Catalyst for oxidative dehydrogenation of butene and method for producing the same

Patent metadata

Field	Value
Publication number	US-2021197179-A1
Application number	US-201816756561-A
Country	US
Kind code	A1
Filing date	Nov 27, 2018
Priority date	Nov 28, 2017
Publication date	Jul 1, 2021
Grant date	—

Abstract

The present invention relates to a catalyst for oxidative dehydrogenation of butene and a method for producing the same. The catalyst for oxidative dehydrogenation of butene has a large amount of Mo—Bi phase acting as a reaction active phase on the surface, and therefore, can exhibit high catalytic activity, high conversion rate and high butadiene selectivity in the oxidative dehydrogenation of butene.

First claim

1 . A catalyst for oxidative dehydrogenation of butene, which is represented by the following Composition Formula 1,
wherein a surface composition of the catalyst measured by X-ray photoelectron spectroscopy, a molar content of bismuth (Bi) is higher than a molar content of cobalt (Co),
Mo a Bi b Co c (M1) d (M4) e O f   [Composition Formula 1]

in Composition Formula 1, Mo is molybdenum, Bi is bismuth, Co is cobalt, O is oxygen, M1 is one or more Group 1 metal elements, M4 is one or more period 4 transition metal elements excluding cobalt (Co), a is from 9 to 25, b is from 0.5 to 2, c is from 1 to 10, d is from 0.01 to 1, e is from 0.5 to 5, and f is from 30 to 50.

2 . The catalyst for oxidative dehydrogenation of butene according to claim 1 , wherein the period 4 transition metal comprises at least one selected from the group consisting of titanium, vanadium, chromium, manganese, iron, nickel, copper, and zinc.

3 . The catalyst for oxidative dehydrogenation of butene according to claim 1 , wherein the Group 1 metal comprises at least one selected from the group consisting of sodium, potassium, rubidium, and cesium.

4 . The catalyst for oxidative dehydrogenation of butene according to claim 1 , wherein the catalyst satisfies the following Calculation Formula 1
BARS/BART>6,   [Calculation Formula 1]
in Calculation Formula 1 BARS is the molar content of bismuth/the molar content of cobalt on the catalyst surface, measured by XPS, and BART is the molar content of bismuth/the molar content of cobalt in the entire catalyst, measured by ICP-OES.

5 . A method for producing a catalyst for oxidative dehydrogenation of butene comprising
producing a first coprecipitate by mixing an aqueous solution containing a cobalt salt and a period 4 transition metal salt excluding cobalt, and an aqueous solution of ammonium molybdate, and performing co-precipitation; producing a second coprecipitate by mixing an aqueous solution of bismuth (Bi) salt and ammonium molybdate and performing co-precipitation; and mixing the first coprecipitate and the second coprecipitate; wherein producing the first coprecipitate or producing the second coprecipitate is independently performed by further mixing an aqueous solution containing a Group 1 metal salt.

6 . The method for producing a catalyst for oxidative dehydrogenation of butene according to claim 5 , wherein producing the first and second coprecipitates are each independently performed under stirring at a temperature of 30° C. to 50° C. for 0.5 to 2 hours.

7 . The method for producing a catalyst for oxidative dehydrogenation of butene according to claim 5 , wherein the period 4 transition metal comprises at least one selected from the group consisting of titanium, vanadium, chromium, manganese, iron, nickel, copper, and zinc.

8 . The method for producing a catalyst for oxidative dehydrogenation of butene according to claim 5 , wherein the Group 1 metal comprises at least one selected from the group consisting of sodium, potassium, rubidium, and cesium.

9 . The method for producing a catalyst for oxidative dehydrogenation of butene according to claim 5 , further comprising drying, grinding and classification, after mixing the first coprecipitate and the second coprecipitate.

10 . The method for producing a catalyst for oxidative dehydrogenation of butene according to claim 9 , wherein as part of classifying, only particles having a size of 355 μm or less are collected.

Assignees

• Lg Chemical Ltd

Inventors

• Cho Ara
• Byun Young Chang
• Hwang Gyo Hyun
• Bang Jungup
• Song Cheolock

Classifications

• B01J2235/15

  X-ray diffraction · CPC title

• B01J35/70

  characterised by their crystalline properties, e.g. semi-crystalline (catalysts comprising carbon B01J21/18; molecular sieves B01J29/00) · CPC title

• B01J35/40

  characterised by dimensions, e.g. grain size (in a colloidal state B01J35/23; crystallite size B01J35/77) · CPC title

• B01J2235/00

  Indexing scheme associated with group B01J35/00, related to the analysis techniques used to determine the catalysts form or properties · CPC title

• B01J23/882

  and cobalt · CPC title