Purification of aqueous liquor

Details Purification of aqueous liquor Purification of aqueous liquor

1996-02-23

1997-12-16

Hruskoci, Peter A.

Liquid purification or separation

Processes

Making an insoluble substance or accreting suspended...

209 5, 210734, 210735, 210738, 210917, 423122, C02F 156

Patent

active

056981090

ABSTRACT:
An aqueous suspension of coagulatable material is coagulated by adding polymeric coagulant to the suspension and then separating the resultant coagulated material from the liquor. The coagulatable material may be present in the aqueous suspension as a suspension of suspended solids or as colloidally dispersed solids. The suspension may be coal tailings or other aqueous (generally mineral) suspension. The polymeric material must be a low molecular weight, highly ionic, polymeric material formed from a diallyl dialkyl ammonium salt. It is added to the aqueous suspension while in the form of polymeric particles having a size mainly above 30 .mu.m and that will dissolve into the suspension and coagulate the coagulatable material. An anionic high molecular weight, flocculant is generally added subsequently in order to flocculate the coagulated material.

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