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A Green Method For Synthesizing Cyclohexanone

Posted on:2007-06-28Degree:MasterType:Thesis
Country:ChinaCandidate:Y X LiuFull Text:PDF
GTID:2121360182479234Subject:Chemical processes
Abstract/Summary:PDF Full Text Request
Potassium ferrate and hydrogen peroxide are all non-pollution green oxidant environment friendly, and have powerful oxidization and high selectivity. The reaction of oxidizing cyclohexanol to cyclohexanone by potassium ferrate and hydrogen peroxide were studied, and the effect of solvent kind, catalyst kind and amount, assistant-catalyst kind, reaction temperature, oxidant amount and reaction time were investigated in this text. The optimal reaction conditions determined by the orthogonal experiment were also involved.The results shows:(1)In the reaction of oxidizing cyclohexanol to cyclohexanone by potassium ferrate,the catalyst system of ultra-stable zeolite and HPA-1 shows good catalyst ability.With the conditions:cyclohexane of 20mL,cyclohexanol of 0.2mL, ultrastable zeolite of 0.5g,phosphoric acid of 0.15mL,potassium ferrate of 0.396g,reaction time of 12h,the yield of cyclohexanone reach 51.7%;(2)In the reaction of oxidizing cyclohexanol to cyclohexanone by hydrogen peroxide,we put forward a new method,that is taking sodium tungstate and assistant acid as catalyst system,and the catalyst ability of HPA-2 is best. With the conditions: cyclohexanol of 2mL, sodium tungstate of 1.2mmol, HPA-2of 0.12mmol, 30% hydrogen peroxide of 2.5mL,the reaction temperature of 80℃,reaction time of 6h, the yield of cyclohexanone reach 98.2%.The method used our catalyst reduced the reaction time by 6 h,reduced the reaction temperature by 5℃10℃and improved the yield of cyclohexanone of the reference[49]by 3%.(3)The effect of several self-made catalyst on the reaction were studied.Among all the self-made catalyst,the catalystic ability of PW-1 is best,which the yield of cyclohexanone could reach 76.4% in the conditionxyclohexanol of 0.2mL,hydrogen peroxide of 3mL,PW-1 of 0.02g,the reaction temperature of 80℃,reaction time of 8h.Potassium ferrate and hydrogen peroxide are all potential oxidant,how to develop suitable catalyst system is the key job.This work opened up a new way that can be followed by green synthesis of other organic compounds and has a certain reference value.
Keywords/Search Tags:cyclohexanone, potassium ferrate, hydrogen peroxide, green, oxidation
PDF Full Text Request
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