Catalyst Ta-Nb for the production of 1,3-butadiene

Patent metadata

Field	Value
Publication number	US-10792644-B2
Application number	US-201615744386-A
Country	US
Kind code	B2
Filing date	Jul 5, 2016
Priority date	Jul 13, 2015
Publication date	Oct 6, 2020
Grant date	Oct 6, 2020

Abstract

The invention relates to a catalyst that comprises a mesoporous oxide matrix, with said matrix comprising at least one oxide of an element X that is selected from among silicon and titanium, taken by itself or in a mixture, with said catalyst comprising at least the tantalum element and the niobium element, with the tantalum mass representing between 0.1 to 30% by weight of the mass of the mesoporous oxide matrix, the niobium mass representing between 0.02 to 6% by weight of the mass of the mesoporous oxide matrix, the content by mass of the tantalum element being greater than or equal to the content by mass of the niobium element. The invention also relates to the use of this catalyst in a method for the production of 1,3-butadiene from a feedstock that comprises at least ethanol.

First claim

The invention claimed is:

1. A catalyst comprising a mesoporous oxide matrix, said matrix comprising at least one oxide of an element X that is silicon or titanium, alone or in a mixture, said catalyst comprising tantalum and niobium, having a tantalum mass of 0.1 to 30% of the mass of the mesoporous oxide matrix, a niobium mass of 0.02 to 6% of the mass of the mesoporous oxide matrix, the content by mass of the tantalum element in said catalyst being greater than or equal to the content by mass of the niobium element in said catalyst, said catalyst being prepared by consecutive introduction of the niobium element and then the tantalum element.

2. The catalyst according to claim 1 , in which said oxide matrix is mesostructured.

3. The catalyst according to claim 1 , in which said oxide matrix is a silicon oxide that has a specific surface area of 100 to 1,200 m 2 /g, a mesopore volume of between 0.2 and 1.8 ml/g and a mesopore diameter of between 4 and 50 nm.

4. The catalyst according to claim 3 , in which said oxide matrix contains an alkaline metal content that is expressed in terms of % by weight of metal in relation to the mass of the mesoporous matrix of less than 1% by weight.

5. The catalyst according to claim 1 , further comprising at least one element of groups 1, 2, 3, 4 of the periodic table, or mixtures thereof, with the mass of said element representing between 0.01 and 5% of the mass of said mesoporous oxide matrix.

6. The catalyst according to claim 5 , further comprising at least one element of groups 1 or 2 of the periodic table, or mixtures thereof, with the mass of said element representing between 0.01 and 5% of the mass of said mesoporous oxide matrix.

7. The catalyst according to claim 6 , comprising at least one element that is Cs, Ca, Ba, or mixtures thereof, with the mass of said element representing between 0.01 and 5% of the mass of said mesoporous oxide matrix.

8. The catalyst according to claim 1 , further comprising at least one element of groups 11 or 12 of the periodic table, or mixtures thereof, with the mass of said element representing between 0.5 and 10% of the mass of said mesoporous oxide matrix.

9. The catalyst according to claim 8 , comprising at least Zn, with the mass of Zn representing between 0.5 and 10% of the mass of said mesoporous oxide matrix.

10. A process for the production of 1,3-butadiene from a feedstock that comprises at least ethanol, comprising contacting said feedstock with a catalyst according to claim 1 , at a temperature of between 300 and 400° C., a pressure of between 0.15 and 0.5 MPa, and a volumetric flow rate of between 0.5 and 5 h −1 .

11. The process according to claim 10 , in which the temperature is between 320° C. and 380° C.

12. The process according to claim 10 , in which the pressure is between 0.15 and 0.3 MPa.

13. The process according to claim 10 , in which the volumetric flow rate is between 1 and 4 h −1 .

Assignees

• Ifp Energies Now
• Michelin & Cie

Inventors

• Cadran Nicolas
• Chaumonnot Alexandra

Classifications

• B01J21/08

  Silica · CPC title

• B01J37/10

  in the presence of water, e.g. steam · CPC title

• B01J37/036

  to form a gel or a cogel · CPC title

• C07C2523/06

  of zinc, cadmium or mercury · CPC title

• B01J37/0203

  the impregnation liquid containing organic compounds · CPC title