Synthesis Of Ethyl Mercaptan By Catalytic Addition Of Hydrogen Sulfide To Ethylene

Usingγ-alumina as support, ammonium molybdate and cobalt nitrate as impregnated precursor components, a series of Co-Mo/γ-Al2O3 samples were prepared by incipient-wetness impregnation method, and their physico-chemical performances were characterized by XRD, XPS and NH3-TPD techniques.The fixed bed reactor was used to test the effect of reaction temperature, reaction pressure, gas hourly space velocity of ethylene and molar ratio of reactants on the catalytic activity for the addition of hydrogen sulfide to ethylene. The reaction condition of temperature of 240°C, pressure of 1.4MPa, GHSV of ethylene of 300h-1 and molar ratio of hydrogen sulfide to ethylene of 3:1 was estimated as the proper evaluation condition.The activity of Co-Mo/γ-Al2O3 catalyst for ethyl mercaptan synthesis from hydrogen sulfide and ethylene was evaluated, and the influence of the composition and the preparation condition of the catalysts on the catalyst performences were investigated under above evaluation conditions. The result showed that the catalyst calcined at 500°C was better, the optimal content of MoO3 and CoO loading on the catalyst were both 10wt%.Orthogonal experiment was designed to optimize the reaction condition and the result showed that the optimal reaction conditions were temperature of 265°C, pressure of 1.6MPa, GHSV of ethylene of 240h-1 and molar ratio of hydrogen sulfide to ethylene of 2:1.