US4564456A
Expired / Lapsed
US
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Method of treating water to inhibit corrosion and diminish mineral deposition
Assignee: Dow Silicones Corp
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Filing: 1984-06-01
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Granted: 1986-01-14
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Expires: 2004-06-01
Abstract
Abstract What is disclosed is a method for treating water to inhibit corrosion and diminish mineral deposition using certain cationic silanes in a neutral or basic pH environment. An example of the method is the use of (CH 3 O) 3 Si(CH 2 ) 3 N.sup.⊕ (CH 3 ) 2 C 18 H 37 Cl - in a humidifier unit.
Inventors
- 👤 Gary R. Homan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 12:22
CPC Classifications
C; C23; C23F; C23F11/00; C23F11/08; C23F11/10; C23F11/14; C23F11/141; C02; C02F; C02F5/00; C02F5/08; C02F5/10; C02F5/12; C23F14/00; C23F14/02; Y; Y10; Y10S; Y10S261/00; Y10S261/46
Claims Analysis
Total Claims: 33
Claim 1
Independent Claim
176 words
A method of treating water in order to inhibit corrosion and diminish mineral deposition in a neutral or basic pH, the method comprising adding to the water, in an amount sufficient to inhibit corrosion and diminish mineral deposition, an organosilane having a general formula selected from the group consisting of ##STR4## wherein, in each formula, R is an alkyl radical of 1 to 4 carbon atoms or hydrogen; a has a value of 0, 1 or 2; R' is an alkyl radical of 1 to 4 carbon atoms; R" is an alkylene group of 1 to 4 carbon atoms; R'",R"" and R v are each independently selected from a group consisting of alkyl radicals of 1 to 18 carbon atoms, --CH 2 C 6 H 5 , --CH 2 CH 2 OH, --CH 2 OH, and --(CH 2 ) x NHC(O)R vi , wherein x has a value of from 2 to 10 and R vi is a perfluoroalkyl radical having from 1 to 12 carbon atoms; X is chloride, bromide, fluoride, iodide, acetate or tosylate.
Claim 2
Independent Claim
176 words
A method of treating water in order to inhibit corrosion and diminish mineral deposition in a neutral or basic pH, the method comprising adding to the water, in an amount sufficient to inhibit corrosion and diminish mineral deposition, an organosilane having a general formula selected from the group consisting of ##STR4## wherein, in each formula, R is an alkyl radical of 1 to 4 carbon atoms or hydrogen; a has a value of 0, 1 or 2; R' is an alkyl radical of 1 to 4 carbon atoms; R" is an alkylene group of 1 to 4 carbon atoms; R'",R"" and R v are each independently selected from a group consisting of alkyl radicals of 1 to 18 carbon atoms, --CH 2 C 6 H 5 , --CH 2 CH 2 OH, --CH 2 OH, and --(CH 2 ) x NHC(O)R vi , wherein x has a value of from 2 to 10 and R vi is a perfluoroalkyl radical having from 1 to 12 carbon atoms; X is chloride, bromide, fluoride, iodide, acetate or tosylate.
Claim 3
Dependent Claim
137 words
A method as claimed in claim 1 wherein the organosilane has the formula ##STR5## wherein R is an alkyl radical of 1 to 4 carbon atoms or hydrogen; a has a value of 0, 1 or 2; R' is an alkyl radical of 1 to 4 carbon atoms; R" is an alkylene group of 1 to 4 carbon atoms; R'", R"" and R v are each independently selected from a group consisting of alkyl radicals of 1 to 18 carbon atoms, --CH 2 C 6 H 5 , --CH 2 CH 2 OH, --CH 2 OH, and --(CH 2 ) x NHC(O)R vi , wherein x has a value of from 2 to 10 and R vi is a perfluoroalkyl radical having from 1 to 12 carbon atoms; X is chloride, bromide, fluoride, iodide, acetate or tosylate.
Claim 4
Dependent Claim
29 words
A method as claimed in claim 2 wherein a is zero, R is methyl, R" is propylene, R"', R"" and R v are each methyl and X is chloride.
Claim 5
Dependent Claim
30 words
A method as claimed in claim 2 wherein a is zero; R is methyl, R" is propylene, R"' and R"" are methyl, R v is butyl and X is chloride.
Claim 6
Dependent Claim
29 words
A method as claimed in claim 2 wherein a is zero, R is methyl, R" is propylene, R"', R"" and R v are each ethyl and X is chloride.
Claim 7
Dependent Claim
31 words
A method as claimed in claim 2 wherein a is zero, R is methyl, R" is propylene, R"' and R"" are each methyl, R v is octadecyl and X is chloride.
Claim 8
Dependent Claim
31 words
A method as claimed in claim 2 wherein a is zero, R is methyl, R" is propylene, R"' is methyl, R"" and R v are each decyl and X is chloride.
Claim 9
Dependent Claim
35 words
A method as claimed in claim 2 wherein a is zero, R is methyl, R" is propylene, R"' and R"" are methyl, R v is --CH 2 C 6 H 5 and X is chloride.
Claim 10
Dependent Claim
35 words
A method as claimed in claim 2 wherein a is zero; R is methyl, R" is propylene, R"' and R"" are each methyl, R v is --CH 2 CH 2 OH and X is chloride.
Claim 11
Dependent Claim
30 words
A method as claimed in claim 2 wherein a is zero, R is ethyl, R" is propylene, R"' and R"" are methyl, R v is octadecyl and X is chloride.
Claim 12
Dependent Claim
30 words
A method as claimed in claim 2 wherein a is zero, R is ethyl, R" is propylene, R"' is methyl, R"" and R v are decyl and X is chloride.
Claim 13
Dependent Claim
33 words
A method as claimed in claim 2 wherein a is one, R is methyl, R' is methyl, R" is propylene, R"' and R"" are methyl, R v is octadecyl and X is chloride.
Claim 14
Dependent Claim
33 words
A method as claimed in claim 2 wherein a is one, R is ethyl, R' is methyl, R" is propylene, R"' and R"" are methyl, R v is octadecyl and X is chloride.
Claim 15
Dependent Claim
33 words
A method as claimed in claim 2 wherein a is one, R is methyl, R' is methyl, R" is propylene, R"' is methyl, R"" and R v are decyl and X is chloride.
Claim 16
Dependent Claim
33 words
A method as claimed in claim 2 wherein a is one, R is ethyl, R' is methyl, R" is propylene, R"' is methyl, R"" and R v are decyl and X is chloride.
Claim 17
Dependent Claim
33 words
A method as claimed in claim 2 wherein a is two, R is methyl, R' is methyl, R" is propylene, R"' and R"" are methyl, R v is octadecyl and X is chloride.
Claim 18
Dependent Claim
33 words
A method as claimed in claim 2 wherein a is two, R is ethyl, R' is methyl, R" is propylene, R"' and R"" are methyl, R v is octadecyl and X is chloride.
Claim 19
Dependent Claim
33 words
A method as claimed in claim 2 wherein a is two, R is ethyl, R' is methyl, R" is propylene, R"' is methyl, R"" and R v are decyl and X is chloride.
Claim 20
Dependent Claim
33 words
A method as claimed in claim 2 wherein a is two, R is methyl, R' is methyl, R" is propylene, R"' is methyl, R"" and R v are decyl and X is chloride.
Claim 21
Dependent Claim
33 words
A method as claimed in claim 2 wherein a is zero, R is ethyl, R" is propylene, R"' and R"" are methyl, R v is --(CH) x NHC(O)R vi and X is chloride.
Claim 22
Dependent Claim
25 words
A method as claimed in claim 20 wherein x has a value of 2 and R vi is --(CF 2 ) 6 CF 3 .
Claim 23
Dependent Claim
25 words
A method as claimed in claim 20 where x has a value of 3 and R vi is --(CF 2 ) 6 CF 3 .
Claim 24
Dependent Claim
67 words
A method as claimed in claim 1 wherein the organosilane has the formula ##STR6## wherein R is an alkyl radical of 1 to 4 carbon atoms or hydrogen; a has a value of 0, 1 or 2; R' is an alkyl radical of 1 to 4 carbon atoms; R" is an alkylene of 1 to 4 carbon atoms; X is chloride, bromide, fluoride, iodide, acetate or tosylate.
Claim 25
Dependent Claim
27 words
A method as claimed in claim 23 wherein a is zero, R is methyl, R" is propylene, X is chloride and bonded to a pyridinyl nitrogen atom.
Claim 26
Dependent Claim
27 words
A method as claimed in claim 23 wherein a is zero, R is ethyl, R" is propylene, X is chloride and bonded to a pyridinyl nitrogen atom.
Claim 27
Dependent Claim
27 words
A method as claimed in claim 23 wherein a is zero, R is hydrogen, R" is propylene, X is chloride and bonded to a pyridinyl nitrogen atom.
Claim 28
Dependent Claim
14 words
A method as claimed in claim 1 wherein the water is cooling tower water.
Claim 29
Dependent Claim
13 words
A method as claimed in claim 1 wherein the water is humidifier water.
Claim 30
Dependent Claim
16 words
A method as claimed in claim 1 wherein the water is in an engine cooling system.
Claim 31
Dependent Claim
15 words
A method as claimed in claim 1 wherein the water is in a hydraulic fluid.
Claim 32
Dependent Claim
13 words
A method as claimed in claim 1 wherein the water is geothermal water.
Claim 33
Dependent Claim
13 words
A method as claimed in claim 1 wherein the water is boiler water.
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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) | 1989-01-13 | 1989-07-15 | 1990-01-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-01-13 | 1993-07-15 | 1994-01-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-01-13 | 1997-07-15 | 1998-01-14 | $7700.00 | Window Closed / Lapsed |