Production of activated carbon in a reactor having a lower stati

Details Production of activated carbon in a reactor having a lower stati Production of activated carbon in a reactor having a lower stati

1978-07-14

1979-04-10

Douglas, Winston A.

Compositions

Preservative agents

Anti-oxidants or chemical change inhibitants

201 31, 432 15, C01B 3110, B01J 2118

Patent

active

041487524

ABSTRACT:
In the production of activated carbon by passing a preheated gaseous activation medium through a zone containing a bed of carbon-containing material while indirectly heating to maintain a temperature of about 500.degree. to 1100.degree. C., supplying carbon-containing material to the bed, and removing activated carbon from the bed, the improvement which comprises introducing the activation medium and the carbon-containing material co-current near the bottom of the zone at a rate such that gaseous products are formed in a quantity sufficient to maintain in the zone a lower static layer and an upper fluidized layer in particular proportions, the rate of supply of the carbon-containing material and withdrawal of activated carbon being related so as to convert about 30 to 55% by weight of the carbon-containing material to gaseous products. The average residence of the carbon-containing material is from about 0.2 to 6, preferably 1 to 4, hours. A suitable apparatus for carrying out the process is described.

REFERENCES:
patent: 2933454 (1960-04-01), Repik et al.
patent: 3565827 (1971-02-01), Friday
patent: 3910849 (1975-10-01), Kawabata et al.
patent: 4039290 (1977-08-01), Inada et al.

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