作　　者： ; ; ;

机构地区： 华南理工大学化学与化工学院传热强化与过程节能教育部重点实验室

出　　处： 《环境科学学报》 2009年第10期2148-2151,共4页

摘　　要： 电视机外壳热解油中含有的2,4,6-三溴苯酚、1,2,4,5-四溴苯、五溴二苯醚(P5BDE)等会严重影响其质量,为了净化电视机外壳热解油,试验用纯的1,2,4,5-四溴苯作原料,在单金属Pd/C作催化剂,异丙醇作氢源条件下进行催化脱溴研究.同时,研究了反应体系pH值(NaOH加入量)对1,2,4,5-四溴苯脱溴效率的影响,最后探讨了1,2,4,5-四溴苯催化脱溴的反应机理.结果表明,当温度设定为50℃,搅拌速度设定为900r.min-1,反应4h,脱溴效率可达100%;pH值在0～9之间时,pH越大,1,2,4,5-四溴苯脱溴效率越高;pH值≥9时,pH值增大,脱溴效率保持不变.实验用Pd/C作催化剂,经处理后可重复使用,并且产物为苯,在工业上的应用非常广泛,该实验具有很高的实用性. The pyrolysis oil of TV shells contains 2,4,6-tribromophenol,1,2,4,5-tetrabromobenzene,pentabromodiphenyl ether （P5BDE） and other similar compounds. The bromine in the pyrolysis oil affects its remediation. We tested debromination methods for TV shell pyrolysis oil using pure 1,2,4,5-tetrabromobenzene as raw material. The catalyst was Pd/C and the hydrogen source was isopropyl alcohol. The results show that when the temperature is seted to 50 ℃,and when stirring speed is seted to 900r·min^-1,the debromination efficiency can reach 100%. The pH （the amount of NaOH） in the system affected the 1,2,4,5-tetrabromobenzene debromination efficiency. In the pH range 09,the rate of debromination of 1,2,4,5-tetrabromobenzene increases as pH rises. When pH≥9,the rate of debromination of 1,2,4,5-tetrabromobenzene does not change as the pH increases. We also describe the reaction mechanisms of 1,2,4,5-tetrabromobenzene debromination. This experiment used Pd/C as catalyst. After treated,it can be reused. And Product was benzene. Application in industry is very broad. The experiment has a higher degree of practicality.

关 键 词： 电视机外壳 热解油 四溴苯 异丙醇

领　　域： [环境科学与工程]