Process for producing pitch used as starting material for the making of carbon materials
AssigneeMitsubishi Gas Chemical Company, Inc.
InventorsIsao Mochida, Susumu Fujiyama, Yukio Sakai, Hiroyuki Otsuka
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Abstract
A process for producing pitch useful as a starting material for the manufacture of a carbon material is provided. The pitch is produced by polymerizing a condensed nuclear aromatic compound or a material containing the same. The polymerization is carried out in the presence of a hydrogen fluoride/boron trifluoride catalyst system. The condensed nuclear aromatic compounds which may be used in this process are naphthalene, anthracene, phenanthrene, acenaphthene, acenaphthylene, pyrene and mixtures thereof.
Claims17
A process for producing pitch capable of being converted to a mesophase by heat treatment, both the pitch and mesophase being useful as a starting material for the manufacture of carbon material, said process comprising
- polymerizing a condensed nuclear aromatic compound or a material containing a condensed nuclear aromatic compound in the presence of a hydrogen fluoride/boron trifluoride catalyst system,
- wherein said condensed nuclear aromatic compound is selected from the group consisting of naphthalene, anthracene, phenanthrene, acenaphthene, acenaphthylene, pyrene and mixtures thereof,
- wherein said material containing a condensed nuclear aromatic compound is selected from the group consisting of a petroleum fraction, a residual oil originating from petroleum processing steps, and a coal tar fraction,
- wherein said hydrogen fluoride is used in an amount of from about 3 to about 20 moles and said boron trifluoride in an amount of from about 0.1 to about 1.0 mole per mole of the condensed nuclear aromatic compound.
Dependencies are inferred from the claim text.