at room temp: purifying waste water containing Cr 6 , deposition of Cr6 and post-treatment of excessive Pb2 for both treating the waste water containing Cr6 with different concentrations and recovering active CrO4- to make qualified chrome yellow product. The invention features low investment, high capacity to treat waste Cr-containing water, low energy consumption and quality treated water meeting the national standard.
Time: 7
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