反应详情

温度

350 °C

Via a powder metering device, 25 parts of 1,5-bis(ethoxycarbonylamino)naphthalene were fed at a rate of 450 liters per liter of reaction volume an hour into a tube reactor filled with zinc shavings and heated to 350° C. A pressure of 1 millibar to 3 millibars was maintained in the separating reactor. The escaping decomposition gases were fractionally condensed. In a first water-cooled vessel, 14 parts of 1,5-naphthalene diisocyanate (NDI) were obtained (80.5 theoretical percent relative to feed urethane). The melting point was 129° C. to 132° C.

1. temperatureA pressure of 1 millibar to 3 millibars was maintained in the separating reactor
2. customcondensed