Improved method of dewatering sludge

Details Improved method of dewatering sludge Improved method of dewatering sludge

1992-02-18

1994-10-11

Reddick, Judy M.

Liquid purification or separation

Processes

Making an insoluble substance or accreting suspended...

210609, 210733, 210735, 210736, 210768, C02B 120, C02C 300

Patent

active

053544803

ABSTRACT:
The dewatering of sludge is improved by utilizing a water-soluble cationic copolymer in the aqueous phase of a water-in-oil emulsion wherein the copolymer has been prepared by (i) preparing an aqueous solution of a non-ionic monomer and a portion of the cationic monomer, (ii) emulsifying the aqueous solution in a hydro-carbon oil to form a water-in-oil emulsion, (iii) adding the balance of the total intended cationic monomer to the emulsion while substantially no polymerization is occurring, and (iv) polymerizing the monomers.

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