PURPOSE: To obtain pitch for high-quality carbonaceous material such as high- strength carbon fiber, needle coke, binder pitch, electrode material, etc., by contacting a metal-containing pitch with an ion exchange resin to remove the metallic component and separating pitch from said resin.
CONSTITUTION: A coal-based or petroleum-based pitch containing a metallic component such as iron is preferably hydrogenated in the presence of a catalyst and made to contact with a cation exchange resin of crosslinked gel-type or porous type, etc., or a chelate resin of iminodiacetic acid-type or polyamine-type, etc., to remove the metallic component. The treated pitch is separated from the ion exchange resin. The ion exchange resin used in the above process has particle diameter of preferably about 0.1W5mm and ion exchange capacity of preferably about 0.5W3meq/ml based on wet resin.
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SUEMURA KOUJI
YONEMORI TSUTOMU