Process for producing mesocarbon microbeads of uniform particle-

Details Process for producing mesocarbon microbeads of uniform particle- Process for producing mesocarbon microbeads of uniform particle-

1981-10-30

1983-05-03

Gantz, Delbert E.

Mineral oils: processes and products

Asphalts, tars, pitches and resins; making, treating and...

208 45, 423445, 423449, C10C 308, C10C 100, C10C 300, C10B 5714

Patent

active

043819907

ABSTRACT:
Mesocarbon microbeads of narrow particle-size distribution are produced by: subjecting a heavy oil to a primary heat treatment at a temperature T.sub.1 to prepare a pitch containing mesophase microspheres; once cooling this pitch to a temperature lower than its softening point; thereafter subjecting the pitch to a secondary heat treatment at a temperature T.sub.2, which is higher than 350.degree. C. and lower than (T.sub.1 -40.degree. C.); cooling the pitch at a cool rate lower than 200.degree. C./hour; separating from the pitch mesophase microspheres which precipitated in the secondary heat-treatment step; and thereafter obtaining by solvent extraction mesophase microspheres of substantially uniform particle size formed in the residual pitch. The mesocarbon beads of narrow particle-size distribution thus obtained are particularly suitable for use as chromatograph packing material, catalyst support, and other uses.

REFERENCES:
patent: 2896261 (1959-07-01), McAfee
patent: 4080283 (1978-03-01), Noguchi et al.
patent: 4303631 (1981-12-01), Lewis et al.
Chem. Abstracts, vol. 67, 1967, 13666e, Carbon Microspheres, Charbonnages de France, Fr. 1458195 11-10-66.

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