US4459220A
Expired / Lapsed
US
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Block polymers of alkanolamines as demulsifiers for O/W emulsions
Assignee: Baker Petrolite LLC
•
Filing: 1983-06-02
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Granted: 1984-07-10
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Expires: 2003-06-02
Abstract
Abstract This invention relates to block polymers of polyalkanolamine, for example a polymer where one block is polyethanolamine and the other block is polypropanolamine, etc.; and to uses thereof, for example as demulsifiers.
Inventors
- 👤 Thomas J. Bellos
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 02:57
CPC Classifications
C; C08; C08G; C08G73/00; C08G73/02
Claims Analysis
Total Claims: 21
Claim 1
Independent Claim
27 words
A process of demulsifying O/W emulsions which is characterized by treatment with a block polymer of polyalkanolamines, wherein each block is a different alkanolamines dehydration condensation product.
Claim 2
Dependent Claim
27 words
A process of demulsifying O/W emulsions which is characterized by treatment with a block polymer of polyalkanolamines, wherein each block is a different alkanolamines dehydration condensation product.
Claim 3
Dependent Claim
17 words
A process of claim 1 wherein said block polymer is a salt, a quaternary, or a complex.
Claim 4
Dependent Claim
22 words
A process of claim 1 wherein one block is derived from an ethanolamine and a second block is derived from a propanolamine.
Claim 5
Dependent Claim
17 words
A process of claim 3 wherein said block polymer is a salt, a quaternary or a complex.
Claim 6
Dependent Claim
22 words
A process of claim 3 wherein one block is derived primarily from triethanolamine and said second block is derived primarily from tripropanolamine.
Claim 7
Dependent Claim
17 words
A process of claim 5 wherein said block polymer is a salt, a quaternary or a complex.
Claim 8
Dependent Claim
21 words
A process of claim 1 wherein at least one of the alkanolamine moieties contained in said block polymer is a monoamine.
Claim 9
Dependent Claim
17 words
A process of claim 7 wherein said block polymer is a salt, a quaternary or a complex.
Claim 10
Dependent Claim
14 words
A process of claim 1 wherein said block polymer contains a polyalkanol piperazine moiety.
Claim 11
Dependent Claim
17 words
A process of claim 9 wherein said block polymer is a salt, a quaternary or a complex.
Claim 12
Dependent Claim
14 words
A process of claim 1 wherein said block polymer contains a polyalkanol benzylamine moiety.
Claim 13
Dependent Claim
17 words
A process of claim 11 wherein said block polymer is a salt, a quaternary or a complex.
Claim 14
Dependent Claim
14 words
A process of claim 1 wherein said block polymer contains a polyalkanol polyamine moiety.
Claim 15
Dependent Claim
17 words
A process of claim 13 wherein said block polymer is a salt, a quaternary or a complex.
Claim 16
Dependent Claim
28 words
A process of claim 1 wherein at least one block of said block polymer is derived from an alkanolamine starting material which contains both ethanol and propanol groups.
Claim 17
Dependent Claim
17 words
A process of claim 15 wherein said block polymer is a salt, a quaternary or a complex.
Claim 18
Dependent Claim
22 words
A process of claim 1 wherein at least one of the alkanolamine amine moieties contained in said block polymer is a polyamine.
Claim 19
Dependent Claim
17 words
A process of claim 17 wherein said block polymer is a salt, a quaternary or a complex.
Claim 20
Dependent Claim
23 words
A process of claim 1 wherein at least one of the alkanol amine moieties contained in said block polymer is a cyclic amine.
Claim 21
Dependent Claim
17 words
A process of claim 19 wherein said block polymer is a salt, a quaternary or a complex.
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) | 1987-07-10 | 1988-01-09 | 1988-07-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-07-10 | 1992-01-09 | 1992-07-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-07-10 | 1996-01-09 | 1996-07-10 | $7700.00 | Window Closed / Lapsed |