Liquid purification or separation – Processes – Ion exchange or selective sorption
Patent
1998-05-14
2000-09-26
Higel, Floyd D.
Liquid purification or separation
Processes
Ion exchange or selective sorption
210638, 210669, 210670, 210672, 210681, 210683, 210684, 210685, 210688, B01J 3900, B01J 4900, B01J 4702, C02F 142, B01D 1504
Patent
active
061238503
ABSTRACT:
The subject matter of the present invention is a process for the purification of a virtually anhydrous organic liquid other than DMSO alone, in order to decrease its content of alkali and alkaline-earth metal and metal cations, characterized in that it consists essentially in placing this organic liquid in contact with one or more cation exchange resins and in then separating from the resin(s) the purified organic liquid, said resin or at least one of said resins being a sulphonic resin in --SO.sub.3 H or --SO.sub.3 NH.sub.4 form based on a polystyrene-divinylbenzene copolymer having a divinylbenzene content of from 50 to 60% by weight, without taking the sulphonic groups into account.
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Commarieu Annie
Humblot Francis
ELF Atochem
Higel Floyd D.
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