Chemistry of inorganic compounds – Treating mixture to obtain metal containing compound – Iron group metal
Patent
1977-07-29
1979-08-28
Hearn, Brian
Chemistry of inorganic compounds
Treating mixture to obtain metal containing compound
Iron group metal
423390, 423484, 423DIG1, 134 10, C01B 722, C01G 4910, C01B 2146
Patent
active
041660986
ABSTRACT:
A process for treating an acid waste liquid containing Fe ions which has been used for acid washing of metallic materials or articles, comprising the first stage where an organic solvent (A) is added to the acid waste liquid to extract Fe ions, the second stage where an acid is added to the resulting acid waste liquid to convert chemical species of remaining metal salts and increase the hydrogen ion concentration followed by addition of an organic solvent (B) to recover the mineral acid of concern by extraction, the third stage where an organic solvent (C) is added to the resulting acid waste liquid to extract and recover other required mineral acids, and regenerating each of the organic solvents (A), (B) and (C) in respective stages.
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Habashi, Extractive Metallurgy, vol. 2, Gordon and Breach, N.Y. (1970), pp. 175, 176.
Marcus et al. Ion Exchange and Solvent Extraction of Metal Complexes, Wiley-Interscience Ltd., 1969, p. 675.
Nishimura Sanji
Watanabe Morio
Hearn Brian
Solex Research Corp. of Japan
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