Patent US4243544A successfully refreshed from Google Patents.
US4243544A
Expired / Lapsed
US
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Production of alumino-silicate-containing detergent composition
Assignee: Lever Brothers Co
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Filing: 1979-01-29
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Granted: 1981-01-06
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Expires: 1999-01-29
Abstract
Abstract Spray dried detergent compositions which incorporate a sodium aluminosilicate detergency builder, are prepared by forming an aqueous detergent slurry containing the sodium aluminosilicate and then admixing an aqueous solution or suspension of sodium silicate with the detergent slurry at a point between the slurry mixing vessel and the spray nozzle. This avoids harmful interaction between the sodium aluminosilicate and the sodium silicate, which otherwise decreases washing performance, while retaining good powder properties.
Inventors
- 👤 Thomas Taylor
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 21:42
CPC Classifications
C; C10; C10M; C10M3/00; C11; C11D; C11D11/00; C11D11/02; C11D3/00; C11D3/02; C11D3/04; C11D3/08; C11D3/12; C11D3/124; C11D3/1246; C11D3/128; C10M2207/00; C10M2207/02; C10M2207/021; C10M2207/022; C10M2207/023; C10M2207/026; C10M2207/04; C10M2207/046; C10M2207/10; C10M2207/12; C10M2207/125; C10M2207/129; C10M2207/28; C10M2207/281; C10M2207/282; C10M2207/283; C10M2207/286; C10M2207/287; C10M2207/34; C10M2207/40; C10M2207/402; C10M2207/404; C10M2209/00; C10M2209/02; C10M2209/08; C10M2209/082; C10M2209/10; C10M2209/103; C10M2209/104; C10M2209/105; C10M2209/106; C10M2209/107; C10M2211/00; C10M2211/02; C10M2211/022; C10M2211/06; C10M2223/00; C10M2223/02; C10M2223/04; C10M2223/041; C10M2223/042; C10M2229/00; C10M2229/02; C10M2229/04; C10M2229/05; C10N; C10N2010/00; C10N2010/02; C10N2040/00; C10N2040/08
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
115 words
In a process for preparing a powdered detergent composition having an effective amount of a sodium alumino-silicate detergency builder, said process comprising the steps of forming a detergent slurry containing the sodium alumino-silicate detergency builder in a slurry mixing vessel and spray drying the slurry through a spray nozzle, the improvement wherein an aqueous solution or suspension of sodium silicate in an amount sufficient to provide from 0.1 to 50% by weight in the detergent composition is admixed with the detergent slurry at a point between the slurry mixing vessel and the spray nozzle and the contact time between the detergent slurry and the solution or suspension of sodium silicate is less than 5 minutes.
Claim 2
Dependent Claim
115 words
In a process for preparing a powdered detergent composition having an effective amount of a sodium alumino-silicate detergency builder, said process comprising the steps of forming a detergent slurry containing the sodium alumino-silicate detergency builder in a slurry mixing vessel and spray drying the slurry through a spray nozzle, the improvement wherein an aqueous solution or suspension of sodium silicate in an amount sufficient to provide from 0.1 to 50% by weight in the detergent composition is admixed with the detergent slurry at a point between the slurry mixing vessel and the spray nozzle and the contact time between the detergent slurry and the solution or suspension of sodium silicate is less than 5 minutes.
Claim 3
Dependent Claim
26 words
A process according to claim 1, wherein the solution or suspension of sodium silicate has a concentration of from about 10% to about 70% by weight.
Claim 4
Dependent Claim
26 words
A process according to claim 2, wherein the concentration of the solution or suspension of sodium silicate is from about 20% to about 50% by weight.
Claim 5
Dependent Claim
24 words
A process according to claim 1, wherein the amount of sodium silicate used is about 1% to about 15% by weight of the composition.
Claim 6
Dependent Claim
19 words
A process according to claim 1, wherein the sodium silicate used has the formula Na 2 O.1-4SiO 2 .
Claim 7
Dependent Claim
15 words
A process according to claim 1, wherein the contact time is less than 1 minute.
Claim 8
Dependent Claim
27 words
A process according to claim 1, wherein the solution or suspension of sodium silicate is admixed with the detergent slurry adjacent to or in the spray nozzle.
Claim 9
Dependent Claim
27 words
A process according to claim 1, wherein the sodium aluminosilicate is an amorphous sodium aluminosilicate having the formula 0.8-1.5Na 2 O.Al 2 O 3 .1.5-3.5SiO 2 .
Claim 10
Dependent Claim
27 words
A process according to claim 1, wherein the sodium aluminosilicate is a crystalline sodium aluminosilicate having the formula 0.8-1.5Na 2 O.Al 2 O 3 .1.5-3.5SiO 2 .
Claim 11
Dependent Claim
19 words
A process according to claim 9, wherein the sodium aluminosilicate is zeolite A or X or a mixture thereof.
Claim 12
Dependent Claim
24 words
A process according to claim 1, wherein the spray dried detergent powder has a residual water content of at least about 10% by weight.
Claim 13
Dependent Claim
20 words
A process according to claim 11, wherein the residual water content is from about 12% to about 20% by weight.
Claim 14
Dependent Claim
11 words
A detergent composition made by a process according to claim 1.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1984-01-06 | 1984-07-07 | 1985-01-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-01-06 | 1988-07-07 | 1989-01-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-01-06 | 1992-07-07 | 1993-01-06 | $7700.00 | Window Closed / Lapsed |