Method for producing carbonate esters, and catalytic structure for producing carbonate esters

Patent metadata

Field	Value
Publication number	US-12459884-B2
Application number	US-201917257730-A
Country	US
Kind code	B2
Filing date	Jul 8, 2019
Priority date	Jul 10, 2018
Publication date	Nov 4, 2025
Grant date	Nov 4, 2025

Abstract

Provided are a method for producing carbonate esters, and a catalytic structure for producing carbonate esters, whereby solid catalyst powder formation and detachment are suppressed and superior carbonate ester reaction efficiency is yielded when a catalytic structure constituted by a sufficient quantity of a cerium-oxide-containing solid catalyst supported on a substrate is used. The method for producing carbonate esters includes reacting a monohydric alcohol and carbon dioxide in the presence of a catalytic structure and a hydrating agent. The catalytic structure includes a substrate and a catalytic layer that is formed on at least a portion of the surface of the substrate and contains a solid catalyst and an inorganic binder. The solid catalyst contains cerium oxide. The supported quantity of the solid catalyst is 15 g/m 2 to 200 g/m 2 , inclusive. The inorganic binder contains silica and/or alumina.

First claim

The invention claimed is:

1 . A method for producing a carbonate ester, comprising allowing a monohydric alcohol and carbon dioxide to react with each other in the presence of a catalytic structure and a hydration agent to produce a carbonate ester, wherein:
the catalytic structure comprises a base material, and a catalytic layer which is formed on at least a part of the surface of the base material and which contains a solid catalyst and an inorganic binder; the solid catalyst contains cerium oxide; the amount of the supported solid catalyst is 15 g/m 2 to 200 g/m 2 ; and the inorganic binder contains silica and/or alumina; wherein the catalytic structure further comprises an intermediate layer consisting of the inorganic binder, formed between the catalytic layer and the base material, wherein the average thickness of the catalytic layer is 12 μm-180 μm.

2 . The method for producing a carbonate ester according to claim 1 , wherein the inorganic binder contains silica.

3 . The method for producing a carbonate ester according to claim 1 , wherein the amount of the supported solid catalyst is 15 g/m 2 to 150 g/m 2 .

4 . The method for producing a carbonate ester according to claim 1 , wherein the amount of the supported solid catalyst is 15 g/m 2 to 70 g/m 2 .

5 . The method for producing a carbonate ester according to claim 1 , wherein the base material has through-holes that serve as flow paths for the monohydric alcohol and carbon dioxide, and
the catalytic layer is formed on the surface of the through-holes.

6 . The method for producing a carbonate ester according to claim 1 , wherein the solid catalyst further contains an oxide of a rare-earth element.

7 . The method for producing a carbonate ester according to claim 6 , wherein the solid catalyst contains lanthanum oxide.

8 . The method for producing a carbonate ester according to claim 1 , wherein the base material is a metal honeycomb.

9 . The method for producing a carbonate ester according to claim 1 , wherein the hydration agent contains a nitrile compound.

10 . The method for producing a carbonate ester according to claim 1 , wherein the hydration agent contains 2-cyanopyridine.

Assignees

• Nippon Steel Corp
• Mitsubishi Gas Chemical Co
• Nippon Steel Eng Co Ltd

Inventors

• Suzuki Kimihito
• Shinkai Yousuke
• Liu Hongyu
• Harada Hidefumi
• Kato Yuzuru
• Morita Kentaro
• OHASHI Asuka

Classifications

• B01J23/10

  of rare earths · CPC title

• B01J21/08

  Silica · CPC title

• B01J37/0244

  Coatings comprising several layers · CPC title

• B01J37/0225

  of metal substrates · CPC title

• B01J37/0009

  Use of binding agents; Moulding; Pressing; Powdering; Granulating; Addition of materials ameliorating the mechanical properties of the product catalyst · CPC title