Title:
METHOD FOR CONTINUOUSLY SYNTHESIZING PSEUDOIONONE
Document Type and Number:
WIPO Patent Application WO/2022/104581
Kind Code:
A1
Abstract:
The present invention belongs to the field of the preparation of pseudoionone, and relates to a method for continuously synthesizing pseudoionone. The method comprises continuously introducing citral, acetone, and an alkaline catalyst containing an inorganic alkali and an acetate into a tubular reactor for an aldol condensation reaction, wherein the reaction temperature in the tubular reactor gradually increases; continuously introducing the condensation reaction product into an acetone recovery device with multiple kettles in series to recover acetone; subjecting the acetone-removed product to extraction and layering; and neutralizing an obtained oil layer with a dilute acid to obtain the pseudoionone. In the present invention, on the premise of the relatively high economy and environmental protection, a high yield and high purity of pseudoionone and a high conversion rate of the raw material citral are achieved, and the recycling and reuse of acetone and an alkaline aqueous layer are achieved, thereby reducing production costs.
Inventors:
WEI GAONING (CN)
DAI JIANKUN (CN)
LIU XIN (CN)
TANG ZHENWEI (CN)
CHEN LINFENG (CN)
DAI JIANKUN (CN)
LIU XIN (CN)
TANG ZHENWEI (CN)
CHEN LINFENG (CN)
Application Number:
PCT/CN2020/129698
Publication Date:
May 27, 2022
Filing Date:
November 18, 2020
Export Citation:
Assignee:
XIAMEN KINGDOWAY VITAMIN INC (CN)
XIAMEN KINGDOWAY GROUP COMPANY (CN)
XIAMEN KINGDOWAY GROUP COMPANY (CN)
International Classes:
C07C49/203; C07C45/74
Domestic Patent References:
| WO2004041764A1 | 2004-05-21 |
Foreign References:
| CN103044223A | 2013-04-17 | |||
| CN109180452A | 2019-01-11 | |||
| CN111187152A | 2020-05-22 | |||
| CN109096073A | 2018-12-28 | |||
| CN110002981A | 2019-07-12 | |||
| CN108976108A | 2018-12-11 | |||
| CN111825538A | 2020-10-27 |
Other References:
CHENG JIUDAN, TANG XIN-YANG: "Study on LiOH·H2O Catalytic Synthesis of Pseudoionone", GUANGZHOU CHEMISTRY, vol. 41, no. 4, 31 August 2016 (2016-08-31), pages 51 - 55, XP055932295, ISSN: 1009-220X, DOI: 10.16560/j.cnki.gzhx.20160417
Attorney, Agent or Firm:
XIAMEN JINGCHENGXINCHUANG INTELLECTUAL PROPERTY AGENCY CO. LTD. (CN)
Download PDF: