US4414035A
Expired / Lapsed
US
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Method for the removal of asphaltenic deposits
Assignee: Baker Hughes Holdings LLC
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Filing: 1979-05-21
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Granted: 1983-11-08
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Expires: 1999-05-21
Abstract
Abstract This invention relates to the removal of organic deposits containing asphaltenic compounds from surfaces with hydrocarbon-substituted arylsulfonic acids such as alkaryl sulfonic acids; a composition comprising a mixture of: (1) an aromatic hydrocarbon, and (2) a hydrocarbon-substituted-alkarylsulfonic acid such as an alkaryl sulfonic acid, for example an alkylbenzenesulfonic acid where the alkyl group has at least 5 carbon atoms, for example, from about 5 to 20 carbon atoms can be used for the removal of organic deposits containing asphaltenic compounds from surfaces.
Inventors
- 👤 Michael E. Newberry
- 👤 Kenneth M. Barker
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 17:14
CPC Classifications
B; B08; B08B; B08B3/00; B08B3/04; B08B3/08; C; C11; C11D; C11D1/00; C11D1/02; C11D1/12; C11D1/22; C11D3/00; C11D3/43
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
31 words
A process for removing organic deposits containing asphaltenic constituents from surfaces which comprises contacting said organic deposits with a solvent mixture containing (1) an aromatic solvent, and (2) a hydrocarbon-substituted-alkarylsulfonic acid.
Claim 2
Dependent Claim
31 words
A process for removing organic deposits containing asphaltenic constituents from surfaces which comprises contacting said organic deposits with a solvent mixture containing (1) an aromatic solvent, and (2) a hydrocarbon-substituted-alkarylsulfonic acid.
Claim 3
Dependent Claim
14 words
The process of claim 1 where the hydrocarbon-substituted-alkarylsulfonic acid is an alkylbenzene sulfonic acid.
Claim 4
Dependent Claim
23 words
The process of claim 2 where the sum of the carbons on the alkyl group(s) of said acid is at least 5 carbons.
Claim 5
Dependent Claim
25 words
The process of claim 3 where the sum of the carbons on the alkyl group(s) of said acid is from about 5 to 20 carbons.
Claim 6
Dependent Claim
47 words
The process of claim 4 where the alkylbenzenesulfonic acid is selected from the group consisting of hexyl benzenesulfonic acid, octyl benzenesulfonic acid, decyl benzenesulfonic acid, undecyl benzenesulfonic acid, dodecyl benzenesulfonic acid, tridecyl benzenesulfonic acid, tetradecyl benzenesulfonic acid, pentadecyl benzenesulfonic acid, hexadecyl benzenesulfonic acid and octadecyl benzenesulfonic acid.
Claim 7
Dependent Claim
21 words
The process of claim 5 where the alkylbenzenesulfonic acid present in the solvent is from about 2 to 50% by weight.
Claim 8
Dependent Claim
18 words
The process of claim 6 where the alkylbenzenesulfonic acid present in the solvent is about 25% by weight.
Claim 9
Dependent Claim
29 words
A process for removing organic deposits containing asphaltenic constituents from surfaces which comprises contacting said organic deposits with a hydrocarbon-substituted-alkarylsulfonic acid dissolved in petroleum oil rich in aromatic hydrocarbons.
Claim 10
Dependent Claim
29 words
A process for removing organic deposits containing asphaltenic constituents from surfaces which comprises contacting said organic deposits with a hydrocarbon-substituted-alkarylsulfonic acid dissolved in petroleum oil rich in aromatic hydrocarbons.
Claim 11
Dependent Claim
12 words
The process of claim 8 where the alkylsulfonic acid is alkylbenzenesulfonic acid.
Claim 12
Dependent Claim
23 words
The process of claim 9 where the sum of the carbons on the alkyl group(s) of said acid has at least 5 carbons.
Claim 13
Dependent Claim
19 words
The process of claim 10 where the alkyl group(s) of said acid has from about 5 to 20 carbons.
Claim 14
Dependent Claim
46 words
The process of claim 11 where the alkylbenzenesulfonic acid is selected from the group consisting of hexyl benzenesulfonic acid, octyl benzenesulfonic acid, decylbenzenesulfonic acid, undecyl benzenesulfonic acid, dodecyl benzenesulfonic acid, tridecyl benzenesulfonic acid, tetradecyl benzenesulfonic acid, pentadecyl benzenesulfonic acid, hexadecyl benzenesulfonic acid, and octadecyl benzenesulfonic acid.
Claim 15
Dependent Claim
24 words
The process of claim 7 where the alkylbenzenesulfonic acid is dodecyl benzenesulfonic acid and the aromatic solvent is benzene, xylene, toluene or mixtures thereof.
Claim 16
Dependent Claim
13 words
The process of claim 11 where the alkylbenzenesulfonic acid is dodecyl benzenesulfonic acid.
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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) | 1986-11-07 | 1987-05-09 | 1987-11-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-11-07 | 1991-05-09 | 1991-11-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-11-07 | 1995-05-09 | 1995-11-08 | $7700.00 | Window Closed / Lapsed |