US3819328A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Use of alkylene polyamines in distillation columns to control corrosion
Assignee: Baker Petrolite LLC
•
Filing: 1973-06-19
•
Granted: 1974-06-25
•
Expires: 1993-06-19
Abstract
Abstract Alkylene polyamines, such as ethylene diamine (EDA), are employed to control acid corrosion in distillation columns, such as occurs in petroleum distillation columns; preferably where the polyamine is employed in conjunction with a corrosion inhibitor, for example, a non-neutralizing corrosion inhibitor such as a film-forming corrosion inhibitor.
Inventors
- 👤 T Go
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 13:02
CPC Classifications
C; C10; C10G; C10G7/00; C10G7/10
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
12 words
The process of claim 1 where the alkylene polyamine is ethylene diamine.
Claim 2
Dependent Claim
17 words
The process of claim 1 where a film-forming corrosion inhibitor is also added to said petroleum system.
Claim 3
Dependent Claim
12 words
The process of claim 3 where the alkylene polyamine is ethylene diamine.
Claim 4
Dependent Claim
47 words
The process of claim 1 which comprises regulating the pH of said petroleum medium in said petroleum system to between about 5.5 to about 7 by adding said alkylene polyamine to said petroleum system, said petroleum system including a distillation unit through which said petroleum medium passes.
Claim 5
Dependent Claim
12 words
The process of claim 5 where the alkylene polyamine is ethylene diamine.
Claim 6
Dependent Claim
17 words
The process of claim 5 where a film-forming corrosion inhibitor is also added to said petroleum system.
Claim 7
Dependent Claim
12 words
The process of claim 7 where the alkylene polyamine is ethylene diamine.
Claim 8
Dependent Claim
45 words
The process of claim 5 wherein said petroleum system includes an overhead vapor-condensation means and where the pH of said petroleum medium in said petroleum system is regulated to between about 5.5 to about 7 by adding the alkylene polyamine to the overhead vapor-condensation means.
Claim 9
Dependent Claim
12 words
The process of claim 9 where the alkylene polyamine is ethylene diamine.
Claim 10
Dependent Claim
17 words
The process of claim 9 where a film-forming corrosion inhibitor is also added to said petroleum system.
Claim 11
Dependent Claim
12 words
The process of claim 11 where the alkylene polyamine is ethylene diamine.
References Cited (Backward Citations)
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Cited
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Cited
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Cited
US3458453A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-06-24 | 1977-12-24 | 1978-06-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-06-24 | 1981-12-24 | 1982-06-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-06-24 | 1985-12-24 | 1986-06-25 | $7700.00 | Window Closed / Lapsed |