Method of dewatering suspensions with unsheared anionic flocculants
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 method of releasing water from a dispersion of suspended solids which comprises (a) adding to the suspension, as a true solution, from about 0.1 to 50,000 parts per million of suspension solids of an unsheared, water-soluble, branched, anionic, polymeric flocculant, said polymeric flocculant having a solution viscosity of at least about 3.0 mPa.multidot.s measured in a Brookfield viscometer with a UL adapter at 25.degree. C. on a 0.1 percent, by weight, polymer solution in 1M NaCl at 60 rpm, and a branching agent content of from about 4 to about 80 molar parts per million based on initial monomer content, and (b) dewatering the mixture of the dispersion of suspended solids and the anionic polymeric flocculant.
Dependencies are inferred from the claim text.