Patent US3718604A successfully refreshed from Google Patents.
US3718604A
Expired / Lapsed
US
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Corrosion inhibitor containing a water soluble emulsion of a fatty amine with a cationic emulsifier
Assignee: Individual
•
Filing: 1970-08-27
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Granted: 1973-02-27
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Expires: 1990-08-27
Abstract
Abstract A composition and method for inhibiting steam-corrosion, comprising adding to the water a stable, cationic, fatty amine emulsion which breaks down upon heating, thereby allowing the fatty amine to enter the vapor phase and coat the interior surfaces exposed to the steam. Optionally, an ethoxylated straight chain aliphatic acid may be added where the boiler water containers inorganic salt impurities, or is at a high temperature in order to maintain stability of the emulsion.
Inventors
- 👤 G Scherf
- 👤 G Pfaff
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 19:49
CPC Classifications
C; C23; C23F; C23F11/00; C23F11/02; Y; Y10; Y10S; Y10S516/00; Y10S516/01; Y10S516/06
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
2 words
tallow amine
Claim 2
Dependent Claim
13 words
A composition according to claim 1 in which said fatty amine is octadecylamine.
Claim 3
Dependent Claim
15 words
A composition according to claim 1 in which said fatty amine is hydrogenated tallow amine.
Claim 4
Dependent Claim
3 words
hydrogenated tallow amine
Claim 5
Dependent Claim
12 words
branched alkyl amines containing from about 12 to about 22 carbon atoms,
Claim 6
Dependent Claim
15 words
A composition according to claim 1 in which said cationic emulsifier is dodecyl isothiouronium chloride.
Claim 7
Dependent Claim
16 words
A composition according to claim 1 in which said cationic emulsifier is paraffin wax isothiouronium chloride.
Claim 8
Dependent Claim
95 words
a mixture of any of the above said amines, and B. from about 1 to about 7 parts by weight of a cationic emulsifier having the general formula where R is a alkyl hydrocarbon having from about 10 to about 22 carbon atoms and R'' is one of a group consisting of an acetate, a bromide, a chloride, and a sulfate; and C. from 0 to about 7 parts by weight of an emulsion stabilizer consisting of an ethoxylated straight chain unsubstituted acid containing from about 14 to about 20 carbon atoms in the chain.
Claim 9
Dependent Claim
20 words
A composition according to claim 1 in which the emulsion stabilizer is present in up to 7 parts by weight.
Claim 10
Dependent Claim
26 words
A composition according to claim 6 in which said emulsion stabilizer is octadecanoic acid ethoxylated with from about 5 to about 25 moles of ethylene oxide.
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) | 1976-02-27 | 1976-08-28 | 1977-02-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-02-27 | 1980-08-28 | 1981-02-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-02-27 | 1984-08-28 | 1985-02-27 | $7700.00 | Window Closed / Lapsed |