Process for the extraction of cations and application thereof to the treatment of aqueous effluents
US4876036A · kind A · utility
12Cited by
15References
16Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Dec 18, 1987 |
| Grant date | Oct 24, 1989 |
| Priority date | — |
| Expiry date | Dec 18, 2007 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB01J39/07
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
A process for the extraction of cations from an aqueous effluent. An effective quantity of at least one polymer or copolymer, which is physically or chemically crosslinked, is introduced into the aqueous effluent. The polymer or copolymer is based on one or more units selected from salified acrylic acid, quarternized acrylic acid, and a copolymer comprising from 40 to 60 mole % of acrylic acid and from 60 to 40 mole % of at least one dialkylaminoalkyl acrylate in which each alkyl group contains from 1 to 4 carbon atoms. This process is used to treat aqueous effluents.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.