Refine Holdings Co., Ltd.

Mitsuhiro Iwafune

Masaru Nakajo

Tomokiyo Takeyama

Kensuke Fukasawa

Takao Suzuki

The disclosed is a method for producing a dispersion of carbonaceous material in a nonaqueous solvent comprising a nitrogen-containing heterocyclic amide compound with a solvent purity of 99.9% or higher, which comprises:

Carbonaceous material dispersion and method for producing thereof

The disclosed is a method for producing a carbon material dispersion which removes efficiently and reliably metallic components from carbon materials, and that provides a carbon material dispersion of a high product quality and stable electrical properties. The method comprises a first magnetic separation step in which the powdered and/or granulated carbon material C is applied to the surface of a rotating magnetic rollto remove the metallic component M from the carbon material in the dry state of the powdered and granulated carbon material C; and a second magnetic separation step in which a magnet elementis placed in a carbon material dispersion D, in which the carbon material from which the metallic component has been removed in the first magnetic separation step is dispersed in a dispersing medium, in advance of the second magnetic separation step.

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Tokyo, Japan

Mitsuhiro Iwafune