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Title:
METHOD FOR EXTRACTING PHENOLIC SUBSTANCE FROM COAL TAR OR DIRECT COAL LIQUEFACTION OIL
Document Type and Number:
WIPO Patent Application WO/2018/188400
Kind Code:
A1
Abstract:
A method for extracting a phenolic substance from coal tar or direct coal liquefaction oil, comprising the following steps: (1) extracting the phenolic substance from coal tar or direct coal liquefaction oil, the raffinate phase being dephenolized oil, and the extracting phase being an extracting agent enriched in the phenolic substance; (2) applying an acidifying agent to acidify the extracting phase to obtain crude phenol oil and the extracting agent enriched in the acidifying agent; (3) performing the acidifying agent removal and extracting agent regeneration; and (4) recycling a few amount of extracting agent in the dephenolized oil and crude phenol oil.

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Inventors:
LUO HEAN (CN)
LI YONGLIN (CN)
AI QIUHONG (CN)
YOU KUIYI (CN)
YAN SHI (CN)
JIANG GUOZHANG (CN)
ZHANG XIN (CN)
Application Number:
PCT/CN2018/073313
Publication Date:
October 18, 2018
Filing Date:
January 19, 2018
Export Citation:
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Assignee:
YULIN HENGYI SALT IND CO LTD (CN)
International Classes:
C07C37/72; C07C39/04; C07C39/06; C07C39/14; C10C1/18
Foreign References:
CN106986750A2017-07-28
CN101143805A2008-03-19
CN1094025A1994-10-26
CN102219649A2011-10-19
DE3302812A11984-08-02
Attorney, Agent or Firm:
BEIJING TROHENG INTELLECTUAL PROPERTY LAW FIRM (CN)
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