Method for purifying waste water using surface modified silica

Details Method for purifying waste water using surface modified silica Method for purifying waste water using surface modified silica

1991-05-09

1992-08-11

Silverman, Stanley S.

Liquid purification or separation

Processes

Ion exchange or selective sorption

210690, 210691, 210928, C02F 128, C02F 142

Patent

active

051376393

ABSTRACT:
Disclosed is a process for preparing surface modified silica sorption agent suitable for purifying contaminated aqueous liquid, the sorption agent comprising amorphous, precipitated, silica having surface deposited thereon an organic quaternary ammonium compound.

REFERENCES:
patent: 4058458 (1977-11-01), Svarz
patent: 4444665 (1984-04-01), Hildebrandt
patent: 4470912 (1984-09-01), Beall
patent: 4743306 (1988-05-01), Jepson et al.
patent: 4804416 (1989-02-01), Jepson et al.
patent: 4851128 (1989-07-01), Rose
patent: 4908137 (1990-03-01), Chen et al.
Roberts, et al., "Removal of Color from Kraft Pulp Mill Effluent", Proc. Ind. Waste conf., 40th, pp. 305-316 (1985).

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