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US 4,732,946 AGranted
Process for the preparation of chelation resins
AssigneeThe Dow Chemical Company
InventorsGeorge R. Killat, Edward R. Husser
Life of this patent
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Abstract
A process for the preparation of chelation resins is disclosed. By this process, chelation resins can be prepared without the formation of large amounts of waste salt streams. In addition, novel chelation resins are prepared according to this process.
Claims7
A process for preparing a chelation resin comprising a water-insoluble polymer having attached thereto a plurality of chelation groups, said process comprising
- (a) attaching
- (1) a Michaels addition adduct of ammonia, a primary amine, an alkylene diamine or a polyalkylene polyamine and at least one mole of an alkyl or inertly substituted alkyl ester of an .alpha.,.beta.-ethylenically unsaturated carboxylic acid per mole of amine hydrogen to
- (2) a water-insoluble organic polymer having a plurality of reactive groups which react with a nitrogen atom of the Michaels addition adduct to attach the adduct thereto through said nitrogen atom, then
- (b) converting at least one of the ester groups on said Michaels adduct to an acid group.
1 more element
Dependencies are inferred from the claim text.