Active carbon

Details Active carbon Active carbon

C - Chemistry, Metallurgy

01

B

252/26

C01B 31/08 (2006.01) C01B 31/10 (2006.01) C01B 31/12 (2006.01)

Patent

CA 1057729

ABSTRACT A high yield active carbon is obtained from brown coal, lignite and similar carbonaceous materials. The brown coal is converted into a potassium-coal by reaction with an aqueous solution containing potassium ions; the potassium-coal is carbonised (pyrolysed) and the char so produced is leached to remove the bound potassium ions. The potassium- coal can be tabletted or extruded prior to the carbonisation. Surface areas of up to 1500 m2/g have been observed in the product. Additional activity can be achieved by subjecting the product to a conventional activation process. - 1 -

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