Oxidative cleaning process of contaminated slurries or...

Details Oxidative cleaning process of contaminated slurries or... Oxidative cleaning process of contaminated slurries or...

B - Operations, Transporting

09

C

B09C 1/08 (2006.01) C02F 11/08 (2006.01) A62D 3/00 (2006.01)

Patent

CA 2180560

In the process for treating contaminated mud or suspended earth, the mud or the suspended earth in concentrations of 3% to 25% dry matter is wet-oxidized by addition of pure oxygen or an oxygen-containing gas at a temperature of 120°C to 220°C, under a pressure of 3 bar to 50 bar and at pH values < 7. To accelerate the oxidation reaction, iron ions alone or in combination with quinones or quinone-forming substances are added to the mud or to the suspended earth.

Selon un procédé d'épuration de boues ou de terres en suspension contaminées, on oxyde par voie humide les boues ou les terres en suspension à une concentration comprise entre 3 % et 25 % de matière sèche, à une température comprise entre 120 ~C et 220 ~C, sous une pression comprise entre 3 bars et 50 bars, et à des valeurs de pH inférieures à 7, par adjonction d'oxygène pur ou d'un gaz contenant de l'oxygène. Afin d'accélérer la réaction d'oxydation, on ajoute aux boues ou aux terres en suspension des ions fer seuls ou associés à des quinones ou à des substances formant des quinones.

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