Treatment of waste paper

Details Treatment of waste paper Treatment of waste paper

C - Chemistry, Metallurgy

02

F

C02F 11/06 (2006.01) C02F 11/08 (2006.01) D21C 5/02 (2006.01) D21C 11/14 (2006.01)

Patent

CA 2175935

A process for recovering inorganic material from an effluent suspension produced in the treatment of waste paper. The effluent suspension, in the form of an aqueous suspension containing at least 2% by weight of dry solids, is contacted with an oxygen-containing gas at an elevated temperature, and at an elevated pressure sufficient to keep the water component of the sludge in the liquid phase, for a time sufficient to effect substantially complete oxidation of the organic material in the suspension. The resulting product is dewatered and then resuspended in water, whereafter theme is separated from the suspension water containing fine carbon particle, in suspension to leave the desired inorganic material.

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