# US 5,705,469 A · Process for the manufacture of a liquid detergent composition comprising a sulphiting agent and an enzyme system

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- Number: US 5,705,469 A
- Document ID: US5705469A
- Status: Granted
- Kind: A
- Application number: 08/428,158
- Filed: 1995-04-20
- Granted: 1998-01-06
- Earliest claimed: 1992-10-28
- Assignees: The Procter & Gamble Company
- Inventors: Alan David Blake; Jozef Philemona R. Geudens; Paul Andrew Hardy; Fabrice Francois J. Questel
- Web page: https://patentgrep.com/patent/US5705469A

## CPC

- C11D 3/38663: {Stabilised liquid enzyme compositions}
- C11D 3/0042: {Reducing agents}
- C11D: DETERGENT COMPOSITIONS; USE OF SINGLE SUBSTANCES AS DETERGENTS; SOAP OR SOAP-MAKING; RESIN SOAPS; RECOVERY OF GLYCEROL

## Abstract

A process is disclosed for the manufacture of a liquid detergent composition comprising a sulphiting agent and an enzyme system. Said enzyme system and said sulphiting agent interact together so as to generate odors which result in an odor deviation in said detergent composition. In the process of the invention, said enzyme system and said sulphiting agent are intimately mixed together separately from the remainder of the detergent composition so as to generate said odors outside the remainder of said detergent composition. Also disclosed is an enzyme premix consisting essentially of said enzyme system and said sulphiting agent.

## Claims

### Claim 1

A process for the manufacture of a liquid detergent composition comprising a sulphiting agent and at least one liquid enzyme whereby said at least one enzyme and said sulphiting agent interact together so as to generate odors, characterized in that said process includes the steps of:
intimately mixing in liquid form said at least one enzyme and at least a portion of said sulphiting agent separately from the remainder of the liquid detergent composition so as to generate said odors outside the remainder of said liquid detergent composition,
leaving said sulphiting agent and said at least one enzyme to interact until said odor has disappeared or is substantially reduced, and
thereafter adding said intimate mixture of said sulphiting agent and said at least one enzyme to the remainder of the liquid detergent composition.

### Claim 2 (depends on 1)

A process according to claim 1 wherein said sulphiting agent is potassium sulphite.

### Claim 3 (depends on 1)

A process according to claim 1, wherein said intimate mixture comprises 0.1 to 5% by weight of the sulphiting agent.

### Claim 4 (depends on 1)

A process according to claim 1, wherein said intimate mixture comprises 0.1 to 1% by weight of the sulphiting agent.

### Claim 5 (depends on 1)

A process according to claim 1, wherein said intimate mixture consists essentially of the at least one enzyme and 0.1 to 5% by weight of the sulphiting agent.

### Claim 6 (depends on 1)

A process according to claim 1, wherein said intimate mixture consists essentially of the at least one enzyme and the sulphiting agent.

### Claim 7 (depends on 1)

A process according to claim 1 wherein the reduction of said odor is facilitated by mixing and aerating the intimate mix of enzyme and sulphiting agent.

### Claim 8 (depends on 1)

A process according to claim 1 wherein said, enzyme includes protease, amylase, cellulase, lipase, or mixtures thereof.

### Claim 9 (depends on 1)

A process according to claim 1 wherein said liquid detergent comprises from 0.1 to 10% by weight of the enzyme.