Method for preparing slightly colored alkylpolysaccharides having a low acid breakdown product content
US5681938A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Sep 11, 1995 |
| Grant date | Oct 28, 1997 |
| Priority date | — |
| Expiry date | Sep 11, 2015 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07H15/04
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
A process for the preparation of an alkylpolyoside containing from 6 to 32 carbon atoms in its alkyl chain, by the steps of: a) reacting, in the presence of an acid catalyst, a saccharide or a source of saccharide with a fatty alcohol having a hydrocarbon chain containing at least 6 carbon atoms, or a lower alcohol of the formula C.sub.n H.sub.2n+1 OH, in which n is an integer between 1 and 5, and a fatty alcohol having a hydrocarbon chain containing at least 6 carbon atoms; b) neutralizing the catalyst used in step a); and c) removing excess fatty alcohol. The neutralizing takes place using a neutralizing agent which is a tertiary amine of the formulae ##STR1## in which: --m is an integer between 0 and 5; and PA1 R.sub.1, R.sub.2, R.sub.3, R.sub.4, R.sub.5 and R.sub.6, which are identical or different, are independently: PA1 an alkyl radical having from 1 to 6 carbon atoms, PA1 a hydroxyalkyl or dihydroxyalkyl radical having from 2 to 4 carbon atoms, PA1 a phenyl radical, or PA1 a radical of the formula (C.sub.n H.sub.2n --O).sub.x H, in which n is an integer between 2 and 4 and x is an integer between 2 and 5. R.sub.1 R.sub.2 may be taken together with the nitrogen atom to which …
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.