	US 12,249,717 B2
	Carbonaceous material dispersion and method for producing thereof
Masaru Nakajo, Tokyo (JP); Mitsuhiro Iwafune, Tokyo (JP); Kensuke Fukasawa, Tokyo (JP); Takao Suzuki, Tokyo (JP); and Tomokiyo Takeyama, Tokyo (JP)
Assigned to REFINE HOLDINGS CO., LTD., Gifu (JP)
Filed by REFINE HOLDINGS CO., LTD., Gifu (JP)
Filed on Jul. 1, 2021, as Appl. No. 17/365,387.
Claims priority of application No. 2020-115485 (JP), filed on Jul. 3, 2020.
Prior Publication US 2022/0006093 A1, Jan. 6, 2022
Int. Cl. C09C 3/08 (2006.01); C09C 1/48 (2006.01); C09C 3/10 (2006.01); H01M 4/13 (2010.01); H01M 4/62 (2006.01); H01M 10/052 (2010.01)

CPC H01M 4/625 (2013.01) [C09C 1/48 (2013.01); C09C 3/08 (2013.01); C09C 3/10 (2013.01); H01M 4/13 (2013.01); H01M 10/052 (2013.01)]

15 Claims

1. A method for producing a dispersion of carbonaceous material in a nonaqueous liquid comprising a nitrogen-containing heterocyclic amide compound, wherein the nitrogen-containing heterocyclic amide compound has a purity of 99.9% or higher as measured by gas chromatography, which comprises:

confirming a concentration of amine compounds in the nonaqueous liquid to be less than 3×10⁻⁶in mass fraction;

confirming a moisture concentration in the nonaqueous liquid to be less than 5×10⁻⁴in mass fraction; and

if both the concentration of amine compounds and the moisture concentration conditions are met, dispersing a carbonaceous material in the nonaqueous liquid to obtain a carbonaceous material concentration of 15 to 30% by mass based on the total mass of the dispersion.