High density ion exchange resins from haloalkylated aromatic pol

Details High density ion exchange resins from haloalkylated aromatic pol High density ion exchange resins from haloalkylated aromatic pol

1978-11-06

1982-03-23

Henderson, C. A.

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

Synthetic resins

Ion-exchange polymer or process of preparing

423 7, 426271, 521 31, 525357, 525378, 525379, C08F 832, C08F 830, C08F 822, C08F 820

Patent

active

043213316

ABSTRACT:
High density ion exchange resins are prepared from cross-linked, haloalkylated monovinylidene aromatic polymers which have been halogenated in the presence of a Friedel-Crafts catalyst. For example, a cross-linked chloromethylated polystyrene brominated in the presence of ferric chloride (FeCl.sub.3) may be subsequently aminated to form a high density anion exchange resin useful in thick process slurries such as those employed in uranium recovery.

REFERENCES:
patent: 3812061 (1974-05-01), Barrett
patent: 3899472 (1975-08-01), Aya et al.
Dow Chemical Co. Internal Communication-R. M. Wheaton-Jun. 18, 1948.
Chem. Abstracts, vol. 61, entry 2027-Wintersberg 1964.
Chem. Abstracts, vol. 78, 1973, entry 148658b, Ito et al.

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