Liquid purification or separation – Processes – Making an insoluble substance or accreting suspended...
Patent
1991-12-05
1993-02-09
Silverman, Stanley S.
Liquid purification or separation
Processes
Making an insoluble substance or accreting suspended...
252180, 525 61, 525154, 5253282, C02F 156
Patent
active
051850834
ABSTRACT:
Polyvinylaminals, optionally as the formed copolymer with polyvinylhemiaminals and polyvinylacetals are useful as separating agents and are provided by reacting a poly(vinylamine) or a copolymer containing vinyl alcohol and vinylamine units with a monoaldehyde. The aldehyde, such as butyraldehyde, can be introduced into the polymer aminalization as a liquid or gas, generally in a proportion of about 0.02 to 0.5 mol per mol of alcohol and amine units in the polymer chain. These polymers, especially as the cationic salt, perform very well in the flocculation, settling, clarification and dewatering of wastewater.
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McAndrew Thomas P.
Nordquist Andrew F.
Pinschmidt, Jr. Robert K.
Smigo John G.
Air Products and Chemicals Inc.
Marsh William F.
McCarthy Neil M.
Rodgers Mark L.
Silverman Stanley S.
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