Patent US4048085A successfully refreshed from Google Patents.
US4048085A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Preparation of detergent compositions
Assignee: Lever Brothers Co
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Filing: 1976-04-19
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Granted: 1977-09-13
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Expires: 1996-04-19
Abstract
Abstract Process for preparing a detergent powder composition comprising forming an alkaline aqueous slurry of at least a surface-active agent, a builder salt and an organic activator for peroxy-compounds, and subjecting said aqueous slurry to a spray-drying operation to form a particulate detergent composition having the organic activator homogeneously distributed therein. The particulate detergent composition may be admixed with an inorganic persalt e.g. sodium perborate, and also with an enzyme, e.g. a proteolytic enzyme.
Inventors
- 👤 Robin Snell Heslam
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 10:46
CPC Classifications
C; C11; C11D; C11D3/00; C11D3/39; C11D3/3902; C11D3/3905; C11D3/3907; C11D11/00; C11D11/02
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
150 words
A process for preparing a detergent powder composition comprising the steps of forming an alkaline aqueous slurry having a pH value (measured on a 1% solids solution) of about 8.5 to 12 and comprising a surface-active agent selected from the group consisting of anionic, nonionic, zwitterionic, amphoteric and cationic detergents and mixtures thereof in an amount of about 1-20% by weight; a builder salt selected from the group consisting of inorganic and organic complex-forming substances and mixtures thereof in an amount of about 5-40% by weight, an organic activator for peroxy compounds having a hydrolysis rate of not more than 15%, in an amount of about 0.2-10% by weight; and water in an amount of about 40-60% by weight, heating said aqueous slurry to a temperature of about 60°-90° C, and subjecting it to a spray-drying operation to form a particulate detergent composition having the organic activator homogeneously distributed therein.
Claim 2
Dependent Claim
150 words
A process for preparing a detergent powder composition comprising the steps of forming an alkaline aqueous slurry having a pH value (measured on a 1% solids solution) of about 8.5 to 12 and comprising a surface-active agent selected from the group consisting of anionic, nonionic, zwitterionic, amphoteric and cationic detergents and mixtures thereof in an amount of about 1-20% by weight; a builder salt selected from the group consisting of inorganic and organic complex-forming substances and mixtures thereof in an amount of about 5-40% by weight, an organic activator for peroxy compounds having a hydrolysis rate of not more than 15%, in an amount of about 0.2-10% by weight; and water in an amount of about 40-60% by weight, heating said aqueous slurry to a temperature of about 60°-90° C, and subjecting it to a spray-drying operation to form a particulate detergent composition having the organic activator homogeneously distributed therein.
Claim 3
Dependent Claim
33 words
A process according to claim 1, wherein to said particulate detergent composition is added a peroxy compound in an amount such that the final composition comprises 2-40% by weight of said peroxy compound.
Claim 4
Dependent Claim
29 words
A process according to claim 1, wherein the slurry is spray-dried at an inlet air temperature of about 275°-350° C and an outlet air temperature of about 100°-115° C.
Claim 5
Dependent Claim
33 words
A process according to claim 1 wherein the aqueous slurry has a pH value (measured on 1% solid solution) of about 9-10.5 and is heated to about 65°-85° C prior to being spray-dried.
Claim 6
Dependent Claim
20 words
A process according to claim 1, wherein the organic activator comprises about 0.5-7.5% by weight of the total slurry composition.
Claim 7
Dependent Claim
70 words
A process according to claim 1, wherein the organic activator is selected from the group consisting of acyl organo amides of the formula RCONR 1 R 2 , where RCO is a carboxylic acid radical, R 1 is an acyl radical and R 2 is an organic radical, and carbonic or pyrocarbonic acid esters of the formula R 1 OCOOR 2 or R 3 OCO-OCO-OR 2 and the mixtures thereof.
Claim 8
Dependent Claim
20 words
A process according to claim 6, wherein the organic activator is N, N, N 1 , N 1 -tetraacetylethylene diamine.
References Cited (Backward Citations)
US3741913A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1980-09-12 | 1981-03-14 | 1981-09-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-09-12 | 1985-03-14 | 1985-09-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-09-12 | 1989-03-14 | 1989-09-13 | $7700.00 | Window Closed / Lapsed |