Process for the preparation of anion exchangers by aminoalkylation of crosslinked aromatic polymer using sulphur trioxide catalyst
US4077918A · kind A · utility
7Cited by
3References
8Claims
0Family size
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Key dates
| Filing date | Apr 26, 1976 |
| Grant date | Mar 7, 1978 |
| Priority date | — |
| Expiry date | Apr 26, 1996 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08F2810/20
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
Anion-exchange resins made by aminoalkylating an alkylatable resin in solvent-swollen condition with bis-carboxyimidomethyl ethers in a reaction mixture containing essentially unhydrated SO.sub.3 that can be added in the form of a solution in H.sub.2 SO.sub.4 or other solvent or as a complex with the alkylating ether, or in undissolved condition. The acylaminoalkylated product thus formed is deacylated as by hydrolysis and can have the resulting amino group alkylated and even quaternized.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.