Bimetallic titania-based electrocatalysts deposited on ionic conductors for hydrodesulfurization reactions

Patent metadata

Field	Value
Publication number	US-9718046-B2
Application number	US-201113114156-A
Country	US
Kind code	B2
Filing date	May 24, 2011
Priority date	May 24, 2011
Publication date	Aug 1, 2017
Grant date	Aug 1, 2017

Abstract

This invention relates to a method for preparing a bimetallic titania-based catalyst for use in hydrodesulfurization reactions.

First claim

What is claimed is:

1. A method of preparing a CoMo/TiO 2 catalyst using co-impregnation under Equilibrium Deposition Filtration (EDF), which comprises the sequential steps of:
a) first dissolving a molybdenum salt in water and adjusting the pH of the solution to an acid value;
b) followed by dissolving a titania compound in the solution of step a) and adjusting the pH of the solution to an acid value;
c) followed by dissolving a cobalt salt in the solution of step b) to adsorb said cobalt onto said titania compound with said molybdenum and adjusting the pH of the solution to an acid value;
d) evaporating the solution of step c);
e) collecting a CoMo/TiO 2 solid; and
f) calcining the CoMo/TiO 2 to form a catalyst.

2. The method according to claim 1 , wherein the pH in step a) is adjusted to 4.3.

3. The method according to claim 2 , wherein the pH of the solution in step a) is adjusted with HNO 3 .

4. The method according to claim 1 , wherein the pH in step b) is adjusted to 4.3.

5. The method according to claim 4 , wherein the pH of the solution in step b) is adjusted to 4.3.

6. The method according to claim 1 , wherein the evaporation in step e) is conducted at a temperature of about 40° C. to about 45° C. and at a pressure of 30 mbar.

7. The method according to claim 1 , wherein the calcinations in step e) is conducted at about 500° C. for about 2 hours.

8. The method according to claim 1 , wherein the final composition of the catalyst is about 14.2 wt. % MoO 3 , 3.2 wt. % CoO and 82.6 wt. % TiO 2 .

9. The method of claim 1 , wherein the acid value of (a), (b), and (c) is 4.3.

10. The method of claim 1 , wherein said Mo salt is ammonium heptamolybdate, said titania compound is TiO 2 and said cobalt salt is cobalt nitrate.

Assignees

• Hammad Ahmad D
• Hamad Esam Zaki
• Panagiotou George
• Kordulis Christos
• Theleritis Demetrios
• Saudi Arabian Oil Co

Inventors

• Hammad Ahmad D
• Hamad Esam Zaki
• Panagiotou George
• Kordulis Christos
• Theleritis Demetrios

Classifications

• B01J21/063 Primary

  Titanium; Oxides or hydroxides thereof · CPC title

• B01J37/347

  Ionic or cathodic spraying; Electric discharge · CPC title

• B01J37/0242

  Coating followed by impregnation · CPC title

• H01M8/0675

  Removal of sulfur · CPC title

• B01J23/882 Primary

  and cobalt · CPC title