| 摘要 |
PURPOSE:To produce an amino resin having a predetermined degree of condensation within a short time, by bringing a vapor produced in the production of an amino resin into countercurrent contact with an oil formed by condensing the vapor and subjecting the condensate to oil/water separation and recirculating this oil into the reactor. CONSTITUTION:Normal- and/or iso-butyl alcohols, formaldehyde, melamine and/or urea and/or benzoguanamine are fed to a reaction vessel 1, and the production of an amino resin is started by heating with a heating source 8. A vapor mainly consisting of said alcohol and water is fed through a gas/liquid contact apparatus 7 and a vapor pipe 2 to a condenser 3 and condensed. This condensate is led through a pipe 4 to an oil/water separator 5, where it is separated into an oil layer based on the alcohol and a water layer. This water layer is discharged out of the system through a pipe 10, and the oil layer 6 is led through a pipe 6 to the contact apparatus 7, where it is brought into gas/liquid contact with the vapor from the reaction vessel 1, and the oil is recirculated into the reactor 1.
|
