Kabushiki Kaisha Kobe Seiko Sho

Idemitsu Kosan Company, Limited

Mitsubishi Kasei Corporation

Cosmo Oil Co., Ltd.

Mitsubishi Kasei Kogyo Kabushiki Kaisha

Nippon Brown Coal Liquefaction Co., Ltd.

Idemitsu, Kosan Kabushiki-kaisha

Aziasekiyu Kabushiki Kaisha

Hiroshi Yoshimura

Tetsuo Matsumura

Yasuo Sugino

Osamu Okuma

Toshio Ohzawa

Kaizaburo Saito

Kazuhiro Mae

Osamu Ohkuma

Shun-ichi Yanai

Saburo Sawada

Shun'ichi Yanai

Tatsuo Hirano

Akihiro Kawashima

Koji Murakoshi

A method for hydro-liquefying coal, the method comprising preheating a slurried mixture of a pulverized coal and a solvent, the preheated mixture being supplied to a plurality of reactors; separating a gaseous content from the products resulting from the reaction; dehydrating the gaseous content and removing a light oil content therefrom, thereby obtaining hydrogen-content gases; and recycling the hydrogen-content gases at least to the first reactor and supplying it to the bottom thereof so that the light oil content in the solvent is stripped.

Method of coil liquefaction by hydrogenation

A starting slurry composed of raw brown coal and a solvent is heated and pressurized, subjected to gas-liquid separation and dehydration and then to hydrogenation/liquefaction. The CO.sub.2 -containing gas produced in the preheating/dehydration step and/or a CO.sub.2 -containing gas supplied from outside the system is blown into the slurry in the above-mentioned preheating/dehydration step, whereby carbonate-forming metal components in the brown coal are converted to the carbonates thereof in advance. In this manner, the hydrogenation/liquefaction efficiency is improved, and stabilized long-term continuous operation is attained.

Method of treating brown coal for liquefaction

Growing community of inventors

Kobe, Japan

Hiroshi Yoshimura