US4708720A
Expired / Lapsed
US
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Protection of hydrocarbons against the action of microorganisms
Assignee: Elf Antar France
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Filing: 1986-02-13
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Granted: 1987-11-24
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Expires: 2006-02-13
Abstract
Abstract Process for inhibition of microorganisms in liquid hydrocarbons by the introduction of one or more biocidal agents into these hydrocarbons, which also include a small quantity of water and a surface-active compound. This treatment is particularly useful for preserving liquid hydrocarbons such as petrol, kerosene, gasoline or domestic fuel while being stored.
Inventors
- 👤 Henri Grangette
- 👤 Michel Llinares
- 👤 Bernard Bossand
- 👤 Alain Faure
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 15:45
CPC Classifications
C; C10; C10L; C10L1/00; C10L1/10
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
59 words
Process for the inhibition of microorganisms in a petroleum distillate which comprises introducing into said distillate, a biocidal effective amount of a microemulsion comprising petroleum distillate, 0.1-5% biocide for said microorganism, 0.2-6% water, 1-12% surfactant and 0.2-3% solvent for said surfactant, wherein the surfactant is a petroleum or alkyl benzene sulphonate, or a polyoxyalkylated alcohol or phenol, or sulfosuccinate.
Claim 2
Dependent Claim
59 words
Process for the inhibition of microorganisms in a petroleum distillate which comprises introducing into said distillate, a biocidal effective amount of a microemulsion comprising petroleum distillate, 0.1-5% biocide for said microorganism, 0.2-6% water, 1-12% surfactant and 0.2-3% solvent for said surfactant, wherein the surfactant is a petroleum or alkyl benzene sulphonate, or a polyoxyalkylated alcohol or phenol, or sulfosuccinate.
Claim 3
Dependent Claim
19 words
Process according to claim 1 wherein the solvent for the surfactant compound is an alcohol, ether, ester or ketone.
Claim 4
Dependent Claim
22 words
Process according to claim 2 wherein said solvent is isoamyl alcohol, butanol, monobutylether of ethylene glycol or isopropyl ether of ethylene glycol.
Claim 5
Dependent Claim
28 words
Process according to claim 1 wherein the weight of the surfactant is about double that of the water and about 4 to 5 times that of the solvent.
Claim 6
Dependent Claim
66 words
Process according to claim 4 wherein said biocide comprises ethylene glycol bis-semiformal or 2-methyl-4-isothiazoline-3-one in an amount of 0.44-2.2%; said surfactant comprises sodium alkyl benzene sulfonate, sodium petroleum sulfonate, ethoxylated C 13-15 alcohol or ethoxylated nonyl phenol in an amount of 2.25-7.84%; said solvent comprises monobutylether of ethylene glycol, isoamyl alcohol, butanol or isopropyl ether of ethylene glycol, in an amount of 0.75-3.36%; and 0.56-2.8% water.
Claim 7
Dependent Claim
39 words
Process according to claim 1 wherein said surfactant is a petroleum sulfonate of equivalent average weight of 420 to 520, alkylbenzene sulfonate of average molecular weight of 405 to 520, oxyethylated alcohol, oxyethylated octyl phenol or oxyethylated nonyl phenol.
Claim 8
Dependent Claim
26 words
Process according to claim 1 wherein said biocide is a formaldehyde liberating hemi-acetal, isothiazoline, triazine, oxazolidine, glutaaldehyde or a salt or a chelate of thiohydroxamic acid.
Claim 9
Dependent Claim
50 words
Composition for the inhibition of microorganisms in a petroleum distillate comprising a microemulsion of petroleum distillate, 0.1-5% biocide for said microorganism, 0.2-6% water, 1-12% surfactant and 0.2-3% of solvent for said surfactant, wherein the surfactant is a petroleum or alkyl benzene sulphonate, or a polyoxyalkylated alcohol or phenol, or sulfosuccinate.
Claim 10
Dependent Claim
50 words
Composition for the inhibition of microorganisms in a petroleum distillate comprising a microemulsion of petroleum distillate, 0.1-5% biocide for said microorganism, 0.2-6% water, 1-12% surfactant and 0.2-3% of solvent for said surfactant, wherein the surfactant is a petroleum or alkyl benzene sulphonate, or a polyoxyalkylated alcohol or phenol, or sulfosuccinate.
Claim 11
Dependent Claim
26 words
Composition according to claim 8 wherein the weight of surfactant is about double that of the water and about 4 to 5 times of said solvent.
Claim 12
Dependent Claim
15 words
Composition according to claim 9 wherein said solvent is an alcohol, ether, ester or ketone.
Claim 13
Dependent Claim
39 words
Composition according to claim 9 wherein said surfactant is a petroleum sulfonate of equivalent average weight of 420 to 520, alkylbenzene sulfonate of average molecular weight of 405 to 520, oxyethylated alcohol, oxyethylated octyl phenol or oxyethylated nonyl phenol.
Claim 14
Dependent Claim
22 words
Composition according to claim 11 wherein said solvent is isoamyl alcohol, butanol, monobutylether of ethylene glycol or isopropyl ether of ethylene glycol.
Claim 15
Dependent Claim
26 words
Composition according to claim 12 wherein said biocide is a formaldehyde liberating hemi-acetal, isothiazoline, triazine, oxazolidine, glutaaldehyde or a salt or a chelate of thiohydroxamic acid.
Claim 16
Dependent Claim
68 words
Composition according to claim 9 wherein wherein said biocide comprises ethylene glycol bis-semiformal or 2-methyl-4-isotiazoline-3-one in an amount of 0.44-2.2%; said surfactant comprises sodium alkyl benzene sulfonate, sodium petroleum sulfonate, ethoxylated C 13-15 alcohol or ethoxylated nonyl phenol in an amount of 2.25-7.84%; said solvent comprises sodium monobutylether of ethylene glycol, isoamyl alcohol, butanol or isopropyl ether of ethylene glycol, in an amount of 0.75-3.36%; and 0.56-2.8% water.
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) | 1990-11-23 | 1991-05-25 | 1991-11-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-11-23 | 1995-05-25 | 1995-11-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-11-23 | 1999-05-25 | 1999-11-24 | $7700.00 | Window Closed / Lapsed |