Process for preparing a flocculant for water treatment

Details Process for preparing a flocculant for water treatment Process for preparing a flocculant for water treatment

2002-05-24

2008-03-04

Metzmaier, Daniel S. (Department: 1796)

Compositions

Water-softening or purifying or scale-inhibiting agents

Water-insoluble base-exchange agent containing

C252S060000, C210S716000, C516S080000

Reexamination Certificate

active

07338617

ABSTRACT:
The invention provides metal-silica polymeric flocculants having high coagulation performance which are used for water treatment, particularly to remove suspended materials and other impurities from irrigation water, waste water or the like. A silica sol having a SiO2concentration of from 100 to 200 g/L and a viscosity of less than 6 cp is prepared by colliding an inorganic acid aqueous solution with a silicate aqueous solution at each rate of 5 m/sec or more. The silica sol is aged to make an aged silica sol having a viscosity of 6 to 30 cp, and the aged silica sol is mixed with a water-soluble metal salt such as ferric chloride, to prepare the flocculants.

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