Title:
METHOD FOR PRODUCING HIGH-PURITY 1,3-BUTYLENE GLYCOL
Document Type and Number:
WIPO Patent Application WO/2023/058687
Kind Code:
A1
Abstract:
This method for producing a high-purity 1,3-butylene glycol includes: a step for heat-treating a preparation fluid containing 1,3-butylene glycol; a step for removing, by distillation, a low-boiling-point substance included in at least the treated fluid or the treated vapor which has been subjected to the heat-treatment. The content of the base in the preparation fluid in the heat treatment step is less than 0.2 mass%.
Inventors:
KAMIHIGASHI SHUN (JP)
KUBOKI MASAHARU (JP)
KANADA JUN (JP)
KUBOKI MASAHARU (JP)
KANADA JUN (JP)
Application Number:
PCT/JP2022/037298
Publication Date:
April 13, 2023
Filing Date:
October 05, 2022
Export Citation:
Assignee:
KH NEOCHEM CO LTD (JP)
International Classes:
C07C29/88; C07C29/80; C07C31/20
Domestic Patent References:
| WO2021131751A1 | 2021-07-01 | |||
| WO2019240009A1 | 2019-12-19 | |||
| WO2000007969A1 | 2000-02-17 |
Foreign References:
| JP2001213823A | 2001-08-07 |
Attorney, Agent or Firm:
INABA, Yoshiyuki et al. (JP)
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