US4387017A
Expired / Lapsed
US
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Demulsification of bitumen emulsions using polymers of diquaternary ammonium monomers containing hydroxyl groups
Assignee: Texaco Inc
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Filing: 1981-12-02
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Granted: 1983-06-07
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Expires: 2001-12-02
Abstract
Abstract A process for recovering bitumen from oil-in-water (O/W) emulsions is disclosed wherein water soluble demulsifiers are used. These demulsifiers are polymers of diquaternary ammonium monomers containing hydroxyl groups. 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
- 👤 Edward E. McEntire
- 👤 David R. McCoy
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 07:15
CPC Classifications
C; C10; C10G; C10G33/00; C10G33/04
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
118 words
A process for recovering petroleum from O/W bitumen emulsions by demulsifying said emulsions by adding thereto demulsifiers comprising polymers prepared from the monomer having the following structure ##STR6## R=H, CH 3 ; R 2 -R 6 are independently CH 3 , C 2 H 5 , lower alkyl including branched alkyl, hydroxyethyl, hydroxypropyl; X=NHR 7 or OR 7 , where R 7 is an alkylene or branched alkylene group such as CH 2 CH 2 , CH 2 CH 2 CH 2 having at least two carbon atoms and CH 2 C(CH 3 ) 2 CH 2 ; and Y and Z are independently halogen, carboxylate such as acetate or other anion from an acid of pKa <5.
Claim 2
Dependent Claim
118 words
A process for recovering petroleum from O/W bitumen emulsions by demulsifying said emulsions by adding thereto demulsifiers comprising polymers prepared from the monomer having the following structure ##STR6## R=H, CH 3 ; R 2 -R 6 are independently CH 3 , C 2 H 5 , lower alkyl including branched alkyl, hydroxyethyl, hydroxypropyl; X=NHR 7 or OR 7 , where R 7 is an alkylene or branched alkylene group such as CH 2 CH 2 , CH 2 CH 2 CH 2 having at least two carbon atoms and CH 2 C(CH 3 ) 2 CH 2 ; and Y and Z are independently halogen, carboxylate such as acetate or other anion from an acid of pKa <5.
Claim 3
Dependent Claim
13 words
A process as in claim 1 wherein the monomer has the structure: ##STR7##
Claim 4
Dependent Claim
13 words
A process as in claim 1 wherein the monomer has the structure: ##STR8##
Claim 5
Dependent Claim
13 words
A process as in claim 1 wherein the monomer has the structure: ##STR9##
Claim 6
Dependent Claim
19 words
A process as in claim 1 wherein the monomer has the structure: ##STR10## wherein R=H or CH 3 .
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) | 1986-06-06 | 1986-12-06 | 1987-06-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-06-06 | 1990-12-06 | 1991-06-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-06-06 | 1994-12-06 | 1995-06-07 | $7700.00 | Window Closed / Lapsed |