Title:
低品位炭の改質方法
Document Type and Number:
Japanese Patent JP4122695
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To directly more inexpensively obtain oxygen-containing compounds of high added value including dihydric phenols in high yield from coal through no coal tar route, and to convert the coal to high-BTU modified coal or coal- water-oil slurry. SOLUTION: This method for modifying low-grade coal comprises the following processes: in a reaction step 26, low-grade coal 20 is thermally hydrolyzed in subcritical or supercritical water at 10-40 MPa and 200-550 deg.C to obtain a decomposition product; in a separation step 36, water-soluble substances, residues 28 and water-insoluble oils 29 are then separated from the above decomposition product; in a water-soluble substances recovery step 37, oxygen-containing compounds 27 based on dihydric phenols comprising catechol, resorcinol, hydroquinone or a mixture thereof are subsequently recovered from the above water- soluble substances; and the above residues and water-insoluble oils are converted to modified coal 32 or coal-water-oil slurry 34.
Inventors:
Den order
Tate Hatakeyama
Yosuke Miyashita
Akira Tanaka
Shinichi Hasegawa
Murayama Satoshi
Kenji Nishimura
Tate Hatakeyama
Yosuke Miyashita
Akira Tanaka
Shinichi Hasegawa
Murayama Satoshi
Kenji Nishimura
Application Number:
JP2000256112A
Publication Date:
July 23, 2008
Filing Date:
August 25, 2000
Export Citation:
Assignee:
Mitsubishi Materials Corporation
International Classes:
C07B61/00; C10L9/00; C07C37/50; C07C39/08; C10B57/08; C10L5/00
Domestic Patent References:
| JP2000229900A | ||||
| JP11166183A | ||||
| JP5978294A | ||||
| JP175591A | ||||
| JP63258983A |
Other References:
泉谷文穂 他4名,超臨界水による石炭分解処理,石炭利用技術会議講演集,日本,1999年 9月,Vol.9th,p.175-183
Attorney, Agent or Firm:
Masayoshi Suda