Title: Separation of rare-earth element dysprosium by liquid-liquid extraction separation
Application Number: 86108135 Application Date: 1986.11.29
Publication Number: 1018777 Publication Date: 1988.06.08
Approval Pub. Date: Granted Pub. Date: 1992.07.29
International Classifi-cation: C01F17/00,C22B59/00
Applicant(s) Name: Changchun Applied Chemistry Inst., Chinese Academy Address:
Inventor(s) Name:
Attorney & Agent: CAO GUIZHEN LIAO YUZHEN
Abstract:
     Separating dysprosium is from its eneriched substance, taking ammoniated HEH (EHP) (2-ethylhexyl phosphonate ester of mono is "2-ethyl-hexyl") as extractant. A purity of is great than 99% enriched Dy2O3 and a purity of is great than 60% enriched Ho are obtained through countercurrent multistage fractional distillation and extraction, using a 30-40% ammoniation ratio, a 1.2-1.7 M HEH (EHP) kerosene as extractant, a concn. of 0.15-0.30 M and an acidity of 0.1-0.3 N enriched Dy chloride water soln. as feedstock, a 2.5-3.5 N of HCl as washing acid, and a 4-5 N of HCl as retruning acid.
Time: 9
<- Previous Patent:Comprehensive utilization process...   |  Next Patent:Calcium Hypochlorite process ->