Title:
POLYMER FLOCCULATING AGENT AND METHOD FOR PRODUCING SAME
Document Type and Number:
WIPO Patent Application WO/2011/154991
Kind Code:
A1
Abstract:
Provided is a polymer flocculating agent. When dissolved in water, said polymer flocculating agent shows a high dissolution rate and has a small content of water-insoluble matters and, therefore, can improve the flocculation performance. When used in treating sludge or wastewater, said polymer flocculating agent forms solid and large flocs, the thus formed flocs being hardly broken or re-dispersed, and therefore can highly improve the stability of the flocculation treatment and the treatment speed. Even at a low addition level, said polymer flocculating agent enables the flocculation treatment and, after dehydrating the sludge, gives a cake with a low water content, which makes it possible to reduce the amount of waste matters and incineration cost. The polymer flocculating agent comprises dry particles of a water-soluble (co)polymer (A) obtained by a reverse phase suspension polymerization process, which comprises dropping an aqueous monomer solution, said aqueous monomer solution containing a water-soluble unsaturated monomer (a) and a polymerization initiator (d), into a liquid mixture of a hydrophobic dispersion medium (b) with a dispersing agent (c), and said particles comprise secondary particles formed by agglomerated single particles (primary particles).
Inventors:
NAKADA, Shigekuni (11-1, Ikkyo Nomoto-cho, Higashiyama-ku, Kyoto-sh, Kyoto 95, 〒6050995, JP)
中田繁邦 (〒95 京都府京都市東山区一橋野本町１１番地の１三洋化成工業株式会社内 Kyoto, 〒6050995, JP)
中田繁邦 (〒95 京都府京都市東山区一橋野本町１１番地の１三洋化成工業株式会社内 Kyoto, 〒6050995, JP)
Application Number:
JP2010/003798
Publication Date:
December 15, 2011
Filing Date:
June 08, 2010
Export Citation:
Assignee:
SANYO CHEMICAL INDUSTRIES, LTD. (11-1, Ikkyo Nomoto-cho Higashiyama-ku, kyoto-sh, Kyoto 95, 〒6050995, JP)
三洋化成工業株式会社 (〒95 京都府京都市東山区一橋野本町１１番地の１ Kyoto, 〒6050995, JP)
NAKADA, Shigekuni (11-1, Ikkyo Nomoto-cho, Higashiyama-ku, Kyoto-sh, Kyoto 95, 〒6050995, JP)
三洋化成工業株式会社 (〒95 京都府京都市東山区一橋野本町１１番地の１ Kyoto, 〒6050995, JP)
NAKADA, Shigekuni (11-1, Ikkyo Nomoto-cho, Higashiyama-ku, Kyoto-sh, Kyoto 95, 〒6050995, JP)
International Classes:
B01D21/01; C02F1/56; C02F11/14; C08F2/32
Attorney, Agent or Firm:
HAYASHI, Hiroshi (HAYASHI PATENT OFFICE, R402 VOICE21 Bldg., 342-1 Enpukuji-cho, Muromachi-Oike-Sagaru, Nakagyo-ku, Kyoto-sh, Kyoto 75, 〒6048175, JP)
Claims:
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