# US 8,541,354 B2 · Catalytic laundry detergent composition comprising relatively low levels of water-soluble electrolyte

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- Number: US 8,541,354 B2
- Document ID: US8541354B2
- Status: Granted
- Kind: B2
- Application number: 12/888,495
- Filed: 2010-09-23
- Published: 2011-01-20
- Granted: 2013-09-24
- Earliest claimed: 2009-07-09
- Assignees: The Procter & Gamble Company
- Applicants: Alan Thomas Brooker; Nigel Patrick Somerville Roberts; Gregory Scot Miracle; Neil Joseph Lant; Philip Frank Souter; Mark Forrest; Colin Ure
- Inventors: Alan Thomas Brooker; Nigel Patrick Somerville Roberts; Gregory Scot Miracle; Neil Joseph Lant; Philip Frank Souter; Mark Forrest; Colin Ure
- Web page: https://patentgrep.com/patent/US8541354B2

## CPC

- C11D 3/386: Preparations containing enzymes {, e.g. protease or amylase}
- C11D: DETERGENT COMPOSITIONS; USE OF SINGLE SUBSTANCES AS DETERGENTS; SOAP OR SOAP-MAKING; RESIN SOAPS; RECOVERY OF GLYCEROL

## Abstract

A solid laundry detergent composition having multiple catalysts and water-soluble electrolyte, wherein the ratio of (i) the total reduction in activation energy in kilojoules per mole achieved by the catalysts to (ii) the electrolytic strength of the laundry detergent composition at a concentration of 1 g/l in de-ionized water and at a temperature of 25° C. in mScm−1 laundry detergent composition is at least 300.

## Claims

### Claim 1

A solid laundry detergent composition consisting of eight catalysts, 0-10 wt % sodium carbonate, 0-10 wt % zeolite builder, 0-10 wt % phosphate builder, 0-10 wt % sodium sulphate, 0-10 wt % silicate, 0-10 wt % sodium chloride and less than 40 wt % reducing sugar, wherein the eight catalysts are a protease, an amylase, a cellulase, a lipase, a mannose, a pectate lyase, a manganese centered catalyst, and a cobalt centered catalyst, and wherein the ratio of (i) the total reduction in activation energy in kilojules per mole achieved by the catalysts to (ii) the electrolytic strength of the laundry detergent composition as a concentration of 1 g/L in de-ionized water and at a temperature of 25 degrees C. in mScm-1 is at least 300.

### Claim 2 (depends on 1)

A laundry detergent composition according to claim 1, wherein the ratio of (i) the total reduction in activation energy in kilojoules per mole achieved by the catalysts to (ii) the electrolytic strength of the laundry detergent in mScm-1 is at least 1000.

### Claim 3 (depends on 1)

A laundry detergent composition according to claim 1, wherein the catalyst reduces the activation energy by a total of at least 160 kjmol−1.

### Claim 4 (depends on 1)

A laundry detergent composition according to claim 1, wherein the composition is in free-flowing particulate form.

### Claim 5 (depends on 1)

A method of laundering fabric in an automatic washing machine, comprising the step of contacting a laundry detergent composition according to claim 1, to water to form a wash liquor, and laundering fabric in said wash liquor, wherein 30 g or less of the laundry detergent is added to the water.