STUDIES ON THE EXTRACTION OF GALLIUM AND ALUMINIUM WITH DIALKYL-DITHIOPHOSPHORIC ACIDS.

• The extraction of Ga**3** plus has been studied with the liquid cation exchangers di-n-butyl-dithiophosphoric acid (DBTPA) and di-(2-ethylhexyl)-dithiophosphoric acid (DETPA) in kerosene. The partition of Ga**3** plus and Al**3** plus has been studied between equal volumes of aqueous and organic phases. The extraction coefficients obtained with DETPA are about one order of magnitude higher than those obtained with DBTPA. The trend of the extraction coefficients with increasing pH can be interpreted assuming the extraction of species M(DBTPA)//3 and M(DETPA)//3. The extraction coefficients are about two orders of magnitude higher for Ga**3** plus than for Al**3** plus . The extent of extraction of both Ga**3** plus and Al**3** plus decreases at higher pH and at pH less than 10 there is practically no extraction.

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NATURVETENSKAP  -- Kemi (hsv//swe)

NATURAL SCIENCES  -- Chemical Sciences (hsv//eng)

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Kemi

Chemistry

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