US4419105A
Expired / Lapsed
US
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Maleic anhydride-amine reaction product corrosion inhibitor for alcohols
Assignee: Texaco Inc
•
Filing: 1982-03-18
•
Granted: 1983-12-06
•
Expires: 2002-03-18
Abstract
Abstract Alcohols may be inhibited against corrosion by addition thereto of a reaction product of a maleic anhydride and certain amines typified by alkyl isopropoxy aminopropyl amines.
Inventors
- 👤 Rodney L. Sung
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 22:26
CPC Classifications
C; C10; C10L; C10L1/00; C10L1/10; C10L1/14; C10L1/22; C10L1/222; C10L1/2222; C10L1/2225; C10L1/224
Claims Analysis
Total Claims: 56
Claim 1
Independent Claim
76 words
A composition comprising (i) a water-soluble alcohol; and (ii) an effective corrosion-inhibiting amount of the reaction product of a maleic acid anhydride and an amine having the formula R(OR').sub.x [NH R").sub.a (OR"').sub.y(a-1) ]NH.sub.2 wherein R is a C 1 -C 20 alkyl, alkaryl, aralkyl, aryl, cycloalkyl, or alkenyl hydrocarbon group; R', R" and R"' are each a C 2 -C 5 alkylene hydrocarbon group; a is an integer 0-1 x is 1-20; and y is 1-20.
Claim 2
Dependent Claim
76 words
A composition comprising (i) a water-soluble alcohol; and (ii) an effective corrosion-inhibiting amount of the reaction product of a maleic acid anhydride and an amine having the formula R(OR').sub.x [NH R").sub.a (OR"').sub.y(a-1) ]NH.sub.2 wherein R is a C 1 -C 20 alkyl, alkaryl, aralkyl, aryl, cycloalkyl, or alkenyl hydrocarbon group; R', R" and R"' are each a C 2 -C 5 alkylene hydrocarbon group; a is an integer 0-1 x is 1-20; and y is 1-20.
Claim 3
Dependent Claim
71 words
A composition comprising (i) a water-soluble alcohol; and (ii) an effective corrosion-inhibiting amount of the reaction product of a maleic acid anhydride and an amine having the formula R(OR').sub.x NHR"NH.sub.2 wherein R is a C 1 -C 20 alkyl, alkaryl, aralkyl, aryl, cycloalkyl, or alkenyl hydrocarbon group; R' is a C 2 -C 5 alkylene hydrocarbon group; R" is a C 2 -C 5 alkylene hydrocarbon group; and X is 1-20.
Claim 4
Dependent Claim
71 words
A composition comprising (i) a water-soluble alcohol; and (ii) an effective corrosion-inhibiting amount of the reaction product of a maleic acid anhydride and an amine having the formula R(OR').sub.x NHR"NH.sub.2 wherein R is a C 1 -C 20 alkyl, alkaryl, aralkyl, aryl, cycloalkyl, or alkenyl hydrocarbon group; R' is a C 2 -C 5 alkylene hydrocarbon group; R" is a C 2 -C 5 alkylene hydrocarbon group; and X is 1-20.
Claim 5
Dependent Claim
17 words
A composition as claimed in claim 2 wherein R is a C 10 -C 12 alkyl hydrocarbon.
Claim 6
Dependent Claim
18 words
A composition as claimed in claim 2 wherein R is a C 1 -C 4 alkyl hydrocarbon group.
Claim 7
Dependent Claim
13 words
A composition as claimed in claim 2 wherein R is a methyl group.
Claim 8
Dependent Claim
17 words
A composition as claimed in claim 2 wherein R' is a C 2 -C 3 hydrocarbon group.
Claim 9
Dependent Claim
15 words
A composition as claimed in claim 2 wherein R' is --CH 2 CH 2 --.
Claim 10
Dependent Claim
11 words
A composition as claimed in claim 2 wherein R' is ##STR22##
Claim 11
Dependent Claim
17 words
A composition as claimed in claim 2 wherein R" is a C 2 -C 3 hydrocarbon group.
Claim 12
Dependent Claim
15 words
A composition as claimed in claim 2 wherein R" is --CH 2 CH 2 --.
Claim 13
Dependent Claim
11 words
A composition as claimed in claim 2 wherein R" is ##STR23##
Claim 14
Dependent Claim
12 words
A composition as claimed in claim 2 wherein said amine is ##STR24##
Claim 15
Dependent Claim
12 words
A composition as claimed in claim 2 wherein said alcohol is ethanol.
Claim 16
Dependent Claim
13 words
A composition as claimed in claim 2 wherein said alcohol is a gasohol.
Claim 17
Dependent Claim
25 words
A composition as claimed in claim 2 wherein said reaction product is present in effective corrosion-inhibiting amount of 10-200 pounds per thousand barrels of alcohol.
Claim 18
Dependent Claim
15 words
A composition as claimed in claim 2 wherein said reaction product has the formula ##STR25##
Claim 19
Dependent Claim
56 words
A composition comprising ethanol and 25-100 pounds per thousand barrels of ethanol of the reaction product of maleic acid anhydride and R(OR').sub.x NHR"NH.sub.2 wherein R is a C 1 -C 20 alkyl, alkaryl, aralkyl, aryl, cycloalkyl, or alkenyl hydrocarbon group; R' and R" are each a C 2 -C 5 alkylene hydrocarbon group; and is 1-20.
Claim 20
Dependent Claim
56 words
A composition comprising ethanol and 25-100 pounds per thousand barrels of ethanol of the reaction product of maleic acid anhydride and R(OR').sub.x NHR"NH.sub.2 wherein R is a C 1 -C 20 alkyl, alkaryl, aralkyl, aryl, cycloalkyl, or alkenyl hydrocarbon group; R' and R" are each a C 2 -C 5 alkylene hydrocarbon group; and is 1-20.
Claim 21
Independent Claim
85 words
The method of treating a composition containing at least one alcohol selected from the group consisting of ethanol and methanol which comprises adding to said composition an effective corrosion-inhibiting amount of the reaction product of a maleic acid anhydride and an amine R(OR').sub.x NHR"NH.sub.2 wherein R is a C 1 -C 20 alkyl, alkaryl, aralkyl, aryl, cycloalkyl, or alkenyl hydrocarbon group; R' is a C 2 -C 5 alkylene hydrocarbon group; R" is a CH 2 -C 5 alkylene hydrocarbon group; and x is 1-20.
Claim 22
Independent Claim
85 words
The method of treating a composition containing at least one alcohol selected from the group consisting of ethanol and methanol which comprises adding to said composition an effective corrosion-inhibiting amount of the reaction product of a maleic acid anhydride and an amine R(OR').sub.x NHR"NH.sub.2 wherein R is a C 1 -C 20 alkyl, alkaryl, aralkyl, aryl, cycloalkyl, or alkenyl hydrocarbon group; R' is a C 2 -C 5 alkylene hydrocarbon group; R" is a CH 2 -C 5 alkylene hydrocarbon group; and x is 1-20.
Claim 23
Dependent Claim
74 words
A composition comprising (i) a water-soluble alcohol; and (ii) an effective corrosion-inhibiting amount of the reaction product of one mole of a maleic acid anhydride and about two-moles of an amine R(OR') x (OR") y NH 2 wherein R is a C 1 -C 20 alkyl, alkaryl, aralkyl, aryl, cycloalkyl, or alkenyl hydrocarbon group; R' and R"' are each a C 2 -C 5 alkylene hydrocarbon group; x is 1-20; and y is 1-20.
Claim 24
Dependent Claim
74 words
A composition comprising (i) a water-soluble alcohol; and (ii) an effective corrosion-inhibiting amount of the reaction product of one mole of a maleic acid anhydride and about two-moles of an amine R(OR') x (OR") y NH 2 wherein R is a C 1 -C 20 alkyl, alkaryl, aralkyl, aryl, cycloalkyl, or alkenyl hydrocarbon group; R' and R"' are each a C 2 -C 5 alkylene hydrocarbon group; x is 1-20; and y is 1-20.
Claim 25
Dependent Claim
17 words
A composition as claimed in claim 19 wherein R is a C 10 -C 12 alkyl hydrocarbon.
Claim 26
Dependent Claim
18 words
A composition as claimed in claim 19 wherein R is a C 1 -C 4 alkyl hydrocarbon group.
Claim 27
Dependent Claim
13 words
A composition as claimed in claim 19 wherein R is a methyl group.
Claim 28
Dependent Claim
17 words
A composition as claimed in claim 19 wherein R' is a C 2 -C 3 hydrocarbon group.
Claim 29
Dependent Claim
15 words
A composition as claimed in claim 19 wherein R' is --CH 2 CH 2 --.
Claim 30
Dependent Claim
11 words
A composition as claimed in claim 19 wherein R' is ##STR26##
Claim 31
Dependent Claim
18 words
A composition as claimed in claim 19 wherein R" is a C 2 -C 3 alkylene hydrocarbon group.
Claim 32
Dependent Claim
15 words
A composition as claimed in claim 19 wherein R" is --CH 2 CH 2 --.
Claim 33
Dependent Claim
11 words
A composition as claimed in claim 19 wherein R" is ##STR27##
Claim 34
Dependent Claim
34 words
A composition as claimed in claim 19 wherein said amine is ##STR28## R is a mixture of linear C 10 -C 12 alkyl hydrocarbon groups and x has an average value of about 1.
Claim 35
Dependent Claim
12 words
A composition as claimed in claim 19 wherein said alcohol is ethanol.
Claim 36
Dependent Claim
13 words
A composition as claimed in claim 19 wherein said alcohol is a gasohol.
Claim 37
Dependent Claim
25 words
A composition as claimed in claim 19 wherein said reaction product is present in effective corrosion-inhibiting amount of 10-200 pounds per thousand barrels of alcohol.
Claim 38
Dependent Claim
15 words
A composition as claimed in claim 19 wherein said reaction product has the formula ##STR29##
Claim 39
Dependent Claim
51 words
A composition comprising ethanol and 10-200 pounds per thousand barrels of ethanol of the reaction product of one mole of maleic acid anhydride and about two moles of ##STR30## wherein R is a mixture of C 10 -C 12 alkyl hydrocarbon groups and x has an average value of about 1.
Claim 40
Dependent Claim
51 words
A composition comprising ethanol and 10-200 pounds per thousand barrels of ethanol of the reaction product of one mole of maleic acid anhydride and about two moles of ##STR30## wherein R is a mixture of C 10 -C 12 alkyl hydrocarbon groups and x has an average value of about 1.
Claim 41
Independent Claim
84 words
The method of treating a composition containing at least one alcohol selected from the group consisting of ethanol and methanol which comprises adding to said composition an effective corrosion-inhibiting amount of the reaction product of one mole of maleic acid anhydride and about two moles of R(OR').sub.x (OR").sub.y NH.sub.2 wherein R is a C.sub.1 -C.sub.20 alkyl, alkaryl, aralkyl, aryl, cycloalkyl, or alkenyl hydrocarbon group; R' and R"' are each a C 2 -C 5 alkylene hydrocarbon group; x is 1-20; and y is 1-20.
Claim 42
Independent Claim
84 words
The method of treating a composition containing at least one alcohol selected from the group consisting of ethanol and methanol which comprises adding to said composition an effective corrosion-inhibiting amount of the reaction product of one mole of maleic acid anhydride and about two moles of R(OR').sub.x (OR").sub.y NH.sub.2 wherein R is a C.sub.1 -C.sub.20 alkyl, alkaryl, aralkyl, aryl, cycloalkyl, or alkenyl hydrocarbon group; R' and R"' are each a C 2 -C 5 alkylene hydrocarbon group; x is 1-20; and y is 1-20.
Claim 43
Dependent Claim
64 words
A composition comprising the reaction product of a maleic acid anhydride and an amine having the formula: R(OR').sub.x [(NHR").sub.a (OR"').sub.y(1-a) ]NH.sub.2 wherein R is a C 1 -C 20 alkyl, alkaryl, aralkyl, aryl, cycloalkyl, or alkenyl hydrocarbon group; R', R" and R"' are each a C 2 -C 5 alkylene hydrocarbon group; a is an integer 0-1; x is 1-20; and y is 1-20.
Claim 44
Dependent Claim
64 words
A composition comprising the reaction product of a maleic acid anhydride and an amine having the formula: R(OR').sub.x [(NHR").sub.a (OR"').sub.y(1-a) ]NH.sub.2 wherein R is a C 1 -C 20 alkyl, alkaryl, aralkyl, aryl, cycloalkyl, or alkenyl hydrocarbon group; R', R" and R"' are each a C 2 -C 5 alkylene hydrocarbon group; a is an integer 0-1; x is 1-20; and y is 1-20.
Claim 45
Dependent Claim
60 words
A composition comprising the reaction product of a maleic acid anhydride and an amine having the formula: R(OR').sub.x NHR"NH.sub.2 wherein R is a C 1 -C 20 alkyl, alkaryl, aralkyl, aryl, cycloalkyl, or alkenyl hydrocarbon group; R' is a C 2 -C 5 alkylene hydrocarbon group; R" is a C 2 -C 5 alkylene hydrocarbon group; and x is 1-20.
Claim 46
Dependent Claim
60 words
A composition comprising the reaction product of a maleic acid anhydride and an amine having the formula: R(OR').sub.x NHR"NH.sub.2 wherein R is a C 1 -C 20 alkyl, alkaryl, aralkyl, aryl, cycloalkyl, or alkenyl hydrocarbon group; R' is a C 2 -C 5 alkylene hydrocarbon group; R" is a C 2 -C 5 alkylene hydrocarbon group; and x is 1-20.
Claim 47
Dependent Claim
16 words
A composition comprising the reaction product of maleic acid anhydride and tridecyl oxypropyl amino isopropyl amine.
Claim 48
Dependent Claim
16 words
A composition comprising the reaction product of maleic acid anhydride and tridecyl oxypropyl amino isopropyl amine.
Claim 49
Dependent Claim
1 words
##STR31##
Claim 50
Dependent Claim
1 words
##STR31##
Claim 51
Dependent Claim
53 words
A composition comprising the reaction product of a maleic acid anhydride and an amine having the formula: R(OR').sub.x (OR"').sub.y NH.sub.2 wherein R is a C 1 -C 20 alkyl, alkaryl, aralkyl, aryl, cycloalkyl, or alkenyl hydrocarbon group; R' and R" are each C 2 -C 5 alkylene hydrocarbon group; and x is 1-20.
Claim 52
Dependent Claim
53 words
A composition comprising the reaction product of a maleic acid anhydride and an amine having the formula: R(OR').sub.x (OR"').sub.y NH.sub.2 wherein R is a C 1 -C 20 alkyl, alkaryl, aralkyl, aryl, cycloalkyl, or alkenyl hydrocarbon group; R' and R" are each C 2 -C 5 alkylene hydrocarbon group; and x is 1-20.
Claim 53
Dependent Claim
15 words
A composition comprising the reaction product of a maleic acid anhydride and an amine: ##STR32##
Claim 54
Dependent Claim
15 words
A composition comprising the reaction product of a maleic acid anhydride and an amine: ##STR32##
Claim 55
Dependent Claim
1 words
##STR33##
Claim 56
Dependent Claim
1 words
##STR33##
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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) | 1986-12-05 | 1987-06-06 | 1987-12-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-12-05 | 1991-06-06 | 1991-12-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-12-05 | 1995-06-06 | 1995-12-06 | $7700.00 | Window Closed / Lapsed |