Method for producing butadiene
AssigneeLG Chem, Ltd.
InventorsMyungji Suh, Jun Han Kang, Kyong Yong Cha, Dong Hyun Ko
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Abstract
An exemplary embodiment of the present application provides a method for preparing butadiene, the method comprising a process of performing an oxidative dehydrogenation reaction by introducing a reactant comprising butene, oxygen, nitrogen, and steam into a reactor which is filled with a catalyst, in which during a first start-up of the oxidative dehydrogenation reaction, the oxygen is introduced into the reactor before the butene, or the oxygen is introduced into the reactor simultaneously with the butene.
Claims11
A method for producing butadiene, the method comprising performing an oxidative dehydrogenation reaction step by introducing a reactant comprising butene, oxygen, nitrogen, and steam into a reactor which is filled with a catalyst,
- wherein during a first start-up of the oxidative dehydrogenation reaction:
- (1) oxygen and nitrogen are first simultaneously introduced into the reactor, and then steam is introduced into the reactor, and then butene is finally introduced into the reactor;
- or
- (2) nitrogen and steam are first simultaneously introduced into the reactor, then oxygen and butene are simultaneously introduced into the reactor;
- or
- (3) steam and oxygen are first simultaneously introduced into the reactor, then nitrogen is introduced into the reactor, and then butene is finally introduced into the reactor;
- wherein when at least a part of the reactant comprising butene, oxygen, nitrogen, and steam is stopped from being supplied, the oxidative dehydrogenation reaction is stopped and a purge process is performed by introducing one or more of air and steam into the reactor where the temperature during the oxidative dehydrogenation reaction is maintained at the time of the purge process.
Dependencies are inferred from the claim text.