US4229284A
Expired / Lapsed
US
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Corrosion control method using methoxypropylamine (mopa) in water-free petroleum and petrochemical process units
Assignee: Nalco Exxon Energy Chemicals LP
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Filing: 1978-05-15
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Granted: 1980-10-21
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Expires: 1998-05-15
Abstract
Abstract A method of inhibiting corrosion in separation units of water-free petroleum and petrochemical hydrocarbon processing systems which comprises adding a compound corresponding to Formula I below either alone or in combination with a film-forming amine corrosion inhibitor to the hydrocarbon being processed: Formula I R--O--(CH.sub.2)nNH.sub.2, wherein n is 2 or 3 and R is a lower alkyl radical of not more than 4 carbon atoms.
Inventors
- 👤 James A. White
- 👤 Thomas C. Maynard
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 16:10
CPC Classifications
B; B01; B01D; B01D3/00; B01D3/34; C; C10; C10G; C10G7/00; C10G7/10
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
62 words
A process for controlling corrosion in water-free petroleum and petrochemical hydrocarbon processing system separation units consisting essentially of adding a corrosion inhibiting amount of a composition having the formula R--O--(CH 2 )nNH 2 wherein n is 2 or 3 and R is a lower aklyl radical of not more than 4 carbon atoms to the hydrocarbon being processed in the separation unit.
Claim 2
Dependent Claim
62 words
A process for controlling corrosion in water-free petroleum and petrochemical hydrocarbon processing system separation units consisting essentially of adding a corrosion inhibiting amount of a composition having the formula R--O--(CH 2 )nNH 2 wherein n is 2 or 3 and R is a lower aklyl radical of not more than 4 carbon atoms to the hydrocarbon being processed in the separation unit.
Claim 3
Dependent Claim
19 words
The method of claim 1 wherein the compound is chosen from the group consisting of methoxypropylamine, methoxyethylamine and ethoxypropylamine.
Claim 4
Dependent Claim
10 words
The process of claim 1 wherein the compound is methoxypropylamine.
Claim 5
Dependent Claim
26 words
The process of claim 1 wherein the compound is added to the hydrocarbon before said hydrocarbon is passed through the distillation column of the separation unit.
Claim 6
Dependent Claim
18 words
The process of claim 1 wherein the compound is added to the overhead line of the separation unit.
Claim 7
Dependent Claim
28 words
The process of claim 1 wherein the amount of the compound added to the hydrocarbon is sufficient to raise the pH of the initial condensate to above 4.0.
Claim 8
Dependent Claim
76 words
A process for controlling corrosion in water-free petroleum and petrochemical hydrocarbon processing system separation units consisting essentially of adding to the hydrocarbon a corrosion inhibiting amount of a film-forming amine along with a composition having the formula R--O--(CH 2 )nNH 2 wherein n is 2 or 3 and R is a lower alkyl radical of not more than 4 carbon atoms in an amount sufficient to raise the pH of the initial condensate to above 4.0.
Claim 9
Dependent Claim
76 words
A process for controlling corrosion in water-free petroleum and petrochemical hydrocarbon processing system separation units consisting essentially of adding to the hydrocarbon a corrosion inhibiting amount of a film-forming amine along with a composition having the formula R--O--(CH 2 )nNH 2 wherein n is 2 or 3 and R is a lower alkyl radical of not more than 4 carbon atoms in an amount sufficient to raise the pH of the initial condensate to above 4.0.
Claim 10
Dependent Claim
19 words
The method of claim 7 wherein the compound is chosen from the group consisting of methoxypropylamine, methoxyethylamine and ethoxypropylamine.
Claim 11
Dependent Claim
10 words
The method of claim 7 wherein the compound is methoxypropylamine.
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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) | 1983-10-21 | 1984-04-21 | 1984-10-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-10-21 | 1988-04-21 | 1988-10-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-10-21 | 1992-04-21 | 1992-10-21 | $7700.00 | Window Closed / Lapsed |