PURPOSE: To remove reaction heat by latent heat in evaporation by separately and continuously feeding two or more kinds of raw materials to main part of reaction in the presence of a solvent, bringing these raw materials into contact with each other for a short time to react these raw materials and introducing the reaction mixture into a subsidiary reaction part having a larger volume and a lower pressure than main part of reaction.
CONSTITUTION: The inside of a reaction device 4 is kept at 40mmHg pressure and a cyclohexane solution of PCl3 and n-propyl alcohol are cooled to -5 to -4°C, each fed from lines 1 and 2 to a static mixer 3 with 6 stages, and the cyclohexane solution is brought into contact with n-propyl alcohol for 0.4sec. The reaction mixture is scattered in atomized state because of a reduced pressure of the reaction device and dropped along a device wall by a direct drop- preventing umbrella (temperature sensor 16 is -2°C). The evaporated solution is passed through a line 11 and entered a receiver 15 and product is entered a receiver 10. The reaction mixture may be dropped inside a spiral pipe. Thereby reaction heat is quickly removed and subsidiary reaction is suppressed, and the objective product can be inexpensively obtained in good yield.
ARAI YOSHIAKI
SHIMADA KENJI
KAWADA SHUJI
