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Amino sulphonic resins for chlorine exchange
Author(s) -
Wayman Morris,
Cheung Leon K. L.
Publication year - 1973
Publication title -
the canadian journal of chemical engineering
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.404
H-Index - 67
eISSN - 1939-019X
pISSN - 0008-4034
DOI - 10.1002/cjce.5450510509
Subject(s) - chemistry , chlorine , urea , ion exchange resin , nuclear chemistry , organic chemistry , polymer chemistry
The introduction of sulphonic groups to urea melamineformaldehyde resins has been shown to improve their performance as chlorine exchange resins for treatment of drinking and swimming pool waters. The preparation of resins containing a range of sulphonic content (UMFS resins) is described. Suspension polymerization produced resin beads suitable for use in fluidized beds. Scanning electron microscopy showed the resin structure to be macroreticular, porosity increasing with the sulphonic content in the formulation. Chlorination of water by fluidized beds of such resins showed that the activity increased with sulphonic content, steady state residual chlorine levels of 2 to 4 ppm being obtained with 0.5 or 1 mole sulphonic group per mole urea in the formulation.