US3715224A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Soluble and colloidal silicates
Assignee: Corning Glass Works
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Filing: 1970-06-12
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Granted: 1973-02-06
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Expires: 1990-06-12
Abstract
Abstract This invention relates to the production of solutions and/or colloidal suspensions of water-soluble silicates containing certain monovalent and divalent cations which normally result in water-insoluble silicates. The process involves reacting in water a compound of the monovalent and/or divalent cations with a chelating or complexing agent exhibiting stability at a pH greater than 7 to yield a solution and/or colloidal suspension of complexed silicates. Where desired, the said solution and/or colloidal suspension can be cured to a solid body.
Inventors
- 👤 L Campbell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 09:54
CPC Classifications
C; C04; C04B; C04B28/00; C04B28/24; C01; C01B; C01B33/00; C01B33/20
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
125 words
A method for making an alkaline aqueous silicate solution and/or colloidal suspension containing at least one cation selected from the group consisting of Ag , Cu , Cd 2, Ca 2, Sr 2, Ba 2, Co 2, Pb 2, Mg 2, Hg 2, Ni 2, Zn 2, and Mn 2 which comprises reacting said cation in the presence of water with silicate ion and a complexing agent selected from the group consisting of an organic acidic complexing agent containing at least four carbon atoms and an organic amine complexing agent containing at least two carbon atoms exhibiting stability at a pH greater than 7, said reaction mixture demonstrating a pH greater than 7, to produce an aqueous solution and/or colloidal suspension of a complexed silicate.
Claim 2
Independent Claim
125 words
A method for making an alkaline aqueous silicate solution and/or colloidal suspension containing at least one cation selected from the group consisting of Ag , Cu , Cd 2, Ca 2, Sr 2, Ba 2, Co 2, Pb 2, Mg 2, Hg 2, Ni 2, Zn 2, and Mn 2 which comprises reacting said cation in the presence of water with silicate ion and a complexing agent selected from the group consisting of an organic acidic complexing agent containing at least four carbon atoms and an organic amine complexing agent containing at least two carbon atoms exhibiting stability at a pH greater than 7, said reaction mixture demonstrating a pH greater than 7, to produce an aqueous solution and/or colloidal suspension of a complexed silicate.
Claim 3
Dependent Claim
28 words
A method according to claim 1 wherein said organic acidic complexing Agent is selected from the group consisting of ethylenediaminetetraacetic acid, nitrilotriacetic acid, tartaric acid, and 1,2-diaminocyclohexanetetracetic acid.
Claim 4
Dependent Claim
26 words
A method according to claim 1 wherein said organic amine complexing agent is selected from the group consisting of diethylenetriamine, ethylenediamine, 1,2propylene diamine, triaminotriethylamine, and triethylenetetraamine.
Claim 5
Dependent Claim
17 words
A method according to claim 1 wherein the mole ratio SiO2: cation oxide is greater than 1:2.
Claim 6
Dependent Claim
25 words
A method according to claim 4 wherein at least 99 weight percent of the cation oxide is complexed to produce a transparent or translucent solution.
Claim 7
Dependent Claim
19 words
A method according to claim 4 wherein the mole ratio SiO2: cation oxide is between about 4:1 to 100:1.
Claim 8
Dependent Claim
25 words
A method according to claim 1 wherein the reaction mixture to produce said aqueous solution of a complexed silicate demonstrates a pH between about 10.5-15.
Claim 9
Dependent Claim
26 words
A method according to claim 1 wherein the reaction mixture to produce said aqueous colloidal suspension of a complex silicate demonstrates a pH between about 7-10.5.
Claim 10
Dependent Claim
32 words
A method according to claim 1 wherein said aqueous solution and/or colloidal suspension of a complexed silicate is combined with a water soluble compound exhibiting stability at a pH greater than 7.
References Cited (Backward Citations)
US1949914A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-02-06 | 1976-08-07 | 1977-02-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-02-06 | 1980-08-07 | 1981-02-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-02-06 | 1984-08-07 | 1985-02-06 | $7700.00 | Window Closed / Lapsed |