Title:
PRODUCTION OF ISOTROPIC PITCH
Document Type and Number:
Japanese Patent JPH0834977
Kind Code:
A
Abstract:
PURPOSE: To produce an optically isotropic pitch substantially not containing an optically anisotropic structure and improved in infusibility.
CONSTITUTION: This method for production of an optically isotropic pitch is carried out by adding 1 to 10wt.% aromatic nitro compound to a coal-based heavy oil, heat-treating the resultant mixture at 150 to 400°C for 1 to 120min to obtain a modified material, dissolving the resultant modified material in a monocyclic aromatic hydrocarbon solvent, removing deposited insoluble components, recovering the solvent from the prepared solution to obtain soluble components and heat-treating the soluble components.
Inventors:
TSUCHITANI MASATOSHI
NAITO SAKAE
NAKAJIMA RYOICHI
SATO TOMOHIKO
NAITO SAKAE
NAKAJIMA RYOICHI
SATO TOMOHIKO
Application Number:
JP19215794A
Publication Date:
February 06, 1996
Filing Date:
July 23, 1994
Export Citation:
Assignee:
MARUZEN PETROCHEM CO LTD
International Classes:
C10C3/02; C10C3/04; C10C3/08; C10C3/10; D01F9/155; (IPC1-7): C10C3/02; C10C3/04; C10C3/08; C10C3/10; D01F9/155
Attorney, Agent or Firm:
Takashi Kato
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