Anion exchange method

Details Anion exchange method Anion exchange method

1992-08-28

1994-09-27

Zitomer, Fred

Liquid purification or separation

Processes

Ion exchange or selective sorption

521 25, 521 32, 521 30, 521 38, 525379, 210681, 210686, 376310, 376313, C02F 142, B01J 4104, B01J 4112

Patent

active

053505239

ABSTRACT:
An anion exchange method conducted at a high temperature, which comprises using a crosslinked anion exchanger which comprises structural units having a quaternary ammonium group of the following formula (a) and structural units derived from an unsaturated hydrocarbon group-containing crosslinkable monomer, and of which at least 90% of anion exchange groups are present in the form of a group represented by ##STR1## as defined in the following formula (a): ##STR2## wherein R is a --(CH.sub.2).sub.n --group (n=an integer of from 3 to 18) which may include a cyclic hydrocarbon, each of R.sub.1, R.sub.2 and R.sub.3 which are independent from one another, is a C.sub.1 -C.sub.8 hydrocarbon group or a C.sub.1 -C.sub.8 alkanol group, the benzene ring of the formula (a) may be substituted by an alkyl group or a halogen atom, or may be condensed with other aromatic ring, and X is an anion.

REFERENCES:
patent: 2591573 (1947-07-01), McBurney
patent: 2591574 (1947-07-01), McBurney
patent: 2860097 (1958-11-01), Juda et al.
patent: 3843566 (1974-10-01), Barrett
patent: 4448899 (1984-05-01), Hass
patent: 4880595 (1989-11-01), Matsuda
European Search Report.

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