Mesoporous silica manufactured in the presence of water-soluble odso

Patent metadata

Field	Value
Publication number	US-2023286815-A1
Application number	US-202318318796-A
Country	US
Kind code	A1
Filing date	May 17, 2023
Priority date	Jun 14, 2021
Publication date	Sep 14, 2023
Grant date	—

Abstract

Mesoporous silica is disclosed possessing a two-dimensional, hexagonal, through-hole structure with a space group p6mm, that is formed using one or more water-soluble oxidized disulfide oil (ODSO) compounds during the synthesis to impart distinct characteristics including an increased percentage of silanol groups.

First claim

1 . Mesoporous silica having hexagonal p6mm symmetry formed by the process of:
mixing in an aqueous medium under conditions conducive to promote hydrolysis reactions effective quantities of
a surfactant as a soft template material to influence a silica mesoporous structure,
one or more water-soluble oxidized disulfide oil (ODSO) compounds as an acidity modifier, and
a silica source;
heating the mixture under conditions and for a time effective conducive to promote condensation reactions and to form mesoporous silica as a precipitate suspended in a supernatant as an intermediate suspension; and recovering the mesoporous silica from the intermediate suspension.

2 . The mesoporous silica as in claim 1 , wherein the mixing comprises mixing in the aqueous medium the one or more water-soluble oxidized disulfide oil (ODSO) compounds and the surfactant to influence a silica mesoporous structure to form a first mixture, mixing the silica source with the first mixture under conditions conducive to promote hydrolysis reactions and form a second mixture, and wherein heating is of the second mixture.

3 . The mesoporous silica as in claim 1 , wherein the aqueous medium is an acidic aqueous medium comprising an acid component as an additional acidity modifier.

4 . The mesoporous silica as in claim 1 , further comprising treating the mesoporous silica to remove surfactant, wherein treating comprises solvent extraction or thermal treatment.

5 . The mesoporous silica as in claim 1 , wherein the hydrolysis reactions occur at a temperature in the range of about 20-65° C., condensation reactions occur at a temperature in the range of about 80-120° C., and wherein removing surfactant is by thermal treatment at a temperature in the range of about 215-600° C.

6 . The mesoporous silica as in claim 1 , wherein the ODSO compounds include 3 or more oxygen atoms.

7 . The mesoporous silica as in claim 1 , wherein the ODSO compounds having 1 to 20 carbon atoms.

8 . The mesoporous silica as in claim 1 , wherein the ODSO compounds have an average density greater than about 1.0 g/cc.

9 . The mesoporous silica as in claim 1 , wherein the ODSO compounds have an average boiling point greater than about 80° C.

10 . The mesoporous silica as in claim 1 , wherein the ODSO compounds are selected from the group consisting of (R—SOO—SO—R′), (R—SOO—SOO—R′), (R—SO—SOO—OH), (R—SOO—SOO—OH), (R—SO—SO—OH), (R—SOO—SO—OH), and mixtures thereof, where R and R′ can be the same or different and are alkyl groups comprising 1-10 carbon atoms.

11 . The mesoporous silica as in claim 1 , wherein the silica source is selected from the group consisting of tetraethyl orthosilicate (TEOS), tetramethyl orthosilicate (TMOS), tetrapropyl orthosilicate (TPOS), tetrabutyl orthosilicate (TBOS) or sodium (meta)silicate.

12 . The mesoporous silica as in claim 1 , wherein the surfactant is a non-ionic surfactant.

13 . The mesoporous silica as in claim 1 , wherein the surfactant is a triblock copolymer of ethylene oxide/propylene oxide/ethylene oxide.

14 . The mesoporous silica as in claim 4 , wherein treating is by thermal treatment resulting in calcined mesoporous silica that possesses 0.1-65 percent more silanol groups, as a function of Q 2 and Q 3 silica, as compared to conventional SBA-15.

15 . The mesoporous silica as in claim 14 , wherein X-ray diffraction patterns show the tertiary 2 1 and 3 0 peak reflections that are more enhanced as compared conventional calcined SBA-15 mesoporous silica.

16 . Mesoporous silica having hexagonal p6mm symmetry that possesses an increased quantity of silanol groups as compared to conventional SBA-15.

17 . The mesoporous silica as in claim 16 that has been calcined and possesses 0.1-65 percent more silanol groups, as a function of Q 2 and Q 3 silica, as compared to conventional SBA-15.

18 . The mesoporous silica as in claim 17 that possesses 25-65 percent more silanol groups as compared to conventional SBA-15.

19 . The mesoporous silica as in claim 17 that possesses a 0.1-50 percent less Q 4 silica as compared to conventional SBA-15.

20 . The mesoporous silica as in claim 17 , wherein X-ray diffraction patterns show the tertiary 2 1 and 3 0 peak reflections that are more enhanced as compared conventional calcined SBA-15 mesoporous silica.

Assignees

• Saudi Arabian Oil Co

Inventors

• Hodgkins Robert Peter
• Koseoglu Omer Refa

Classifications

• C01B33/193 Primary

  of aqueous solutions of silicates · CPC title

• C01P2002/72

  by d-values or two theta-values, e.g. as X-ray diagram · CPC title

• C01P2006/16

  Pore diameter · CPC title

• C01B33/128 Primary

  by acidic treatment of aqueous silicate solutions · CPC title

• C01B33/143

  of aqueous solutions of silicates · CPC title