关键词: 反应器, 二甘醇乙烯基醚, 乙炔, 反应动力学, 制备

Abstract: Using potassium diethylene glycolate as catalyst, diethylene glycol vinyl ether was synthesized from acetylene and diethylene glycol by liquid phase cyclic reaction in a tubular reactor. The effects of catalyst dosage, reaction temperature, reaction pressure and residence time on acetylene conversion were studied. The appropriate reaction conditions are as following:the dosage of potassium diethylene glycolate is 4% based on diethylene glycol mass, the reaction temperature is 175℃, the reaction pressure is 6MPa and the residence time is 175s. Under these conditions, continuous production of diethylene glycol were conducted. At steady state, the conversion of diethylene glycol reached 76.03%, the yield of diethylene glycol monovinyl ether was 59.03%, the yield of diethylene glycol divinyl ether was 15.10% and the total yield of diethylene glycol vinyl ether was up to 74.13%. The reaction of diethylene glycol and acetylene was in good agreement with the first order reaction kinetics. The pre-exponential factor k₀ is 1.20×10⁸s^-1, and the reaction activation energy E is 86.86kJ/mol. Because of no existence of gas-phase acetylene in the tubular reactor, the danger of flammable and explosive acetylene in the gas phase under high temperature and high pressure has been overcome.

Key words: reactors, diethylene glycol vinyl ether, acetylene, reaction kinetics, preparation