Method for producing a catalyst for oxidative dehydrogenation of butene

Patent metadata

Field	Value
Publication number	US-12076709-B2
Application number	US-202318134487-A
Country	US
Kind code	B2
Filing date	Apr 13, 2023
Priority date	Nov 28, 2017
Publication date	Sep 3, 2024
Grant date	Sep 3, 2024

Abstract

A catalyst for oxidative dehydrogenation of butene and a method for producing the same are described. The method includes forming a first coprecipitate, forming a second coprecipitate, and mixing the first and second coprecipitates under conditions that product a catalyst having a favorable surface chemistry profile.

First claim

The invention claimed is:

1. A method for producing a catalyst for oxidative dehydrogenation of butene comprising:
producing a first coprecipitate by mixing a first aqueous solution containing a cobalt salt, a salt of at least one of Fe, Mn and Cu, a salt of at least one of K and Cs, and a salt of cobalt with a second aqueous solution containing ammonium molybdate, and performing co-precipitation while stirring at 30° C. to 50° C. for 0.5 to 2 hours;
producing a second coprecipitate by mixing a third aqueous solution of bismuth (Bi) with a fourth aqueous solution containing ammonium molybdate, and performing co-precipitation while stirring at 30° C. to 50° C. for 0.5 to 2 hours; and
aging the second coprecipitate; and
mixing the first coprecipitate and the second coprecipitate to form a slurry;
drying the slurry;
grinding and calcining the dried slurry to produce catalyst particles, wherein a surface composition of the catalyst particles, measured by X-ray photoelectron spectroscopy (XPS), has a molar content of bismuth (Bi) that is higher than a molar content of cobalt (Co), a composition according to Composition Formula 1;
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 of potassium (K) and cesium (Cs),
M4 is one or more of iron (Fe), manganese (Mn), and copper (Cu),
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,
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 a molar content of bismuth/a molar content of cobalt in the entire catalyst, measured by inductively coupled plasma optical emission spectroscopy (ICP-OES).

2. The method for producing a catalyst for oxidative dehydrogenation of butene according to claim 1 , further comprising classifying the catalyst particles after the grinding.

3. The method for producing a catalyst for oxidative dehydrogenation of butene according to claim 2 , wherein as part of the 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

• C07C11/167

  1, 3-Butadiene · CPC title