Process for sulfonating polymers

Details Process for sulfonating polymers Process for sulfonating polymers

C - Chemistry, Metallurgy

08

F

402/325

C08F 8/36 (2006.01) C08F 210/12 (2006.01) C08F 210/18 (2006.01)

Patent

CA 1041697

ABSTRACT OF THE DISCLOSURE A process for sulfonating polymers which are prepared by solution polymerization using a Friedel-Crafts or Ziegler-type catalyst is disclosed. The reactor effluent containing polymer, unreacted light monomers, diluent- solvent and active catalyst is first treated to remove substantially all unreacted light monomer, e.g. by flashing. The effluent is then treated with a sulfonating agent (e.g. acetyl sulfate), which simultaneously deactivates catalyst. Thereafter, the sulfonated polymer is neutralized, e.g. by exposure to metal salts, organic amines, etc., and subjected to normal finishing operations, e.g. deashing, steam stripping, stabilizing and drying.

221347

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