Lithium carbide material

Patent metadata

Field	Value
Publication number	US-2025136533-A1
Application number	US-202418930820-A
Country	US
Kind code	A1
Filing date	Oct 29, 2024
Priority date	Oct 30, 2023
Publication date	May 1, 2025
Grant date	—

Abstract

Disclosed herein are applications for using lithium carbide materials including reducing agents, radiocarbon dating, and acetylene storage materials.

First claim

1 . A reducing agent comprising:
a solid lithium carbide compound comprising:
a plurality of lithium carbide particles comprising a Dv50 between 0.1 and 50 microns and a surface area less than 20 m 2 /g; and
wherein individual particles of the plurality of particles comprise a compound having a stoichiometry of Li x C y M z , wherein x ranges from greater than 0 to 2, y is 2, and z ranges from 0 to 2; and wherein M is an element selected from one of a transition metal, metalloid, Group 1 element, Group 2 element, Group13 element, Group15 element, or Group 17 element.

2 . A method for storing acetylene comprising:
hydrolyzing a lithium carbide material having a surface area and particle size to produce acetylene; and wherein the surface area and particle size area are proportional to a production rate of acetylene produced from the hydrolyzing; and wherein the lithium carbide material comprises a plurality of lithium carbide particles comprising a Dv50 between 0.1 and 50 microns and a surface area less than 20 m 2 /g; and wherein individual particles of the plurality of particles comprising a compound having a stoichiometry of Li x C y M z , wherein x ranges from greater than 0 to 2, y is 2, and z ranges from 0 to 2; and wherein M is an element selected from one of a transition metal, metalloid, Group 1 element, Group 2 element, Group13 element, Group15 element, or Group 17 element.

3 . A method for determining age of a carbon material comprising:
reacting the carbon material or a reaction byproduct of the carbon material with a lithium carbide material; reacting the reaction byproduct with a second intermediate material to produce a detection species; measuring concentration of the detection species; and correlating the concentration of the detection species to the age of the carbon material.

4 . The method of claim 3 , wherein the lithium carbide material comprises a plurality of lithium carbide particles comprising a Dv50 between 0.1 and 50 microns and a surface area less than 20 m 2 /g; and wherein individual particles of the plurality of particles comprising a compound having a stoichiometry of Li x C y M z , wherein x ranges from greater than 0 to 2, y is 2, and z ranges from 0 to 2; and wherein M is an element selected from one of a transition metal, metalloid, Group 1 element, Group 2 element, Group13 element, Group15 element, or Group 17 element.

5 . The method of claim 3 , wherein the byproduct is acetylene or benzene.

6 . The method of claim 3 , wherein the second intermediate material is water and the reaction byproduct is acetylene.

7 . The method of claim 4 , wherein the lithium compound is selected from lithium metal, lithium salts selected comprising lithium oxides, lithium nitrides, lithium halides, organolithium compounds, lithium alloys, and combinations thereof.

8 . The method of claim 3 , further comprising synthesizing a lithium carbide compound using one of a melt infusion method, a vapor phase method, a reduction of lithium salts method, or an electrochemical method.

Assignees

• Group14 Technologies Inc

Inventors

• Costantino Henry R
• Dhanabalan Abirami
• Sakshaug Avery J
• Rotondo Brandon
• Keller Mitchell
• Leytham Nigel

Classifications

• C07C1/328

  the hetero-atom being an alkali metal atom · CPC title

• C01P2004/61

  Micrometer sized, i.e. from 1-100 micrometer · CPC title

• C01P2006/12

  Surface area · CPC title

• C01P2004/62

  Submicrometer sized, i.e. from 0.1-1 micrometer · CPC title

• C01P2002/50

  Solid solutions · CPC title