US4503158A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Double or mixed silicates of alkali metal and other glass modifier metal(s) used to prepare glass compositions
Assignee: Rhone Poulenc Industries SA
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Filing: 1983-04-13
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Granted: 1985-03-05
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Expires: 2003-04-13
Abstract
Abstract An at least double silicate of an alkali metal and at least one other metal is prepared by interreacting (i) an aqueous solution of an alkali metal silicate and (ii) a solution of an oxide of such at least one other metal, or salt thereof, in the presence of (iii) a water-miscible polar organic liquid, whereby said at least double silicate is suspended in the organic reaction medium in insoluble and finely divided form. The separated product is an admirable glass-former.
Inventors
- 👤 Christian Richard
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 12:17
CPC Classifications
C; C01; C01B; C01B33/00; C01B33/113; C01B33/12; C01B33/18; C01B33/187; C01B33/20; C01B33/24; C01B33/32; C01B33/325; C03; C03C; C03C1/00; C03C1/006; C03C3/00; C03C3/04; C03C3/076; C03C3/102; C01P; C01P2002/00; C01P2002/50; C01P2002/52; C01P2002/80; C01P2002/82; C01P2002/88; C01P2004/00; C01P2004/80; C01P2004/82; C01P2004/84; C01P2006/00; C01P2006/80; C01P2006/82
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
110 words
In a process for the preparation of an at least double silicate of an alkali metal and at least one other metal, said process comprising interreacting: (i) an aqueous solution an alkali metal silicate which is alkaline and comprises a glass forming oxide and (ii) a solution of an oxide of such at least one other metal, or salt thereof, which is acidic and comprises a glass modifying oxide, the improvement which comprises effecting said interreacting directly and rapidly with agitation in the presence of (iii) a water-miscible polar organic liquid, whereby said at least double silicate is suspended in the organic reaction medium in insoluble and finely divided form.
Claim 2
Dependent Claim
110 words
In a process for the preparation of an at least double silicate of an alkali metal and at least one other metal, said process comprising interreacting: (i) an aqueous solution an alkali metal silicate which is alkaline and comprises a glass forming oxide and (ii) a solution of an oxide of such at least one other metal, or salt thereof, which is acidic and comprises a glass modifying oxide, the improvement which comprises effecting said interreacting directly and rapidly with agitation in the presence of (iii) a water-miscible polar organic liquid, whereby said at least double silicate is suspended in the organic reaction medium in insoluble and finely divided form.
Claim 3
Dependent Claim
28 words
The process as defined by claim 1, said water-miscible polar organic liquid (iii) being first added to the solution (ii), and then the solution (i) being added thereto.
Claim 4
Dependent Claim
12 words
The process as defined by claim 2, said liquid (iii) comprising methanol.
Claim 5
Dependent Claim
27 words
The process as defined by claim 1, said solution (i) further comprising B 2 O 3 , P 2 O 5 or Al 2 O 3 .
Claim 6
Dependent Claim
19 words
The process as defined by claim 1, said solution (ii) further comprising boric acid, phosphoric acid, or aluminum nitrate.
Claim 7
Dependent Claim
25 words
The process as defined by claim 1, said at least double silicate being filtered, and then mixed with boric acid, phosphoric acid or aluminum nitrate.
Claim 8
Dependent Claim
22 words
The process as defined by claim 1, the alkali metal silicate which comprises the solution (i) comprising a sodium or potassium silicate.
Claim 9
Dependent Claim
16 words
The process as defined by claim 1, said water-miscible polar organic liquid (iii) comprising an alcohol.
Claim 10
Dependent Claim
15 words
The process as defined by claim 1, said solution (ii) comprising a nitric acid solution.
Claim 11
Dependent Claim
37 words
The process as defined by claim 1, the polar organic liquid (iii) being added to the silicate solution (i), and an aqueous acid solution (ii) of salt of said at least one other metal being added thereto.
Claim 12
Dependent Claim
29 words
The process as defined by claim 1, said solution (i) being added to a methanolic solution of said oxide of such at least one other metal, or salt thereof.
Claim 13
Dependent Claim
21 words
The process as defined by claim 1, wherein the source of at least one of the oxides comprises a natural mineral.
Claim 14
Dependent Claim
20 words
The product of the process as defined by claim 1, low temperature eutectic in behavior and rapidly fused and fined.
Claim 15
Dependent Claim
10 words
A glass comprising the product as defined by claim 13.
Claim 16
Dependent Claim
47 words
The process according to claim 1, wherein the molar ratio of the solution of alkali metal silicate from which the metal silicates forming the mixture will be precipitated is first determined: ##EQU5## which is then followed by preparation of the alkaline solution having the molar ratio ##EQU6##
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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) | 1988-03-04 | 1988-09-03 | 1989-03-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-03-04 | 1992-09-03 | 1993-03-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-03-04 | 1996-09-03 | 1997-03-05 | $7700.00 | Window Closed / Lapsed |