Document Type and Number:
Japanese Patent JPS5411762
Kind Code:
B2
Abstract:
1401891 Removing metals from solutions; gas separation STAMICARBON BV 14 June 1973 [17 June 1972 1 May 1973 17 May 1973] 28383/73 Headings C1A and C1C [Also in Division C3] Metal values are removed from solutions or gaseous mixtures containing them by contacting the solution or mixture with a reduced keratin, a Bunte salt of a keratin or a natural or synthetic polyamide having at least some of the amide groups replaced by thioamide groups, which binds the metal values to the contacting agent. The keratin may be in the form of wool or fowls' feathers and can be converted to the Bunte salt by reaction with an alkali metal or alkaline earth metal sulphite with a tetrathionate as oxidant. The amide groups of a natural or synthetic polyamide can be replaced by thioamide groups by reaction of the polyamide with phosphorus pentasulphide. The process may particularly be applied to aqueous effluents.
Application Number:
JP6861473A
Publication Date:
May 17, 1979
Filing Date:
June 18, 1973
Export Citation:
International Classes:
C22B3/00; B01D15/00; B01D15/04; B01D53/64; B01J20/24; B01J45/00; C02F1/28; C02F1/42; C02F1/52; C02F1/62; C09K3/00; C22B3/24; (IPC1-7): C22B7/00; C02C5/02; C09K3/00; C22B3/00
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