US4411775A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Demulsification of bitumen emulsions using water soluble epoxy-containing polyethers
Assignee: Texaco Inc
•
Filing: 1981-12-02
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Granted: 1983-10-25
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Expires: 2001-12-02
Abstract
Abstract A process for recovering bitumem from oil-in-water (O/W) emulsions is disclosed wherein water soluble demulsifiers are used. These demulsifiers are water soluble polyethers prepared by the reaction between certain diepoxides and poly(ethyleneoxy) glycols. To resolve the bituminous petroleum emulsions, the process is carried out between 25° and 160° C. wherein the demulsifier of the invention is contacted with the bituminous emulsion.
Inventors
- 👤 David R. McCoy
- 👤 Michael Cuscurida
- 👤 George P. Speranza
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 11:23
CPC Classifications
C; C10; C10G; C10G33/00; C10G33/04; B; B01; B01D; B01D17/00; B01D17/02; B01D17/04; B01D17/047
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
73 words
A process for recovering petroleum from oil-in-water (O/W) bitumen emulsions by demulsifying said emulsions comprising contacting the emulsions at a temperature of from between about 25° and 160° C. with water soluble polyethers prepared from the acid- or base-catalyzed reaction of poly(ethyleneoxy) glycols of the structure HO(CH.sub.2 CH.sub.2 O).sub.n H where n=40 to 250 with 0.5-10 wt.% diepoxides of ≦600 molecular weight of the general structure ##STR2## wherein R' is an aromatic group.
Claim 2
Dependent Claim
73 words
A process for recovering petroleum from oil-in-water (O/W) bitumen emulsions by demulsifying said emulsions comprising contacting the emulsions at a temperature of from between about 25° and 160° C. with water soluble polyethers prepared from the acid- or base-catalyzed reaction of poly(ethyleneoxy) glycols of the structure HO(CH.sub.2 CH.sub.2 O).sub.n H where n=40 to 250 with 0.5-10 wt.% diepoxides of ≦600 molecular weight of the general structure ##STR2## wherein R' is an aromatic group.
Claim 3
Dependent Claim
12 words
A process as in claim 1 where R' also contains ether groups.
Claim 4
Dependent Claim
18 words
A process as in claim 1 or 2 wherein the diepoxide is the diglycidyl ether of Bisphenol A.
Claim 5
Dependent Claim
31 words
A process as in claim 1 wherein the reaction between the poly(ethyleneoxy) glycols and diepoxides takes place at temperatures ranging from 20° to 200° C. in the presence of a catalyst.
Claim 6
Dependent Claim
20 words
A process as in claim 4 wherein the reaction takes place at temperatures ranging from about 60° to 150° C.
References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1986-10-24 | 1987-04-25 | 1987-10-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-10-24 | 1991-04-25 | 1991-10-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-10-24 | 1995-04-25 | 1995-10-25 | $7700.00 | Window Closed / Lapsed |