Cationic polymers for sludge dewatering
AssigneeBetz Laboratories, Inc.
InventorsMichael R. Wood, Keith A. Bair, Fu Chen, Stephen R. Vasconcellos
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Abstract
A method of dewatering sludge is disclosed. This method comprises adding to the sludge an effective amount for the purpose of a polymer comprising repeat unit moieties of the compound methacryloyloxyethyl trimethyl ammonium chloride, said polymer having an intrinsic viscosity of about 1.0 to about 4.5 dl/g.
Claims10
A method of dewatering aqueous sludge, wherein said sludge consists essentially of a mixture of primary and secondary sludge from a pharmaceutical plant and secondary sludge from a chemical plant comprising adding to said sludge an effective amount for the purpose of a homopolymer comprising repeat unit moieties having the structure:
- ##STR2## wherein R is hydrogen or methyl and having an intrinsic viscosity from about 1.0 dl/g to about 2.9 dl/g as measured in 1M sodium chloride at 30.degree. C.
Dependencies are inferred from the claim text.