Process for preparing 1-naphthyl amine

• Main Authors: ZANDER, JURGEN, KAPPLER, ULRICH
• Format: Patent
• Language: English; French; German
• Published: 19.03.1986
• Edition: 4
• Subjects: ACYCLIC OR CARBOCYCLIC COMPOUNDS; APPARATUS THEREFOR; CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOIDCHEMISTRY; CHEMISTRY; GENERAL METHODS OF ORGANIC CHEMISTRY; METALLURGY; ORGANIC CHEMISTRY; PERFORMING OPERATIONS; PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL; THEIR RELEVANT APPARATUS; TRANSPORTING

1-Naphthylamin wird hergestellt durch Hydrierung von 1-Nitronaphthalin, das praktisch frei von Schwefelverbindungen und von isomeren Nitronaphthalinen ist, bei erhohter Temperatur und bei erhohtem Druck in Gegenwart von inerten, mit Wasser mischbaren organischen Lösungsmitteln und in Gegenwart eines Platin Aktivkohle-Katalysators, wobei die mittlere Verweilzeit des Reaktionsgemisches im Reaktor 3 bis 30 Minuten betragt. 1. Process for the preparation of 1-naphthylamine by the catalytic hydrogenation of 1-nitronaphthalene at elevated temperature and elevated pressure, in the presence of inert organic solvents miscible with water, characterized in that purified 1-nitronaphthalene, which is virtually free of sulphur compounds and isomeric 2-nitronaphthalene is hydrogenated at temperatures of 150 to 250 degrees C and pressures of 50 to 300 bar, in the presence of platinum/activated charcoal, the average residence time of the reaction mixture in the reactor being 3 to 30 minutes.