US3997469A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Corrosion inhibition with oil soluble diamides
Assignee: ChampionX LLC
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Filing: 1975-02-26
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Granted: 1976-12-14
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Expires: 1995-02-26
Abstract
Abstract Hydrocarbon liquids having a pH greater than 7 are inhibited against corrosion by the addition thereto of a corrosion inhibiting amount of a diamide or mixture of diamides of 1,3-dipropylene triamine and one or more organic monocarboxylic acids containing a sufficient number of carbon atoms to render said diamide or mixture of diamides oil soluble and water insoluble.
Inventors
- 👤 Charles L. Howle
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 13:47
CPC Classifications
C; C10; C10L; C10L1/00; C10L1/10; C10L1/14; C10L1/22; C10L1/222; C10L1/224; C10G; C10G75/00; C10G75/02; C23; C23F; C23F11/00; C23F11/08; C23F11/10; Y; Y10; Y10S; Y10S507/00; Y10S507/939
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
74 words
A process of inhibiting corrosion of metals in contact with liquid petroleum hydrocarbons having a pH in excess of 7 which comprises adding to said hydrocarbons a corrosion inhibiting amount of a diamide or mixture of diamides which is the product of the reaction of 1,3-dipropylene triamine and one or more organic monocarboxylic acids containing a sufficient number of carbon atoms to render said diamide or mixture of diamides oil soluble and water insoluble.
Claim 2
Dependent Claim
74 words
A process of inhibiting corrosion of metals in contact with liquid petroleum hydrocarbons having a pH in excess of 7 which comprises adding to said hydrocarbons a corrosion inhibiting amount of a diamide or mixture of diamides which is the product of the reaction of 1,3-dipropylene triamine and one or more organic monocarboxylic acids containing a sufficient number of carbon atoms to render said diamide or mixture of diamides oil soluble and water insoluble.
Claim 3
Dependent Claim
17 words
A process as claimed in claim 1 in which the petroleum hydrocarbons contain corrosive amounts of sulfur.
Claim 4
Dependent Claim
21 words
A process as claimed in claim 1 in which said diamide is a diamide of petroleum naphthenic acids and 1,3-dipropylene triamine.
Claim 5
Dependent Claim
64 words
Hydrocarbon liquids having a pH greater than 7 inhibited against corrosion by the addition thereto of a corrosion inhibiting amount of a diamide or mixture of diamides which is the product of the reaction of 1,3-dipropylene triamine and one or more organic monocarboxylic acids containing a sufficient number of carbon atoms to render said diamide or mixture of diamides oil soluble and water insoluble.
Claim 6
Dependent Claim
64 words
Hydrocarbon liquids having a pH greater than 7 inhibited against corrosion by the addition thereto of a corrosion inhibiting amount of a diamide or mixture of diamides which is the product of the reaction of 1,3-dipropylene triamine and one or more organic monocarboxylic acids containing a sufficient number of carbon atoms to render said diamide or mixture of diamides oil soluble and water insoluble.
Claim 7
Dependent Claim
17 words
Hydrocarbon liquids as claimed in claim 4 in which said hydrocarbon liquids contain corrosive amounts of sulfur.
Claim 8
Dependent Claim
21 words
Hydrocarbon liquids as claimed in claim 4 in which said diamide is a diamide of petroleum naphthenic acids and 1,3-dipropylene triamine.
Claim 9
Dependent Claim
65 words
A diamide or mixture of diamides which is the product of the reaction of 1,3-dipropylene triamine and one or more organic monocarboxylic acids containing a sufficient number of carbon atoms to render said diamide or mixture of diamides oil soluble and water insoluble, said diamide having the general formula ##STR2## wherein R 1 and R 2 are hydrocarbon radicals containing 5 to 19 carbon atoms.
Claim 10
Dependent Claim
65 words
A diamide or mixture of diamides which is the product of the reaction of 1,3-dipropylene triamine and one or more organic monocarboxylic acids containing a sufficient number of carbon atoms to render said diamide or mixture of diamides oil soluble and water insoluble, said diamide having the general formula ##STR2## wherein R 1 and R 2 are hydrocarbon radicals containing 5 to 19 carbon atoms.
Claim 11
Dependent Claim
23 words
A diamide or mixture of diamides as claimed in claim 7 wherein R 1 and R 2 are hydrocarbon radicals of naphthenic 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) | 1979-12-14 | 1980-06-14 | 1980-12-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-12-14 | 1984-06-14 | 1984-12-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-12-14 | 1988-06-14 | 1988-12-14 | $7700.00 | Window Closed / Lapsed |