US4151259A
Expired / Lapsed
US
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Use of oil-water emulsions in a hydrothermal process
Assignee: Hexion Inc
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Filing: 1978-03-27
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Granted: 1979-04-24
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Expires: 1998-03-27
Abstract
Abstract This invention relates to hydrothermal processes, such as defluorination of phosphate rock, wherein the novel feature resides in the use of an emulsion of water and fuel oil.
Inventors
- 👤 Clinton A. Hollingsworth
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 23:11
CPC Classifications
C; C01; C01B; C01B25/00; C01B25/16; C01B25/26; C01B25/32; C01B25/328
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
48 words
Process for defluorinating particulate phosphate rock feed comprising the steps of combusting an emulsion of fuel oil and water containing in excess of about 5% water to produce products of combustion, which include water vapor; contacting products of combustion with the particulate feed; and recovering a particulate product.
Claim 2
Dependent Claim
48 words
Process for defluorinating particulate phosphate rock feed comprising the steps of combusting an emulsion of fuel oil and water containing in excess of about 5% water to produce products of combustion, which include water vapor; contacting products of combustion with the particulate feed; and recovering a particulate product.
Claim 3
Dependent Claim
35 words
Process of claim 1 wherein the emulsion contains in excess of about 20% water and the particulate feed contains fluorine, most of which is removed when the products of combustion and water vapor contact same.
Claim 4
Dependent Claim
48 words
Process of claim 2 including the step of moving the particulate feed along a downwardly inclined surface while passing the products of combustion therethrough and recovering a product having relatively fine porous particles with a substantial reduction of oversize when compared to an operation using straight fuel oil.
Claim 5
Dependent Claim
12 words
Process of claim 3 wherein the inclined surface is a rotating cylinder.
Claim 6
Dependent Claim
19 words
Process of claim 4 wherein the emulsion contains in excess of about 20% and up to about 70% water.
Claim 7
Dependent Claim
31 words
Process of claim 4 wherein the emulsion is combusted with approximately a stoichiometric amount of air and the products of combustion contact the particulate feed while the feed is in motion.
Claim 8
Dependent Claim
32 words
Process of claim 2 wherein the emulsion contains up to about 70% water, the particulate feed contains up to about 4% fluorine and the particulate product contains less than about 0.18% fluorine.
Claim 9
Dependent Claim
19 words
Process of claim 2 including the step of fluidizing the particulate feed while passing the products of combustion therethrough.
Claim 10
Dependent Claim
24 words
Process of claims 8 or 3 wherein the fuel oil is selected from No. 5 fuel oil, No. 6 fuel oil and mixtures thereof.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1982-04-23 | 1982-10-23 | 1983-04-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-04-23 | 1986-10-23 | 1987-04-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-04-23 | 1990-10-23 | 1991-04-24 | $7700.00 | Window Closed / Lapsed |