Process Optimization Of The Hydrochlorination Of Acetylene To Synthesize Chlorethylene

Right now, the vinyl chloride production technology mainly is hydrochlorination ofacetylene， but in the production， mercuric chloride,the active component in thecatalyst,exists sublimation and loss in the production, causing reducing of the catalyst lifeand environmental pollution.So we must step up to the development and promotion oflow-mercury catalyst.In this paper, we study the property of home-made low-mercury catalyst tohydrochlorination of acetylene. On the base of uniform surface adsorption model,we usethe Langmuir adsorption isotherm equation to derive the kinetics equation ofhydrochlorination of acetylene on low-mercury catalyst, and measure experimentalparameters of the kinetic equation and calculate the activation energy for the reaction, andthen make a kinetics analysis about the reaction temperature, the operating airspeed, molarratio of raw materials by the kinetics equation.Ultimately, the reaction optimization ofprocess conditions will be obtained.The main conclusions are as follows:(1) Using the Langmuir adsorption isotherm equation, in the case of one atmospheretotal pressure and the elimination of both internal and external diffusion, we derive thekinetics equation of hydrochlorination of acetylene on low-mercury catalyst.When the temperature ranges from110℃to170℃, the constants of reaction rateare: (2)Experimental results show the more appropriate process parameters：reactiontemperature is170℃, C2H2airspeed is28h-1, molar ratio of raw materials is1:1.075,acetylene conversion of98.92%was attained,which was approximately equal tothat on high-mercury catalyst’s.