发明名称 |
PROCESS FOR PREPARING NOVEL HIGH SOLIDS NON-AQUEOUS POLYMER COMPOSITIONS |
摘要 |
TITLE OF THE INVENTION "PROCESS FOR PREPARING NOVEL HIGH SOLIDS NON-AQUEOUS POLYMER COMPOSITIONS" 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.
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申请公布号 |
CA2111293(A1) |
申请公布日期 |
1994.06.22 |
申请号 |
CA19932111293 |
申请日期 |
1993.12.13 |
申请人 |
CALGON CORPORATION |
发明人 |
HUNTER, WOOD E.;FREDERICK, KEVIN W.;LOEFFLER, RANDY J. |
分类号 |
C08J3/00;C08F6/20;C08J3/09;(IPC1-7):B01J13/00;B01D1/22;B01D17/038 |
主分类号 |
C08J3/00 |
代理机构 |
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主权项 |
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地址 |
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