US3996399A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for improving the stability and shaping of anhydrous sodium metasilicate, and the products, and compositions containing same
Assignee: Francaise des Silicates Speciauz (Sifrance) SA
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Filing: 1975-06-09
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Granted: 1976-12-07
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Expires: 1995-06-09
Abstract
Abstract The invention concerns a process for improving the stability and form of substantially anhydrous sodium metasilicate, and the compositions containing same, and the resulting products. According to the invention, sodium metasilicate is treated with a phosphoric compound. The present invention is used in particular for detergent compositions.
Inventors
- 👤 Georges Vrisakis
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 20:00
CPC Classifications
C; C11; C11D; C11D3/00; C11D3/02; C11D3/04; C11D3/08; C01; C01B; C01B33/00; C01B33/20; C01B33/32; C01B33/325
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
82 words
A process for improving the stability and minimizing agglomeration and disintegration of sodium metasilicate particles consisting essentially of providing a sodium metasilicate having less than 10% by weight water, treating the sodium metasilicate particles with monosodium phosphate by mixing the sodium metasilicate particles with monosodium phosphate in powder form or by coating the sodium metasilicate particles with an aqueous solution of monosodium phosphate, in the ratio of 20-60 parts by weight sodium metasilicate to 0.2 to 2 parts by weight monosodium phosphate.
Claim 2
Dependent Claim
82 words
A process for improving the stability and minimizing agglomeration and disintegration of sodium metasilicate particles consisting essentially of providing a sodium metasilicate having less than 10% by weight water, treating the sodium metasilicate particles with monosodium phosphate by mixing the sodium metasilicate particles with monosodium phosphate in powder form or by coating the sodium metasilicate particles with an aqueous solution of monosodium phosphate, in the ratio of 20-60 parts by weight sodium metasilicate to 0.2 to 2 parts by weight monosodium phosphate.
Claim 3
Dependent Claim
21 words
A process according to claim 1 in which the sodium metasilicate is coated with an aqueous solution of the monosodium phosphate.
Claim 4
Dependent Claim
19 words
A process according to claim 2 in which the sodium metasilicate is coated by spraying with the aqueous solution.
Claim 5
Dependent Claim
37 words
A process according to claim 1 which includes mixing a non-ionic surface active agent with the treated sodium metasilicate wherein the non-ionic surface active agent is present in an amount within the range of 1-5% by weight.
Claim 6
Dependent Claim
17 words
A process according to claim 4, in which the non-ionic surface active agent is an ethoxylated derivative.
Claim 7
Dependent Claim
14 words
A process according to claim 5, in which the ethoxylated derivative is ethoxylated nonylphenol.
Claim 8
Dependent Claim
22 words
A novel product comprising sodium metasilicate which has been coated or mixed with monosodium phosphate by the 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) | 1979-12-07 | 1980-06-07 | 1980-12-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-12-07 | 1984-06-07 | 1984-12-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-12-07 | 1988-06-07 | 1988-12-07 | $7700.00 | Window Closed / Lapsed |