US4435303A
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US
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Descaling composition
Assignee: MUELLER-ABADI MARIANNE
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Filing: 1983-01-03
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Granted: 1984-03-06
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Expires: 2003-01-03
Abstract
Abstract The present invention is directed to a composition which includes an anionic fatty alcohol metal sulfate surfactant, a nonionic substituted poly (ethylene oxide) surfactant, an ethanolamine, zinc and hydroxyacetic acid. A method for removing scale from a surface is taught.
Inventors
- 👤 Khodabandeh Abadi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 02:30
CPC Classifications
C; C02; C02F; C02F5/00; C02F5/08; C02F5/10; C02F5/12; C02F5/125
Claims Analysis
Total Claims: 35
Claim 1
Independent Claim
93 words
A composition comprising (a) an anionic fatty alcohol metal sulfate surfactant; (b) a nonionic, substituted poly(ethylene oxide) surfactant; (c) an ethanol amine of the formula MR.sub.3-x (CH.sub.2 CH.sub.2 OH).sub.x ; wherein R is hydrogen or an alkyl group of 1-4 carbon atoms and x is an integer of from 1 to 3; (d) zinc; (e) hydroxyacetic acid; wherein the ratio by weight of (d) to (a)+(b) is between about 9:1 and 10:1, the ratio by weight of (a):(b):(c) is about 1:1:1 and the ratio by weight of (e) to (a)+(b)+(c) is about 1:2.
Claim 2
Dependent Claim
93 words
A composition comprising (a) an anionic fatty alcohol metal sulfate surfactant; (b) a nonionic, substituted poly(ethylene oxide) surfactant; (c) an ethanol amine of the formula MR.sub.3-x (CH.sub.2 CH.sub.2 OH).sub.x ; wherein R is hydrogen or an alkyl group of 1-4 carbon atoms and x is an integer of from 1 to 3; (d) zinc; (e) hydroxyacetic acid; wherein the ratio by weight of (d) to (a)+(b) is between about 9:1 and 10:1, the ratio by weight of (a):(b):(c) is about 1:1:1 and the ratio by weight of (e) to (a)+(b)+(c) is about 1:2.
Claim 3
Dependent Claim
16 words
A composition in accordance with claim 1 wherein the metal of (a) is an alkali metal.
Claim 4
Dependent Claim
12 words
A composition in accordance with claim 2 wherein the metal is sodium.
Claim 5
Dependent Claim
20 words
A composition in accordance with claim 1 wherein the fatty alcohol of (a) has about 10 to 14 carbon atoms.
Claim 6
Dependent Claim
16 words
A composition in accordance with claim 4 wherein the fatty alcohol has about 12 carbon atoms.
Claim 7
Dependent Claim
45 words
A composition in accordance with claim 1 wherein the nonionic surfactant of (b) is a compound of the formula ##STR2## wherein R 1 is an alkyl group of about 8 to 10 carbon atoms and y is an integer of from about 1 to 70.
Claim 8
Dependent Claim
13 words
A composition in accordance with claim 6 wherein y is 9 or 10.
Claim 9
Dependent Claim
48 words
A composition in accordance with claim 1 wherein the nonionic surfactant of (b) is a compound of the formula R.sub.2 (OCH.sub.2 CH.sub.2).sub.z --OH; wherein R 2 is an alkyl group having about 11 to 15 carbon atoms and z is an integer of between about 3 and 40.
Claim 10
Dependent Claim
14 words
A composition in accordance with claim 8 wherein z is between 9 and 10.
Claim 11
Dependent Claim
11 words
A composition in accordance with claim 1 wherein x is 3.
Claim 12
Dependent Claim
83 words
A composition in accordance with claim 1 wherein (a) is sodium lauryl sulfate; (b) is a compound of the formula ##STR3## wherein R 1 is alkyl having 8 to 10 carbon atoms and y is 9 or 10, or a compound of the formula R.sub.2 (OCH.sub.2 CH.sub.2).sub.y --OH; wherein R 2 is an alkyl group having from about 11 to 15 carbon atoms and z is an integer of from about 9 to 10; and (c) is an ehtanolamine, wherein x is 3.
Claim 13
Dependent Claim
11 words
A composition in accordance with claim 1 additionally comprising a thickener.
Claim 14
Dependent Claim
13 words
A composition in accordance with claim 12 wherein the thickener is xanthan gum.
Claim 15
Dependent Claim
10 words
A composition in accordance with claim 1 additionally comprising water.
Claim 16
Dependent Claim
26 words
A composition in accordance with claim 14 wherein the amount of water present produces an about 4.5 weight to volume percent mixture of (a)+(b)+(c)+(d) to water.
Claim 17
Dependent Claim
81 words
A composition in accordance with claim 15 wherein (a) is sodium lauryl sulfate; (b) is a compound of the formula ##STR4## wherein R 1 is alkyl having 9 or 10 carbon atoms and y is 9 or 10, or a compound of the formula R.sub.2 (OCH.sub.2 CH.sub.2).sub.z OH; wherein R 2 is an alkyl group having about 11 to 15 carbon atoms and z is an integer of from about 9 to 10; and (c) is ethanolamine wherein x is 3.
Claim 18
Dependent Claim
10 words
A composition according to claim 16 additionally comprising a thickener.
Claim 19
Dependent Claim
13 words
A composition in accordance with claim 17 wherein the thickener is xanthan gum.
Claim 20
Dependent Claim
23 words
A method for removing scale from a surface comprising contacting the it a scale removing effective amount of the composition of claim 1.
Claim 21
Dependent Claim
83 words
A method in accordance which claim 19 wherein (a) is sodium lauryl sulfate; (b) is a compound of the formula ##STR5## wherein R 1 is alkyl having 8 to 10 carbon atoms and y is 9 or 10, or a compound of the formula R.sub.2 (OCH.sub.2 CH.sub.2).sub.z OH; wherein R 2 is an alkyl group having from about 11 to 15 carbon atoms and z is an integer of from about 9 to 10; and (c) is an ethanolamine wherein x is 3.
Claim 22
Dependent Claim
33 words
A method in accordance with claim 20 wherein the composition additionally comprises an amount of water present so as to produce an about 4.5 weight to volume percent mixture of (a)+(b)+(c)+(d) to water.
Claim 23
Dependent Claim
12 words
A descaling composition comprising a dilutent and the composition of claim 1.
Claim 24
Dependent Claim
13 words
A descaling composition in accordance with claim 22 wherein the dilutent is water.
Claim 25
Dependent Claim
25 words
A descaling composition in accordance with claim 23 wherein the weight-to-volume percent of the composition of claim 1 to water is about 8 to 50.
Claim 26
Dependent Claim
15 words
A descaling composition in accordance with claim 24 wherein the percent is 10 to 25.
Claim 27
Dependent Claim
84 words
A descaling composition in accordance with claim 25 wherein (a) is sodium lauryl sulfate; (b) is a compound of the formula ##STR6## wherein R 1 is alkyl having 8 to 10 carbon atoms and y is 9 or 10, or a compound of the formula R.sub.2 (OCH.sub.2 CH.sub.2).sub.z OH; wherein R 2 is an alkyl group having from about 11 to 15 carbon atoms and z is an integer of from about 9 to 10; and (c) is an ethanolamine wherein x is 3.
Claim 28
Dependent Claim
12 words
A descaling composition in accordance with claim 26 additionally comprising a thickener.
Claim 29
Dependent Claim
14 words
A descaling composition in accordance with claim 27 wherein th thickener is xanthan gum.
Claim 30
Independent Claim
125 words
A method for perparing a descaling composition comprising the steps of: (a) mixing a nonionic, substituted-polyethylene oxide surfactant with a mixture of zinc and an anionic fatty alcohol metal sulfate surfactant; (b) adding an ethanolamine of the formula NR.sub.3-x (CH.sub.2 CH.sub.2 OH).sub.x ; wherein R is hydrogen or an alkyl group of 1-4 carbon atoms and x is an integer of 1-3; and (c) adding hydroyacetic acid; wherein the ratio by weight of zinc to the nonionic surfactant plus the anionic surfactant is between about 9:1 and 10:1, the ratio by weight of the nonionic surfactant to the ethanolamine is about 1:1:1, and the ratio by weight of hydroxyacetic acid to the nonionic surfactant plus the anionic surfactant plus the ethanol amine is about 1:2.
Claim 31
Independent Claim
125 words
A method for perparing a descaling composition comprising the steps of: (a) mixing a nonionic, substituted-polyethylene oxide surfactant with a mixture of zinc and an anionic fatty alcohol metal sulfate surfactant; (b) adding an ethanolamine of the formula NR.sub.3-x (CH.sub.2 CH.sub.2 OH).sub.x ; wherein R is hydrogen or an alkyl group of 1-4 carbon atoms and x is an integer of 1-3; and (c) adding hydroyacetic acid; wherein the ratio by weight of zinc to the nonionic surfactant plus the anionic surfactant is between about 9:1 and 10:1, the ratio by weight of the nonionic surfactant to the ethanolamine is about 1:1:1, and the ratio by weight of hydroxyacetic acid to the nonionic surfactant plus the anionic surfactant plus the ethanol amine is about 1:2.
Claim 32
Dependent Claim
19 words
A method in accordance with claim 29 comprising the additional step of (d) diluting the composition with a dilutent.
Claim 33
Dependent Claim
19 words
A method in accordance with claim 30 wherein step (d) is performed after step (b) and before step (c).
Claim 34
Dependent Claim
12 words
A method in accordance with claim 30 wherein the dilutent is water.
Claim 35
Dependent Claim
15 words
A method in accordance with claim 30 comprising the additional step of adding a thickener.
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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) | 1987-03-06 | 1987-09-05 | 1988-03-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-03-06 | 1991-09-05 | 1992-03-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-03-06 | 1995-09-05 | 1996-03-06 | $7700.00 | Window Closed / Lapsed |