US3840352A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method and composition for treating high pour point oils under low ambient temperature conditions
Assignee: Union Oil Company of California
•
Filing: 1972-05-30
•
Granted: 1974-10-08
•
Expires: 1992-05-30
Abstract
Abstract A low pour point additive composition comprising an admixture of about 1 to 20 weight percent of a copolymer of ethylene and a monoethylenically unsaturated ester, about 5 to 25 weight percent liquid monohydroxy phenols, and at least about 55 weight percent of a hydrocarbon solvent containing a substantial proportion of cyclic hydrocarbon compounds. A method for treating high pour point, wax-containing oil to inhibit the deposition of wax from the oil and to facilitate storage and pipeline transportation of the oil at ambient temperatures below the normal pour point of the wax-containing oil wherein the additive composition is admixed into the wax-containing oil to provide therein an effective concentration of the copolymer between about 5 to 10,000 ppm.
Inventors
- 👤 J Scheffel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 12:02
CPC Classifications
C; C10; C10L; C10L1/00; C10L1/10; C10L1/14; C10L1/143; C10L1/16; C10L1/1608; C10L1/1616; C10L1/18; C10L1/192; C10L1/195; C10L1/196; C10L1/1963; C10L1/197; C10L1/1973
Claims Analysis
Total Claims: 26
Claim 1
Independent Claim
35 words
AN ADDITIVE COMPOSITION FOR USE IN TREATING WAX CONTAINING OILS, WHICH COMPRISES AN ADMIXTURE OF ABOUT 1 TO 20 WEIGHT PERCENT OF A COPOLYMER OF ETHYLENE AND A MONOETHYLENICALLY UNSATURATED ESTER CHARACTERIZED BY THE FORMULA:
Claim 2
Dependent Claim
35 words
AN ADDITIVE COMPOSITION FOR USE IN TREATING WAX CONTAINING OILS, WHICH COMPRISES AN ADMIXTURE OF ABOUT 1 TO 20 WEIGHT PERCENT OF A COPOLYMER OF ETHYLENE AND A MONOETHYLENICALLY UNSATURATED ESTER CHARACTERIZED BY THE FORMULA:
Claim 3
Dependent Claim
20 words
The composition defined in claim 1 wherein said copolymer is copolymer ethylene/vinyl acetate, copolymer ethylene/ethyl acrylate or copolymer ethylene/methyl methacrylate.
Claim 4
Dependent Claim
41 words
The composition defined in claim 1 wherein said copolymer is a copolymer of ethylene and vinyl acetate containing from about 10 to 70 weight percent vinyl acetate and exhibiting a melt index between about 1 and 600 grams per 10 minutes.
Claim 5
Dependent Claim
40 words
The composition defined in claim 1 wherein said copolymer is a copolymer of ethylene and vinyl acetate containing about 35 to 55 weight percent vinyl acetate and exhibiting a melt index between about 1 and 600 grams per 10 minutes.
Claim 6
Dependent Claim
41 words
The composition defined in claim 1 wherein said monohydroxy phenols comprise a mixture of monohydroxy phenols selected from the group consisting of phenol and alkyl and polyalkyl phenols in which each Alkyl group contains from about 1 to 12 carbon atoms.
Claim 7
Dependent Claim
117 words
An additive composition for use in treating wax-containing oils, which comprises an admixture of (1) about 1 to 20 weight percent of a copolymer of ethylene and vinyl acetate containing from about 10 to 70 weight percent vinyl acetate and exhibiting a melt index between about 1 and 600 grams per 10 minutes, (2) about 5 to 25 weight percent of a mixture of monohydroxy phenols having molecular weights below about 300 selected from the group consisting of phenol and alkyl and polyalkyl phenols in which each alkyl group contains from about 1 to 12 carbon atoms, and (3) at least about 55 weight percent of liquid hydrocarbon solvent containing a substantial proportion of cyclic hydrocarbon compounds.
Claim 8
Dependent Claim
117 words
An additive composition for use in treating wax-containing oils, which comprises an admixture of (1) about 1 to 20 weight percent of a copolymer of ethylene and vinyl acetate containing from about 10 to 70 weight percent vinyl acetate and exhibiting a melt index between about 1 and 600 grams per 10 minutes, (2) about 5 to 25 weight percent of a mixture of monohydroxy phenols having molecular weights below about 300 selected from the group consisting of phenol and alkyl and polyalkyl phenols in which each alkyl group contains from about 1 to 12 carbon atoms, and (3) at least about 55 weight percent of liquid hydrocarbon solvent containing a substantial proportion of cyclic hydrocarbon compounds.
Claim 9
Dependent Claim
24 words
The composition defined in claim 6 wherein said copolymer of ethylene and vinyl acetate contains from about 35 to 55 weight percent vinyl acetate.
Claim 10
Dependent Claim
34 words
The composition defined in claim 6 wherein said liquid hydrocarbon is selected from the group consisting of benzene, toluene, xylene, hydrocarbon mixtures containing at least about 50 weight percent cyclic hydrocarbon compounds, and dipentene.
Claim 11
Dependent Claim
23 words
The composition defined in claim 8 wherein said liquid hydrocarbon solvent boils within the range of about 100* F. to about 700* F.
Claim 12
Independent Claim
56 words
A method for inhibiting the deposition of wax from wax-containing oils and for depressing the pour point and yield stress of high pour point, wax-containing oils which comprises admixing into said oil a liquid admixture of about 1 to 20 weight percent of a copolymer of ethylene and a monoethylenically unsaturated ester characterized by the formula:
Claim 13
Independent Claim
56 words
A method for inhibiting the deposition of wax from wax-containing oils and for depressing the pour point and yield stress of high pour point, wax-containing oils which comprises admixing into said oil a liquid admixture of about 1 to 20 weight percent of a copolymer of ethylene and a monoethylenically unsaturated ester characterized by the formula:
Claim 14
Dependent Claim
20 words
The method defined in claim 10 wherein said copolymer is copolymer ethylene/vinyl acetate, copolymer ethylene/ethyl acrylate or copolymer ethylene/methyl methacrylate.
Claim 15
Dependent Claim
46 words
The method defined in claim 10 wherein said admixture is incorporated into said wax-containing oil at an oil temperature sufficiently high to maintain the wax dissolved in the oil, and wherein said oil is thereafter cooled to a temperature below the solidification temperature of the wax.
Claim 16
Dependent Claim
33 words
The method defined in claim 10 wherein said admixture is incorporated into said wax-containing oil in an amount to provide therein an effective concentration of said copolymer between about 5 and 10,000 ppm.
Claim 17
Dependent Claim
41 words
The method defined in claim 10 wherein said copolymer is a copolymer of ethylene and vinyl acetate containing from about 10 to 70 weight percent vinyl acetate and exhibiting a melt index between about 1 and 600 grams per 10 minutes.
Claim 18
Dependent Claim
40 words
The method defined in claim 10 wherein said copolymer is a copolymer of ethylene and vinyl acetate containing about 35 to 55 weight percent vinyl acetate and exhibiting a melt index between about 1 and 600 grams per 10 minutes.
Claim 19
Dependent Claim
41 words
The method defined in claim 10 wherein said monohydroxy phenols comprise a mixture of monohydroxy phenols selected from the group consisting of phenol and alkyl and polyalkyl phenols in which each alkyl group contains from about 1 to 12 carbon atoms.
Claim 20
Independent Claim
175 words
A method for inhibiting the deposition of wax from wax-containing oils and for depressiNg the pour point and yield stress of high pour point, wax-containing oils which comprises admixing into said oil a liquid admixture of (1) about 1 to 20 weight percent of a copolymer of ethylene and vinyl acetate containing from about 10 to 70 weight percent vinyl acetate and exhibiting a melt index between about 1 and 600 grams per 10 minutes, (2) about 5 to 25 weight percent of a mixture of monohydroxy phenols having molecular weights below about 300 selected from the group consisting of phenol and alkyl and polyalkyl phenols in which each alkyl group contains from about 1 to 12 carbon atoms, and (3) at least about 55 weight percent of liquid hydrocarbon solvent containing a substantial proportion of cyclic hydrocarbon compounds said liquid admixture having a pour point below about 25* F. and being added to said wax-containing oil in an amount to provide therein a concentration of between about 5 and 10,000 ppm of said copolymer.
Claim 21
Independent Claim
175 words
A method for inhibiting the deposition of wax from wax-containing oils and for depressiNg the pour point and yield stress of high pour point, wax-containing oils which comprises admixing into said oil a liquid admixture of (1) about 1 to 20 weight percent of a copolymer of ethylene and vinyl acetate containing from about 10 to 70 weight percent vinyl acetate and exhibiting a melt index between about 1 and 600 grams per 10 minutes, (2) about 5 to 25 weight percent of a mixture of monohydroxy phenols having molecular weights below about 300 selected from the group consisting of phenol and alkyl and polyalkyl phenols in which each alkyl group contains from about 1 to 12 carbon atoms, and (3) at least about 55 weight percent of liquid hydrocarbon solvent containing a substantial proportion of cyclic hydrocarbon compounds said liquid admixture having a pour point below about 25* F. and being added to said wax-containing oil in an amount to provide therein a concentration of between about 5 and 10,000 ppm of said copolymer.
Claim 22
Dependent Claim
24 words
The method defined in claim 17 wherein said copolymer of ethylene and vinyl acetate contains from about 35 to 55 weight percent vinyl acetate.
Claim 23
Dependent Claim
34 words
The method defined in claim 17 wherein said liquid hydrocarbon is selected from the group consisting of benzene, toluene, xylene, hydrocarbon mixtures containing at least about 50 weight percent cyclic hydrocarbon compounds, and dipentene.
Claim 24
Dependent Claim
23 words
The method defined in claim 17 wherein said liquid hydrocarbon solvent boils within the range of about 100* F. to about 700* F.
Claim 25
Dependent Claim
29 words
The method defined in claim 17 wherein an amount of said admixture is incorporated into said wax-containing oil effective to inhibit the deposition of wax from said wax-containing oil.
Claim 26
Dependent Claim
30 words
The method defined in claim 17 wherein an amount of said admixture is incorporated into said wax-containing oil effective to reduce the pour point and yield stress of said oil.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-10-07 | 1978-04-08 | 1978-10-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-10-07 | 1982-04-08 | 1982-10-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-10-07 | 1986-04-08 | 1986-10-08 | $7700.00 | Window Closed / Lapsed |