Ion exchange material prepared from partially pyrolyzed macropor

Details Ion exchange material prepared from partially pyrolyzed macropor Ion exchange material prepared from partially pyrolyzed macropor

1979-12-26

1981-05-05

Cintins, Ivars C.

Liquid purification or separation

Processes

Ion exchange or selective sorption

55 74, 252436, 252438, 252439, 423 6, B01J 3924, B01J 4118

Patent

active

042657687

ABSTRACT:
Macroporous styrene polymer particles which have been partially pyrolyzed at temperatures between 300.degree. and 800.degree. C. to form non-functionalized, carbonaceous adsorbents, are functionalized according to this invention to produce weak base, strong base, weak acid or strong acid, dense ion exchange particles, or precursors thereof, using such reactions as halogenation, sulfonation, chloromethylation, chlorosulfonation and oxidation, alone or followed by aminolysis or other conventional functionalization reactions.

REFERENCES:
patent: 2260971 (1941-10-01), Goetz
patent: 2671059 (1954-03-01), Smit
patent: 2932552 (1960-04-01), Weiss et al.
patent: 4040990 (1977-08-01), Neely
patent: 4081512 (1978-03-01), Yang et al.

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