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Study On The Catalytic Oxidation Of Cyclohexene To Cyclohexenone

Posted on:2018-05-05Degree:MasterType:Thesis
Country:ChinaCandidate:W X LiFull Text:PDF
GTID:2351330518992121Subject:Chemical engineering
Abstract/Summary:PDF Full Text Request
2-Cyclohexenone is a kind of important fine organic chemical intermediates,are widely used in spices, pharmaceutical, pesticide, surfactant, polymer materials and other fields. At present factories commonly use oxidation of cyclohexene to make 2-cyclohexenone by chromic acid, however, the cost of raw material cost is high, the reaction selectivity is low,and there is serious environmental pollution. Therefore,industrial production of 2_cyclohexenone has become a hot research topic. Traditional industrial production methods including the oxidation of cyclohexanol, hydrogenation of phenol and cyclohexene ketone bromine compound method encounter various problems, such as pollution and high cost, so the development of effective, economic and enviromental methods is imperative.According to the recent research,the cheap cyclohexene was chosen as materials to synthesis 2-cyclohexenone. This paper is expected to synthesize suitable catalyst and develop an inexpensive, environment friendly and high-quality method,meanwhile, provide a reliable basis for the industrial production.The results are summarized as following:(1) Screening of catalytic oxidation systems. Select the zirconium phosphate,cobalt tetroxide, attapulgite as supports, respectively. The catalysts were prepared by the method of chemical deposition and reflux. The catalytic oxidation system of?-ZrP,Co3O4,and Cr-PAL were investigated.(2) Synthesis of cyclohexenone. Using ?-ZrP, Co3O4, Cr-PAL as catalyst, cyclh-exene was oxidized to 2-cyclohexeneone with appropriate oxidant and solvent effect-vely, respectively. The effects of reaction temperature, reaction time, solvent type,oxidant type and reaction pressure on the oxidation reaction were investigated, and the optimum reaction parameters were obtained.(3) Characterization of the optimized catalyst. The microstructures and structures of the catalysts were investigated by y-ZrP, Co3O4 and Cr-PAL. XRD, FI-IR, SEM,TEM, XPS and BET test were used to characterize the microstructure and structure of the three catalysts.
Keywords/Search Tags:2-Cyclohexenone, Cyclohexene, Catalytic oxidation, ZrP, Co3O4, PAL
PDF Full Text Request
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