Preparation of carbon microballoons

Details Preparation of carbon microballoons Preparation of carbon microballoons

1989-02-08

1991-02-26

Theisen, Mary Lynn

Plastic and nonmetallic article shaping or treating: processes

Formation of solid particulate material directly from molten...

208 45, 264 12, 264 291, 423445, 423449, C01B 3102, B29B 910

Patent

active

049960091

ABSTRACT:
A novel process for preparing spherical carbon microballoons is disclosed. In this process, a pitch is admixed with a low-boiling organic solvent to form a pitch-solvent mixture; the pitch-solvent mixture is pulverized and flash heated at a temperature higher than the boiling point of the low-boiling organic solvent to form hollow, spherical carbon microballoons; and the carbon microballoons are rendered infusible and then sintered. The formation of hollow, spherical carbon microballoons at high yield is enabled by using a particular pitch containing 40 to 65% by weight of benzene insoluble components and up to 0.1% by weight of quinoline insoluble components, and having a softening point in the range of 60.degree. to 320.degree. C.

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