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1. (WO2018084177) METHOD FOR PRODUCING N-VINYLFORMAMIDE

Pub. No.:    WO/2018/084177    International Application No.:    PCT/JP2017/039532
Publication Date: Sat May 12 01:59:59 CEST 2018 International Filing Date: Thu Nov 02 00:59:59 CET 2017
IPC: C07C 231/12
C07C 233/03
Applicants: MITSUBISHI CHEMICAL CORPORATION
三菱ケミカル株式会社
Inventors: OOISHI Noritsugu
大石 典嗣
TERAMOTO Kouji
寺本 耕志
MORI Yasuharu
森 康治
Title: METHOD FOR PRODUCING N-VINYLFORMAMIDE
Abstract:
A method for producing N-vinylformamide through a vapor-phase thermal decomposition reaction using an evaporator (10) for evaporating a raw material, a thermal decomposition reactor (20) for thermally decomposing a raw material gas generated by the evaporator (10) and a condenser (30) for condensing a thermally decomposed gas generated by the thermal decomposition reactor (20), wherein the evaporation of the raw material is started in the evaporator (10) while the temperature of a tube wall of a first connection tube (40) that connects the evaporator (10) to the thermal decomposition reactor (20) satisfies a requirement represented by formula (1): (temperature of tube wall (°C)) ≥ 0.37 × (pressure of evaporator (mmHg)) + 205.