Synthetic method and synthetic system

Patent metadata

Field	Value
Publication number	US-11193212-B2
Application number	US-201816141201-A
Country	US
Kind code	B2
Filing date	Sep 25, 2018
Priority date	Sep 25, 2018
Publication date	Dec 7, 2021
Grant date	Dec 7, 2021

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 method comprising:
a first step of producing a carbonate compound from carbon monoxide and an alcohol-based compound at a side of an anode of a first electrochemical cell comprising a cathode and the anode, wherein a voltage is applied between the 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,
wherein carbon dioxide is fed to a side of the cathode of the first electrochemical cell, and
wherein at least a part of the carbon monoxide used in the first step is produced by reduction of the carbon dioxide at the side of the cathode of the first electrochemical cell.

2. The synthesis method according to claim 1 , wherein the carbonate compound is at least one selected from the group consisting of dimethyl carbonate, diethyl carbonate, ethylene carbonate, dipropyl carbonate, propylene carbonate, ethyl methyl carbonate, methyl propyl carbonate, ethyl propyl carbonate and diphenyl carbonate.

3. The synthesis method according to claim 1 , wherein the dealcoholization reaction is a dealcoholization condensation reaction of the carbonate compound with at least one selected from the group consisting of a diol-based compound and a diamine-based compound.

4. The synthesis method according to claim 3 , wherein the first product is at least one selected from the group consisting of compounds represented by the following formulae (4-1) and (5-1):

wherein R 1 and R 2 each independently represent an organic group having 1 to 30 carbon atoms.

5. The synthesis method according to claim 3 , wherein the first product is a polymer having at least any of repeating units represented by the following formulae (4-2) and (5-2):

wherein R 1 and R 2 each independently represent an organic group having 1 to 30 carbon atoms.

6. The synthesis method according to claim 1 , wherein
the second step is performed in a first reactor,
the method further comprises a third step of synthesizing a second product by a further dealcoholization reaction of the first product in a second reactor that is a separate reactor from the first reactor, and
an alcohol-based compound eliminated in the third step is recycled in the first step.

7. The synthesis method according to claim 6 , wherein the second product is a polymer having at least any of repeating units represented by the following formulae (4-2) and (5-2):

wherein R 1 and R 2 each independently represent an organic group having 1 to 30 carbon atoms.

8. The synthesis method according to claim 1 , wherein at least a part of the carbon monoxide is produced at a side of a cathode of a second electrochemical cell that is a separate electrochemical cell from the first electrochemical cell.

9. The synthesis method according to claim 1 , further comprising allowing the carbon monoxide produced in the side of the cathode to flow out into the side of the anode through a connecting path that connects the side of the anode and the side of the cathode.

10. The synthesis method according to claim 1 , wherein the dealcoholization reaction is a dealcoholization condensation reaction of the carbonate compound with at least one bisphenol-based compound.

11. The synthesis method according to claim 1 , wherein the dealcoholization reaction is a dealcoholization condensation reaction of the carbonate compound with at least one diamine-based compound.

12. The synthesis method according to claim 1 ,
wherein the first product is synthesized in a first reactor, and
wherein the method further comprises feeding the carbonate compound produced at the side of the anode to the first reactor and the alcohol-based compound eliminated in the first reactor to the side of the anode with using a circulation line.

13. The synthesis method according to claim 12 , wherein the circulation line comprises a discharge line that discharges the carbonate compound from the side of the anode, and a feed pathway that feeds the alcohol-based compound eliminated in the first reactor to the side of the anode.

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