Patent US4071746A successfully refreshed from Google Patents.
US4071746A
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Alkylbenzyl pyridinium compounds and uses
Assignee: Baker Petrolite LLC
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Filing: 1976-06-22
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Granted: 1978-01-31
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Expires: 1996-06-22
Abstract
Abstract Alkylbenzyl pyridinium compounds, for example of the general formula ##STR1## where R is a hydrocarbon group, preferably alkyl, occurring n times in the ring such as 1-3, but preferably 1 or 2; and R' is a hydrocarbon group, preferably alkyl, occurring m times, such as 1-3, but preferably 1, and X - is an anion, preferably halogen. These compositions are employed as corrosion inhibitors, preferably in acid systems. These are preferably employed as corrosion inhibitors with surfactants, and most preferably with surfactants and alcohols.
Inventors
- 👤 Patrick M. Quinlan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 17:39
CPC Classifications
C; C23; C23F; C23F11/00; C23F11/04; C23F11/08; C23F11/10; C23F11/14; C23F11/149; C23G; C23G1/00; C23G1/02; C23G1/04; C23G1/06; C23G1/063
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
70 words
An acid corrosion inhibiting composition comprising 1. substituted benzyl pyridinium compounds having the formula ##STR26## where ##STR27## is a pyridinium group, R' is an alkyl group occurring as a substituent m times, and m is 1 to 2, X is an anion, said benzyl pyridinium compounds being formed by reacting a mixture of alkyl pyridines with the compound of the formula ##STR28## and 2. an oxyalkylated surfactant or an alcohol.
Claim 2
Dependent Claim
70 words
An acid corrosion inhibiting composition comprising 1. substituted benzyl pyridinium compounds having the formula ##STR26## where ##STR27## is a pyridinium group, R' is an alkyl group occurring as a substituent m times, and m is 1 to 2, X is an anion, said benzyl pyridinium compounds being formed by reacting a mixture of alkyl pyridines with the compound of the formula ##STR28## and 2. an oxyalkylated surfactant or an alcohol.
Claim 3
Dependent Claim
16 words
The composition of claim 1 where there is present both an oxyalkylated surfactant and an alcohol.
Claim 4
Dependent Claim
11 words
The composition of claim 1 where ##STR29## and X is halide.
Claim 5
Dependent Claim
20 words
The composition of claim 1 where the oxyalkylated surfactant is a nonyl phenol condensed with 10 moles of ethylene oxide.
Claim 6
Dependent Claim
10 words
The composition of claim 1 where the alcohol is isopropanol.
Claim 7
Dependent Claim
36 words
The composition of claim 6 where the pyridinium compound is a dodecyl benzyl alkyl substituted pyridinium chloride, the oxyalkylated surfactant is a nonyl phenol condensed with 10 moles of ethylene oxide and the alcohol is isopropanol.
Claim 8
Dependent Claim
31 words
The composition of claim 3 where the oxyalkylated surfactant is a nonyl phenol condensed with 10 moles of ethylene oxide and the alcohol is a mixture of propargyl alcohol and isopropanol.
Claim 9
Dependent Claim
27 words
A process of inhibiting corrosion of metals in an acid system which comprises adding to said system an acid inhibiting amount of the composition of claim 1.
Claim 10
Dependent Claim
27 words
A process of inhibiting corrosion of metals in an acid system which comprises adding to said system an acid inhibiting amount of the composition of claim 2.
Claim 11
Dependent Claim
27 words
A process of inhibiting corrosion of metals in an acid system which comprises adding to said system an acid inhibiting amount of the composition of claim 3.
Claim 12
Dependent Claim
27 words
A process of inhibiting corrosion of metals in an acid system which comprises adding to said system an acid inhibiting amount of the composition of claim 4.
Claim 13
Dependent Claim
27 words
A process of inhibiting corrosion of metals in an acid system which comprises adding to said system an acid inhibiting amount of the composition of claim 5.
Claim 14
Dependent Claim
27 words
A process of inhibiting corrosion of metals in an acid system which comprises adding to said system an acid inhibiting amount of the composition of claim 6.
Claim 15
Dependent Claim
27 words
A process of inhibiting corrosion of metals in an acid system which comprises adding to said system an acid inhibiting amount of the composition of claim 7.
References Cited (Backward Citations)
US3288555A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1981-01-30 | 1981-08-01 | 1982-01-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-01-30 | 1985-08-01 | 1986-01-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-01-30 | 1989-08-01 | 1990-01-31 | $7700.00 | Window Closed / Lapsed |