US4031024A
Expired / Lapsed
US
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Process for improving the stability and shaping of anhydrous sodium metasilicate, and the compositions containing same, and the resulting products
Assignee: Francaise des Silicates Speciauz (Sifrance) SA
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Filing: 1975-06-09
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Granted: 1977-06-21
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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 at least one gluconic 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
2026-10-27 23:28
CPC Classifications
C; C01; C01B; C01B33/00; C01B33/20; C01B33/32; C01B33/325; C11; C11D; C11D3/00; C11D3/02; C11D3/04; C11D3/08
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
102 words
A process for improving the stability and facilitating the form of sodium metasilicate containing by weight less than 10% of water, and the compositions containing same, characterized in that said sodium metasilicate is combined with at least one gluconic compound selected from the group consisting of gluconic acid and water soluble sodium salts thereof in the ratio of 100 grams of sodium metasilicate per 2 to 10 cm 3 of a saturated aqueous solution of the gluconic compound, and 1-10% by weight of a non-ionic surface active agent, to obtain a particulate product having improved resistance to caking and formation of dust.
Claim 2
Dependent Claim
102 words
A process for improving the stability and facilitating the form of sodium metasilicate containing by weight less than 10% of water, and the compositions containing same, characterized in that said sodium metasilicate is combined with at least one gluconic compound selected from the group consisting of gluconic acid and water soluble sodium salts thereof in the ratio of 100 grams of sodium metasilicate per 2 to 10 cm 3 of a saturated aqueous solution of the gluconic compound, and 1-10% by weight of a non-ionic surface active agent, to obtain a particulate product having improved resistance to caking and formation of dust.
Claim 3
Dependent Claim
15 words
A process according to claim 1, characterized in that the gluconic compound comprises gluconic acid.
Claim 4
Dependent Claim
15 words
A process according to claim 1, characterized in that the gluconic compound comprises sodium gluconate.
Claim 5
Dependent Claim
28 words
A process according to claim 1, characterized in that the sodium metasilicate is treated by spraying an aqueous solution of at least one gluconic compound over said metasilicate.
Claim 6
Dependent Claim
18 words
A process according to claim 1, characterized in that the non-ionic surface active agent comprises an ethoxylated derivative.
Claim 7
Dependent Claim
19 words
A process according to claim 5, characterized in that said composition contains from 1 to 10% of ethoxylated nonylphenol.
Claim 8
Dependent Claim
74 words
A particulate sodium metasilicate combined with a gluconic compound selected from the group consisting of gluconic acid and a sodium salt of gluconic acid in which the gluconic acid compound is present in the amount of 2 to 10 cm 3 of a saturated aqueous solution per 100 grams of sodium metasilicate, and 1-10% by weight of a non-ionic surface active agent, the resulting product having improved resistance to caking and formation of dust.
Claim 9
Dependent Claim
74 words
A particulate sodium metasilicate combined with a gluconic compound selected from the group consisting of gluconic acid and a sodium salt of gluconic acid in which the gluconic acid compound is present in the amount of 2 to 10 cm 3 of a saturated aqueous solution per 100 grams of sodium metasilicate, and 1-10% by weight of a non-ionic surface active agent, the resulting product having improved resistance to caking and formation of dust.
Claim 10
Dependent Claim
16 words
A sodium metasilicate as claimed in claim 7 in which the gluconic compound is sodium gluconate.
Claim 11
Dependent Claim
16 words
A sodium metasilicate as claimed in claim 7 in which the gluconic compound is gluconic acid.
Claim 12
Dependent Claim
55 words
A particulate composition containing by weight from 20% to 60% of sodium metasilicate, from 0.2% to 2% of gluconic compound selected from the group consisting of gluconic acid and sodium salt thereof, and from 1% to 5% of a non-ionic surface active agent, the resulting product having improved resistance to caking and formation of dust.
Claim 13
Dependent Claim
55 words
A particulate composition containing by weight from 20% to 60% of sodium metasilicate, from 0.2% to 2% of gluconic compound selected from the group consisting of gluconic acid and sodium salt thereof, and from 1% to 5% of a non-ionic surface active agent, the resulting product having improved resistance to caking and formation of dust.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1980-06-20 | 1980-12-20 | 1981-06-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-06-20 | 1984-12-20 | 1985-06-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-06-20 | 1988-12-20 | 1989-06-21 | $7700.00 | Window Closed / Lapsed |