Document Type and Number:
Japanese Patent JPH0575795
Kind Code:
B2
Abstract:
There is described an improved liquefaction process by which coal is converted to a low ash and low sulfur carbonaceous material that can be used as a fuel in an environmentally acceptable manner without costly gas scrubbing equipment. In the process, coal is slurried with a solvent, passed through a preheater and at least two dissolvers in series in the presence of hydrogen-rich gases at elevated temperatures and pressures. Solids, including mineral ash and unconverted coal macerals are separated from the condensed dissolver effluent. In accordance with the improved process, fresh hydrogen is fed to each dissolver and the entrained gas from each dissolver is separated from the slurry phase and removed from the reactor system before the condensed phase is passed to the next dissolver in the series. In accordance with another process, the feeds to the dissolvers are such that the top of each downstream dissolver is used as a gas-liquid separator.
Inventors:
EDOIN ENU GIBUNSU
DEBITSUDO EICHI ESU INGU
DEBITSUDO EICHI ESU INGU
Application Number:
JP9686882A
Publication Date:
October 21, 1993
Filing Date:
June 04, 1982
Export Citation:
Assignee:
INT KOORU RIFUAININGU CO
International Classes:
C10L9/04; C10G1/00; C10G1/06; (IPC1-7): C10G1/06
Next Patent: 電子鍵盤楽器のスピーカ装置