Title:
ALIPHATIC DIAMINE ISOMERIZATION METHOD, DIISOCYANATE PRODUCTION METHOD, POLYURETHANE PRODUCTION METHOD, AND POLYURETHANE
Document Type and Number:
WIPO Patent Application WO/2022/009860
Kind Code:
A1
Abstract:
The present invention relates to an aliphatic diamine isomerization method involving an isomerization step in which an aliphatic diamine represented by formula (1) is isomerized in the presence of an imine compound, which is obtained by the dehydration condensation of the aliphatic diamine represented in formula (1) with an aldehyde and/or ketone, and at least one substance selected from the group consisting of alkali metals, wherein the ratio of the total amount of the alkali metal used to the total amount of the aliphatic diamine used is 0.5-6.0 mol%. (In formula (1), R represents a single bond or an aliphatic or alicyclic C1-8 unsubstituted alkylene group; n represents an integer 0 to 5.)
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Inventors:
UENO MASAYOSHI (JP)
IIDA AKIFUMI (JP)
NAGAMATSU KENTARO (JP)
IIDA AKIFUMI (JP)
NAGAMATSU KENTARO (JP)
Application Number:
PCT/JP2021/025394
Publication Date:
January 13, 2022
Filing Date:
July 06, 2021
Export Citation:
Assignee:
MITSUBISHI GAS CHEMICAL CO (JP)
International Classes:
C07C209/68; C07C211/36
Domestic Patent References:
| WO2016143537A1 | 2016-09-15 | |||
| WO2016143538A1 | 2016-09-15 | |||
| WO2016143536A1 | 2016-09-15 | |||
| WO2015041262A1 | 2015-03-26 | |||
| WO2019206694A1 | 2019-10-31 | |||
| WO2016143536A1 | 2016-09-15 | |||
| WO2016143537A1 | 2016-09-15 | |||
| WO2016143538A1 | 2016-09-15 | |||
| WO2009051114A1 | 2009-04-23 |
Foreign References:
| JP2015147940A | 2015-08-20 | |||
| JPS5699447A | 1981-08-10 | |||
| JPH07188128A | 1995-07-25 | |||
| DE4211454A1 | 1993-10-07 | |||
| CN102627569A | 2012-08-08 |
Other References:
See also references of EP 4180415A4
Attorney, Agent or Firm:
INABA, Yoshiyuki et al. (JP)
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