Patent US4786434A successfully refreshed from Google Patents.
US4786434A
Expired / Lapsed
US
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Agent for the elimination of active chlorine compounds from water
Assignee: Tetra Werke Dr Rer Nat Ulrich Baensch GmbH
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Filing: 1988-02-08
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Granted: 1988-11-22
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Expires: 2008-02-08
Abstract
Abstract An agent for and the method for its use in the elimination of active chlorine compounds from water comprises a hydroxysulfinate adduct of an aliphatic, aromatic, or heterocyclic mono- or dialdehyde or an ammonia adduct thereof. The agent is used alone or in combination with the corresponding aldehyde.
Inventors
- 👤 Ritter Gunter
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 17:13
CPC Classifications
C; C02; C02F; C02F1/00; C02F1/70; C02F2303/00; C02F2303/18; C02F2303/185
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
90 words
A composition for use in treating water to remove active chlorine compounds selected from (a) a mixture comprising an adduct of hydrogen sulfoxylate anions to an aliphatic, aromatic, or heterocyclic mono- or dialdehyde according to the equation: R--CH═O+Me.sup.n+ (HSO.sub.2.sup.-).sub.n →Me.sup.n+ (RCH(OH)SO.sub.2.sup.-).sub.n wherein Me + is hydrogen ion or a mono-, di- or trivalent metal cation, and the corresponding amino-, imino-, or nitrilosulfinate formed as a product of said adduct with ammonia; (b) a mixture comprising said adduct, and the corresponding parent aldehyde; (c) a mixture comprising said adduct, and ammonia.
Claim 2
Dependent Claim
90 words
A composition for use in treating water to remove active chlorine compounds selected from (a) a mixture comprising an adduct of hydrogen sulfoxylate anions to an aliphatic, aromatic, or heterocyclic mono- or dialdehyde according to the equation: R--CH═O+Me.sup.n+ (HSO.sub.2.sup.-).sub.n →Me.sup.n+ (RCH(OH)SO.sub.2.sup.-).sub.n wherein Me + is hydrogen ion or a mono-, di- or trivalent metal cation, and the corresponding amino-, imino-, or nitrilosulfinate formed as a product of said adduct with ammonia; (b) a mixture comprising said adduct, and the corresponding parent aldehyde; (c) a mixture comprising said adduct, and ammonia.
Claim 3
Dependent Claim
63 words
A composition for use in treating water as defined in claim 1 wherein said adduct is the product of the reaction of hydrogen sulfoxylate anion with a straight or branched alipahtic mono- or dialdehyde of from one to five carbon atoms, furfuryl aldehyde, benzaldehyde, or salicaldehyde, and cations selected from hydrogen ion, sodium ion, potassium ion, magnesium ion, calcium ion, or aluminum ion.
Claim 4
Dependent Claim
36 words
A composition for use in treating water as defined in claim 2 wherein said adduct contains one or more anions from the group consisting of hydroxymethylsulfinate, aminomethylsulfinate, imino-di(methylsulfinate) or nitrilo-tri(methylsulfinate) and, as cation, hydrogen or sodium.
Claim 5
Dependent Claim
42 words
A composition for use in treating water as defined in claim 2 wherein said adduct contains one or more anions from the group consisting of hydroxymethylsulfinate, aminomethylsulfinate, imino-di(methylsulfinate) or nitrilo-tri(methylsulfinate) and, as cation, hydrogen or sodium; alone or in combination with formaldehyde.
Claim 6
Dependent Claim
42 words
A composition for use in treating water as defined in claim 2 wherein said adduct contains one or more anions from the group consisting of hydroxymethylsulfinate, aminomethylsulfinate, imino-di(methylsulfinate) or nitrilo-tri(methylsulfinate) and, as cation, hydrogen or sodium; alone or in combination with ammonia.
Claim 7
Dependent Claim
15 words
A composition for use in treating water as defined in claim 1 containing sodium hydroxymethylsulfinate.
Claim 8
Dependent Claim
29 words
A composition for use in treating water as defined in claim 4 containing sodium hydroxymethylsulfinate and formaldehyde in aqueous solution in a molar ration of from 1:1 to 1:3.
Claim 9
Dependent Claim
29 words
A composition for use in treating water as defined in claim 5 containing sodium hydroxymethylsulfinate and ammonia in aqueous solution in a molar ration of from 1:1 to 1:3.
References Cited (Backward Citations)
US2597281A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1991-11-22 | 1992-05-23 | 1992-11-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-11-22 | 1996-05-23 | 1996-11-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-11-22 | 2000-05-23 | 2000-11-22 | $7700.00 | Window Closed / Lapsed |