Moving bed process for carbothermally synthesizing nonoxide...

Details Moving bed process for carbothermally synthesizing nonoxide... Moving bed process for carbothermally synthesizing nonoxide...

C - Chemistry, Metallurgy

01

B

C01B 31/36 (2006.01) B01J 8/08 (2006.01) C01B 21/06 (2006.01) C01B 21/068 (2006.01) C01B 21/072 (2006.01) C01B 31/30 (2006.01) C01B 21/076 (2006.01)

Patent

CA 2105776

Carbothermally reduce a metal oxide to its corresponding metal nitride or metal carbide powder in a vertical gravity flow reactor (11) by adding prec- ursor pellets containing the metal oxide, a thermally decomposed binder mate- rial, and carbon or a source of carbon, directly to a heated reaction zone (31) within the reactor. The pellets form a pellet bed (19). The top of the bed (18) must be maintained within the heated reaction zone. The binder material is a blend of wheat and corn starches. The binder material thermally decomposes to a carbonaceous residue that functions both as an additional source of car- bon and as a binder for the precursor pellets.

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