发明名称 |
SLUDGE DEHYDRATING AGENT |
摘要 |
A novel process for producing an acrylic polymer serving as a sludge dehydrating agent, which polymer contains tertiary amino group which are neither quaternized nor converted into corresponding salts and has a high molecular weight, which process comprises preparing an acrylic monomer containing a tertiary ammonium carbonate group by the reaction of an aqueous solution of an acrylic monomer containing a tertiary amino group with carbon dioxide, polymerizing the obtained monomer alone or copolymerizing the monomer with another copolymerizable vinyl monomer to prepare a polymer containing tertiary ammonium carbonate units, and decarbonating the polymer by heating and/or evacuating. Among others, especially an acrylic polymer containing at least 5 mol% of the tertiary amino group units and comprising a water-soluble vinyl polymer having the intrinsic viscosity [ eta ] of 1 dl/g or above is useful as an excellent sludge dehydrating agent. |
申请公布号 |
WO9500559(A1) |
申请公布日期 |
1995.01.05 |
申请号 |
WO1993JP00850 |
申请日期 |
1993.06.23 |
申请人 |
KOHJIN CO., LTD.;NAGAMOTO, AKIYOSHI;IMAMURA, KOUICHI;OKA, HIROSHI |
发明人 |
NAGAMOTO, AKIYOSHI;IMAMURA, KOUICHI;OKA, HIROSHI |
分类号 |
C08F20/34;B01D21/01;C02F11/14;C08F2/16;C08F8/00;C08F20/52;C08F20/60;(IPC1-7):C08F8/00 |
主分类号 |
C08F20/34 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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