Active carbon by potassium ion exchange and leaching of carbonac

Details Active carbon by potassium ion exchange and leaching of carbonac Active carbon by potassium ion exchange and leaching of carbonac

1976-03-18

1977-08-02

Garvin, Patrick P.

Compositions

Preservative agents

Anti-oxidants or chemical change inhibitants

423449, 423460, C01B 3116, C01B 3112, C01B 3110

Patent

active

040394735

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 carbonized (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 carbonization. Surface areas of up to 1500 m.sup.2 /g have been observed in the product. Additional activity can be achieved by subjecting the product to a conventional activation process.

REFERENCES:
patent: 2040931 (1936-05-01), Fuchs
patent: 2998375 (1961-08-01), Peterson et al.
patent: 3764561 (1973-10-01), Nishino et al.
patent: 3817874 (1974-06-01), Wennenberg et al.

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