US3779908A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Coalescence of water and oleophilic liquid dispersions by passage through a permeable, oleophilic liquid equilibrated, foam of polyurethane
Assignee: ConocoPhillips Co
•
Filing: 1973-03-19
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Granted: 1973-12-18
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Expires: 1993-03-19
Abstract
Abstract Dispersions of an oleophilic liquid and water are coalesced by passing through a permeable, non-fibrous, consolidated bed of a polyurethane foam which is equilibrated with respect to sorption of the oleophilic liquid.
Inventors
- 👤 Gregory M Duane
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 20:51
CPC Classifications
B; B01; B01D; B01D17/00; B01D17/02; B01D17/04; B01D17/045; C; C10; C10G; C10G33/00; C10G33/06; Y; Y10; Y10S; Y10S210/00; Y10S210/05
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
63 words
The improvement of claim 1 wherein the dispersion is a dispersion of a liquid petroleum hydrocarbon in water, wherein the liquid petroleum hydrocarbon dispersed phase comprises a trace to about 1 part by weight of liquid petroleum hydrocarbon per 100 parts by weight of water, and wherein the coalesced liquid petroleum hydrocarbon is separated from the water by gravity separation subsequent to coalescence.
Claim 2
Dependent Claim
26 words
The improvement of claim 2 wherein the liquid petroleum hydrocarbon is a crude oil, and the dispersion is the aqueous effluent from a conventional API separator.
Claim 3
Dependent Claim
43 words
The improvement of claim 2 wherein the liquid petroleum hydrocarbon is a crude oil, wherein the dispersion contains about 50 to about 350 ppm of crude oil, and wherein the depth of the polyurethane foam bed is about 3.5 to about 12 inches.
Claim 4
Dependent Claim
18 words
The improvement of claim 1, wherein the dispersion is a dispersion of water in a liquid petroleum hydrocarbon.
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) | 1976-12-17 | 1977-06-18 | 1977-12-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-12-17 | 1981-06-18 | 1981-12-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-12-17 | 1985-06-18 | 1985-12-18 | $7700.00 | Window Closed / Lapsed |