US4033784A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for dissolving asphaltic material
Assignee: Halliburton Co
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Filing: 1975-08-25
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Granted: 1977-07-05
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Expires: 1995-08-25
Abstract
Abstract Asphaltic material is dissolved by contact with a solvent composition for a time sufficient to dissolve the asphaltic material wherein the solvent composition is comprised of a liquid heavy aromatic solvent having a high flash point and a fused heterocyclic ring compound or compounds soluble in the heavy aromatic solvent. In another embodiment, the asphaltic material is the binder material of a degraded organic residue whereby dissolution of the asphaltic material enables the convenient disintegration of the degraded organic residue. In still another embodiment, the solvent composition is the oil phase of an oil-water emulsion.
Inventors
- 👤 Michael B. Lawson
- 👤 Kenneth J. Snyder
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 17:09
CPC Classifications
B; B08; B08B; B08B3/00; B08B3/04; B08B3/08; C; C10; C10G; C10G1/00; C10G1/04; C10G21/00; C10G21/06; C10G21/12; C11; C11D; C11D7/00; C11D7/50; C11D7/5004; C11D7/5013; C23; C23G; C23G5/00; C23G5/02; C23G5/024; C11D7/22; C11D7/24; C11D7/32
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
126 words
A method for dissolving asphaltic material comprising: establishing contact between said asphaltic material and a composition comprising a liquid aromatic solvent and an additive material soluble in said liquid aromatic solvent, and maintaining said contact for a time sufficient to dissolve said asphaltic material; wherein said liquid aromatic solvent has a flash point of at least about 160° F. and is a mixture of aromatic compounds selected from alkyl substituted benzene compounds having 1 to 10 carbon atoms per alkyl substituent, naphthalene, and alkyl substituted naphthalene having 1 to 10 carbon atoms per alkyl substituent; and wherein said additive material is benzotriazole and is present in said composition in the range of from about 0.1 to about 50 percent by weight of said liquid aromatic solvent.
Claim 2
Independent Claim
126 words
A method for dissolving asphaltic material comprising: establishing contact between said asphaltic material and a composition comprising a liquid aromatic solvent and an additive material soluble in said liquid aromatic solvent, and maintaining said contact for a time sufficient to dissolve said asphaltic material; wherein said liquid aromatic solvent has a flash point of at least about 160° F. and is a mixture of aromatic compounds selected from alkyl substituted benzene compounds having 1 to 10 carbon atoms per alkyl substituent, naphthalene, and alkyl substituted naphthalene having 1 to 10 carbon atoms per alkyl substituent; and wherein said additive material is benzotriazole and is present in said composition in the range of from about 0.1 to about 50 percent by weight of said liquid aromatic solvent.
Claim 3
Dependent Claim
38 words
The method of claim 1 wherein said contact between said asphaltic material and said composition is conducted at a temperature in the range of from about 75° F. to about the flash point of said liquid aromatic solvent.
Claim 4
Dependent Claim
27 words
The method of claim 2 wherein the flash point of said liquid aromatic solvent is in the range of from about 160° F. to about 350° F.
Claim 5
Dependent Claim
27 words
The method of claim 3 wherein the flash point of said liquid aromatic solvent is in the range of from about 180° F. to about 250° F.
Claim 6
Dependent Claim
32 words
The method of claim 4 wherein said additive material is present in said composition in the range of from about 0.3 to about 30 percent by weight of said liquid aromatic solvent.
Claim 7
Dependent Claim
42 words
The method of claim 3 wherein said composition is the oil phase of an oil and water emulsion and said asphaltic material is the binder material of a carbonaceous scale and further wherein said carbonaceous scale is adhering to a metallic substrate.
Claim 8
Dependent Claim
27 words
The method of claim 6 wherein said oil phase is present in the range of from about 2 to about 60 percent by volume of said emulsion.
Claim 9
Dependent Claim
32 words
The method of claim 4 wherein said liquid aromatic solvent is a mixture of aromatic compounds selected from the group consisting of ethylbenzene, amylbenzene, 2-phenylbutane, t-butylbenzene, 1,2-diethylbenzene,1,3-diethylbenzene, 1,4-diethylbenzene, 1-methylnaphthalene, 1-ethylnaphthalene, and 2-ethylnaphthalene,1,4-dimethylnaphthalene.
Claim 10
Dependent Claim
49 words
The method of claim 5 wherein said additive material is benzotriazole, said liquid aromatic solvent has a flash point of about 200° F. and said benzotriazole is present in said composition in the range of from about 0.5 to about 3 percent by weight of said liquid aromatic solvent.
Claim 11
Dependent Claim
31 words
The method of claim 9 wherein said liquid aromatic solvent is a mixture of aromatic compounds selected from the group consisting of ethylbenzene, amylbenzene, 2-phenylbutane, t-butylbenzene,1,2-diethylbenzene,1,3-diethylbenzene, 1,4-diethyl-benzene, 1-methylnaphthalene, 1-ethylnaphthalene, and 2-ethylnaphthalene,1,4-dimethylnaphthalene.
Claim 12
Dependent Claim
42 words
The method of claim 10 wherein said composition is the oil phase of an oil and water emulsion and said asphaltic material is the binder material of a carbonaceous scale and further wherein said carbonaceous scale is adhering to a metallic substrate.
Claim 13
Dependent Claim
27 words
The method of claim 11 wherein said oil phase is present in the range of from about 30 to about 40 percent by volume of said emulsion.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1980-07-04 | 1981-01-03 | 1981-07-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-07-04 | 1985-01-03 | 1985-07-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-07-04 | 1989-01-03 | 1989-07-05 | $7700.00 | Window Closed / Lapsed |