Synthetic method and synthetic system

Patent metadata

Field	Value
Publication number	US-12320023-B2
Application number	US-202117482902-A
Country	US
Kind code	B2
Filing date	Sep 23, 2021
Priority date	Sep 25, 2018
Publication date	Jun 3, 2025
Grant date	Jun 3, 2025

Abstract

Provided is a synthesis method comprising a first step of producing a carbonate compound from carbon monoxide and an alcohol-based compound at an anode of a first electrochemical cell comprising a cathode and the anode, and a second step of synthesizing a first product by a dealcoholization reaction of the carbonate compound, wherein an alcohol-based compound eliminated in the second step is recycled in the first step.

First claim

The invention claimed is:

1. A synthesis system comprising:
a first electrochemical cell comprising a cathode and an anode, wherein the anode comprises a catalyst that catalyzes a reaction for production of an organic carbonate compound from carbon monoxide and an alcohol-based compound (1);
a first gas feed line that feeds carbon monoxide to the side of the anode of the first electrochemical cell;
a first reactor that produces a first product by a dealcoholization reaction of the organic carbonate compound;
a circulation line configured so as to enable the organic carbonate compound produced at the side of the anode of the first electrochemical compartment to be fed to the first reactor and enable an alcohol-based compound eliminated in the first reactor to be fed to the side of the anode of the first electrochemical cell; and
a second gas feed line that feeds carbon dioxide to the side of the cathode of the first electrochemical cell,
wherein the cathode of the first electrochemical cell comprises a catalyst that reduces carbon dioxide to carbon monoxide,
wherein the catalyst comprised by the cathode is a carbon compound containing nitrogen and a metal element,

wherein the first gas feed line is a connecting path that connects the side of the cathode of the first electrochemical cell to the side of the anode thereof,
wherein the alcohol-based compound (1) comprises the alcohol-based compound eliminated in the first reactor, and
wherein the alcohol-based compound (1) is represented by the following general formula (1)
ROH  (1)

wherein R represents an organic group having 1 to 15 carbon atoms and R is selected from the group consisting of hydrocarbon group and hydrocarbon group having at least one of hydroxyl group and ether bond, the number of the hydroxyl groups in R being one in the case where R is the hydrocarbon group having at least the hydroxyl group.

2. The synthesis system according to claim 1 , comprising:
a second reactor that produces a second product by a dealcoholization reaction of the first product produced in the first reactor; and
a feed pathway that feeds an alcohol-based compound eliminated in the second reactor, to the side of the anode of the first electrochemical cell.

3. The synthesis system according to claim 1 , comprising:
a second electrochemical cell comprising a cathode and an anode, wherein the cathode comprises a catalyst that reduces carbon dioxide to carbon monoxide; and
a third gas feed line that feeds carbon dioxide to the side of the cathode of the second electrochemical cell,
wherein the first gas feed line is a connecting path that connects the side of the cathode of the second electrochemical cell and the side of the anode of the first electrochemical cell.

4. The synthesis system according to claim 1 , wherein the second gas feed line feeds the carbon dioxide in a gas phase, the carbon dioxide in the gas phase is reduced to carbon monoxide in a gas phase on the cathode, and the first gas feed line allows the carbon monoxide to flow out to the side of the anode in the gas phase.

5. The synthesis system according to claim 1 , wherein the metal element is selected from the group consisting of Sb, Bi, Sn, Pb, Ni, Ru, Co, Rh, Cu, Ag, Mn, Fe, and Zn.

6. The synthesis system according to claim 1 , wherein the metal element is selected from the group consisting of Co and Ag.

7. The synthesis system according to claim 4 , wherein the metal element is selected from the group consisting of Sb, Bi, Sn, Pb, Ni, Ru, Co, Rh, Cu, Ag, Mn, Fe, and Zn.

8. The synthesis system according to claim 4 , wherein the metal element is selected from the group consisting of Co and Ag.

Assignees

• Sekisui Chemical Co Ltd

Inventors

• Fujinuma Naohiro
• Shinmei Kenichi

Classifications

• C25B15/087

  Recycling of electrolyte to electrochemical cell · CPC title

• C25B15/081

  Supplying products to non-electrochemical reactors that are combined with the electrochemical cell, e.g. Sabatier reactor · CPC title

• C25B9/70

  Assemblies comprising two or more cells · CPC title

• C25B3/07

  Oxygen containing compounds · CPC title

• C25B1/23

  Carbon monoxide or syngas · CPC title