Gaseous reaction apparatus and processes

Details Gaseous reaction apparatus and processes Gaseous reaction apparatus and processes

B - Operations, Transporting

01

J

23/368, 23/419,

B01J 12/00 (2006.01) B01J 19/18 (2006.01) D21C 9/10 (2006.01)

Patent

CA 1037228

ABSTRACT OF THE DISCLOSURE Gaseous reaction apparatus and processes wherein a portion of the supplied gas is discharged from the re- action vessel at a location below the upper level of a therein contained columnar mass of material and such dis- charged portion of the gas, with or without cooling, is recirculated back into the upper inlet end of the vessel, thereby controlling the temperature in the vessel by re- moving or redistributing heat therein. Such apparatus and processes are particularly useful in the gas phase treatment of fiberous material such as the bleaching or delignification of lignin-containing cellulose pulp.

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