Invention Grant
- Patent Title: Method for preparing dicyanoalkane and bis(aminomethyl) alkane
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Application No.: US17045897Application Date: 2019-04-11
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Publication No.: US11542222B2Publication Date: 2023-01-03
- Inventor: Noriyuki Shiomi , Emi Nakano , Akifumi Iida
- Applicant: MITSUBISHI GAS CHEMICAL COMPANY, INC.
- Applicant Address: JP Chiyoda-ku
- Assignee: MITSUBISHI GAS CHEMICAL COMPANY, INC.
- Current Assignee: MITSUBISHI GAS CHEMICAL COMPANY, INC.
- Current Assignee Address: JP Chiyoda-ku
- Agency: Oblon, McClelland, Maier & Neustadt, L.L.P.
- Priority: JPJP2018-076239 20180411
- International Application: PCT/JP2019/015738 WO 20190411
- International Announcement: WO2019/198782 WO 20191017
- Main IPC: C07C209/48
- IPC: C07C209/48 ; B01J23/06 ; B01J23/745 ; B01J25/00 ; C07C253/22
Abstract:
A method for preparing a dicyanoalkane may omit a filtration for a catalyst after a cyanation reaction can by carrying out the cyanation reaction in a state in which precipitation of a metal catalyst is suppressed. A method for preparing a dicyanoalkane may involve cyanating one or more aliphatic dicarboxylic acids and/or salt(s) thereof with an ammonia source in the presence of a predetermined compound and a catalyst, wherein, in the cyanation, the amount of the predetermined compound is maintained at a predetermined amount or more with respect to the catalyst.
Public/Granted literature
- US20210139408A1 METHOD FOR PREPARING DICYANOALKANE AND BIS(AMINOMETHYL)ALKANE Public/Granted day:2021-05-13
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