B - Operations – Transporting – 01 – J
Patent
B - Operations, Transporting
01
J
B01J 13/00 (2006.01) B01D 17/038 (2006.01) C08F 6/20 (2006.01) C08J 3/09 (2006.01)
Patent
CA 2111296
TITLE OF THE INVENTION "PROCESS FOR PREPARING NOVEL HIGH SOLIDS NON-AQUEOUS POLYMER COMPOSITIONS" ABSTRACT OF THE DISCLOSURE The use of falling-film-evaporation and a concentration means such as centrifugal separation to dehydrate and concentrate a water-in-oil polymer emulsion or suspension is disclosed. In a preferred embodiment, a water-in-oil polymer composition containing less than about 25% active polymer solids is dehydrated in falling-film evaporator to produce an evaporator concentrate containing less than about 5.0% water. The evaporator concentrate then flows to a separation device such as a centrifuge, wherein oil is removed to produce a composition that is substantially a polymer and emulsifying surfactant-in-oil composition containing in excess of about 60 weight % polymer solids. The centrifuge raffinate may optionally be treated in a second separation means to capture additional polymer solids, with optional recycle of the oil-rich raffinate. The concentrated polymer composition is preferably stabilized with a steric stabilizer to produce a free flowing liquid product.
Frederick Kevin W.
Hunter Wood E.
Loeffler Randy J.
Calgon Corporation
Goudreau Gage Dubuc
LandOfFree
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