Title: Separation of high purity dysprosium oxide and holmium oxide by extraction chromatography with 507 extraction elution resin
Application Number: 85101611 Application Date: 1985.04.01
Publication Number: 1001956 Publication Date: 1986.07.30
Approval Pub. Date: Granted Pub. Date: 1989.07.12
International Classifi-cation: B01D11/00,C01F17/00
Applicant(s) Name: Changchun Inst. of Applied Chemistry, Chinese Acad Address:
Inventor(s) Name: Lin Suxian
Attorney & Agent: SONG TIANPING CAO GUIZHEN
Abstract:
     The present invention is a chromatographic method for rare earth separation, in which P507 extraction elution resin is taken as column packing for separation of holmium oxide and dysprosium oxide. With P507 as stationary phase, dysprosium and holmium concentrate as aqueous feed, and hydrochloric acid as mobile phase, controlled at constant temperature and elution rate, the following items are obtained successively by gradient elution: Dy2O3 of over 99.95% purity and yield more than 95%; Ho2O3 of over 99.95% purity and yield more than 85%, and Ho2O3 of 99.50% purity and yield more than 10%, and the total yield being more than 97%. The present technology is of low cost, short time cycle, high separation efficiency and easy operation, and can be utilized in commercial production.
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