C - Chemistry – Metallurgy – 08 – G
Patent
C - Chemistry, Metallurgy
08
G
402/242, 53/374
C08G 69/28 (2006.01) C02F 1/62 (2006.01) C08G 73/02 (2006.01)
Patent
CA 1193793
ABSTRACT OF THE DISCLOSURE The present invention relates to an amphoteric resin obtained by condensation of polyethylenepolyamine and butene-1,2,3,4-tetra-carboxylic acid. The present invention can provide several forms of amphoteric resins such as linear structure, somewhat cross-linked water rinsoluble and water swellable structure and water insoluble and cross-linked structure, since the resin contains in its repeating units an imino group, a carboxylic radical and an amido group. The resin can form chelate with several kinds of metal ions. Furthermore, the resin can also be modified by introducing several kinds of functional groups to bestowed the resin with particular chelating ability. Therefore the invention can provide novel resins, which have a strong chelating faculty and are suitably used as removing and recovering agents of heavy metals and novel metals.
375273
Kitamura Shuji
Mashio Fujio
Mitsui Toatsu Inorganic Chemicals Inc.
Ogilvy Renault Llp/s.e.n.c.r.l.,s.r.l.
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