Patent US3709801A successfully refreshed from Google Patents.
US3709801A
Expired / Lapsed
US
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Production of alkyl silicates
Assignee: Monsanto Chemicals Ltd
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Filing: 1970-02-10
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Granted: 1973-01-09
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Expires: 1990-02-10
Abstract
Abstract This invention involves the production of an alkyl silicate in which the alkyl group has from one to three carbon atoms involving the passage of an electric current through a liquid medium comprising a solution of a monohydric alcohol having from one to three carbon atoms per molecule and as a supporting electrolyte an acid or metal salt compatible with the monohydric alcohol with no more than 3 percent by weight of water based on the weight of the monohydric alcohol being present using a silicon anode and passing the electric current until alkyl silicates are present in the liquid medium.
Inventors
- 👤 T Tripp
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 19:10
CPC Classifications
C; C25; C25B; C25B3/00; C25B3/20; C25B3/23; C25B3/01
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
20 words
A process according to claim 1 wherein said liquid medium contains not more than 1 percent by weight of water.
Claim 2
Dependent Claim
21 words
A process according to claim 2 wherein said liquid medium contains from about 0 to about 0.5 weight percent of water.
Claim 3
Dependent Claim
28 words
A process according to claim 3 wherein the supporting electrolyte is selected from the group consisting of sulfuric acid, hydrochloric acid, a metal chloride, and a metal sulfate.
Claim 4
Dependent Claim
26 words
A process according to claim 4 wherein said supporting electrolyte is selected from the group consisting of hydrochloric acid, sulfuric acid, ferric sulfate and zinc chloride.
Claim 5
Dependent Claim
12 words
A process according to claim 5 wherein said liquid medium is anhydrous.
Claim 6
Dependent Claim
40 words
A process according to claim 5 wherein the supporting electrolyte is sulfuric acid or hydrochloric acid and is present in said liquid medium from about 0.1 to about 5 percent by weight, based on the weight of the liquid medium.
Claim 7
Dependent Claim
39 words
A process according to claim 7 in which the passage of the electric current is continued until the liquid medium contains from about 25 percent to about 30 percent by weight of the silicon compounds in terms of silica.
Claim 8
Dependent Claim
23 words
A process according to claim 8 in which the anode is a ferro-silicon containing from 60 to 99 percent by weight of silicon.
Claim 9
Dependent Claim
20 words
A process according to claim 9 where the process is conducted at substantially the boiling point of the liquid medium.
Claim 10
Dependent Claim
42 words
A process according to claim 9 in which the liquid medium is a solution having a specific conductivity of at least 3.0 X 10 3 ohm1, cm 1 to about 3.0 X 10 5 ohm 1, cm 1 at the operating temperature.
References Cited (Backward Citations)
GB1136016A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-01-09 | 1976-07-10 | 1977-01-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-01-09 | 1980-07-10 | 1981-01-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-01-09 | 1984-07-10 | 1985-01-09 | $7700.00 | Window Closed / Lapsed |