Title:
METHOD FOR PRODUCING ε-CAPROLACTAM AND METHOD FOR PRODUCING POLYAMIDE 6
Document Type and Number:
WIPO Patent Application WO/2023/074432
Kind Code:
A1
Abstract:
Provided is a green, energy-saving production method that achieves both re-utilization of a fossil resource and reduction of greenhouse gas emissions in a method for producing ε-caprolactam from a polyamide 6 resin composition. The present invention is a method for producing ε-caprolactam characterized in that a polyamide 6 oligomer aqueous solution (C) that is heated to 290-350°C inclusive is brought into contact with a resin composition (A) containing at least polyamide 6, or in that water (B) that is heated to 290-350°C inclusive is furthermore added and brought into contact with the resin composition (A) containing at least polyamide 6 in addition to the polyamide 6 oligomer aqueous solution (C) that is heated to 290-350°C inclusive.
Inventors:
YAMASHITA KOHEI (JP)
TAKAHASHI AKIHIRO (JP)
KATO MASASHI (JP)
NISHIMURA MIHOKO (JP)
KATO KOYA (JP)
TAKAHASHI AKIHIRO (JP)
KATO MASASHI (JP)
NISHIMURA MIHOKO (JP)
KATO KOYA (JP)
Application Number:
PCT/JP2022/038576
Publication Date:
May 04, 2023
Filing Date:
October 17, 2022
Export Citation:
Assignee:
TORAY INDUSTRIES (JP)
International Classes:
C07D201/12; C07D223/10; C08G69/16
Foreign References:
| JPH10287645A | 1998-10-27 | |||
| JPH1135554A | 1999-02-09 | |||
| JPH10510280A | 1998-10-06 | |||
| JP2019533041A | 2019-11-14 | |||
| JPH08217746A | 1996-08-27 | |||
| JPH10510280A | 1998-10-06 | |||
| JPH10510282A | 1998-10-06 |
Attorney, Agent or Firm:
SAKAI INTERNATIONAL PATENT OFFICE (JP)
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