US 9,809,511 B2
Method for producing conjugated diolefin
Hideo Midorikawa, Tokyo (JP); and Mamoru Watanabe, Tokyo (JP)
Assigned to ASAHI KASEI CHEMICALS CORPORATION, Tokyo (JP)
Appl. No. 14/427,794
Filed by Asahi Kasei Chemicals Corporation, Tokyo (JP)
PCT Filed Oct. 16, 2013, PCT No. PCT/JP2013/078107
§ 371(c)(1), (2) Date Mar. 12, 2015,
PCT Pub. No. WO2014/061711, PCT Pub. Date Apr. 24, 2014.
Claims priority of application No. 2012-230223 (JP), filed on Oct. 17, 2012.
Prior Publication US 2015/0210614 A1, Jul. 30, 2015
Int. Cl. C07C 5/48 (2006.01); B01J 37/08 (2006.01); B01J 23/887 (2006.01); B01J 37/00 (2006.01)
CPC C07C 5/48 (2013.01) [B01J 23/8872 (2013.01); B01J 37/0045 (2013.01); B01J 37/08 (2013.01); B01J 2523/00 (2013.01); C07C 2521/08 (2013.01); C07C 2523/02 (2013.01); C07C 2523/04 (2013.01); C07C 2523/10 (2013.01); C07C 2523/18 (2013.01); C07C 2523/28 (2013.01); C07C 2523/745 (2013.01); C07C 2523/755 (2013.01); C07C 2523/883 (2013.01); C07C 2523/887 (2013.01)] 13 Claims
OG exemplary drawing
 
1. A method for producing a conjugated diolefin, the method comprising:
feeding a monoolefin having four or more carbon atoms and an oxygen-containing gas into a fluidized bed reactor having an oxide catalyst containing molybdenum therein, and bringing the oxide catalyst, the monoolefin having four or more carbon atoms, and the oxygen-containing gas into contact with each other to produce a conjugated diolefin,
wherein at least 50% or more of a total amount of the oxygen-containing gas is fed from an oxygen-containing gas feed nozzle located at a bottom of the fluidized bed reactor,
wherein the monoolefin having four or more carbon atoms is fed from a plurality of monoolefin feed nozzles installed at n places located at heights a1, a2, . . . , and an from the oxygen-containing gas feed nozzle, respectively,
wherein the plurality of monoolefin feed nozzles at the heights a1, a2, . . . , and an feed the monoolefin having four or more carbon atoms at ratios of b1, b2, . . . , and bn, respectively, based on a total amount of the monoolefin having four or more carbon fed into the fluidized bed reactor such that b1+b2+ . . . +bn=1, and
wherein a weighted mean value represented by the following formula is 100 mm or greater:
weighted mean value=a1*b1+a2*b2+ . . . +an*bn.