Method for production of conjugated diolefin
AssigneeAsahi Kasei Chemicals Corporation
InventorsHideo Midorikawa, Hiroyuki Yano, Takashi Kinoshita
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Abstract
There is provided a method for production of a conjugated diene from a monoolefin having four or more carbon atoms by a fluidized bed reaction. The method for production of a conjugated diolefin includes bringing a catalyst in which an oxide is supported on a carrier into contact with a monoolefin having four or more carbon atoms in a fluidized bed reactor in which the catalyst and oxygen are present, wherein the method satisfies the following (1) to (3): (1) the catalyst contains Mo, Bi, and Fe; (2) a reaction temperature is in the range of 300 to 420° C.; and (3) an oxygen concentration in a reactor outlet gas is in the range of 0.05 to 3.0% by volume.
Claims8
A method for production of a conjugated diolefin comprising bringing a catalyst in which an oxide is supported on a carrier into contact with a monoolefin having four carbon atoms in a fluidized bed reactor in which the catalyst and oxygen are present, wherein the method satisfies the following (1) to (3):
- (1) the oxide contains Mo, Bi, and Fe;
- (2) a reaction temperature is in a range of 300 to 420° C.;
- and
- (3) an oxygen concentration in a reactor outlet gas is in a range of 0.05 to 0.7% by volume;
- wherein the oxide is represented by the following empirical formula:
- Mo12BipFegAaBbCcDdEeOx
- wherein A is at least one element selected from the group consisting of nickel and cobalt;
- B is at least one element selected from alkali metal elements;
- C is at least one element selected from the group consisting of magnesium, calcium, strontium, barium, zinc, and manganese;
- D is at least one rare earth element;
- E is at least one element selected from the group consisting of chromium, indium, and gallium;
- O is oxygen;
- p, q, a, b, c, d, e, and x represent an atomic ratio of bismuth, iron, A, B, C, D, E, and oxygen, respectively, to 12 molybdenum atoms;
- 0.1≦p≦5, 0.5≦q≦8, 1.7≦a≦10, 0.02≦b≦2, 0.5≦c≦5, 0.02≦d≦5, and 0≦e≦5 are satisfied;
- and x is the number of oxygen atoms required for satisfying the valence requirement of the other elements present.
Dependencies are inferred from the claim text.