# US 9,751,819 B2 · Method of preparing butadiene

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- Number: US 9,751,819 B2
- Document ID: US9751819B2
- Status: Granted
- Kind: B2
- Application number: 15/035,430
- Filed: 2015-11-25
- Published: 2016-12-01
- Granted: 2017-09-05
- Earliest claimed: 2014-12-16
- Assignees: LG Chem, Ltd.
- Applicants: LG Chem, Ltd.
- Inventors: Dae Heung Choi; Dong Hyun Ko; Myung Ji Suh; Kyong Yong Cha; Ye Seul Hwang; Jun Han Kang; Hyun Seok Nam; Joo Hyuck Lee; Sang Jin Han; Jun Kyu Han
- Web page: https://patentgrep.com/patent/US9751819B2

## CPC

- C07C 5/48: with oxygen as an acceptor
- B01J 23/00: Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00 (B01J21/16 takes precedence)
- B01J 23/002: {Mixed oxides other than spinels, e.g. perovskite}
- B01J 23/8876: {Arsenic, antimony or bismuth}
- B01J 35/36: Mechanical strength
- B01J 37/031: {Precipitation}
- B01J 2235/00: Indexing scheme associated with group B01J35/00, related to the analysis techniques used to determine the catalysts form or properties
- B01J 2523/00: Constitutive chemical elements of heterogeneous catalysts
- C07C 2523/02: of the alkali- or alkaline earth metals or beryllium
- C07C 2523/887: containing in addition other metals, oxides or hydroxides provided for in groups C07C2523/02 - C07C2523/36
- C07C: ACYCLIC OR CARBOCYCLIC COMPOUNDS
- B01J: CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS

## Abstract

The present invention relates to a method of preparing butadiene. More particularly, the present invention relates to a method of preparing butadiene by feeding butene and oxygen into a reactor containing a composite metal oxide catalyst and performing oxidative dehydrogenation, wherein a mole ratio of the oxygen to the butene is 1.8 to 2.2. In accordance with the present invention, a method of preparing butadiene to secure long-term operation stability by maintaining the intensity of a catalyst despite oxidative dehydrogenation and not to decrease selectivity due to less side reaction is provided.

## Claims

### Claim 1

A method of preparing butadiene, comprising:
feeding 1-butene, oxygen, nitrogen and steam into a reactor containing a composite metal oxide catalyst, wherein:
a mole ratio of the butene to the nitrogen is 1:10 to 30; and
the composite metal oxide catalyst comprises a composite metal oxide of Formula 1:
Mo12Bi0.8 to 2Fe0.8 to 2Co6 to 10Cs0.01 to 0.9K0.01 to 0.5Oy [Formula 1]
wherein y is a value determined to adjust valence to other constituting elements; and
performing oxidative dehydrogenation of the 1-butene to produce butadiene, wherein a mole ratio of the oxygen to the butene is 1.8 to 2.2.

### Claim 2 (depends on 1)

The method according to claim 1, wherein the butene is 1-butene.

### Claim 3 (depends on 1)

The method according to claim 1, wherein, in the oxidative dehydrogenation, a gas hourly space velocity (GHSV) based on butene is 30 to 80 h−1.

### Claim 4 (depends on 1)

The method according to claim 1, wherein, in the oxidative dehydrogenation, carbon dioxide is further included.

### Claim 5 (depends on 1)

The method according to claim 1, wherein, in the reaction, a mole ratio of butene:steam is 1:1 to 12.

### Claim 6 (depends on 1)

The method according to claim 1, wherein the reactor is a tubular reactor, a tank reactor, a fluidized bed reactor, or a fixed bed reactor.

### Claim 7 (depends on 1)

The method according to claim 1, wherein the oxidative dehydrogenation is carried out at a temperature of 320° C.

### Claim 8 (depends on 1)

The method according to claim 1, wherein the steam is introduced into the reactor using a vaporizer and vaporized at a temperature of 340° C.

### Claim 9 (depends on 1)

The method according to claim 1, wherein a mole ratio of the oxygen to the butene is 1.8.