Silicon trapping mass

Patent metadata

Field	Value
Publication number	US-12420257-B2
Application number	US-202118267965-A
Country	US
Kind code	B2
Filing date	Dec 9, 2021
Priority date	Dec 21, 2020
Publication date	Sep 23, 2025
Grant date	Sep 23, 2025

Abstract

The present invention relates to a mass for trapping silicon compounds, comprising a porous alumina-based support and at least one metal chosen from the metals from groups VIB and VIIIB, and exhibiting a grain density of at least 1.20 g/ml, a specific surface of at least 300 m 2 /g and pores with a mean size of less than 6.5 nm, as determined by mercury porosimetry. The present invention also relates to a process for the preparation of said trapping mass and to a trapping process using said trapping mass.

First claim

The invention claimed is:

1. A mass for trapping silicon compounds, comprising:
a porous alumina-based support and at least one metal chosen from the metals from groups VIB and VIIIB,
wherein the porous support exhibits a grain density of at least 1.20 g/ml, a specific surface of at least 300 m 2 /g, and pores with a mean size of less than 6.5 nm, as determined by mercury porosimetry.

2. The trapping mass as claimed in claim 1 , wherein the trapping mass exhibits a grain density of at least 1.25 g/ml.

3. The trapping mass as claimed in claim 1 , wherein the trapping mass exhibits a specific surface of at least 310 m 2 /g.

4. The trapping mass as claimed in claim 1 , wherein the trapping mass exhibits pores with a mean size of less than or equal to 6.0 nm.

5. The trapping mass as claimed in claim 1 , wherein the trapping mass exhibits a monomodal pore size distribution.

6. The trapping mass as claimed claim 1 , wherein the trapping mass exhibits a content of less than 10% by weight of metal from group VIB, expressed as oxide, and/or a content of less than 5% by weight of metal from group VIIIB, expressed as oxide.

7. The trapping mass as claimed in claim 1 , wherein the trapping mass exhibits a content of less than 15% by weight of P, expressed as oxide P 2 O 5 .

8. The trapping mass as claimed in claim 1 , wherein the trapping mass exhibits a total pore volume of between 0.15 cm 3 /g and 0.6 cm 3 /g.

9. A process for the preparation of a mass for trapping silicon compounds, comprising the following stages:
a) providing a porous alumina-based support exhibiting a grain density of at least 1.15 g/ml, a specific surface of at least 330 m 2 /g and pores with a mean size of less than 6.5 nm, as determined by mercury porosimetry;
b) preparing an aqueous solution containing at least one dissolved metal M precursor, the metal M being chosen from the metals from groups VIB and VIIIB;
c) impregnating the porous support resulting from stage a) with the solution obtained in stage b);
d) maturing the impregnated support resulting from stage c); and
e) drying the matured, impregnated support resulting from stage d).

10. The preparation process as claimed in claim 9 , wherein the porous support exhibits a grain density of at least 1.20 g/ml.

11. The preparation process as claimed in claim 9 , wherein the porous support exhibits a specific surface of at least 340 m 2 /g.

12. The preparation process as claimed in claim 9 , wherein the porous support exhibits pores with a mean size of less than or equal to 6.0 nm.

13. The preparation process as claimed in claim 9 , wherein the trapping mass comprises a porous alumina-based support and at least one metal chosen from the metals from groups VIB and VIIIB, and the porous support exhibits a grain density of at least 1.20 g/ml, a specific surface of at least 300 m 2 /g, and pores with a mean size of less than 6.5 nm.

14. A process for trapping silicon compounds in a gaseous or liquid feedstock, comprising bringing the feedstock into contact with a trapping mass as claimed in claim 1 .

15. The trapping process as claimed in claim 14 , wherein the contacting of the feedstock with the trapping mass is carried out at a temperature of between 20° C. and 500° C., an absolute pressure of between 0.1 MPa and 20 MPa, and a liquid hourly space velocity of between 0.1 h −1 and 50 h −1 or a gas hourly space velocity of between 10 h −1 and 5000 h −1 .

16. The trapping mass as claimed in claim 1 , wherein content of metal from group VIB, expressed as oxide, is between 0.1% and 10% by weight, with respect to the total weight of the trapping mass.

17. The trapping mass as claimed in claim 1 , wherein the content of metal from group VIIIB, expressed as oxide, is between 0.01% and 5% by weight, with respect to the total weight of the trapping mass.

18. The trapping mass as claimed in claim 1 , wherein the trapping mass exhibits a content of P, expressed as oxide P 2 O 5 , of between 0.1% and 15% by weight, with respect to the total weight of the trapping mass.

19. The trapping mass as claimed in claim 1 , wherein the trapping mass exhibits a specific surface of between 310 m 2 /g and 400 m 2 /g.

20. The trapping mass as claimed in claim 1 , wherein the trapping mass exhibits a grain density of between 1.25 g/ml and 1.60 g/ml.

Assignees

• Ifp Energies Now

Inventors

• Legagneux Nicolas
• Marion Marie-Claire
• Barthelet Karin
• Euzen Patrick
• Lopez Joseph

Classifications

• B01J20/28083

  being in the range 2-50 nm, i.e. mesopores · CPC title

• C10G2400/02

  Gasoline · CPC title

• C10G2300/104

  Light gasoline having a boiling range of about 20 - 100 °C · CPC title

• C10G25/05

  Removal of non-hydrocarbon compounds, e.g. sulfur compounds · CPC title

• B01J20/2809

  Monomodal or narrow distribution, uniform pores · CPC title