Heterogeneous catalysts for the transesterification of aromatic alcohols; and methods of making and use thereof

Patent metadata

Field	Value
Publication number	US-2016207872-A1
Application number	US-201414914421-A
Country	US
Kind code	A1
Filing date	Aug 29, 2014
Priority date	Aug 30, 2013
Publication date	Jul 21, 2016
Grant date	—

Abstract

Disclosed herein are new mixed metal oxide catalysts suitable as heterogeneous catalysts for catalyzing the transesterification process of aromatic alcohols with a dialkyl carbonate to form aromatic carbonates. The heterogeneous catalyst comprises a combination of two, three, four, or more oxides of Mo, V, Nb, Ce, Cu, Sn, or an element selected from Group IA or Group IIA of the periodic table.

First claim

I/we claim:

1 . A heterogeneous catalyst comprising a mixed metal oxide according to Formula (A)
Mo a V b Nb c Q d O x   (A)
wherein Q is Ce, Cu, Sn, an element selected from Group IA of the periodic table, or an element selected from Group IIA of the periodic table, a is 0 to about 20, b is 0 to about 20, c is 0 to about 20, d is 0 to about 20, and x is stoichiometrically required amount of oxygen to balance the metals, wherein at least two of a, b, c, and d independently is greater than 0, and with the proviso that Formula (A) excludes CuV 2 O 6 , Cu 2 V 2 O 7 , MoO 3 —V 2 O 5 , and Nb 2 O 5 —V 2 O 3 .

2 . The heterogeneous catalyst of claim 1 , wherein Q is Cu.

3 . The heterogeneous catalyst of claim 1 , wherein Q is Ce.

4 . The heterogeneous catalyst of claim 1 , wherein Q is Cs.

5 . The heterogeneous catalyst of claim 1 , wherein Q is Mg.

6 . The heterogeneous catalyst of claim 1 , wherein Q is Sn.

7 . The heterogeneous catalyst of claim 1 , wherein Q is an element selected from Group IA of the periodic table; or wherein Q is an element selected from Group IIA of the periodic table.

8 . (canceled)

9 . The heterogeneous catalyst of claim 1 , comprising a Mo—V—Cu oxide, a Mo—V—Nb oxide, a Mo—V—Nb—Cu oxide, a Mo—V—Nb—Cs oxide, a Mo—V—Nb—Mg oxide, a Mo—V—Nb—Sn oxide, a Mo—V—Nb—Ce oxide, or a combination comprising at least one of the foregoing.

10 . The heterogeneous catalyst of claim 1 , further comprising a porous solid support, and wherein the porous solid support is SiO 2 , ZrO 2 , Al 2 O 3 , or TiO 2 .

11 . (canceled)

12 . The heterogeneous catalyst of claim 1 , further comprising a binder and prepared in the form of an extrudate; or further comprising a lubricant and prepared in the form of a tablet.

13 . The heterogeneous catalyst of claim 12 , wherein the binder is present in the extrudate in an amount of about 10 to about 90 wt. % (dry basis) of the total weight of the extrudate;
or wherein the lubricant is present in the tablet in an amount of about 1 to about 5 wt. % of the total weight of the tablet.

14 . The heterogeneous catalyst of claim 12 , wherein the binder is silica, silica-based clay, magnesium aluminum silicate clay, alumina, or a combination comprising at least one of the foregoing.

15 . The heterogeneous catalyst of claim 1 , wherein at least three of a, b, c, and d independently is greater than 0.

16 . A method for preparing a heterogeneous catalyst comprising the mixed metal oxide of claim 1 , comprising preparing the mixed metal oxide according to Formula (A) by dissolution and spray drying or a coprecipitation process, an impregnation process, or a combination comprising at least one of the foregoing processes.

17 . A method for preparing a diaryl carbonate, comprising: transesterifying a dialkyl carbonate with an aromatic hydroxy compound in the presence of the heterogeneous catalyst of claim 1 .

18 . The method of claim 17 , wherein the dialkyl carbonate is dimethyl carbonate; and wherein the aromatic hydroxy compound is phenol.

19 . The method of claim 17 , wherein the dialkyl carbonate is diethyl carbonate; and wherein the aromatic hydroxy compound is phenol.

20 . A diaryl carbonate prepared by the method of claim 17 .

21 . The diaryl carbonate of claim 20 , wherein the diaryl carbonate is diphenyl carbonate.

22 . The use of the heterogeneous catalyst of claim 1 , in a transesterification reaction of a dialkyl carbonate with an aromatic hydroxy compound to produce a diaryl carbonate.

Assignees

• Sabic Global Technologies Bv

Inventors

• Ramachandran Nair Balamurali Krishna
• Mamedov Edouard
• Lawyer-Harvey Pamela
• Kulkarni Neeta
• Banke Jonathan

Classifications

• B01J37/0236

  Drying, e.g. preparing a suspension, adding a soluble salt and drying · CPC title

• B01J2523/00

  Constitutive chemical elements of heterogeneous catalysts · CPC title

• C07C69/96 Primary

  Esters of carbonic or haloformic acids · CPC title

• B01J23/885 Primary

  and copper · CPC title

• B01J23/22

  Vanadium · CPC title