US3637521A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Demulsification of sulfonated oil emulsions
Assignee: WR Grace and Co
•
Filing: 1969-06-26
•
Granted: 1972-01-25
•
Expires: 1989-06-26
Abstract
Abstract Sulfonated oil emulsions are readily demulsified by contact with an alkyl amine and an acid. Such emulsions comprise cutting oils, and sulfonated petroleum fractions. The alkyl amines contain from one to five amine groups and from two to 12 carbon atoms.
Inventors
- 👤 Andrew G Tsuk
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 01:14
CPC Classifications
C; C10; C10M; C10M3/00; B; B01; B01D; B01D17/00; B01D17/02; B01D17/04; B01D17/047; C10M2201/00; C10M2201/02; C10M2201/08; C10M2201/081; C10M2201/082; C10M2201/084; C10M2215/00; C10M2215/02; C10M2215/04; C10M2215/24; C10M2215/26; C10M2217/00; C10M2217/04; C10M2217/046; C10M2217/06; C10M2219/00; C10M2219/04; C10M2219/044; C10N; C10N2040/00; C10N2040/20; C10N2040/22
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
23 words
The method of claim 1 wherein said acidifying is with an acid selected from the group consisting of sulfuric acid and hydrochloric acid.
Claim 2
Dependent Claim
11 words
The method of claim 2 wherein said acid is hydrochloric acid.
Claim 3
Dependent Claim
23 words
The method of claim 1 wherein said alkyl amine is selected from the group consisting of ethylenediamine and diethylenetriamine and triethylenetetramine and tetraethylenepentamine.
Claim 4
Dependent Claim
17 words
The method of claim 1 wherein said oil phase is removed from said water phase by decantation.
Claim 5
Dependent Claim
35 words
The method of claim 1 wherein said alkyl amine is added in an amount so that the mole equivalent of amine nitrogen is about 0.8 to about 2 times the mole equivalent of sulfonate sulfur.
Claim 6
Dependent Claim
20 words
The method of claim 1 wherein said emulsion is acidified to a pH of from about 3.5 to about 5.5.
Claim 7
Dependent Claim
15 words
The method of claim 8 wherein said pH is from about 3.8 to about 4.5.
Claim 8
Dependent Claim
63 words
The method of claim 1 comprising a. acidifying a sulfonated emulsion with 1 N hydrochloric acid to give pH of about 3.8 to about 4.5, b. admixing said acidified emulsion with an alkylamine selected from the group consisting of ethylenediamine and diethylenetriamine and triethylenetetramine to form an oil phase and a water phase, and c. removing said oil phase from said water phase.
Claim 9
Dependent Claim
34 words
The method of claim 9 wherein said alkylamine is added in an amount so that the mole equivalent of amine nitrogen is about 0.8 to about 2 times the mole equivalent of sulfonate sulfur.
Claim 10
Independent Claim
63 words
The method of demulsifying sulfonated oil emulsions having a sulfonated oil concentration of from about 0.1 to 50 percent by volume comprising: a. admixing said sulfonated oil emulsion with an alkyl amine to form a mixture, b. acidifying said mixture with a mineral acid, to form an oil phase and a water phase, and, c. removing said oil phase from said water phase.
Claim 11
Dependent Claim
23 words
The method of claim 11 wherein said acidifying is with an acid selected from the group consisting of sulfuric acid and hydrochloric acid.
Claim 12
Dependent Claim
11 words
The method of claim 11 wherein said acid is hydrochloric acid.
Claim 13
Dependent Claim
23 words
The method of claim 11 wherein said alkyl amine is selected from the group consisting of ethylenediamine and diethylenetriamine and triethylenetetramine and tetraethylenepentamine.
References Cited (Backward Citations)
US3235501A
Cited
US3313736A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-01-24 | 1975-07-26 | 1976-01-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-01-24 | 1979-07-26 | 1980-01-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-01-24 | 1983-07-26 | 1984-01-25 | $7700.00 | Window Closed / Lapsed |