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US4440666A
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Method of making corrosion inhibiting polyamine amides, the amides, and use therefor
Assignee: GO TING SIN L
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Filing: 1982-08-06
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Granted: 1984-04-03
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Expires: 2002-08-06
Abstract
Abstract A hydrocarbonaceous liquid stream is modified to contain a minor amount of the amide reaction product of a polyalkylene polyamine, a neo-acid having 5 to 20 carbon atoms, the neo-acid having three alkyl groups on the carbon atom which is in the alpha position relative to the carboxylic group, and an aliphatic fatty acid having 10 to 30 carbon atoms, whereby corrosion of iron and other metals contacted by said stream is significantly reduced. The amides of the invention have the structural formula: <IMAGE>
Inventors
- 👤 Richard F. Miller
- 👤 Tony S. Go
- 👤 George R. Wilson, III
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 17:55
CPC Classifications
C; C10; C10M; C10M133/00; C10M133/02; C10M133/16; C10M2215/00; C10M2215/02; C10M2215/04; C10M2215/08; C10M2215/082; C10M2215/24; C10M2215/26; C10M2215/28; C10M2217/00; C10M2217/04; C10M2217/046; C10M2217/06; C10N; C10N2030/00; C10N2030/12
Claims Analysis
Total Claims: 31
Claim 1
Independent Claim
83 words
A corrosion inhibitor for hydrocarbonaceous liquid processing systems comprised of an amide having the structural formula: ##STR5## wherein R is a straight or branched chain alkylene group having 2 to 6 carbon atoms; x is an integer of 0 to 12; R', R" and R'" are the same or different alkyl groups and the average sum of the carbon atoms in R', R" and R'" varies from 3 to 20, and R"" is an aliphatic hydrocarbon radical having 9 to 29 carbon atoms.
Claim 2
Dependent Claim
83 words
A corrosion inhibitor for hydrocarbonaceous liquid processing systems comprised of an amide having the structural formula: ##STR5## wherein R is a straight or branched chain alkylene group having 2 to 6 carbon atoms; x is an integer of 0 to 12; R', R" and R'" are the same or different alkyl groups and the average sum of the carbon atoms in R', R" and R'" varies from 3 to 20, and R"" is an aliphatic hydrocarbon radical having 9 to 29 carbon atoms.
Claim 3
Dependent Claim
20 words
The corrosion inhibitor of claim 1 wherein R is ethylene, propylene or butylene and x is 0, 1 or 2.
Claim 4
Dependent Claim
25 words
The corrosion inhibitor of claims 1 or 2 wherein the average sum of the carbon atoms in R', R" and R'" is 3 to 18.
Claim 5
Dependent Claim
16 words
The corrosion inhibitor of claims 1 or 2 wherein R', R" and R'" are methyl radicals.
Claim 6
Dependent Claim
22 words
The corrosion inhibitor of claims 1 or 2 wherein the sum of the carbon atoms in R', R" and R'" is 8.
Claim 7
Dependent Claim
22 words
The corrosion inhibitor of claims 1 or 2 wherein the sum of the carbon atom in R', R" and R'" is 18.
Claim 8
Dependent Claim
14 words
The corrosion inhibitor of claim 3 wherein R"" has 11 to 19 carbon atoms.
Claim 9
Dependent Claim
14 words
The corrosion inhibitor of claim 4 wherein R"" has 11 to 19 carbon atoms.
Claim 10
Dependent Claim
14 words
The corrosion inhibitor of claim 5 wherein R"" has 11 to 19 carbon atoms.
Claim 11
Dependent Claim
14 words
The corrosion inhibitor of claim 6 wherein R"" has 11 to 19 carbon atoms.
Claim 12
Dependent Claim
20 words
The corrosion inhibitor of claim 7 wherein R"" is an ethylenically unsaturated aliphatic radical having 13 to 17 carbon atoms.
Claim 13
Dependent Claim
20 words
The corrosion inhibitor of claim 8 wherein R"" is an ethylenically unsaturated aliphatic radical having 13 to 17 carbon atoms.
Claim 14
Dependent Claim
20 words
The corrosion inhibitor of claim 9 wherein R"" is an ethylenically unsaturated aliphatic radical having 13 to 17 carbon atoms.
Claim 15
Dependent Claim
20 words
The corrosion inhibitor of claim 10 wherein R"" is an ethylenically unsaturated aliphatic radical having 13 to 17 carbon atoms.
Claim 16
Dependent Claim
22 words
The corrosion inhibitor of claim 3 wherein the ##STR6## radical is derived substantially from oleic acid, linoleic acid or mixtures of these.
Claim 17
Dependent Claim
109 words
In a method of inhibiting metal corrosion in hydrocarbonaceous liquid processing equipment by the introduction of amide-based corrosion inhibiting compositions into the equipment, the improvement comprising using a corrosion inhibiting composition containing as the principal component a compound having the structural formula: ##STR7## wherein x is an integer having a value of 0 to 12, R is a straight or branched chain alkylene group having 2 to 6 carbon atoms, R' R" and R'" are alkyl groups and the average sum of the carbon atoms contained in R' R" and R'" varies from 3 to 20 and R"" is an aliphatic hydrocarbon radical having 9 to 29 carbon atoms.
Claim 18
Dependent Claim
109 words
In a method of inhibiting metal corrosion in hydrocarbonaceous liquid processing equipment by the introduction of amide-based corrosion inhibiting compositions into the equipment, the improvement comprising using a corrosion inhibiting composition containing as the principal component a compound having the structural formula: ##STR7## wherein x is an integer having a value of 0 to 12, R is a straight or branched chain alkylene group having 2 to 6 carbon atoms, R' R" and R'" are alkyl groups and the average sum of the carbon atoms contained in R' R" and R'" varies from 3 to 20 and R"" is an aliphatic hydrocarbon radical having 9 to 29 carbon atoms.
Claim 19
Dependent Claim
27 words
The method of claim 16 wherein R is the ethylene, propylene or butylene radical and x is an integer having a value of 0, 1 or 2.
Claim 20
Independent Claim
24 words
The method of claims 16 or 17 wherein the average sum of the carbon atoms in R', R" and R'" is 3 to 18.
Claim 21
Independent Claim
15 words
The method of claims 16 or 17 wherein R', R" and R'" are methyl radicals.
Claim 22
Independent Claim
21 words
The method of claims 16 or 17 wherein the sum of the carbon atoms in R', R" and R'" is 8.
Claim 23
Independent Claim
21 words
The method of claims 16 or 17 wherein the sum of the carbon atoms in R', R" and R'" is 18.
Claim 24
Dependent Claim
18 words
The method of claim 18 wherein R"" is an aliphatic hydrocarbon radical having 11 to 19 carbon atoms.
Claim 25
Dependent Claim
20 words
The method of claim 22 wherein R"" is an ethylenically unsaturated aliphatic hydrocarbon radical having 13 to 17 carbon atoms.
Claim 26
Dependent Claim
21 words
The method of claim 23 wherein the ##STR8## radical is derived substantially from oleic acid, linoleic acid and mixtures of these.
Claim 27
Dependent Claim
104 words
A process for preparing a corrosion inhibitor composition comprising reacting, at a temperature of about 50° to 250° C., (a) a polyamine having the structural formula NH.sub.2 (NHR).sub.x --NH.sub.2 wherein R is a straight or branched chain alkylene group having 2 to 6 carbon atoms and x is an integer having a value of 0 to 12, (b) a carboxylic acid having the structural formula ##STR9## wherein R', R" and R'" are alkyl groups and the average total sum of the carbon atoms in R', R" and R'" is 3 to 20, and (c) an aliphatic fatty acid having 10 to 30 carbon atoms.
Claim 28
Dependent Claim
104 words
A process for preparing a corrosion inhibitor composition comprising reacting, at a temperature of about 50° to 250° C., (a) a polyamine having the structural formula NH.sub.2 (NHR).sub.x --NH.sub.2 wherein R is a straight or branched chain alkylene group having 2 to 6 carbon atoms and x is an integer having a value of 0 to 12, (b) a carboxylic acid having the structural formula ##STR9## wherein R', R" and R'" are alkyl groups and the average total sum of the carbon atoms in R', R" and R'" is 3 to 20, and (c) an aliphatic fatty acid having 10 to 30 carbon atoms.
Claim 29
Dependent Claim
45 words
The process of claim 25 wherein R is ethylene, propylene or butylene; x is 0, 1 or 2; the average total sum of carbon atoms in R', R" and R'" is 3 to 18; and said aliphatic fatty acid has 12 to 20 carbon atoms.
Claim 30
Dependent Claim
20 words
The process of claim 26 wherein the aliphatic fatty acid is ethylenically unsaturated and contains 14 to 18 carbon atoms.
Claim 31
Dependent Claim
15 words
The process of claim 27 wherein the aliphatic fatty acid is tall oil fatty acid.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1987-04-03 | 1987-10-03 | 1988-04-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-04-03 | 1991-10-03 | 1992-04-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-04-03 | 1995-10-03 | 1996-04-03 | $7700.00 | Window Closed / Lapsed |