# US 5,710,332 A · Carbohydrate-derived surfactants and their precursors

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- Number: US 5,710,332 A
- Document ID: US5710332A
- Status: Granted
- Kind: A
- Application number: 08/679,152
- Filed: 1996-07-12
- Granted: 1998-01-20
- Earliest claimed: 1992-05-11
- Assignees: Albright & Wilson Limited
- Inventors: Brynley Morris Phillips; Ajit Kumar; Alan Smithson
- Web page: https://patentgrep.com/patent/US5710332A

## CPC

- C07C 291/04: containing amino-oxide bonds
- C07C 209/02: by substitution of hydrogen atoms by amino groups
- C07C 229/12: to carbon atoms of acyclic carbon skeletons
- C07C 309/14: containing amino groups bound to the carbon skeleton
- C07C: ACYCLIC OR CARBOCYCLIC COMPOUNDS

## Abstract

A method for the manufacture of N,N dialkylglycamine compounds of general formula R.sub.2 NR.sub.1 R.sub.3 (I) by reacting a secondary amine of general formula R.sub.2 NHR.sub.3 (II) in which R.sub.2 is a straight or branched chain alkyl or hydroxyalkyl group having from 1 to 4 carbon atoms and R.sub.3 is a residue from a monosaccharide, with an alkali metal or alkaline earth metal aliphatic sulphate, R.sub.1 SO.sub.4 M, in which R.sub.1 is a straight or branched chain alkyl or alkenyl group having from 8 to 24 carbon atoms. The betaine, suphobetaine and N-oxidised derivatives of (I) are provided for use as mild surfactants.

## Claims

### Claim 1

An N--C.sub.10-20 alkyl-N-methylglycamine N-oxide.

### Claim 2

A method of making N--C.sub.10-20 alkyl-N-methylglycamine N-oxide, wherein said method comprises oxidizing an N--C.sub.10-20 alkyl-N-methylglycamine to the N--C.sub.10-20 alkyl-N-methylglycamine N-oxide.

### Claim 3

A method of making N--C.sub.10-20 alkyl-N-methylglycamine N-oxide, wherein said method comprises oxidizing an N--C.sub.10-20 alkyl-N-methylglycamine to the N--C.sub.10-20 alkyl-N-methylglycamine N-oxide with hydrogen peroxide as the oxidizing agent.