Process for the preparation of alykl polyglycosides
AssigneeHenkel Corporation
InventorsC. Deane Roth, Frank L. Edwards, Patrick McCurry, Jr.
Life of this patent
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Abstract
A process for preparing alkyl polysaccharides comprising introducing a mixture of a hydrous saccharide in a first portion of fatty alcohol, introducing a second portion of fatty alcohol, agitating the mixture, allowing it to crystallize, reducing water content, contacting the reduced water content dispersion containing solid particles with an effective amount of acid catalyst and reacting the aliphatic alcohol with the saccharide source to form an alkylpolyglycoside.
Claims32
A process for preparing an alkyl polyglycoside, said process comprising:
- (a) providing a dispersion comprising a hydrous saccharide source and an alcohol, wherein the hydrous saccharide source contains at least a saccharide and an amount of water;
- (b) allowing the dispersion to stand for an amount of time sufficient to form a slurry comprising a semi-solid mass of saccharide particles;
- (c) breaking up the semi-solid mass;
- (d) reducing the amount of water in the slurry;
- and
- (e) reacting the alcohol and the saccharide in the presence of a catalytically-effective amount of an acid catalyst to form an alkyl polyglycoside.
A process for preparing an alkyl polyglycoside, said process comprising:
- (a) combining a dextrose syrup which contains at least a saccharide and an amount of water with a first amount of a fatty alcohol sufficient to wet the saccharide, whereby a dextrose syrup/fatty alcohol mixture is formed;
- (b) combining the dextrose syrup/fatty alcohol mixture with a second amount of the fatty alcohol sufficient to form a dispersion, wherein the first amount of the fatty alcohol is from about 10% to about 20% by weight of the total amount of fatty alcohol;
- (c) allowing the dispersion to stand for an amount of time sufficient to form a slurry comprising a semi-solid mass of saccharide particles;
- (d) breaking up the semi-solid mass;
- (e) reducing the amount of water in the slurry, wherein an inert gas sweep is maintained over the slurry while reducing the water content;
- and
- (f) reacting the fatty alcohol and the saccharide in the presence of a catalytically-effective amount of an acid catalyst at a temperature of from about 80° C. to about 140° C., to form an alkyl polyglycoside;
- wherein the fatty alcohol is represented by the general formula:
- RO(CR1H—CH2O)yH
- wherein R represents a linear or branched, saturated or unsaturated hydrocarbon moiety having from about 7 to about 22 carbon atoms;
- R1 represents a hydrogen atom, a methyl group, or an ethyl group;
- and y is a number of from 0 to 5;
- and wherein the fatty alcohol and the saccharide are present in a molar ratio of from about 2:1 to about 6:1.
A process for preparing a substantially dry, saccharide-containing mixture, said process comprising:
- (a) providing a dispersion comprising a hydrous saccharide source and an alcohol, wherein the hydrous saccharide source contains at least a saccharide and an amount of water;
- (b) allowing the dispersion to stand for an amount of time sufficient to form a slurry comprising a semi-solid mass of saccharide particles;
- (c) breaking up the semi-solid mass;
- and
- (d) reducing the amount of water in the slurry.
A process for preparing a substantially dry, saccharide-containing mixture, said process comprising:
- (a) combining a dextrose syrup which contains at least a saccharide and an amount of water with a first amount of a fatty alcohol sufficient to wet the saccharide, whereby a dextrose syrup/fatty alcohol mixture is formed;
- (b) combining the dextrose syrup/fatty alcohol mixture with a second amount of the fatty alcohol sufficient to form a dispersion, wherein the first amount of the fatty alcohol is from about 10% to about 20% by weight of the total amount of fatty alcohol;
- (c) allowing the dispersion to stand for an amount of time sufficient to form a slurry comprising a semi-solid mass of saccharide particles;
- (d) breaking up the semi-solid mass;
- and
- (e) reducing the amount of water in the slurry, wherein an inert gas sweep is maintained over the slurry while reducing the water content;
- wherein the fatty alcohol is represented by the general formula:
- RO(CR1H—CH2O)yH
- wherein R represents a linear or branched, saturated or unsaturated hydrocarbon moiety having from about 7 to about 22 carbon atoms;
- R1 represents a hydrogen atom, a methyl group, or an ethyl group;
- and y is a number of from 0 to 5.
Dependencies are inferred from the claim text.