Title:
SEPARATION METHOD FOR 2-METHYL-3-BUTYNE-2-OL
Document Type and Number:
WIPO Patent Application WO/2022/016317
Kind Code:
A1
Abstract:
The present invention relates to the technical field of acetylene alcohol production, and in particular, to a separation method for 2-methyl-3-butyne-2-ol, comprising: pretreating a reaction liquid containing 2-methyl-3-butyne-2-ol to remove unreacted acetone and contained salt therein so as to obtain a 2-methyl-3-butyne-2-ol crude product; controlling the content of 2,5-dimethyl-3-hexyne-2,5-diol to be less than or equal to 0.1 wt% in the reaction liquid containing 2-methyl-3-butyne-2-ol; and separating and purifying the 2-methyl-3-butyne-2-ol crude product by means of membrane separation treatment and reduced pressure distillation treatment to obtain a 2-methyl-3-butyne-2-ol product. According to the method of the present invention, water in the product can be removed and the content of the 2,5-dimethyl-3-hexyne-2,5-diol can be decreased with reduced investment and energy consumption, thereby obtaining 2-methyl-3-butyne-2-ol having relatively high purity and conversion rate.
Inventors:
BAO YUANYE (CN)
YANG YING (CN)
LIU YINGJUN (CN)
ZHANG YONGZHEN (CN)
LI YUAN (CN)
YANG YING (CN)
LIU YINGJUN (CN)
ZHANG YONGZHEN (CN)
LI YUAN (CN)
Application Number:
PCT/CN2020/103014
Publication Date:
January 27, 2022
Filing Date:
July 20, 2020
Export Citation:
Assignee:
WANHUA CHEMICAL GROUP CO LTD (CN)
International Classes:
C07C29/76; C07C29/42; C07C29/80; C07C33/042
Foreign References:
| CN106117010A | 2016-11-16 | |||
| GB705670A | 1954-03-17 | |||
| CN207418630U | 2018-05-29 | |||
| CN104470879A | 2015-03-25 | |||
| CN104045518A | 2014-09-17 | |||
| CN102701911A | 2012-10-03 |
Attorney, Agent or Firm:
SINO-CREATIVITY INTELLECTUAL PROPERTY LAW FIRM (CN)
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