公开(公告)号：US06297393B1

公开(公告)日：2001-10-02

申请号：US09652378

申请日：2000-08-31

Applicant: Ananda Kumar Bandyopadhyay ,  Khathija Aziz ,  Pravin Raybaji Likhar ,  Boyapati Manoranjan Choudary

Inventor： Ananda Kumar Bandyopadhyay ,  Khathija Aziz ,  Pravin Raybaji Likhar ,  Boyapati Manoranjan Choudary

IPC: C07C25300

CPC classification number: C07C253/20 ,  C07C255/04

Abstract: The invention describes an improved process for the preparation of malononitrile by using a porous particulate solid substance as efficient absorbent. Cyanoacetamide is reacted with POCl3 as a dehydrating agent in a suitable solvent in the presence of an organic N-donor base as catalyst and a porous particulate solid substance as efficient absorbent. The product is then distilled under vacuum from the crude in the presence of a stabilizer into a receiver containing the same stabilizer, to obtain malononitrile of high purity and shelf-life.

Abstract translation: 本发明描述了通过使用多孔颗粒固体物质作为有效吸收剂来制备丙二腈的改进方法。 在有机N-供体碱作为催化剂和作为有效吸收剂的多孔颗粒固体物质的存在下，将氰基乙酰胺与POCl 3作为脱水剂在合适的溶剂中反应。 然后将产物在稳定剂存在下从真空中真空蒸馏到含有相同稳定剂的接收器中，得到高纯度和保质期的丙二腈。