Liquid purification or separation – With alarm – indicator – register – recorder – signal or... – Responsive to fluid flow
Patent
1975-12-09
1977-03-08
Hart, Charles N.
Liquid purification or separation
With alarm, indicator, register, recorder, signal or...
Responsive to fluid flow
162 29, B01D 1500
Patent
active
040111601
ABSTRACT:
Novel polymers are described herein which are particularly useful in removing phenolics from waste streams. The polymers are prepared by reacting an oxazoline or oxazine (preferably 2-methyl or ethyl-2-oxazoline) with a cross-linked vinylaromatic polymer bearing pendant halomethyl groups on the aromatic rings. Macroporous beads prepared by reacting cross-linked chloromethylated polystyrene with 2-methyl and/or 2-ethyl-2-oxazoline are particularly useful embodiments in removing phenolics from aqueous waste streams and are used to remove phenolics (e.g. tannins) and other color-bodies from bleached Kraft pulp effluent.
REFERENCES:
patent: 3597351 (1971-08-01), Landenburg et al.
patent: 3652407 (1972-03-01), Paleos
Chamberlin Thomas A.
Madison Norman L.
Cintins Ivars
Hart Charles N.
The Dow Chemical Company
White L. Wayne
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