Patent Number: 6,294,622

Title: Polymer flocculants with improved dewatering characteristics

Abstract: A high molecular weight water soluble acrylamide based polymer having improved flocculating properties is provided. The polymer is prepared by a process, in which a small quantity of a chain branching agent is added to the polymerization reaction mixture continuously or semi-continuously while the monomers are polymerized. The polymer is useful in solid/liquid separations such as flocculants and coagulants in waste water treatment applications, and as thickening agents.

Inventors: Barajas; Jose Hernandez (Rennes, CH), Wandrey; Christine (Ecublens, CH), Hunkeler; David (St. Sulpice, CH)

Assignee: Ecole Polytechnique Federale de Lausanne (EPFL)

International Classification: C08F 2/12 (20060101); C08F 2/16 (20060101); C08F 002/16 ()

Expiration Date: 09/25/2018