Method of preparing N-ethyl-N-cyanoethyl aniline

• Main Authors: CAI YUANLIANG, ZHANG ZHENGFU, NI HUILIN, PAN PEIHUA
• Format: Patent
• Language: Chinese; English
• Published: 14.03.2012
• Subjects: ACYCLIC OR CARBOCYCLIC COMPOUNDS; CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOIDCHEMISTRY; CHEMISTRY; METALLURGY; ORGANIC CHEMISTRY; PERFORMING OPERATIONS; PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL; THEIR RELEVANT APPARATUS; TRANSPORTING

The invention relates to a method for preparing N-ethide-N-cyanoethyl aniline, mainly comprising the following: (1) a step of condensation reaction, during which, aniline reacts with ethanol in the action of catalyst to generate N-ethyl aniline and N, N- diethylaniline which are separated through distillation to produce pure N-ethyl aniline; (2) a step of addition reaction, during which, the pureN-ethyl aniline obtained in the step (1) reacts with acrylonitrile in the action of the catalyst to produce the N-ethide-N-cyanoethyl aniline; particularly, the condensation reaction is performed in the action of a binary catalyst formed by any two of phosphorus oxychloride, phosphorus trichloride, phosphorus pentachloride, phosphorus trichloride and inorganic acid, and the content of one composition of the binary catalyst is between 5 and 95 percent. In the preparing process, on the basis of the prior process, the binary catalyst is used in the condensation reaction; and the reaction selectivity is improved and the p