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Title:
HIGH TEMPERATURE SOLVENT PRETREATMENT METHOD FOR IMPROVING YIELD OF DIRECT SODIUM-RICH COAL LIQUEFACTION OIL
Document Type and Number:
WIPO Patent Application WO/2018/095234
Kind Code:
A1
Abstract:
Disclosed is a high temperature solvent pretreatment method for improving the yield of a direct sodium-rich coal liquefaction oil. In the treatment method, firstly raw coal is subjected to a crushing treatment, the crushed coal is blended with a compound solvent in a reactor and is then treated by ultrasonic oscillation, the mass feed ratio of the crushed coal to the compound solvent is 2 : 1 to 1 : 1. The resulting mixed slurry after ultrasonic treatment is then subjected to a heat treatment under conditions of 200ºC-250ºC, the reactor is quickly heated by a flow sand bath, the heat treatment time is 20-40 min, the heat treated mixed slurry is separated by way of centrifugal precipitation, and the solvent can be recovered and used for a subsequent liquefaction experiment. The pretreatment method of the present application is easy to operate, has a recyclable solvent, and has an obvious promotion effect on the direct liquefaction oil yield. After the high temperature solvent pretreatment of the present application, the oil yield of direct high-sodium coal liquefaction can be increased by 10% -13% (dry ash-free basis), the overall conversion rate can be increased by 15% -18% (dry ash-free basis), and the method has good industrial value and application potential.

Inventors:
LI, Xiao (No. 1, Daxue Road Tongsha, Xuzhou Jiangsu 0, 220000, CN)
MENG, Xianliang (No. 1, Daxue Road Tongsha, Xuzhou Jiangsu 0, 220000, CN)
CHU, Ruizhi (No. 1, Daxue Road Tongsha, Xuzhou Jiangsu 0, 220000, CN)
WU, Guoguang (No. 1, Daxue Road Tongsha, Xuzhou Jiangsu 0, 220000, CN)
Application Number:
CN2017/110665
Publication Date:
May 31, 2018
Filing Date:
November 13, 2017
Export Citation:
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Assignee:
CHINA UNIVERSITY OF MINING AND TECHNOLOGY (No. 1, Daxue Road Tongsha, Xuzhou Jiangsu 0, 220000, CN)
International Classes:
C10G1/00; C10G1/06
Foreign References:
CN106701137A2017-05-24
CN103589444A2014-02-19
CN102124081A2011-07-13
JPH09286987A1997-11-04
US4252633A1981-02-24
Attorney, Agent or Firm:
NANJING JINGWEI PATENT & TRADEMARK AGENCY CO., LTD (12th FL.-B, No. 179 Zhongshan Road Gulo, Nanjing Jiangsu 5, 210005, CN)
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