US4965015A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Detergent composition and process for its production
Assignee: Fujimi Inc
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Filing: 1989-10-17
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Granted: 1990-10-23
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Expires: 2009-10-17
Abstract
Abstract A process for producing aluminosilicate-built spray-dried detergent powders containing silicate comprises spraying a detergent slurry containing aluminosilicate into a spray-drying tower and simultaneously spraying in an aqueous solution of sodium silicate The resulting powders contain characteristic composite granules.
Inventors
- 👤 Michael J. H. Heybourne
- 👤 Peter C. Knight
- 👤 Antonio Malguzzin
- 👤 Daniele Miotti
- 👤 Andrew W. Travill, deceased
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 22:00
CPC Classifications
C; C11; C11D; C11D3/00; C11D3/02; C11D3/04; C11D3/08; C11D11/00; C11D11/02; C11D3/12; C11D3/124; C11D3/1246; C11D3/128
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
125 words
A process for the production of a spray-dried detergent powder comprising crystalline or amorphous alkali metal aluminosilicate, and one or more anionic or nonionic detergent active compounds which process comprises the steps of (i) spraying into a spray-drying tower an aqueous slurry comprising a crystalline or amorphous alkali metal aluminosilicate and 5 to 40% by weight of final powder of one or more anionic or nonionic detergent active compounds, and (ii) simultaneously spraying an aqueous solution of alkali metal silicate separately into the tower, which solution contains at least 20% by weight of alkali metal silicate, whereby droplets of the alkali metal silicate solution encounter droplets of the slurry, or powder so as to form composite granules with alkali metal silicate at the exterior thereof.
Claim 2
Dependent Claim
125 words
A process for the production of a spray-dried detergent powder comprising crystalline or amorphous alkali metal aluminosilicate, and one or more anionic or nonionic detergent active compounds which process comprises the steps of (i) spraying into a spray-drying tower an aqueous slurry comprising a crystalline or amorphous alkali metal aluminosilicate and 5 to 40% by weight of final powder of one or more anionic or nonionic detergent active compounds, and (ii) simultaneously spraying an aqueous solution of alkali metal silicate separately into the tower, which solution contains at least 20% by weight of alkali metal silicate, whereby droplets of the alkali metal silicate solution encounter droplets of the slurry, or powder so as to form composite granules with alkali metal silicate at the exterior thereof.
Claim 3
Dependent Claim
34 words
A process as claimed in claim 1 wherein the slurry is sprayed downwardly and the alkali metal silicate solution is sprayed upwardly from a position below the level at which the slurry is sprayed.
Claim 4
Dependent Claim
23 words
A process as claimed in claim 1 wherein the temperature of the sprayed in alkali metal silicate solution is 30° C. or lower.
Claim 5
Dependent Claim
21 words
Process according to claim 1 wherein said alkali metal aluminosilicate constitutes from 10 to 60% by weight of the final powder.
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) | 1993-10-22 | 1994-04-23 | 1994-10-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-10-22 | 1998-04-23 | 1998-10-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-10-22 | 2002-04-23 | 2002-10-23 | $7700.00 | Window Closed / Lapsed |