Method for producing a catalyst for oxidative dehydrogenation of butene

Patent metadata

Field	Value
Publication number	US-2023271169-A1
Application number	US-202318134487-A
Country	US
Kind code	A1
Filing date	Apr 13, 2023
Priority date	Nov 28, 2017
Publication date	Aug 31, 2023
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 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.

2 . The method for producing a catalyst for oxidative dehydrogenation of butene according to claim 1 , 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.

3 . The method for producing a 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.

4 . The method for producing a 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.

5 . The method for producing a catalyst for oxidative dehydrogenation of butene according to claim 1 , further comprising drying, grinding and classification, after mixing the first coprecipitate and the second coprecipitate.

6 . The method for producing a catalyst for oxidative dehydrogenation of butene according to claim 5 , 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

• B01J35/19

  Catalysts containing parts with different compositions · CPC title