Method for producing fatty acid polyglycol ester sulphates
AssigneeCognis Deutschland GmbH & Co. KG
InventorsHans-Christian Raths, Thomas Engels, Rainer Rueben, Joerg Kahre
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Abstract
A method of producing fatty acid polyglycol ester sulfates of the general formula (I): R1COO(AO)nSO3M (I) is disclosed, wherein R1CO represents a linear or branched, aliphatic, saturated and/or unsaturated acyl radical with 6 to 22 carbon atoms, AO represents CH2CH2O, CHCH3CH2O and/or CH2CHCH3, n represents a number from about 0.5 to about 5 and M represents a cation. The disclosed process comprises the sulfation of fatty acid polyglycol esters followed by neutralization, wherein the neutralization is carried out at a pH of from about 5 to about 9.
Claims20
A method of producing a fatty acid polyglycol ester sulfate of the general formula (I):
- R1COO(AO)nSO3M (I)
- wherein R1CO represents a linear or branched, aliphatic, saturated and/or unsaturated acyl radical with 6 to 22 carbon atoms, AO represents CH2CH2O, CHCH3CH2O and/or CH2CHCH3O, n represents a number from about 0.5 to about 5 and M represents a cation, said process comprising:
- (a) sulfating a fatty acid polyglycol ester of the general formula (II):
- R1COO(AO)nH (II)
- wherein R1CO represents a linear or branched, aliphatic, saturated and/or unsaturated acyl radical with 6 to 22 carbon atoms, AO represents CH2CH2O, CHCH3CH2O and/or CH2CHCH3O, and n represents a number from about 0.5 to about 5;
- and
- (b) subsequent neutralization wherein said neutralization is carried out at a pH of from about 5 to about 9.
A method of enhancing foam properties of surfactant mixtures, said method comprising:
- (a) providing a surfactant mixture;
- (b) providing a fatty acid polyglycol ester sulfate of the general formula (I):
- R1COO(AO)nSO3M (I)
- wherein R1CO represents a linear or branched, aliphatic, saturated and/or unsaturated acyl radical with 6 to 22 carbon atoms, AO represents CH2CH2O, CHCH3CH2O and/or CH2CHCH3O, n represents a number from about 0.5 to about 5 and M represents a cation;
- and
- (c) combining the surfactant mixture and the fatty acid polyglycol ester sulfate.
Dependencies are inferred from the claim text.