Back to results
US 10,780,167 B2Granted
Aqueous solution containing n-long-chain acyl acidic amino acid and/or salt thereof, and method for producing same
AssigneeAjinomoto Co., Inc.
InventorsGaku Hattori, Hiroji Ishii, Masahiro Ino
Life of this patent
Estimating the term…
Abstract
The present invention provides a method of producing an aqueous solution containing an N—C8-22 acyl acidic amino acid and/or a salt thereof and having pH 8.4-9.5, including the first step for reacting an acidic amino acid and/or a salt thereof with a C8-22 fatty acid chloride in a water solvent at pH 10-13 to form an N—C8-22 acyl acidic amino acid salt, and the second step for adjusting the pH of the aqueous solution after the first step to 8.4-9.5.
Claims9
A method of producing an aqueous solution,
- said aqueous solution comprising at least one member selected from the group consisting of an N—C8-22 aliphatic acyl acidic amino acid and a salt of an N—C8-22 aliphatic acyl acidic amino acid and having pH 8.4 to 9.5,
- said method comprising:
- (i) reacting at least one member selected from the group consisting of glutamic acid, aspartic acid, a salt of glutamic acid and a salt of aspartic acid, with a C8-22 fatty acid chloride in a water solvent at pH 10 to 13 to obtain an aqueous solution comprising said at least one member selected from the group consisting of an N—C8-22 aliphatic acyl acidic amino acid and a salt of an N—C8-22 aliphatic acyl acidic amino acid;
- and
- (ii) adjusting the pH of said aqueous solution to a value of 8.4 to 9.5;
- wherein said water solvent is water or a mixed solvent of a hydrophilic organic solvent and water;
- and
- wherein said mixed solvent comprises said hydrophilic organic solvent in a content of not more than 5 wt % of said mixed solvent.
5 more elements
Dependencies are inferred from the claim text.