Electrode pitch and preparation method thereof

Abstract

The invention provides a method for preparing an electrode pitch by using direct coal liquefaction residues as a raw material. The method comprises the following steps: 1, extracting the direct coal liquefaction residues by using an organic solvent to obtain extracted pitch; and 2, processing the extracted pitch in inert atmosphere at 350-420DEG C to obtain the electrode pitch. The softening point of the electrode pitch is 90-120DEG C, the QI content of the electrode pitch is lower than 0.2%, and the coking value of the electrode pitch is greater than 50%. The invention provides the cheap electrode pitch prepared by using the cheap direct coal liquefaction residues as a raw material, and the preparation method thereof.

Description

technical field

[0001] The invention relates to an electrode pitch and a preparation method thereof, more specifically, to a method for preparing electrode pitch by using coal direct liquefaction residue as a raw material and the electrode pitch obtained therefrom. Background technique

[0002] Coal direct liquefaction residue is a by-product other than oil produced by hydrogenation in the process of direct coal liquefaction. Although the composition of the residue varies depending on the liquefaction method, it is generally divided into organic matter and inorganic matter. Organic matter is generally condensed aromatic structural units and partially hydrogenated hydrogenated aromatic structures, and contains a series of normal alkanes in the form of side chains of aromatic structural units. Inorganic substances are generally inorganic substances in unreacted coal and catalysts for direct coal liquefaction. The coal direct liquefaction residue is the coal direct liquefacti...

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