Method Of Generating Organic Compound And Organic Compound-Generating System

Patent metadata

Field	Value
Publication number	US-2016208396-A1
Application number	US-201614997681-A
Country	US
Kind code	A1
Filing date	Jan 18, 2016
Priority date	Jan 20, 2015
Publication date	Jul 21, 2016
Grant date	—

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

1 . A method for generating organic compound by electrolyzing an aqueous solution containing carbon dioxide, said method comprising:
controlling a pH of the aqueous solution within a range from 5 to 10 during an electrolysis.

2 . The method of generating organic compound according to claim 1 , further comprising:
absorbing carbon dioxide in water in a generation vessel so that aqueous solution is generated; transferring the aqueous solution from the generation vessel to an 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 the electrolysis by adding a basic substance in the aqueous solution.

5 . A system for generating organic compound, said system comprising:
an aqueous-solution-generation section generating an aqueous solution in which carbon dioxide is made to be absorbed; an electrolytic section in which the aqueous solution generated in the aqueous-solution-generation section is electrolyzed; and a pH controller controlling the pH of the aqueous solution during the electrolysis so as to be within the range from 5 to 10.

6 . The system for generating organic compound according to claim 5 , wherein
the aqueous-solution-generation section includes a generation vessel in which carbon dioxide is absorbed in water so that the aqueous solution is produced, the electrolytic section includes an electrolytic cell independent from the generation vessel, in which the aqueous solution is electrolyzed, and the pH controller controls the pH of the aqueous solution so as to be within the range from 5 to 10 in the generation vessel, and wherein the system for generating organic compound further comprises a transferring unit which transfers the aqueous solution from the generation vessel to the electrolytic cell.

7 . The system for generating organic compound according to claim 6 , further comprising a fluidity-providing section subjecting the aqueous solution in the electrolytic cell to be fluidized.

8 . The system for generating organic compound according to claim 7 , wherein
the electrolytic section includes a plurality of positive electrodes and a plurality of negative electrodes arranged alternately in the electrolytic cell and a plurality of membranes which partitions an inside of the electrolytic cell into a plurality of accommodation portions, the accommodation portions individually accommodating the plurality of positive electrodes and the plurality of negative electrodes, and is configured such that the aqueous solution is discharged from the electrolytic cell immediately after being separated into the plurality of accommodation portions and being directed in one direction as well as being passed therethrough.

9 . The system for generating organic compound according to claim 7 , wherein
the electrolytic section includes the plurality of positive electrodes and the plurality of negative electrodes arranged alternately and a plurality of membranes which partitions an inside of the electrolytic cell into a plurality of accommodation portions, the accommodation portions individually accommodating the plurality of positive electrodes and the plurality of negative electrodes, wherein the aqueous solution is directed in one direction only within the accommodation portions accommodating the plurality of negative electrodes among the plurality of accommodation portions and is discharged from the electrolytic cell immediately after being passed through the accommodation portions, and wherein another electrolyte aqueous solution separated from the aqueous solution is directed in one direction only within the accommodation portions accommodating the plurality of positive electrodes among the plurality of accommodation portions and is discharged from the electrolytic cell immediately after being passed through the accommodation portions.

10 . The system for generating organic compound according to claim 8 , wherein
the plurality of positive electrodes and the plurality of negative electrodes are respectively formed in a plate-like shape and are respectively arranged in parallel to each other, and the positive electrode and the negative electrode being adjacent to each other among the plurality of positive electrodes and the plurality of negative electrodes are adapted to each form a set consisted of a positive electrode and a negative electrode, and wherein an inter-electrode-space distance between the positive electrode and the negative electrode that form the set is equal to or less than 2.5 mm.

11 . The system for generating organic compound according to claim 10 , wherein
one plurality of electrodes of at least one of the plurality of positive electrodes and the plurality of negative electrodes is provided with one or more apertures.

12 . The system for generating organic compound according to claim 5 , wherein
the pH controller is adapted to control the pH of the aqueous solution within the range from 5 to 10 by adding a basic substance in the aqueous solution during the electrolysis.

13 . The system for generating organic compound according to claim 5 , further comprising an organic-compound-extraction apparatus adapted to extract organic compounds, wherein
the organic-compound-extraction apparatus comprises at least one of the gaseous-organic-compound-extraction section and the liquid-organic-compound-extraction section, and wherein the gaseous-organic-compound-extraction section extracts organic compounds contained in gases generated by the electrolysis conducted by the electrolytic section, and the liquid-organic-compound-extraction section extracts organic compounds contained in the aqueous solution on which the electrolysis has been conducted.

14 . The system for generating organic compound according to claim 13 , wherein
the organic-compound-extraction apparatus comprises the liquid-organic-compound-extraction section, and wherein the system for generating organic compound further comprises a liquid-delivering section that delivers the aqueous solution from which the organic compound has been extracted by the liquid-organic-compound-extraction section to the aqueous-solution-generation section.

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

• C25B9/06

  Chemistry & Metallurgy · mapped topic

• C25B3/04 Primary

  Chemistry & Metallurgy · mapped topic

• C25B3/25 Primary

  Reduction · CPC title

• C25B15/08 Primary

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