Liquid-liquid extraction process for the recovery of tungsten from low level sources
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United States of America Patent
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-
Jul 21, 1981
Issued Date -
N/A
app pub date -
Sep 15, 1980
filing date -
Jul 23, 1979
priority date (Note) -
Expired
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Abstract
A recyclable process for the recovery of tungsten from low level aqueous sources comprises adjustment of the pH of the source solution to a value below about pH 6, extraction of the tungsten values into an organic phase comprising a chelating agent, an organic transfer agent, and an inert organic solvent. Preferred chelating agents include vicinally disubstituted aromatic compounds in which the substituents are selected from amino, carboxyl, hydroxyl, and sulfhydryl.
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