Patent US3625856A successfully refreshed from Google Patents.
US3625856A
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Method of producing organosols
Assignee: ChampionX LLC
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Filing: 1970-11-16
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Granted: 1971-12-07
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Expires: 1990-11-16
Abstract
Abstract A method of producing stable organosols, including pure metal oxide sols and coated silica sols, is accomplished by the means of an extraction reagent and an organic, water-immiscible solvent.
Inventors
- 👤 David P Schaefer
- 👤 James F Kovarik
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 13:53
CPC Classifications
B; B01; B01J; B01J13/00; B01J13/0004; B01J13/0026
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
20 words
The method of claim 1 in which the sol in the aqueous solvent is a positively charged metal oxide sol.
Claim 2
Dependent Claim
30 words
The method of claim 1 in which the sol in the aqueous solvent is a coated silica sol selected from the group consisting of iron, alumina, and chromium-oxide-coated silica sols.
Claim 3
Dependent Claim
27 words
The method of claim 1 in which the organic solvent is selected from the group consisting of hexane, benzene, kerosene, carbon tetrachloride, heptane, perchloroethylene, and methylisobutyl ketone.
Claim 4
Dependent Claim
14 words
The method of claim 1 in which the extraction reagent is potassium di(2-ethylhexyl) phosphate.
Claim 5
Dependent Claim
33 words
The method of claim 1 in which the extraction reagent is an organic-soluble salt of an alkyl acid, said acid being selected from the group consisting of phosphoric, phosphonic, thiophosphoric, sulfuric and carboxylic.
Claim 6
Dependent Claim
23 words
The method of claim 1 in which the extraction reagent ranges from 10.0 to 40.0 percent by weight based on the organic solvent.
Claim 7
Dependent Claim
23 words
The method of claim 1 in which the extraction reagent ranges from 15.0 to 35.0 percent by weight based on the organic solvent.
Claim 8
Dependent Claim
22 words
The method of claim 1 in which the extraction reagent ranges from 25.0 to 35.0 percent by weight based on organic solvent.
Claim 9
Dependent Claim
24 words
The method of claim 1 in which the sol in the aqueous solvent contains from 1 to 60 percent by weight of sol particles.
Claim 10
Dependent Claim
23 words
The method of claim 1 in which the ratio of the aqueous solvent to organic solvent ranges from 20:80 to 80:20 by weight.
Claim 11
Dependent Claim
21 words
The method of claim 1 in which the organosol product contains from 5 to 60 percent by weight of sol particles.
References Cited (Backward Citations)
US3312630A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-12-06 | 1975-06-07 | 1975-12-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-12-06 | 1979-06-07 | 1979-12-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-12-06 | 1983-06-07 | 1983-12-07 | $7700.00 | Window Closed / Lapsed |