Cationic Surfactants with Improved pH Stability and Their Use
AssigneeLocus Solutions Ipco, LLC
InventorsLee SPEIGHT, Andrew MORRIS, Daniel HAGAMAN
Life of this patent
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Abstract
Novel cationic surfactant derivatives are provided, which have enhanced pH stability and surprising ability to clean soils while sanitizing and/or disinfecting in a single application. Methods of their use and production are also provided. Advantageously, the novel surfactants are biodegradable and have reduced toxicity over comparable traditional surfactants.
Claims33
A method for producing a cationic sophorolipid (SLP) derivative, the method comprising:
- a) producing a linear SLP molecule comprising a carboxylic acid fatty acid tail, and
- b) installing an amide comprising one or more cationic amino acid alkyl ester functional groups to the carboxylic acid tail of the linear SLP molecule to produce a long-chain amide.
2-4. (canceled)
7-8. (canceled)
A cationic surfactant having a structure selected from:
- and wherein R3=H, Mc, Et, MePh, Bu, sec-Bu, t-Bu;
- wherein structure (C) is a lauryl arginine amide and structure (D) is a linear sophorolipid argininol amide.
11-12. (canceled)
14-16. (canceled)
18-20. (canceled)
22-38. (canceled)
A method for purifying a sophorolipid (SLP), the method comprising circulating a crude SLP through an ion exchange bed containing ion exchange sites for a period of time from 30 minutes to 3 hours.
40-42. (canceled)
45-46. (canceled)
48-51. (canceled)
53-54. (canceled)
A method for improving the pH stability of a molecule comprising an ester moiety, the method comprising converting the ester moiety to an alcohol, wherein the molecule is an amino acid ethyl ester, and wherein the method comprises converting the amino acid ethyl ester to an amino alcohol.
(canceled)
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A method for producing a cationic surfactant compound with stability at pH 2-12, said compound having the following structure:
- wherein X is a C2-C22 fatty amide derived from a fatty acid or a biosurfactant comprising a fatty acid moiety, Y comprises an amino acid-derived functional group, and Z1 and Z2 are independently a hydrogen or alkyl group,
- the method comprising coupling a biosurfactant or fatty acid-containing substrate X′ with an amide Y′ comprising one or more amino acid side chains to produce an amino-acid functionalized surfactant XY, and
- either before, during or after coupling of XY, reacting Y′ or XY with a reducing agent Z′ to reduce any ester groups existing therein to an alcohol.
64-65. (canceled)
Dependencies are inferred from the claim text.