SELECTIVE PREPARATION OF ANISOTROPIC SPHERES FROM COMMERCIAL PITCHES BY CARBONIZATION UNDER VACUUM.

Yang Duk Park, Yozo Korai, Isao Mochida

Research output: Contribution to journalArticle

3 Citations (Scopus)

Abstract

Mesophase spheres were selectively prepared from petroleum A240, hydrotreated A240, and coal tar pitches by heat treatment at 430 degree C for 1 h under vacuum (5-10 Torr), the sphere content being as high as 55 vol% in the residual product. Mesophase spheres from A240 and coal tar pitch tended to coalesce as bulk mesophase of irregular shape when heat-treated for the longer time of 3 H. In contrast, spherical shapes of larger diameter were maintained when hydrotreated A240 was heated under the same conditions where the sphere content was 70 vol%. The spheres were separated by pyridine extraction.

Original languageEnglish
Pages (from-to)689-694
Number of pages6
JournalHigh Temperatures - High Pressures
Volume16
Issue number6
Publication statusPublished - 1984

Fingerprint

carbonization
Carbonization
Vacuum
vacuum
preparation
Coal Tar
Coal tar
tars
coal
Petroleum
crude oil
Pyridine
pyridines
heat treatment
Crude oil
Heat treatment
heat
products

All Science Journal Classification (ASJC) codes

  • Fluid Flow and Transfer Processes
  • Physical and Theoretical Chemistry
  • Computational Mechanics
  • Mechanics of Materials
  • Materials Science (miscellaneous)

Cite this

SELECTIVE PREPARATION OF ANISOTROPIC SPHERES FROM COMMERCIAL PITCHES BY CARBONIZATION UNDER VACUUM. / Park, Yang Duk; Korai, Yozo; Mochida, Isao.

In: High Temperatures - High Pressures, Vol. 16, No. 6, 1984, p. 689-694.

Research output: Contribution to journalArticle

Park, Yang Duk ; Korai, Yozo ; Mochida, Isao. / SELECTIVE PREPARATION OF ANISOTROPIC SPHERES FROM COMMERCIAL PITCHES BY CARBONIZATION UNDER VACUUM. In: High Temperatures - High Pressures. 1984 ; Vol. 16, No. 6. pp. 689-694.
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