Patent US5593594A successfully refreshed from Google Patents.
US5593594A
Expired / Lapsed
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Ter material and process for removing ozone from gases and liquids
Assignee: Hoechst AG
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Filing: 1995-03-02
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Granted: 1997-01-14
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Expires: 2015-03-02
Abstract
Abstract A filter material based on a polyarylene thioether having repeating units of the formula -[(Ar1)n-X)]m-[(Ar2)i-Y)]j-[(Ar3)k-Z)]1-[(Ar4)o-W)]p-(I) in which Ar1, Ar2, Ar3, Ar4, W, X, Y and Z, independently of each other, are identical or different, the indices n, m, i, j, k, l, o and p, independently of each other, are zero or integers 1, 2, 3 or 4, their sum being at least 2, Ar1, Ar2, Ar3 and Ar4 are arylene systems having 6 to 18 carbon atoms, and W, X, Y and Z are divalent linking groups, selected from -SO2-, -S-, -SO-, -CO-, -O-, -CO2-, or alkylene groups or alkylidene groups having 1 to 6 carbon atoms is suitable for removing ozone from gases or liquids. The removal proceeds quantitatively, no volatile products being formed.
Inventors
- 👤 Heinz Strutz
- 👤 Dietrich Fleischer
- 👤 J urgen Kulpe
- 👤 Andreas Schleicher
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 16:09
CPC Classifications
B; B01; B01J; B01J20/00; B01J20/22; B01J20/26; B01D; B01D15/00; B01D19/00; B01D19/0031; B01D53/00; B01D53/34; B01D53/46; B01D53/66; C; C08; C08G; C08G75/00; C08G75/02; C08G75/0204; Y; Y02; Y02A; Y02A50/00; Y02A50/20
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
159 words
A process for removing ozone from liquids which comprises the steps of: providing a filter material having repeating units of the formula --[Ar.sup.1).sub.n --X)].sub.m --[(Ar.sup.2).sub.i --Y)].sub.j --[(Ar.sup.3).sub.k --Z)].sub.1 --[Ar.sup.4).sub.o --W)].sub.p --(I) in which Ar 1 , Ar 2 , Ar 3 , Ar 4 , W, X, Y and Z, independently of each other, are identical or different, the indices n, m, i, j, k, l, o and p, independently of each other, are zero or integers 1, 2, 3 or 4, their sum being at least 2, Ar 1 , Ar 2 , Ar 3 and Ar 4 are arylene systems having 6 to 18 carbon atoms, and W, X, Y and Z are divalent linking groups, selected from --SO 2 --, --S--, --SO--, --CO--, --O--, --CO 2 --, or alkylene groups or alkylidene groups having 1 to 6 carbon atoms, as ozone removing compound, and bringing the liquid into contact with the surface of the filter material.
Claim 2
Dependent Claim
159 words
A process for removing ozone from liquids which comprises the steps of: providing a filter material having repeating units of the formula --[Ar.sup.1).sub.n --X)].sub.m --[(Ar.sup.2).sub.i --Y)].sub.j --[(Ar.sup.3).sub.k --Z)].sub.1 --[Ar.sup.4).sub.o --W)].sub.p --(I) in which Ar 1 , Ar 2 , Ar 3 , Ar 4 , W, X, Y and Z, independently of each other, are identical or different, the indices n, m, i, j, k, l, o and p, independently of each other, are zero or integers 1, 2, 3 or 4, their sum being at least 2, Ar 1 , Ar 2 , Ar 3 and Ar 4 are arylene systems having 6 to 18 carbon atoms, and W, X, Y and Z are divalent linking groups, selected from --SO 2 --, --S--, --SO--, --CO--, --O--, --CO 2 --, or alkylene groups or alkylidene groups having 1 to 6 carbon atoms, as ozone removing compound, and bringing the liquid into contact with the surface of the filter material.
Claim 3
Dependent Claim
20 words
The process as claimed in claim 1, wherein the poly(phenylene sulfide) having repeating units of the formula ##STR2## is used.
Claim 4
Dependent Claim
16 words
The process as claimed in claim 1, wherein the mean molecular weight is 4,000 to 200,000.
Claim 5
Dependent Claim
16 words
The process as claimed in claim 1, wherein the treatment temperature is -10° to +80° C.
Claim 6
Dependent Claim
16 words
The process as claimed in claim 1, wherein the treatment temperature is 0° to 50° C.
Claim 7
Dependent Claim
17 words
The process as claimed in claim 1, wherein the treatment time is 0.1 second to 10 minutes.
Claim 8
Dependent Claim
17 words
The process as claimed in claim 1, wherein the treatment time is 0.5 second to 1 minute.
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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) | 2000-01-14 | 2000-07-15 | 2001-01-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2004-01-14 | 2004-07-15 | 2005-01-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2008-01-14 | 2008-07-15 | 2009-01-14 | $7700.00 | Window Closed / Lapsed |