PRODUCTION OF AROMATIC BISANILINES

PURPOSE:To obtain the subject compound having high purity and useful as a raw material for resins such as polyamide or polyimide, in colorless or faintly colored state, by reacting an aromatic ketone with anilines in an atmosphere essentially free from oxygen gas. CONSTITUTION:An aromatic bisaniline...

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Bibliographic Details
Main Authors TAKAYAMA TAKESHI, KOYAMA TOYOHIKO, TERAMOTO TAKEO, ONISHI KIYOTAKA, KATAHIRA SUMIO
Format Patent
LanguageEnglish
Published 20.09.1991
Subjects
ACYCLIC OR CARBOCYCLIC COMPOUNDS
CHEMISTRY
METALLURGY
ORGANIC CHEMISTRY
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Summary:PURPOSE:To obtain the subject compound having high purity and useful as a raw material for resins such as polyamide or polyimide, in colorless or faintly colored state, by reacting an aromatic ketone with anilines in an atmosphere essentially free from oxygen gas. CONSTITUTION:An aromatic bisaniline compound [e.g. 9,9-bis(4-aminophenyl) fluorene] can be produced by reacting an aromatic ketone with an aniline compound in an atmosphere essentially free from oxygen. The reaction is preferably carried out in nitrogen atmosphere, especially by passing nitrogen gas through the reactor at a rate of 0.5-10 pts.vol. of nitrogen per 1hr based on 1 pt.vol. of the reactor. It is particularly preferable to carry out the reaction by adding 2-30mol of aniline, 1-10mol of aniline hydrochloride and an azeotropic solvent for water produced by the reaction to 1mol of fluorenone and heating at 55-150 deg.C. A colorless aromatic bisaniline compound can be produced in high yield at a relatively low temperature by this process.
Bibliography:Application Number: JP19900009589