Process for removing residual monomers and oligemers from amine-

Details Process for removing residual monomers and oligemers from amine- Process for removing residual monomers and oligemers from amine-

1991-04-05

1991-10-08

Spear, Frank

Liquid purification or separation

Processes

Liquid/liquid solvent or colloidal extraction or diffusing...

210651, 210259, B01D 6116

Patent

active

050551973

ABSTRACT:
Treatment of water-soluble, amine-containing polymers with strong acid, cation exchange resins from aromatic copolymer crosslinked with 2-25% polyvinyl crosslinker, followed by ultrafiltration with a membrane filter having a molecular-weight cutoff, measured against the polymers to be treated, of about 10,000 to about 15,000, results in a highly effective removal of residual monomers and oligomers of less than 500 molecular weight.

REFERENCES:
patent: 4624762 (1986-11-01), Abbey et al.

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