Patent US5019341A successfully refreshed from Google Patents.
US5019341A
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US
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Method of inhibiting corrosion of metal surfaces in contact with a corrosive hydrocarbon containing medium
Assignee: Veolia WTS USA Inc
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Filing: 1986-08-11
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Granted: 1991-05-28
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Expires: 2006-08-11
Abstract
Abstract Hydrocarbon soluble polyamidoamines prepared from tallowtriamine and/or tallowtetramine--(methyl)acrylate reactants are effective corrosion inhibitors for metal surfaces in contact with corrosive hydrocarbon mediums even under alkaline conditions.
Inventors
- 👤 Joseph H. Y. Niu
- 👤 James G. Edmondson
- 👤 Scott E. Lehrer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 01:59
CPC Classifications
C; C10; C10L; C10L1/00; C10L1/10; C10L1/14; C10L1/22; C10L1/222; C10L1/224; C09; C09K; C09K8/00; C09K8/54; C10G; C10G9/00; C10G9/14; C10G9/16; C10L1/234; C10L1/236; C10L1/2364; C10L10/00; C10L10/04
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
68 words
A method of inhibiting corrosion of metal surfaces in contact with a corrosive hydrocarbon-containing medium comprising contacting said metal surfaces with a hydrocarbon soluble polymerization reaction product of a) a component consisting essentially of tallowtriamine or tallowtetramine or mixtures thereof and b) an acrylic acid type compound having the structure, ##STR2## wherein R is hydrogen or methyl, and R' is methyl, ethyl, propyl, isopropyl, butyl, amyl, or hexyl.
Claim 2
Independent Claim
68 words
A method of inhibiting corrosion of metal surfaces in contact with a corrosive hydrocarbon-containing medium comprising contacting said metal surfaces with a hydrocarbon soluble polymerization reaction product of a) a component consisting essentially of tallowtriamine or tallowtetramine or mixtures thereof and b) an acrylic acid type compound having the structure, ##STR2## wherein R is hydrogen or methyl, and R' is methyl, ethyl, propyl, isopropyl, butyl, amyl, or hexyl.
Claim 3
Dependent Claim
31 words
A method as recited in claim 1 wherein said reaction product is added to said medium in an amount of from about 0.5-500 parts, based upon one million parts of hydrocarbon.
Claim 4
Dependent Claim
29 words
A method as recited in claim 2 wherein said reaction product is added to said medium in an amount of from about 0.5-50 parts per million parts of hydrocarbon.
Claim 5
Dependent Claim
49 words
A method as recited in claim 1 wherein said polymerization reaction product is also formed from an additional component (c), wherein (c) is a member selected from the group consisting of alkylene polyamines having from about 3 to about 10 amino groups and from about 2-6 carbon alkylene groups.
Claim 6
Dependent Claim
13 words
A method as recited in claim 4 wherein said component (c) comprises triethylenetetramine.
Claim 7
Dependent Claim
11 words
A method as recited in claim 1 wherein (b) comprises methylacrylate.
Claim 8
Dependent Claim
17 words
A method as recited in claim 1 wherein the molar ratio of a:b is from about 1-2:2-1.
Claim 9
Dependent Claim
23 words
A method as recited in claim 1 wherein said corrosive hydrocarbon containing medium is heated to temperatures of between about 100° F.-1000° F.
Claim 10
Dependent Claim
22 words
A method as recited in claim 1 wherein said corrosive hydrocarbon containing medium is heated to temperatures between about 600° F.-1000° F.
Claim 11
Dependent Claim
14 words
A method as recited in claim 1 wherein said metal surfaces comprise mild steel.
Claim 12
Dependent Claim
14 words
A method as recited in claim 1 wherein said metal surfaces comprise admiralty brass.
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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) | 1994-05-27 | 1994-11-26 | 1995-05-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1998-05-27 | 1998-11-26 | 1999-05-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2002-05-27 | 2002-11-26 | 2003-05-28 | $7700.00 | Window Closed / Lapsed |