Mixed metal oxide catalysts

Patent metadata

Field	Value
Publication number	US-9550729-B2
Application number	US-201615225956-A
Country	US
Kind code	B2
Filing date	Aug 2, 2016
Priority date	Sep 21, 2011
Publication date	Jan 24, 2017
Grant date	Jan 24, 2017

Abstract

Catalytic compositions are provided that are effective for providing increased acrylonitrile product without a significant decrease in hydrogen cyanide and/or acetonitrile production and provide an overall increase in production of acrylonitrile, hydrogen cyanide and acetonitrile. The catalytic compositions include a complex of metal oxides and include at least about 15% m-phase plus t-phase by weight and have a weight ratio of m-phase to m-phase plus t-phase of 0.45 or greater.

First claim

What is claimed is:

1. A process for production of acrylonitrile comprising contacting propylene, ammonia and oxygen in a vapor phase in the presence of a metal oxide catalyst, the metal oxide catalyst having a formula:
Mo 12 Bi a Fe b A c D d E e F f G g Ce h O x
wherein A is at least one element selected from the group consisting of sodium, potassium, rubidium and cesium;
D is at least one element selected from the group consisting of nickel, cobalt, manganese, zinc, magnesium, calcium, strontium, cadmium and barium;
E is at least one element selected from the group consisting of chromium, tungsten, boron, aluminum, gallium, indium, phosphorus, arsenic, antimony, vanadium and tellurium;
F is at least one element selected from the group consisting of a rare earth element, titanium, zirconium, hafnium, niobium, tantalum, aluminum, gallium, indium, thallium, silicon, germanium, and lead;
G is at least one element selected from the group consisting of silver, gold, ruthenium, rhodium, palladium, osmium, iridium, platinum and mercury;
a is from 0.05 to 7;
b is from 0.1 to 7;
c is from 0.01 to 5;
d is from 0.1 to 12;
e is from 0 to 5;
f is from 0 to 5;
g is from 0 to 0.2;
h is from 0.01 to 5; and
x is a number of oxygen atoms required to satisfy valence requirements of other component elements,
wherein the catalytic composition includes at least about 15% m-phase plus t-phase by weight and has a weight ratio of m-phase to m-phase plus t-phase of 0.45 or greater, where amounts of m-phase and t-phase are determined using x-ray diffraction and a modified Rietveld analysis model,
wherein the catalytic composition is effective for providing an acrylonitrile yield (% AN) of 81 or greater and an acrylonitrile yield (% AN) plus acetonitrile yield (% ACN) plus hydrogen cyanide (% HCN) of 88 or more.

2. The process of claim 1 wherein the modified Rietveld analysis model includes four major phases.

3. The process of claim 1 wherein the catalyst composition includes a support selected from the group consisting of silica, alumina, zirconia, titania, or mixtures thereof.

4. The process of claim 1 wherein the catalytic composition includes at least about 18% m-phase plus t-phase by weight.

5. The process of claim 4 wherein the catalytic composition includes at least about 20% m-phase plus t-phase by weight.

6. The process of claim 5 wherein the catalytic composition includes at least about 22% m-phase plus t-phase by weight.

7. The process of claim 1 wherein the acrylonitrile yield (% AN) is 82 or greater.

8. The process of claim 7 wherein the acrylonitrile yield (% AN) is 83 or greater.

Assignees

• Brazdil James F
• Toft Mark A
• Mckenna Stephen T
• Ineos Europe Ag

Inventors

• Brazdil James F
• Toft Mark A
• Mckenna Stephen T

Classifications

• B01J35/38

  Abrasion or attrition resistance · CPC title

• C07C253/26 Primary

  containing carbon-to-carbon multiple bonds, e.g. unsaturated aldehydes · CPC title

• B01J23/8878

  Chromium · CPC title

• B01J23/002

  Mixed oxides other than spinels, e.g. perovskite · CPC title

• G01N23/20

  by using diffraction of the radiation by the materials, e.g. for investigating crystal structure; by using scattering of the radiation by the materials, e.g. for investigating non-crystalline materials; by using reflection of the radiation by the materials · CPC title