Process for making high performance anionic polymeric flocculating agents
AssigneeCytec Technology Corp.
InventorsRoderick Glyn Ryles, Roger Edgar Neff, Joseph Jacinto Pellon
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Abstract
Unsheared, water-soluble, branched, high molecular weight, anionic, polymeric flocculants are produced by polymerizing ethylenically unsaturated anionic, and optionally non-ionic, monomers and a branching agent in the presence of a chain-transfer agent. They are useful as flocculating agents for releasing water from dispersions of suspended solids.
Claims7
A process for the preparation of an unsheared, water-soluble anionic, branched, polymeric flocculant, said polymeric flocculant having a solution viscosity of at least 3.0 mPa.s measured in a Brookfield viscometer with a UL adapter at 25° C. on a 0.1 percent, by weight, polymer solution in 1M NaCl at 60 rpm, said polymeric flocculant being efficient when added as a true solution to dispersions of suspended solids for the purpose of releasing water therefrom, said process comprising polymerizing one or more anionic, water-soluble, ethylenically unsaturated monomers with at least one branching agent in an amount from about 4 to about 80 molar parts per million based on initial monomer content, in the presence of at least one chain transfer agent.
Dependencies are inferred from the claim text.