Continuous process for making alkyl aldosides from starch or other carbohydrates
US4223129A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Sep 1, 1978 |
| Grant date | Sep 16, 1980 |
| Priority date | — |
| Expiry date | Sep 1, 1998 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB01J2219/00186
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
A continuous process for making alkyl aldosides from polysaccharides and more particularly mixed alkyl glycosides from starch by direct alcoholysis. A polysaccharide, such as starch, is slurried in an alcohol and passed through a heated, confined zone under pressure in the presence of an acid catalyst to form a mixed alkyl aldoside. The alcohols which may be used include methanol, ethanol, propanol and butanol, their isomers and mixtures thereof. Higher alkyl glycosides are surfactants and, in some instances, it is advantageous to use higher alcohols, such as decyl and dodecyl alcohols, to obtain particular surfactant properties in the resulting alkyl glycosides. Mixed alkyl glycosides are useful in detergent applications, and as backbone polymers in polyurethane foams.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.