Liquid purification or separation – Processes – Making an insoluble substance or accreting suspended...
Patent
1991-07-31
1993-06-01
Hruskoci, Peter
Liquid purification or separation
Processes
Making an insoluble substance or accreting suspended...
55 85, 134 38, 210728, 210734, 210930, 252181, C02F 156
Patent
active
052156680
ABSTRACT:
Oversprayed paint in a paint spray operation is detackified by dosing the water of the waste water system of such operation with a composition comprising an amphoteric polymer and aluminum salts. The amphoteric polymer contains at least about 10 mole percent of cationic mer units of monoethylenically unsaturated monomer and at least 1 mole percent of anionic mer units. The aluminum salt preferred is aluminum sulfate, or its hydrates, for example alum. The amphoteric polymers preferably contain DMAEM, DMAEM.multidot.H.sub.2 SO.sub.4, DMAEM.multidot.MCQ, or mixtures thereof, with acrylic acid, methacrylic acid, AMPS, or mixtures thereof. The amphoteric polymers may also contain neutral monomers such as (meth)acrylamide.
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Bhattacharyya, deceased Bhupati R.
Bui Nang T.
Dunn Yvonne O.
Huang Shu-Jen W.
Shetty Chandrashekar S.
Drake James J.
Hruskoci Peter
Miller Robert A.
Nalco Chemical Company
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