Method of generating organic compound and organic compound-generating system

Patent metadata

Field	Value
Publication number	US-10550484-B2
Application number	US-201614997681-A
Country	US
Kind code	B2
Filing date	Jan 18, 2016
Priority date	Jan 20, 2015
Publication date	Feb 4, 2020
Grant date	Feb 4, 2020

Abstract

The present invention provides a method of generating organic compounds and an organic-compound-generating system capable of efficiently generating organic-compounds even under a low-temperature environment by controlling a pH of an aqueous solution within a range from 5 to 10 during electrolysis in a case generating organic compounds by electrolyzing the aqueous solution containing carbon dioxide.

First claim

What is claimed is:

1. A method for generating an organic compound comprising:
generating the organic compound by electrolyzing an aqueous solution containing carbon dioxide by using a positive electrode, a negative electrode and a membrane disposed between the positive electrode and the negative electrode; wherein
the generating the organic compound comprises:
providing the aqueous solution containing carbon dioxide to the positive electrode and the negative electrode in an electrolytic cell,
controlling a pH of the aqueous solution within a range from 5 to 10 during an electrolysis; and
applying a voltage between the positive electrode and the negative electrode during the electrolysis, wherein
the aqueous solution is provided directly as an electrolyte into the positive electrode and the negative electrode in the electrolytic cell; and
the electrolytic cell further comprises the membrane disposed between the positive electrode and the negative electrode.

2. The method of generating organic compound according to claim 1 , further comprising:
absorbing carbon dioxide in water in a generation vessel so that the aqueous solution is generated;
transferring the aqueous solution from the generation vessel to the electrolytic cell independent from the generation vessel; and
electrolyzing the aqueous solution in the electrolytic cell, wherein
the pH of the aqueous solution is controlled so as to be within the range from 5 to 10 in the generation vessel.

3. The method of generating organic compound according to claim 2 , wherein during electrolysis, the aqueous solution in the electrolytic cell is made to flow.

4. The method of generating organic compound according to claim 1 , wherein the pH of the aqueous solution is controlled so as to be within the range from 5 to 10 during the electrolysis by adding a basic substance in the aqueous solution.

5. The method of generating organic compound according to claim 1 ,
wherein the positive electrode is provided as a plurality of positive electrodes;
wherein the negative electrode is provided as a plurality of negative electrodes,
wherein the plurality of positive electrodes and the plurality of negative electrodes are respectively provided with an aperture so that an aperture ratio is within the range from 25% to 50%, and
wherein the aperture ratio is a ratio of the total areas of aperture to the external projected area of-the positive electrodes and the negative electrodes.

6. The method of generating organic compound according to claim 1 ,
wherein an inter-electrode-space distance is set within the range from 0.8 mm to 1.4 mm, and
wherein the inter-electrode-space distance means a distance obtained by subtracting the thickness of the membrane from the distance between the positive electrode and the negative electrode.

Assignees

• Chiyoda Corp
• Univ Tokyo

Inventors

• Takeda Dai
• Mutou Akihiro
• Hashimoto Chikako
• Matsumoto Jun
• Fujii Katsushi
• Sugiyama Masakazu

Classifications

• C25B15/02

  Process control or regulation · CPC title

• C25B3/04 Primary

  Chemistry & Metallurgy · mapped topic

• C25B9/06

  Chemistry & Metallurgy · mapped topic

• C25B9/73

  of the filter-press type · CPC title

• C25B15/08 Primary

  Supplying or removing reactants or electrolytes; Regeneration of electrolytes · CPC title