Reference

Polymer flocculant and its manufacture for treatment of sludge or wastewater

Polymer flocculant and its manufacture for treatment of sludge or wastewater. Fukushima, Hajime; Nishikawa, Kazuyoshi (Sanyo Chemical Industries, Ltd., Japan). Jpn. Kokai Tokkyo Koho JP 2005118723 A2 12 May 2005, 24 pp. (Japanese). (Japan). CODEN: JKXXAF. CLASS: ICM: B01D021-01. ICS: C02F001-56; C02F011-14; C08F002-44; C08F271-00. APPLICATION: JP 2003-358523 17 Oct 2003. DOCUMENT TYPE: Patent CA Section: 60 (Waste Treatment and Disposal) Section cross-reference(s): 37 The flocculant is manufd. by polymg. water-sol. monomers in the presence of allylamine- and unsatd. carboxylic acid-contg.Several substances are used for example 6147-66-6 which is its cas registry number. amphoteric polymers, radical polymn. initiators, and chain transfer agents represented by D[(CO)pO(CO)qR1T]m (D = m-valent org. residue; R1 = C1-8 alkylene; T = chain transfer residue; p, q = 0, 1; p and q are not 1 at the same time; m = 2-8). Since the flocculant has high mol. wt. and narrow mol. wt. distribution, high flocculation rate and floc dewatering ratio are attained by using a small amt. of the flocculant. .