Patent US4120654A successfully refreshed from Google Patents.
US4120654A
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Alkynoxymethyl amines as corrosion inhibitors
Assignee: Baker Petrolite LLC
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Filing: 1976-12-29
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Granted: 1978-10-17
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Expires: 1996-12-29
Abstract
Abstract This invention relates to alkynoxymethyl amines, to methods of preparing them, and uses thereof, particularly as corrosion inhibitors. These compounds are prepared by reacting an amine, such as RNH 2 , with an aldehyde, such as formaldehyde, and an alkynol, such as propargyl alcohol, to yield compounds of the formula RN(CH.sub.2 OR').sub.2 where R is a substituted group, preferably alkyl, cycloalkyl, aryl, etc., and R' is an acetylenic alcohol moiety.
Inventors
- 👤 Patrick M. Quinlan
- 👤 Richard D. McBride
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 06:12
CPC Classifications
C; C23; C23F; C23F11/00; C23F11/08; C23F11/10; C23F11/14; C23F11/141; C23F11/142; C23F11/04; Y; Y10; Y10S; Y10S507/00; Y10S507/933; Y10S507/934
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
52 words
A process of inhibiting corrosion of metals in contact with aqueous or oil-based acid systems which comprises adding to said system a small amount effective to inhibit the corrosion of said metals of a compound of the formula RN(CH.sub.2 -OR').sub.2 where R is a hydrocarbon group and R' is an acetylenic moiety.
Claim 2
Dependent Claim
52 words
A process of inhibiting corrosion of metals in contact with aqueous or oil-based acid systems which comprises adding to said system a small amount effective to inhibit the corrosion of said metals of a compound of the formula RN(CH.sub.2 -OR').sub.2 where R is a hydrocarbon group and R' is an acetylenic moiety.
Claim 3
Dependent Claim
15 words
The process of claim 1 where R in the compound is alkyl, cycloalkyl, or aryl.
Claim 4
Dependent Claim
12 words
The process of claim 2 where R in the compound is alkyl.
Claim 5
Dependent Claim
13 words
The process of claim 3 wherein the R' in the compound is propargyl.
Claim 6
Dependent Claim
21 words
The process of claim 4 where R in the compound is t-C 12 H 25 to t-C 14 H 29 .
Claim 7
Dependent Claim
27 words
The process of claim 1 where the alkynoxymethyl amine corrosion inhibitor is added in the amount of 1 p.p.m. to 10,000 p.p.m. of inhibitor of acid system.
Claim 8
Dependent Claim
27 words
The process of claim 1 where the amount of alkynoxymethyl amine corrosion inhibitor is added in the amount of 3,000 p.p.m. to 7,000 p.p.m. of acid system.
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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) | 1981-10-16 | 1982-04-17 | 1982-10-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-10-16 | 1986-04-17 | 1986-10-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-10-16 | 1990-04-17 | 1990-10-17 | $7700.00 | Window Closed / Lapsed |