Methods for producing metal carbide and hydrocarbon, and carboncontaining member

Patent metadata

Field	Value
Publication number	US-2026035826-A1
Application number	US-202519355135-A
Country	US
Kind code	A1
Filing date	Oct 10, 2025
Priority date	Apr 12, 2023
Publication date	Feb 5, 2026
Grant date	—

Abstract

A method for producing a metal carbide, including electrode preparation that includes preparing a first molten salt containing at least one first metal ion selected from alkali metal ions or alkali earth metal ions, and a carbonate ion, and applying a voltage to the first molten salt to precipitate a precipitate containing carbon on a first electrode, thereby obtaining a second electrode; and electrolysis that includes applying a voltage to a second molten salt containing at least one second metal ion selected from alkali metal ions or alkali earth metal ions using the second electrode to obtain a carbide composition containing a carbide of the second metal.

First claim

1 . A method for producing a metal carbide, comprising:
electrode preparation comprising: preparing a first molten salt containing at least one first metal ion selected from the group consisting of alkali metal ions and alkali earth metal ions, and a carbonate ion, and applying a voltage to the first molten salt to precipitate a precipitate containing carbon on a first electrode, thereby obtaining a second electrode; and electrolysis comprising applying a voltage to a second molten salt containing at least one second metal ion selected from the group consisting of alkali metal ions and alkali earth metal ions using the second electrode to obtain a carbide composition containing a carbide of the second metal.

2 . The method for producing a metal carbide according to claim 1 , wherein the first electrode contains at least one selected from the group consisting of a transition metal and an alloy containing a transition metal.

3 . The method for producing a metal carbide according to claim 1 , wherein the first electrode contains an alloy containing iron.

4 . The method for producing a metal carbide according to claim 1 , wherein the first electrode contains SUS304.

5 . The method for producing a metal carbide according to claim 1 , wherein the second molten salt is substantially free from carbonate ions.

6 . The method for producing a metal carbide according to claim 1 , wherein, in the electrolysis, the first molten salt used in the electrode preparation is used as it is as the second molten salt.

7 . The method for producing a metal carbide according to claim 1 , wherein the second molten salt contains at least one selected from the group consisting of a halide ion and an oxide ion as an anion.

8 . The method for producing a metal carbide according to claim 1 , wherein the first metal ion and the second metal ion are the same.

9 . The method for producing a metal carbide according to claim 1 , wherein the carbide composition further contains at least one selected from the group consisting of carbon, a simple substance, a halide, a carbonate, an oxide, a hydride, and a peroxide of the second metal, and a simple substance, a halide, a carbonate, an oxide, and a carbide of the first metal.

10 . The method for producing a metal carbide according to claim 1 , wherein the second molten salt contains at least one selected from the group consisting of a sodium ion, a lithium ion, and a potassium ion, and a calcium ion, as the second metal ion.

11 . A method for producing a hydrocarbon, comprising:
electrode preparation comprising:
preparing a first molten salt containing at least one first metal ion selected from the group consisting of alkali metal ions and alkali earth metal ions, and a carbonate ion derived from carbon dioxide, and
applying a voltage to the first molten salt to precipitate a precipitate containing carbon on a first electrode, thereby obtaining a second electrode;
electrolysis comprising applying a voltage to a second molten salt containing at least one second metal ion selected from the group consisting of alkali metal ions and alkali earth metal ions using the second electrode to obtain a carbide composition containing a carbide of the second metal; and gas generation comprising hydrolyzing the carbide of the second metal to obtain gas containing a hydrocarbon.

12 . The method for producing a hydrocarbon according to claim 11 , wherein the hydrocarbon is acetylene.

13 . The method for producing a hydrocarbon according to claim 11 , wherein the gas comprises acetylene as the hydrocarbon, and further comprises at least one selected from the group consisting of ethylene, ethane, methane, methylacetylene, propylene, butene, and hydrogen.

14 . A carbon-containing member comprising:
a base; a metal carbide layer covering at least a part of the base and containing a carbide of at least one second metal selected from the group consisting of alkali metals and alkali earth metals; and a carbon layer covering at least a part of the metal carbide layer, containing carbon, and being substantially free from the second metal carbide.

Assignees

• Daikin Ind Ltd
• The Doshisha

Inventors

• Goto Takuya
• Suzuki Yuta
• Watanabe Takashi
• Isogai Tomohiro
• Yamauchi Akiyoshi
• Kishikawa Yosuke

Classifications

• C25D9/08 Primary

  by cathodic processes · CPC title

• C10H19/00

  Other acetylene gas generators · CPC title

• C10H21/10

  Carbide compositions · CPC title

• C25B9/09

  Fused bath cells · CPC title

• C25B9/70

  Assemblies comprising two or more cells · CPC title