Organic compounds -- part of the class 532-570 series – Organic compounds – Amino nitrogen containing
Patent
1997-03-31
1999-09-28
Kumar, Shailendra
Organic compounds -- part of the class 532-570 series
Organic compounds
Amino nitrogen containing
564204, C07C23124, C07C23303
Patent
active
059591480
ABSTRACT:
A purification process of N-vinylformamide, which comprises: providing a crude N-vinylformamide having an acetone-insoluble component content of not more than 400 ppm; and continuously feeding the crude N-vinylformamide into a fractionating tower, to obtain an N-vinylformamide having high purity. Also disclose is a continuous purification process of N-vinylformamide, which comprises the steps of: providing a crude N-vinylformamide; feeding the crude N-vinylformamide into a thin film evaporator to remove un-evaporated fraction from the system, and feeding the evaporated fraction containing N-vinylformamide into a fractionating tower, distilling the purified N-vinylformamide from the tower head, and discharging a bottom liquid containing N-vinylformamide from the tower bottom, and recycling the bottom liquid into the thin film evaporator to remove un-evaporated fraction from the system, and feeding the evaporated fraction into the fractionating tower.
REFERENCES:
patent: 4578515 (1986-03-01), Dawson et al.
patent: 4814505 (1989-03-01), Kroener et al.
patent: 5554792 (1996-09-01), Sawayama et al.
Izumikawa Hiroshi
Koresawa Eiichiro
Oshida Takahiro
Sato Shin'ichi
Tanaka Akihiko
Conlin David G.
Kumar Shailendra
Mitsubishi Chemical Corporation
Neuner George W.
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