Method for producing hydrogen

Patent metadata

Field	Value
Publication number	US-2024351867-A1
Application number	US-202218685584-A
Country	US
Kind code	A1
Filing date	Aug 9, 2022
Priority date	Aug 24, 2021
Publication date	Oct 24, 2024
Grant date	—

Abstract

The present invention relates to a method for producing hydrogen, in which hydrogen is generated from a formate using a metal catalyst in the presence of a solvent by a two-phase system reaction in which the solvent is present in a state where an organic phase and an aqueous phase are separated.

First claim

1 . A method for producing hydrogen, wherein
hydrogen is generated from a formate using a metal catalyst in the presence of a solvent by a two-phase system reaction in which the solvent is present in a state where an organic phase and an aqueous phase are separated.

2 . The method for producing hydrogen according to claim 1 , wherein
a phase transfer catalyst is used for the reaction.

3 . The method for producing hydrogen according to claim 2 , wherein
the phase transfer catalyst is a quaternary ammonium salt.

4 . The method for producing hydrogen according to claim 1 , wherein
the metal catalyst contains at least one metal selected from ruthenium, iridium, iron, nickel, and cobalt.

5 . The method for producing hydrogen according to claim 1 , wherein
the metal catalyst is at least one selected from a ruthenium complex represented by the following general formula (1), a tautomer or stereoisomer thereof, and a salt compound of the complex, tautomer or stereoisomer:

(in the general formula (1), R 0 represents a hydrogen atom or an alkyl group, Q 1 each independently represents CH 2 , NH or O, R 1 each independently represents an alkyl group or an aryl group (when Q 1 represents NH or O, at least one of R 1 represents an aryl group), A each independently represents CH, CR 5 or N, R 5 represents an alkyl group, an aryl group, an aralkyl group, an amino group, a hydroxy group, or an alkoxy group, X represents a halogen atom, n represents 0 to 3, and when more than one L are present, L each independently represents a neutral or anionic ligand.)

6 . The method for producing hydrogen according to claim 1 , wherein
the formate is a sodium formate or a potassium formate.

7 . The method for producing hydrogen according to claim 1 , wherein
the organic phase contains at least one selected from toluene, dioxane, tetrahydrofuran, ethyl acetate, methylcyclohexane, and cyclopentyl methyl ether.

8 . The method for producing hydrogen according to claim 2 , wherein
the formate is a sodium formate or a potassium formate.

9 . The method for producing hydrogen according to claim 3 , wherein
the formate is a sodium formate or a potassium formate.

10 . The method for producing hydrogen according to claim 4 , wherein
the formate is a sodium formate or a potassium formate.

11 . The method for producing hydrogen according to claim 5 , wherein
the formate is a sodium formate or a potassium formate.

12 . The method for producing hydrogen according to claim 2 , wherein
the organic phase contains at least one selected from toluene, dioxane, tetrahydrofuran, ethyl acetate, methylcyclohexane, and cyclopentyl methyl ether.

13 . The method for producing hydrogen according to claim 3 , wherein
the organic phase contains at least one selected from toluene, dioxane, tetrahydrofuran, ethyl acetate, methylcyclohexane, and cyclopentyl methyl ether.

14 . The method for producing hydrogen according to claim 4 , wherein
the organic phase contains at least one selected from toluene, dioxane, tetrahydrofuran, ethyl acetate, methylcyclohexane, and cyclopentyl methyl ether.

15 . The method for producing hydrogen according to claim 5 , wherein
the organic phase contains at least one selected from toluene, dioxane, tetrahydrofuran, ethyl acetate, methylcyclohexane, and cyclopentyl methyl ether.

Assignees

• Nitto Denko Corp

Inventors

• Hirano Makoto
• Matsuda Hirokazu

Classifications

• B01J31/0239

  Quaternary ammonium compounds · CPC title

• B01J2531/985

  in a water / organic solvent system · CPC title

• B01J31/2409

  with more than one complexing phosphine-P atom · CPC title

• B01J2531/821

  Ruthenium · CPC title

• B01J2531/0244

  Pincer-type complexes, i.e. consisting of a tridentate skeleton bound to a metal, e.g. by one to three metal-carbon sigma-bonds · CPC title