Liquid purification or separation – Processes – Liquid/liquid solvent or colloidal extraction or diffusing...
Patent
1986-01-17
1987-05-12
Therkorn, Ernest G.
Liquid purification or separation
Processes
Liquid/liquid solvent or colloidal extraction or diffusing...
2101982, 2105021, 502404, 536 41, 536 62, 536 186, 536 30, B01D 1508
Patent
active
046648062
ABSTRACT:
Novel chemically modified anionic polysaccharides which contain acid radicals of the formula ##STR1## attached to the polysaccharide component, wherein R.sub.1.sup..crclbar. is carboxyalkyl or dicarboxyalkyl containing 1 to 5 carbon atoms in the alkyl moiety, or is carboxyphenyl or ketocarboxymethyl, and Q.sub.1.sup..sym. is a water-soluble cation, are obtained by reacting the polysaccharides with compounds that contain N-methylolamide groups, in particular with novel compounds of formula ##STR2## wherein R.sub.1.sup..crclbar. and Q.sub.1.sup..sym. have the given meanings, and are used for purifying effluents and, in particular, for the separation by chromatography of mixtures of substances which contain amphoteric or cationic components.
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patent: 4094832 (1978-06-01), Soderberg
patent: 4094833 (1978-06-01), Johansson et al.
patent: 4178438 (1979-12-01), Haase et al.
patent: 4263146 (1981-04-01), Wegmuller et al.
patent: 4577013 (1986-03-01), Merz et al.
Ciba-Geigy Corporation
Mansfield Kevin T.
Therkorn Ernest G.
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