Multi-lobed porous ceramic body and process for making the same

Patent metadata

Field	Value
Publication number	US-9694355-B2
Application number	US-201514677090-A
Country	US
Kind code	B2
Filing date	Apr 2, 2015
Priority date	Dec 29, 2010
Publication date	Jul 4, 2017
Grant date	Jul 4, 2017

Abstract

A carrier having at least three lobes, a first end, a second end, a wall between the ends and a non-uniform radius of transition at the intersection of an end and the wall is disclosed. A catalyst comprising the carrier, silver and promoters deposited on the carrier and useful for the epoxidation of olefins is also disclosed. A method for making the carrier, a method for making the catalyst and a process for epoxidation of an olefin with the catalyst are also disclosed.

First claim

What is claimed is:

1. A packed catalyst bed comprising catalyst particles, said catalyst particles comprising silver and promoters useful for the epoxidation of ethylene, said silver and promoters deposited on a shaped porous ceramic body comprising a first end, a second end, and a wall disposed between and intersecting said ends, said wall comprising at least three lobes and three valleys formed in the length of the wall, said lobes rounded at the intersection of said first end and said wall and said valleys not rounded at the intersection of said first end and said wall, each valley located between two of said lobes, and wherein said catalyst bed has a silver loading of at least 50 kg of silver/m 3 of catalyst bed.

2. The packed catalyst bed of claim 1 wherein said catalyst bed has a silver loading of at least 150 kg of silver/m 3 of catalyst bed.

3. The packed catalyst bed of claim 1 wherein said catalyst bed has a silver loading of at least 200 kg of silver/m 3 of catalyst bed.

4. The packed catalyst bed of claim 1 wherein said catalyst bed has a silver loading of at least 250 kg of silver/m 3 of catalyst bed.

5. The packed catalyst bed of claim 1 wherein said catalyst bed has a silver loading of at most 850 kg of silver/m 3 of catalyst bed.

6. The packed catalyst bed of claim 1 wherein said catalyst bed has a silver loading of at most 600 kg of silver/m 3 of catalyst bed.

7. The packed catalyst bed of claim 1 wherein said catalyst bed has a silver loading of at most 550 kg of silver/m 3 of catalyst bed.

8. The packed catalyst bed of claim 1 wherein said silver on said catalyst particles exceeds 8 weight percent of the weight of the catalyst.

9. The packed catalyst bed of claim 1 wherein said silver on said catalyst particles exceeds 10 weight percent of the weight of the catalyst.

10. The packed catalyst bed of claim 1 wherein said silver on said catalyst particles exceeds 12 weight percent of the weight of the catalyst.

11. The packed catalyst bed of claim 10 wherein said catalyst bed has a silver loading of at least 250 kg and of at most 550 kg of silver/m 3 of catalyst bed.

Assignees

• Saint-Gobain Ceram & Plastics Inc

Inventors

• Richard Michael A
• Covey John David

Classifications

• C07C213/04 Primary

  by reaction of ammonia or amines with olefin oxides or halohydrins · CPC title

• C07D301/04

  with air or molecular oxygen · CPC title

• B01J37/024

  Multiple impregnation or coating · CPC title

• B01J37/0201

  Impregnation · CPC title

• B01J23/688 Primary

  with manganese, technetium or rhenium · CPC title