Filter material and process for removing ozone from gases and liquids
First Claim
1. A process for removing ozone from gases which comprises the steps of:
- providing a filter material having repeating units of the formula
space="preserve" listing-type="equation">--[(Ar.sup.1).sub.n --X)].sub.m --[(Ar.sup.2).sub.i --Y)].sub.j --[(Ar.sup.3).sub.k --Z)].sub.l --[(Ar.sup.4).sub.o --W)].sub.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, as ozone removing compound, andbringing the gas into contact with the surface of the filter material.
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Accused Products
Abstract
A filter material based on a polyarylene thioether having repeating units of the formula
--[(Ar.sup.1).sub.n --X)].sub.m --[(Ar.sup.2).sub.i --Y)].sub.j
--[(Ar3)k --Z)]l --[(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.
38 Citations
7 Claims
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1. A process for removing ozone from gases which comprises the steps of:
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providing a filter material having repeating units of the formula
space="preserve" listing-type="equation">--[(Ar.sup.1).sub.n --X)].sub.m --[(Ar.sup.2).sub.i --Y)].sub.j --[(Ar.sup.3).sub.k --Z)].sub.l --[(Ar.sup.4).sub.o --W)].sub.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, as ozone removing compound, and bringing the gas into contact with the surface of the filter material. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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Specification
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- Resources
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Current AssigneeHoechst Aktiengesellschaft (Sanofi )
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Original AssigneeHoechst Aktiengesellschaft (Sanofi )
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InventorsStrutz, Heinz, Schleicher, Andreas, Fleischer, Dietrich, Kulpe, Jurgen
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Primary Examiner(s)SPITZER, ROBERT H
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Application NumberUS08/110,586Time in Patent Office659 DaysField of Search95/45, 95/46, 95/138, 95/274, 96/6, 96/108, 55/512, 55/522, 55/527, 55/528US Class Current95/273CPC Class CodesB01D 19/0031 by filtrationB01D 53/66 OzoneB01J 20/26 Synthetic macromolecular co...C08G 75/0204 PolyarylenethioethersY02A 50/20 Air quality improvement or ...
