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

Patent metadata

Field	Value
Publication number	US-10059652-B2
Application number	US-201414914421-A
Country	US
Kind code	B2
Filing date	Aug 29, 2014
Priority date	Aug 30, 2013
Publication date	Aug 28, 2018
Grant date	Aug 28, 2018

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

We claim:

1. A method for preparing a diaryl carbonate, comprising: transesterifying a dialkyl carbonate with an aromatic hydroxy compound in the presence of the heterogeneous catalyst wherein the heterogeneous catalyst comprises a mixed metal oxide according to Formula (A)
Mo a V b Nb c Q d O x   (A)

wherein
Q is Cu, Sn, Mg or Cs
a is 0.1 to 5,
b is 0.5 to 6,
c is 0 to about 20,
d is 0.1 to 10, and
x is stoichiometrically required amount of oxygen to balance the metals,
wherein at least three 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 method of claim 1 , wherein the dialkyl carbonate is dimethyl carbonate; and wherein the aromatic hydroxy compound is phenol.

3. The method of claim 1 , wherein the dialkyl carbonate is diethyl carbonate; and wherein the aromatic hydroxy compound is phenol.

4. The method of claim 1 , wherein Q is Cu.

5. The method of claim 1 , wherein Q is Cs.

6. The method of claim 1 , wherein Q is Mg.

7. The method of claim 1 , wherein Q is Sn.

8. The method of claim 1 , wherein the heterogeneous catalyst comprises a Mo—V—Cu 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, or a combination thereof.

9. The method of claim 1 , wherein the heterogeneous catalyst further comprises a binder and is prepared in the form of an extrudate.

10. The method of claim 9 , 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.

11. The method of claim 9 , wherein the binder is silica, silica-based clay, magnesium aluminum silicate clay, alumina, or a combination thereof.

12. The method of claim 1 , wherein the heterogeneous catalyst further comprises a lubricant and is prepared in the form of a tablet.

13. The method of claim 12 , 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 method of claim 12 , wherein the heterogeneous catalyst further comprises a binder and wherein the binder is silica, silica-based clay, magnesium aluminum silicate clay, alumina, or a combination thereof.

Assignees

• Sabic Global Technologies Bv

Inventors

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

Classifications

• C07C69/96 Primary

  Esters of carbonic or haloformic acids · CPC title

• C07C68/06

  from organic carbonates · CPC title

• B01J2523/00

  Constitutive chemical elements of heterogeneous catalysts · CPC title

• B01J27/199

  with chromium, molybdenum, tungsten or polonium · CPC title

• B01J23/8993

  with chromium, molybdenum or tungsten · CPC title