US3907701A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Demulsifying crude oil emulsions
Assignee: BASF SE
•
Filing: 1973-06-05
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Granted: 1975-09-23
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Expires: 1993-06-05
Abstract
Abstract Rapid dehydration of crude oils containing salt water by addition of minor amounts of polyalkylene polyamines having at least fifty recurring ethylene imine or propylene imine units, the said polyalkylene polyamine being completely alkoxylated at the nitrogen atom with from 10 to 300 moles of ethylene oxide and/or propylene oxide. Using these compounds it is possible to effect dehydration, in an economical manner, of crude oils containing up to relatively large percentages of high molecular weight hydrocarbons.
Inventors
- 👤 Gert Liebold
- 👤 Knut Oppenlaender
- 👤 Egon Buettner
- 👤 Rolf Fikentscher
- 👤 Rudolf Mohr
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 21:12
CPC Classifications
C; C10; C10G; C10G33/00; C10G33/04; C08; C08G; C08G73/00; C08G73/02; C08G73/024
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
108 words
IN A PROCESS FOR RAPID DEHYDRATION OF A CRUDE OIL IN THE FORM OF A SALTWATER-IN-OIL EMULSION BY THE ADDITION OF A DEMULSIFYING COMPOUND BASED ON DERIVATIVES OF POLYALKYLENE OXIDES, THE IMPROVEMENT WHICH COMPRISES: ADDING TO SAID CRUDE OIL A MINOR AMOUNT OF A SOLUTION CONTAINING IN AN AQUEOUS OR ORGANIC PHASE, AS THE ESSENTIAL DEMULFIFYING COMPOUND, A POLYALKYLENE POLYAMINE HAVING AT LEAST 50 AND UP TO 3,000 RECURRING ETHYLENE IMINE OR PROPLENE IMINE UNITS, WHICH POLYALKYLENE POLYAMINE IS TOTALLY ALKOXYLATED AT THE NITROGEN ATOMS WITH FROM 10 TO 300 MOLES OF ETHYLENE OXIDE AND/OR PROPYLENE OXIDE: AND THEN SEPARATING THE SALT-CONTAINING AQUEOUS PHASE FROM THE CRUDE OIL.
Claim 2
Dependent Claim
108 words
IN A PROCESS FOR RAPID DEHYDRATION OF A CRUDE OIL IN THE FORM OF A SALTWATER-IN-OIL EMULSION BY THE ADDITION OF A DEMULSIFYING COMPOUND BASED ON DERIVATIVES OF POLYALKYLENE OXIDES, THE IMPROVEMENT WHICH COMPRISES: ADDING TO SAID CRUDE OIL A MINOR AMOUNT OF A SOLUTION CONTAINING IN AN AQUEOUS OR ORGANIC PHASE, AS THE ESSENTIAL DEMULFIFYING COMPOUND, A POLYALKYLENE POLYAMINE HAVING AT LEAST 50 AND UP TO 3,000 RECURRING ETHYLENE IMINE OR PROPLENE IMINE UNITS, WHICH POLYALKYLENE POLYAMINE IS TOTALLY ALKOXYLATED AT THE NITROGEN ATOMS WITH FROM 10 TO 300 MOLES OF ETHYLENE OXIDE AND/OR PROPYLENE OXIDE: AND THEN SEPARATING THE SALT-CONTAINING AQUEOUS PHASE FROM THE CRUDE OIL.
Claim 3
Dependent Claim
44 words
A process as claimed in claim 1, wherein the alkoxylated polyalkylene imine a. is reacted only with propylene oxide, b. is reacted first with propylene oxide and then with ethylene oxide, or c. is reacted first with ethylene oxide and then with propylene oxide.
Claim 4
Dependent Claim
40 words
A process as claimed in claim 2, wherein the ratio of propylene oxide to ethylene oxide in case (b) is up to 1:15 and the ratio of ethylene oxide to propylene oxide in case (c) is from 20:1 to 1:20.
Claim 5
Dependent Claim
25 words
A process as claimed in claim 1, wherein the alkoxylated polyalkylene imine is a compound produced by mixed alkoxylation with ethylene oxide and propylene oxide.
Claim 6
Dependent Claim
32 words
A process as claimed in claim 1, wherein the alkoxylation products are added to the crude oil in quantities ranging from 1 to 10,000 ppm and preferably from 10 to 1,000 ppm.
Claim 7
Dependent Claim
27 words
A process as claimed in claim 1, wherein the alkoxylation products are used in the form of 0.5 to 50% w/w solutions in water or organic solvents.
Claim 8
Dependent Claim
21 words
A process as claimed in claim 1, wherein there are about 50 to 2,000 recurring imine units in the polyalkylene polyamine.
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) | 1978-09-22 | 1979-03-24 | 1979-09-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-09-22 | 1983-03-24 | 1983-09-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-09-22 | 1987-03-24 | 1987-09-23 | $7700.00 | Window Closed / Lapsed |