Solvent system for polysaccharides
US4097666A · kind A · utility
41Cited by
11References
23Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Apr 29, 1976 |
| Grant date | Jun 27, 1978 |
| Priority date | — |
| Expiry date | Apr 29, 1996 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08L1/284
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
Natural or modified polysaccharides are dissolved in a solvent system comprising dimethyl sulfoxide and formaldehyde. The solvent system is particularly suitable for dissolving cellulose due to the fact that cellulose is rapidly dissolved under moderate conditions of temperature and pressure. The dissolved polysaccharides are readily recovered from the solvent system by diluting the solvent system with water or a short chain alcohol.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.