EP0092875A1
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Process of preparing alkylpolysaccharides
Assignee: Procter and Gamble Co
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Filing: 1983-04-20
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Granted: —
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Expires: 2003-04-20
Abstract
Abstract An improved process for making long chain alkyl polysaccharides by reacting a long chain alcohol with a short chain alkyl saccharide in the presence of an acid catalyst in which the temperature and time of reaction are carefully controlled to avoid discoloration and excessive polymerization.
Inventors
- 👤 Mark Hsiang K. Mao
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-05 05:44
CPC Classifications
C; C07; C07H; C07H15/00; C07H15/02; C07H15/04
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
127 words
The process for preparing alkyl polysaccharides in which the alkyl group contains from about 12 to about .18 carbon atoms comprising the step of reacting a short chain alkyl monosaccharide of a reducing saccharide containing from about five to about six carbon atoms, in which the alkyl group contains from 1 to about 5 carbon atoms with a fatty alcohol containing from about 12 to about 18 carbon atoms at a temperature of from about 90°C. to about 120°C. in the presence of an acid catalyst while removing the resulting alcohol containing from 1 to about 5 carbon atoms and destroying the acid catalyst after at least 90% of the short chain alkyl monosaccharide has been destroyed and before the average polysaccharide chain length exceeds about 20.
Claim 2
Dependent Claim
127 words
The process for preparing alkyl polysaccharides in which the alkyl group contains from about 12 to about .18 carbon atoms comprising the step of reacting a short chain alkyl monosaccharide of a reducing saccharide containing from about five to about six carbon atoms, in which the alkyl group contains from 1 to about 5 carbon atoms with a fatty alcohol containing from about 12 to about 18 carbon atoms at a temperature of from about 90°C. to about 120°C. in the presence of an acid catalyst while removing the resulting alcohol containing from 1 to about 5 carbon atoms and destroying the acid catalyst after at least 90% of the short chain alkyl monosaccharide has been destroyed and before the average polysaccharide chain length exceeds about 20.
Claim 3
Dependent Claim
37 words
The process of Claim 1 wherein the temperature is from about 100°C. to about 120°C. and the catalyst is present at a level of from about 0.0001 mole to about 0.02 mole per mole of saccharide monomer.
Claim 4
Dependent Claim
33 words
The process of Claim 2 wherein the catalyst is destroyed after at least 95% of the short chain alkyl monosaccharide has been destroyed and before the average polysaccharide chain length exceeds about 4.
Claim 5
Dependent Claim
14 words
The process of Claim 1 wherein the reaction takes place in a thin film.
Claim 6
Dependent Claim
26 words
The process of claim i wherein the destroying of the acid catalyst takes place after the percent of water in the distillate is below about 0.2%.
Claim 7
Dependent Claim
22 words
The process of Claim 5 wherein the catalyst is destroyed after the percent of water in the distillate is below about 0.1%.
Claim 8
Dependent Claim
22 words
The process of Claim 6 wherein the catalyst is destroyed after the percent of water in the distillate is below about 0.08%.
References Cited (Backward Citations)
DE1905523A1
Cited
DE2036472A1
Cited
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