US4392867A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Amino corrosion inhibitor for alcohols
Assignee: Texaco Inc
•
Filing: 1981-12-14
•
Granted: 1983-07-12
•
Expires: 2001-12-14
Abstract
Abstract Alcohols may be inhibited against corrosion by addition thereto of an amine [R(OR') n ] a --NH 3-a typically dodecyloxy-(isopropoxy)-isopropylamine.
Inventors
- 👤 Rodney L. Sung
- 👤 William M. Sweeney
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 05:53
CPC Classifications
C; C10; C10L; C10L1/00; C10L1/10; C10L1/14; C10L1/22; C10L1/222; C10L1/2222; C10L1/2225
Claims Analysis
Total Claims: 24
Claim 1
Independent Claim
86 words
A composition comprising: (i) a water-soluble alcohol; and (ii) an effective corrosion-inhibiting amount, as corrosion inhibiting additive, of an amine having the formula: [R(OR').sub.n ].sub.a --NH.sub.3-a wherein R contains 4-30 carbon atoms and is selected from the group consisting of alkyl, alkenyl, alkaryl, aralkyl, cycloalkyl, and aryl groups and R' is a divalent hydrocarbon group containing 1-30 carbon atoms and is selected from the group consisting of alkylene, alkenylene, alkarylene, aralkylene, cycloalkylene, and arylene groups, n is an integer 2-30, and a is an integer 1-3.
Claim 2
Dependent Claim
86 words
A composition comprising: (i) a water-soluble alcohol; and (ii) an effective corrosion-inhibiting amount, as corrosion inhibiting additive, of an amine having the formula: [R(OR').sub.n ].sub.a --NH.sub.3-a wherein R contains 4-30 carbon atoms and is selected from the group consisting of alkyl, alkenyl, alkaryl, aralkyl, cycloalkyl, and aryl groups and R' is a divalent hydrocarbon group containing 1-30 carbon atoms and is selected from the group consisting of alkylene, alkenylene, alkarylene, aralkylene, cycloalkylene, and arylene groups, n is an integer 2-30, and a is an integer 1-3.
Claim 3
Dependent Claim
14 words
A composition as claimed in claim 1 wherein said water-soluble alcohol composition contains ethanol.
Claim 4
Dependent Claim
14 words
A composition as claimed in claim 1 wherein said water-soluble alcohol composition contains methanol.
Claim 5
Dependent Claim
17 words
A composition as claimed in claim 1 wherein said water-soluble alcohol composition contains anhydrous methanol or ethanol.
Claim 6
Dependent Claim
18 words
A composition as claimed in claim 1 wherein said water-soluble alcohol composition contains ethanol together with acidic contaminants.
Claim 7
Dependent Claim
13 words
A composition as claimed in claim 1 wherein said additive is: [ROR'OR'OR'].sub.a --NH.sub.3-a.
Claim 8
Dependent Claim
13 words
A composition as claimed in claim 1 wherein said additive is: [ROR'OR].sub.a --NH.sub.3-a.
Claim 9
Dependent Claim
22 words
A composition as claimed in claim 1 wherein said additive is: [ROR'OR'OR'].sub.a NH.sub.3-a and all of said R' groups are the same.
Claim 10
Dependent Claim
22 words
A composition as claimed in claim 1 wherein said additive is: [ROR'OR'].sub.a NH.sub.3-a and all of said R' groups are the same.
Claim 11
Dependent Claim
12 words
A composition as claimed in claim 1 wherein said additive is: [ROR'OR'OR']NH.sub.2.
Claim 12
Dependent Claim
12 words
A composition as claimed in claim 1 wherein said additive is: [ROR'OR']NH.sub.2.
Claim 13
Dependent Claim
17 words
A composition as claimed in claim 1 wherein R is an alkyl group containing 6-15 carbon atoms.
Claim 14
Dependent Claim
17 words
A composition as claimed in claim 1 wherein R' is an alkylene group containing 2-3 carbon atoms.
Claim 15
Dependent Claim
14 words
A composition as claimed in claim 1 wherein said additive is dodecyloxy-(isopropoxy) isopropyl amine.
Claim 16
Dependent Claim
14 words
A composition as claimed in claim 1 wherein said additive is dodecyloxy-(ethyl) isopropyl amine.
Claim 17
Dependent Claim
14 words
A composition as claimed in claim 1 wherein said additive is dodecyloxy-(ethoxy) ethyl amine.
Claim 18
Dependent Claim
19 words
A composition as claimed in claim 1 wherein said corrosion-inhibiting additive is present in corrosion-inhibiting amount of 25-250 PTB.
Claim 19
Dependent Claim
17 words
A composition comprising: (i) at least one of ethanol and methanol; and (ii) 25-250 PTB of dodecyloxy-(isopropoxy)-isopropylamine.
Claim 20
Dependent Claim
17 words
A composition comprising: (i) at least one of ethanol and methanol; and (ii) 25-250 PTB of dodecyloxy-(isopropoxy)-isopropylamine.
Claim 21
Independent Claim
86 words
The method of inhibiting against corrosion a water-soluble alcohol composition which comprises adding to said water-soluble alcohol composition an amine having the formula; [R(OR').sub.n ].sub.a --NH.sub.3-a wherein R contains 4-30 carbon atoms and is selected from the group consisting of alkyl, alkenyl, alkaryl, aralkyl, cycloalkyl, and aryl groups and R' is a divalent hydrocarbon group containing 1-30 carbon atoms and is selected from the group consisting of alkylene, alkenylene, alkarylene, aralkylene, cycloalkylene, and arylene groups, n is an integer 2-30, and a is an integer 1-3.
Claim 22
Independent Claim
86 words
The method of inhibiting against corrosion a water-soluble alcohol composition which comprises adding to said water-soluble alcohol composition an amine having the formula; [R(OR').sub.n ].sub.a --NH.sub.3-a wherein R contains 4-30 carbon atoms and is selected from the group consisting of alkyl, alkenyl, alkaryl, aralkyl, cycloalkyl, and aryl groups and R' is a divalent hydrocarbon group containing 1-30 carbon atoms and is selected from the group consisting of alkylene, alkenylene, alkarylene, aralkylene, cycloalkylene, and arylene groups, n is an integer 2-30, and a is an integer 1-3.
Claim 23
Independent Claim
80 words
The method of inhibiting against corrosion a water-soluble alcohol composition which comprises adding to said water-soluble alcohol composition an amine having the formula: [R(OR')].sub.n --NH.sub.2 wherein R contains 4--30 carbon atoms and is selected from the group consisting of alkyl, alkenyl, alkaryl, aralkyl, cycloalkyl, and aryl groups and R' is a divalent hydrocarbon group containing 1--30 carbon atoms and is selected from the group consisting of alkylene, alkenylene, alkarylene, aralkylene, cycloalkylene, and arylene groups, and n is an integer 2--30.
Claim 24
Independent Claim
80 words
The method of inhibiting against corrosion a water-soluble alcohol composition which comprises adding to said water-soluble alcohol composition an amine having the formula: [R(OR')].sub.n --NH.sub.2 wherein R contains 4--30 carbon atoms and is selected from the group consisting of alkyl, alkenyl, alkaryl, aralkyl, cycloalkyl, and aryl groups and R' is a divalent hydrocarbon group containing 1--30 carbon atoms and is selected from the group consisting of alkylene, alkenylene, alkarylene, aralkylene, cycloalkylene, and arylene groups, and n is an integer 2--30.
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) | 1986-07-11 | 1987-01-10 | 1987-07-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-07-11 | 1991-01-10 | 1991-07-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-07-11 | 1995-01-10 | 1995-07-12 | $7700.00 | Window Closed / Lapsed |