Adsorbent, method for producing same, and method for...

Liquid purification or separation – Processes – Ion exchange or selective sorption

Reexamination Certificate

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Details

C210S691000, C210S692000, C210S693000, C210S694000, C502S416000, C502S418000

Reexamination Certificate

active

07666306

ABSTRACT:
The present invention provides an adsorbent comprising calcined coke with a BET surface area of 20 m2/g or less which is obtained by calcining a particular carbonaceous material at 1000 to 1500° C. and which is preferably obtained by calcining coal coke, petroleum coke or charcoal coke at 1000 to 1500° C. The adsorbent of the present invention exhibits adequate adsorbent ability with respect to an oil component in oil-containing wastewater even when the oil-containing wastewater is an emulsion or contains a low concentration of the oil component, and also stably maintains the adsorbent ability over a long period of time.

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S. Ragan et al., “Effects of calcination upon properties of needle-cokes,”J. Mater. Sci., 18 (1983), pp. 3695-3704.

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