Patent US4465620A successfully refreshed from Google Patents.
US4465620A
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Prevention of copper plating during chemical cleaning operations
Assignee: Baker Petrolite LLC
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Filing: 1983-08-01
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Granted: 1984-08-14
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Expires: 2003-08-01
Abstract
Abstract There is provided a composition which inhibits corrosion and copper plate-out during chemical cleaning of a steam or water carrying system. The composition comprises an alpha -aminoalkylsulfide and a surface active agent.
Inventors
- 👤 Neil E. S. Thompson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 12:31
CPC Classifications
C; C23; C23G; C23G1/00; C23G1/02; C11; C11D; C11D3/00; C11D3/16; C11D3/34; C11D3/349; C11D3/3427; C11D3/3481
Claims Analysis
Total Claims: 24
Claim 1
Independent Claim
16 words
Composition comprising a blend of at least one α-aminoalkylsulfide and at least one surface active agent.
Claim 2
Dependent Claim
16 words
Composition comprising a blend of at least one α-aminoalkylsulfide and at least one surface active agent.
Claim 3
Dependent Claim
72 words
Composition of claim 1 wherein said α-aminoalkylsulfide is represented by the formula ##STR29## wherein R 1 , R 2 , R 3 , R 4 R 5 are the same or different and independently represent hydrogen, a hydrocarbon group or a substituted hydrocarbon group and wherein at least two of R 1 , R 2 , R 3 , R 4 , R 5 may be joined to form a heterocyclic ring.
Claim 4
Dependent Claim
11 words
Composition of claim 2 wherein said α-aminoalkylsulfide is di(hydroxyethyl) aminomethyl octylsulfide.
Claim 5
Dependent Claim
11 words
Composition of claim 2 wherein said α-aminoalkylsulfide is di(butyl) aminomethyl dodecylsulfide.
Claim 6
Dependent Claim
10 words
Composition of claim 2 wherein said α-aminoalkylsulfide is diallylaminomethyl octylsulfide.
Claim 7
Dependent Claim
11 words
Composition of claim 1 wherein said surface active agent is anionic.
Claim 8
Dependent Claim
11 words
Composition of claim 1 wherein said surface active agent is cationic.
Claim 9
Dependent Claim
11 words
Composition of claim 1 wherein said surface active agent is nonionic.
Claim 10
Dependent Claim
42 words
Composition of claim 8 wherein said nonionic surface active agent is represented by the formula ##STR30## wherein R is a hydrocarbon group; X is sulfur, oxygen or nitrogen; and a and b independently represent a number of from 0 to about 30.
Claim 11
Dependent Claim
21 words
Composition of claim 9 wherein said surface active agent is a mixture of ethoxylated, propoxylated linear C 8 -C 10 alcohols.
Claim 12
Dependent Claim
38 words
Composition of claim 9 which is represented by the formula ##STR31## wherein R 6 and R 7 independently represent 4-10 carbon atom linear or branched-chain carbon radicals; and x represents a number of from 2 to about 10.
Claim 13
Dependent Claim
15 words
Composition of claim 11 wherein R 6 and R 7 each represent a nonyl radical.
Claim 14
Dependent Claim
28 words
Composition of claim 1 wherein said blend comprises di(hydroxyethyl) aminomethyl octyl sulfide, a mixture of ethoxylated, propoxylated linear C 8 -C 10 alcohols and an ethoxylated dinonyl phenol.
Claim 15
Dependent Claim
27 words
Composition of claim 1 wherein said blend comprises di(butyl) aminomethyl dodecylsulfide, a mixture of ethoxylated, propoxylated linear C 8 -C 10 alcohols and an ethoxylated dinonyl phenol.
Claim 16
Dependent Claim
27 words
Composition of claim 1 wherein said blend comprises diallylaminomethyl octyl sulfide, a mixture of ethoxylated, propoxylated linear C 8 -C 10 alcohols and an ethoxylated dinonyl phenol.
Claim 17
Dependent Claim
34 words
Method of inhibiting corrosion and copper plate-out during chemical cleaning of a system in contact with steam and/or condensate comprising adding to said system an effective inhibiting amount of a composition of claim 1.
Claim 18
Dependent Claim
12 words
Method of claim 16 wherein said system is a steam generation plant.
Claim 19
Dependent Claim
10 words
Method of claim 16 wherein said system is a condenser.
Claim 20
Dependent Claim
11 words
Method of claim 16 wherein said system is a heat exchanger.
Claim 21
Dependent Claim
10 words
Method of claim 16 wherein said system is a boiler.
Claim 22
Dependent Claim
33 words
Single fill acid cleaning process for cleaning a system in contact with steam and/or condensate comprising adding to said system an acid and an effective inhibiting amount of a composition of claim 1.
Claim 23
Dependent Claim
20 words
Composition comprising aqueous hydrochloric acid and a blend of at least one α-aminoalkylsulfide and at least one surface active agent.
Claim 24
Dependent Claim
20 words
Composition comprising aqueous hydrochloric acid and a blend of at least one α-aminoalkylsulfide and at least one surface active agent.
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) | 1987-08-14 | 1988-02-13 | 1988-08-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-08-14 | 1992-02-13 | 1992-08-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-08-14 | 1996-02-13 | 1996-08-14 | $7700.00 | Window Closed / Lapsed |