Gaseous reaction apparatus and processes including a peripheral

Details Gaseous reaction apparatus and processes including a peripheral Gaseous reaction apparatus and processes including a peripheral

1974-02-25

1976-06-22

Bashore, S. Leon

Paper making and fiber liberation

Apparatus

Digester

68 5C, 162 41, 162 43, 162 44, 162 47, 162 63, 162 65, 162237, 162246, D21C 700, D21C 706

Patent

active

039649628

ABSTRACT:
Gaseous reaction apparatus wherein a portion of the supplied gas is discharged from the reaction vessel at a location below the upper level of a therein contained columnar mass of material wherein the gas is discharged into a receiving chamber extending along the outer periphery of the vessel and open to the lower portion of the vessel through an unrestricted opening being free from screens and filters, and such discharged 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 removing or redistributing heat therein. Such apparatus is particularly useful in the gas phase treatment of fibrous material such as the bleaching or delignification of lignin-containing cellulose pulp.

REFERENCES:
patent: 1633735 (1927-06-01), Fish, Jr.
patent: 1669234 (1928-05-01), Dunbar
patent: 2695232 (1954-11-01), Richter
patent: 2717195 (1955-09-01), Armstrong
patent: 2733992 (1956-02-01), Reyerson
patent: 3503846 (1970-03-01), Nardi
patent: 3607618 (1971-09-01), Uschmann
patent: 3654070 (1972-04-01), Pradt et al.
patent: 3660225 (1972-05-01), Verreyne et al.
patent: 3703435 (1972-11-01), Schleinofer
patent: 3814664 (1974-06-01), Carlsmith

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