US4462910A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Oil slick dispersants using diguanidinium salt
Assignee: Labofina SA
•
Filing: 1983-02-03
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Granted: 1984-07-31
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Expires: 2003-02-03
Abstract
Abstract A process for disposing of oil slicks on seawater comprises treating the polluted seawater with a liquid dispersing composition and a nitrogen-containing nutrient for the seawater micro-organisms which are active in oil metabolization. The nutrient is a diguanidinium salt having the general formula: XH.H.sub.2 N--C(═NH)--NH--R--NH--C(═NH)--NH.sub.2 HX wherein R is preferably an alkyl radical containing from 2 to 12 carbon atoms and X is a halogen or an acid anion.
Inventors
- 👤 Andre Lepain
- 👤 Robert D. E. M. Bronchart
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 12:25
CPC Classifications
C; C02; C02F; C02F1/00; C02F1/68; C02F1/682; C02F3/00; C02F3/34; C02F3/344; Y; Y10; Y10S; Y10S210/00; Y10S210/918; Y10S210/922; Y10S516/00; Y10S516/01; Y10S516/07
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
65 words
A process for reducing oil slicks on seawater comprising treating oil-polluted seawater with a liquid dispersing composition and a nitrogen-containing nutrient for seawater micro-organisms which are active in oil metabolization, said nutrient being a diguanidinium salt having the general formula ##STR3## wherein R is an alkyl radical containing from about 2 to about 12 carbon atoms and X is a halogen or an acid anion.
Claim 2
Dependent Claim
65 words
A process for reducing oil slicks on seawater comprising treating oil-polluted seawater with a liquid dispersing composition and a nitrogen-containing nutrient for seawater micro-organisms which are active in oil metabolization, said nutrient being a diguanidinium salt having the general formula ##STR3## wherein R is an alkyl radical containing from about 2 to about 12 carbon atoms and X is a halogen or an acid anion.
Claim 3
Dependent Claim
19 words
The process of claim 1, wherein R is an alkyl radical containing from 2 to about 8 carbon atoms.
Claim 4
Dependent Claim
14 words
The process of claim 2, wherein R contains from 2 to 6 carbon atoms.
Claim 5
Dependent Claim
34 words
The process of claim 1, wherein X is selected from the group consisting of chlorine and the anions of nitric acid, sulphuric acid, methylsulphuric acid, ethylsulphuric acid, alkylbenzenesulphonic acid, acetic acid, and lactic acid.
Claim 6
Dependent Claim
38 words
The process of claim 1 comprising treating the polluted seawater with a liquid dispersing composition containing at least one surface-active compound, at least one solvent and at least one diguanidinium salt which is easily dispersed in said composition.
Claim 7
Dependent Claim
30 words
A liquid dispersing composition for reducing crude oil pollution in seawater, said composition containing at least one surface-active compound, at least one solvent for said compound, and a diguanidinium salt.
Claim 8
Dependent Claim
30 words
A liquid dispersing composition for reducing crude oil pollution in seawater, said composition containing at least one surface-active compound, at least one solvent for said compound, and a diguanidinium salt.
Claim 9
Dependent Claim
14 words
The composition of claim 6, containing up to 35% by weight of diguanidinium salt.
Claim 10
Dependent Claim
13 words
The composition of claim 7, containing from 2-20% by weight of diguanidinium salt.
Claim 11
Dependent Claim
13 words
The composition of claim 7, containing from 5-15% by weight of diguanidinium salt.
Claim 12
Dependent Claim
17 words
The composition of claim 6, further comprising a phosphorous compound for supplying a nutrient for seawater micro-organisms.
Claim 13
Dependent Claim
22 words
The composition of claim 10, comprising from about 30 to about 85 wt % of surface-active compound, diguanidinium salt and phosphorous compound.
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) | 1987-07-31 | 1988-01-30 | 1988-07-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-07-31 | 1992-01-30 | 1992-07-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-07-31 | 1996-01-30 | 1996-07-31 | $7700.00 | Window Closed / Lapsed |