Patent US4374735A successfully refreshed from Google Patents.
US4374735A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for removal of oil from sorbents using glycolipids
Assignee: GESELLSCHAFT fur BIOTECHNOLOGISCHE FORSCHUNG
•
Filing: 1980-06-11
•
Granted: 1983-02-22
•
Expires: 2000-06-11
Abstract
Abstract Oil polluted water or solid adsorbents are treated with microbially produced glycolipids to separate the oil phase. The treatment may be carried out in an apparatus which can be taken to the site and which comprises a mixing vessel supported by an undercarriage and provided with a storage container to supply the glycolipids, filling means, overflow discharge means and outlet means at its base.
Inventors
- 👤 Walter Lindorfer
- 👤 Walther Schulz
- 👤 Fritz Wagner
- 👤 Wilhelm Jahn-Held
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 23:07
CPC Classifications
B; B01; B01D; B01D17/00; B01D17/02; B01D17/04; B01D17/047; B09; B09C; B09C1/00; C; C02; C02F; C02F3/00; C02F3/34; C09; C09K; C09K3/00; C09K3/32; Y; Y10; Y10S; Y10S210/00; Y10S210/918; Y10S210/922; Y10S210/925
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
69 words
A process for separating oils or petroleum hydrocarbons from a sorbent material saturated with said oils or petroleum hydrocarbons which consists essentially of mixing said sorbent material with an aqueous solution or dispersion of microbially produced glycolipids to form a slurry and separating the oil-containing phase rising out of the aqueous phase, wherein said sorbent material is selected from the group consisting of hydrophobic, thermally expanded vermiculites and perlites.
Claim 2
Dependent Claim
69 words
A process for separating oils or petroleum hydrocarbons from a sorbent material saturated with said oils or petroleum hydrocarbons which consists essentially of mixing said sorbent material with an aqueous solution or dispersion of microbially produced glycolipids to form a slurry and separating the oil-containing phase rising out of the aqueous phase, wherein said sorbent material is selected from the group consisting of hydrophobic, thermally expanded vermiculites and perlites.
Claim 3
Dependent Claim
19 words
The process according to claim 1, wherein said glycolipids are mono-and diesters of α,α'-trehalose and long-chain α-alkyl-β-hydroxy fatty acids.
Claim 4
Dependent Claim
24 words
The process according to claim 1, wherein said aqueous solution or dispersion comprises the crude extract obtained in the microbial production of the glycolipids.
Claim 5
Dependent Claim
38 words
The process according to claim 1, wherein said glycolipids are produced using the microorganisms Nocardia rhodochrous species or Mycobacterium phlei from a mixture of alkanes with 12 to 19 carbon atoms in the molecule or from crude oil.
Claim 6
Dependent Claim
32 words
The process according to claim 1, wherein said glycolipids are used in the form of an aqueous solution or dispersion containing said glycolipids in a concentration of from 0.01 to 5.0 g/l.
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) | 1986-02-21 | 1986-08-23 | 1987-02-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-02-21 | 1990-08-23 | 1991-02-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-02-21 | 1994-08-23 | 1995-02-22 | $7700.00 | Window Closed / Lapsed |