Title:
PRODUCTION OF PITCH MATERIAL HAVING IMPROVED CHARACTERISTICSFROM FRACTION OF COAL TAR PITCH
Document Type and Number:
Japanese Patent JPS62185784
Kind Code:
A
Abstract:
A process for the production of pitch raw materials having improved properties comprising extracting coal-tar pitch free of solids with a mixture of a supercritical gas extracting agent and an entrainer at elevated temperatures and pressures, passing the extraction mixture to a plurality of separation steps where the supercritical gas and entrainer are removed by lowering the pressure and/or raising the temperature, recycling the mixture of extracting agent and entrainer to the extraction step and recovering the pitch fractions from the separation step, the said pitch fractions being useful for diverse purposes such as soot production, electrode bonding agents, etc.
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Inventors:
HERUBERUTO BENEKE
JIIKUFURIITO PEETAA
JIIKUFURIITO PEETAA
Application Number:
JP2262387A
Publication Date:
August 14, 1987
Filing Date:
February 04, 1987
Export Citation:
Assignee:
RUETGERSWERKE AG
International Classes:
B01D11/02; C10C1/18; C10C3/08; (IPC1-7): C10C1/18; C10C3/08
Attorney, Agent or Firm:
Toshio Yano