Methods for reacting chemical streams with catalysts comprising silica, alumina, and tungsten

Patent metadata

Field	Value
Publication number	US-11344874-B2
Application number	US-202117318256-A
Country	US
Kind code	B2
Filing date	May 12, 2021
Priority date	Jan 24, 2019
Publication date	May 31, 2022
Grant date	May 31, 2022

Abstract

One or more embodiments presently disclosed is directed to a method for reacting a chemical stream which may include contacting the chemical stream with a catalyst to produce a product stream. The catalyst may include alumina, silica, and a catalytically active compound such as tungsten.

First claim

What is claimed is:

1. A method for reacting a chemical stream, the method comprising:
contacting the chemical stream with a catalyst to produce a product stream, wherein the chemical stream comprises at least 2-butene and the product stream comprises at least propylene which is the result of both isomerization and metathesis of at least the 2-butene;
wherein the contacting of the chemical stream with the catalyst is at a temperature of less than or equal to 500° C.; and
the catalyst comprises:
a plurality of catalyst support particles comprising from 0.1 weight percent to 5 weight percent alumina and from 95 weight percent to 99.9 weight percent silica based on the total weight of the catalyst support particles; and
a catalytically active compound deposited onto surfaces of the plurality of catalyst support particles, the surfaces of the plurality of catalyst support particles being accessible to gases and vapors, wherein the catalytically active compound comprises tungsten and the catalytically active compound is deposited on from 1% to 50% of the surfaces of the catalyst support particles that are accessible to gases and vapors.

2. The method of claim 1 , wherein the chemical stream comprises at least 5 mol. % 2-butene.

3. The method of claim 2 , wherein the product stream comprises at least 10 mol. % propylene.

4. The method of claim 1 , wherein the chemical stream has a space velocity of at least 1000/hour.

5. The method of claim 1 , wherein the catalyst comprises from 2 weight percent to 11 weight percent of the catalytically active compound based on the total weight of the catalyst.

6. The method of claim 1 , wherein the catalytically active compound comprises at least one of single atoms, single molecules, clusters, particles, or combinations of these of the catalytically active compound deposited on the surfaces of the plurality of catalyst support particles.

7. The method of claim 1 , wherein an interior of the catalyst support particles is substantially free of the catalytically active compounds.

8. The method of claim 1 , wherein the catalytically active compound deposited onto surfaces of the plurality of catalyst support particles has an average crystalline size of less than 2.5 nanometers.

9. A method for reacting a chemical stream, the method comprising:
contacting the chemical stream with a catalyst to produce a product stream, wherein the chemical stream comprises at least 2-butene and the product stream comprises at least propylene which is the result of both isomerization and metathesis of at least the 2-butene;
wherein the contacting of the chemical stream with the catalyst is at a temperature of less than or equal to 500° C.; and
the catalyst comprises:
a plurality of catalyst support particles comprising from 0.1 weight percent to 5 weight percent alumina and from 95 weight percent to 99.9 weight percent silica based on the total weight of the catalyst support particles; and
a catalytically active compound deposited onto surfaces of the plurality of catalyst support particles, the surfaces of the plurality of catalyst support particles being accessible to gases and vapors, wherein the catalytically active compound comprises tungsten and the catalytically active compound is deposited on from 1% to 50% of the surfaces of the catalyst support particles that are accessible to gases and vapors;
wherein the tungsten is not dispersed throughout the catalyst support particles.

10. The method of claim 9 , wherein the chemical stream comprises at least 5 mol. % 2-butene.

11. The method of claim 10 , wherein the product stream comprises at least 10 mol. % propylene.

12. The method of claim 9 , wherein the chemical stream has a space velocity of at least 1000/hour.

13. The method of claim 9 , wherein the catalyst comprises from 2 weight percent to 11 weight percent of the catalytically active compound based on the total weight of the catalyst.

14. The method of claim 9 , wherein the catalytically active compound comprises at least one of single atoms, single molecules, clusters, particles, or combinations of these of the catalytically active compound deposited on the surfaces of the plurality of catalyst support particles.

15. The method of claim 9 , wherein an interior of the catalyst support particles is substantially free of the catalytically active compounds.

16. The method of claim 9 , wherein the catalytically active compound deposited onto surfaces of the plurality of catalyst support particles has an average crystalline size of less than 2.5 nanometers.

Assignees

• Saudi Arabian Oil Co

Inventors

• Hanna Brian
• Ostraat Michele

Classifications

• B01J2235/30

  Scanning electron microscopy; Transmission electron microscopy · 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

• B01J35/393

  Metal or metal oxide crystallite size · CPC title

• C07C4/06

  Catalytic processes {(C07C4/025 takes precedence)} · CPC title

• B01J2523/69

  Tungsten · CPC title