Process for the chloromethylation of styrene-divinylbenzene copo

Details Process for the chloromethylation of styrene-divinylbenzene copo Process for the chloromethylation of styrene-divinylbenzene copo

1974-11-27

1976-12-14

Hamrock, William F.

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

Polymers from only ethylenic monomers or processes of...

526 19, 526 55, 260 67A, C08F 824

Patent

active

039977064

ABSTRACT:
There is disclosed a process for chloromethylating styrene-divinylbenzene copolymers by treating the copolymers with methylal and thionyl chloride in a molar ratio not exceeding 2:1 and in the presence of a catalyst of the Friedel-Crafts type or which consists of an acid.
As is known, the chloromethylation of cross-linked aromatic polymers of the styrene-divinylbenzene type is an important stage in the preparation of anionic exchange resins.

REFERENCES:
patent: 3297648 (1967-01-01), Corte et al.
patent: 3311602 (1967-03-01), Raley
patent: 3417066 (1968-12-01), Corte et al.
patent: 3425990 (1969-02-01), Corte et al.
patent: 3812061 (1974-05-01), Barrett

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