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The ethanethiol important organic intermediates , widely used in the synthesis of pesticides, pharmaceuticals . Catalyzed addition of ethylene and hydrogen sulfide green synthesis method of synthesis of ethyl mercaptan is a 100% atom utilization . This article using volume prepared by impregnation a series Co-Mo/γ-Al2O3 catalyst using XRD, XPS, NH3-TPD, H2-TPR and fixed bed micro- reactor experiments , to add on the preparation conditions and additives the catalyst structure , and to explore the relationship between structure and activity and selectivity of the catalyst , and discusses the impact of the main reason for catalyst Performance . To add a suitable amount of Co additives are conducive to easy to restore the surface of the species formed on the catalyst surface , and reduce the reduction temperature . When the CoO content of 10wt% , it is better able to modifying the surface of the MoS2 in the corner structure of the formation of more , thereby increasing the activity of the catalyst . The calcination temperature is not only to change the distribution and structure of the active ingredient , and also changes the acid strength of the catalyst surface . 550 ° C calcined catalyst precursor phase of the Co-Mo-S , the high activity structure \Added a small amount of K promoters help to improve the degree of dispersion of the catalyst active component and to promote the reduction of the Mo compound . When K2O content of 2 wt% , the selectivity of the ethylene conversion rate and ethanethiol , respectively, 81.7% and 61% , respectively . Vulcanizable Co-Mo/γ-Al2O3 catalyst activity in 270oC under higher ethylene pressure of 1.2MPa , H2S/C2H4 molar ratio of 3:1 mol / mol, vinyl airspeed 300h-1 , under the reaction conditions , the conversion was 82.2% , the selectivity of the ethyl mercaptan can reach 77.9% .
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