Methods for producing metal carbide and hydrocarbon, and carbon-containing member

Patent metadata

Field	Value
Publication number	US-2026035804-A1
Application number	US-202519353695-A
Country	US
Kind code	A1
Filing date	Oct 9, 2025
Priority date	Apr 12, 2023
Publication date	Feb 5, 2026
Grant date	—

Abstract

A method for producing a metal carbide including: preparing a molten salt containing at least one first metal ion selected from alkali metal ions or alkali earth metal ions; preparing an electrode containing carbon; and applying a voltage to the molten salt using the electrode to obtain a metal carbide composition containing a carbide of the first metal.

First claim

1 . A method for producing a metal carbide comprising:
preparing a molten salt containing at least one first metal ion selected from the group consisting of alkali metal ions and alkali earth metal ions; preparing an electrode containing carbon; and applying a voltage to the molten salt using the electrode to obtain a metal carbide composition containing a carbide of the first metal, wherein the molten salt is substantially free from carbonate ions.

2 . The method for producing a metal carbide according to claim 1 , wherein the electrode contains at least one selected from the group consisting of glassy carbon, natural graphite, isotropic carbon, highly oriented pyrolytic graphite, plastic formed carbon, and conductive diamond.

3 . The method for producing a metal carbide according to claim 1 , wherein the electrode contains highly oriented pyrolytic graphite.

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

5 . The method for producing a metal carbide according to claim 1 , wherein the molten salt contains both a halide ion and an oxide ion as the anion.

6 . The method for producing a metal carbide according to claim 4 , wherein the molten salt contains a chloride ion as the halide ion.

7 . The method for producing a metal carbide according to claim 4 , wherein the molten salt contains a fluoride ion as the halide ion.

8 . The method for producing a metal carbide according to claim 1 , wherein the metal 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 first metal.

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

10 . A method for producing a hydrocarbon, comprising:
preparing a molten salt containing at least one first metal ion selected from the group consisting of alkali metal ions and alkali earth metal ions; preparing an electrode containing carbon; applying a voltage to the molten salt using the electrode to obtain a metal carbide composition containing a carbide of the first metal; and hydrolyzing the carbide of the first metal to obtain gas containing a hydrocarbon, wherein the molten salt is substantially free from carbonate ions.

11 . The method for producing a hydrocarbon according to claim 10 , wherein the hydrocarbon is acetylene.

12 . The method for producing a hydrocarbon according to claim 10 , 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.

13 . A carbon-containing member comprising:
a base containing carbon, and a metal carbide composition supported on the base, the metal carbide composition containing a carbide of at least one first metal selected from the group consisting of alkali metals and alkali earth metals.

Assignees

• Daikin Ind Ltd
• The Doshisha

Inventors

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

Classifications

• C25B15/081

  Supplying products to non-electrochemical reactors that are combined with the electrochemical cell, e.g. Sabatier reactor · CPC title

• C25B9/09

  Fused bath cells · CPC title

• C25B1/18

  Alkaline earth metal compounds or magnesium compounds · CPC title

• C10H21/10

  Carbide compositions · CPC title

• C25B1/14 Primary

  Alkali metal compounds · CPC title