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J$xr (U.S..4 .) (Rcccivcd Dcccmlxr gth. rgG7) N-Bcnzoyl-N-phenylhydroxylaminc (BPHA), a cupferron analog, is used extensively as an organic precipitant' and solvent extractant since it reacts with sevcral metals to form stable chelates that are soluble in organic solvents. BPHA, however, is superior to cupferron because it exhibits good thermal and chemical stability, and it forms chelates with several metals in concentrated acids. In strong acids, BPHA becomes more selective and reacts only with some transition elements. Conscquently, the solvent extraction from uranium of 52 elements with BPHA-chloroformhydrochloric acid was thoroughly investigated; particular emphasis was devoted to extraction of easily hydrolyzed transition metals. ALIMARIN ANI) PETRUKHINS investigated the extraction of the benzoylphenylhydroxaminates of niobium, tantalum, titanium, vanadium, and zirconium from strong sulfuric acid. NABLVANETSd found that extraction of easily hydrolyzed elements at PH so is often suppressed by formation of polymeric or colloidal particles; therefore, extraction from concentrated acids is desirable. LYLE AND SHENDRIKARG investigatedextraction of antimony and tin from strong hydr

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Author

O.A. Vita; W.A. Levier; E. Litteral

Publisher

Elsevier Science; Elsevier ; Elsevier BV (ISSN 0003-2670)

Published

1968

Language

EN

Field

Chemistry (Physical Sciences)