Catalyst and method of manufacture

Patent metadata

Field	Value
Publication number	US-9687819-B2
Application number	US-201313892954-A
Country	US
Kind code	B2
Filing date	May 13, 2013
Priority date	Nov 24, 2009
Publication date	Jun 27, 2017
Grant date	Jun 27, 2017

Abstract

A catalyst system comprising a first catalytic composition comprising a homogeneous solid mixture containing at least one catalytic metal and at least one metal inorganic support. The pores of the solid mixture have an average diameter in a range of about 1 nanometer to about 15 nanometers. The catalytic metal comprises nanocrystals.

First claim

The invention claimed is:

1. A method comprising:
providing a solution comprising nanocrystals of at least one catalytic metal comprising silver metal;
adding the solution comprising the nanocrystals to a solution comprising a precursor of a metal inorganic support to form a first solution; and
forming a catalytic composition comprising a homogeneous solid mixture containing the nanocrystals and the metal inorganic support;
wherein the metal inorganic support comprises alumina and pores of the metal inorganic support have an average diameter in a range of about 1 nanometer to about 15 nanometers.

2. The method of claim 1 , wherein the step of preparing the solution comprising the nanocrystals comprises preparing the nanocrystals in the presence of a surfactant.

3. The method of claim 1 , wherein the step of preparing the solution comprising the nanocrystals is carried out at a temperature in a range of about 10 degrees Celsius to about 200 degrees Celsius.

4. The method of claim 1 , wherein the step of preparing the solution comprising the nanocrystals is carried out under vacuum in a range of about 0.5 millimeter of mercury to about 10 millimeter of mercury.

5. The method of claim 1 , wherein the step of preparing the solution comprising the nanocrystals comprises preparing the nanocrystals having a particle size distribution of less than about 20 percent.

6. The method of claim 1 , wherein the nanocrystals are present in an amount less than or equal to about 6 mole percent based on the weight of the homogenous solid mixture.

7. The method of claim 1 , wherein forming the first solution further comprises adding a solvent to the solution comprising the precursor of the metal inorganic support.

8. The method of claim 1 , further comprising:
forming a second solution comprising a solvent, and a templating agent; and
adding the second solution to the first solution to form a mixture.

9. The method of claim 1 , wherein the step of preparing the solution comprising the nanocrystals comprises preparing the nanocrystals having a particle size distribution of less than about 15 percent.

10. The method of claim 1 , wherein the step of preparing the solution comprising the nanocrystals comprises preparing the nanocrystals having a particle size distribution of less than about 10 percent.

11. The method of claim 1 , wherein the nanocrystals are present in an amount in a range of from about 3 mole percent to about 4 mole percent based on the weight of the homogenous solid mixture.

12. The method of claim 1 , wherein the nanocrystals are present in an amount less than or equal to about 3 mole percent based on the weight of the homogenous solid mixture.

13. The method of claim 1 , wherein the nanocrystals are present in an amount less than or equal to about 4 mole percent based on the weight of the homogenous solid mixture.

Assignees

• Gen Electric

Inventors

• Yin Ming
• Lewis Larry Neil
• Siclovan Oltea Puica
• Hancu Dan
• Winkler Benjamin Hale
• Norton Daniel George
• Mhadeshwar Ashish Balkrishna

Classifications

• B01J35/45

  Nanoparticles · CPC title

• B01J37/036

  to form a gel or a cogel · CPC title

• F01N2370/02

  used in catalytic reactors · CPC title

• F01N3/035

  with catalytic reactors · CPC title

• B01J37/0211

  using a colloidal suspension · CPC title