Anti-clumping of ion exchange resins

Details Anti-clumping of ion exchange resins Anti-clumping of ion exchange resins

1980-09-08

1982-08-31

Hamrock, William F.

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

Synthetic resins

Ion-exchange polymer or process of preparing

521 30, B01J 3918, B01J 4112

Patent

active

043473288

ABSTRACT:
The agglomeration or clumping of the resins in a resin bed comprising a mixture of anion and cation exchange resins is effectively reduced by treating the anion or cation resin with an aqueous dispersion of water-insoluble polymer particles having a particle size of from about 100 to about 800 A and bearing a moiety having opposite ionic character than the resin being treated. For example, the surface charge exhibited by a strong base anion exchange resin bearing pendant quaternary ammonium groups is reduced by contacting the resin with a colloidal aqueous dispersion of a water-insoluble polymer of a monovinylidene aromatic such as styrene and a small amount of a polyvinylidene aromatic such as divinylbenzene which polymer bears pendant sulfonate groups. The thus treated anion exchange resin can subsequently be mixed with a cation exchange resin to form a mixed resin bed having reduced clumping of resins without coincident decrease in efficiency.

REFERENCES:
patent: 2961417 (1960-11-01), Small
patent: 4101460 (1978-07-01), Small et al.
patent: 4119580 (1978-10-01), Smith, Jr. et al.
Rohm & Haas Co., Feb. 1967, "Declumping of Anion and Cation Exchange Resins".

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