文献类型：期刊文献

中文题名：对伞花烃及其裂解产物甲苯的间接电解氧化反应研究

英文题名：STUDIES ON INDIRECT ELECTROLYTIC OXIDATIONS OF p-CYMENE AND ITS CRACKING PRODUCT——TOLUENE

作者：毕良武[1] 刘先章[1] 赵振东[1] 许鹏翔[2] 储富祥[1]

第一作者：毕良武

机构：[1]中国林业科学研究院林产化学工业研究所;[2]厦门大学化学系

年份：2005

卷号：25

期号：1

起止页码：5-9

中文期刊名：林产化学与工业

外文期刊名：Chemistry & Industry of Forest Products

收录：CSTPCD;;EI(收录号：2005199092991);Scopus(收录号：2-s2.0-17944371731);CSCD:【CSCD_E2011_2012】；

语种：中文

中文关键词：对伞花烃;甲苯;间接电解氧化

外文关键词：p-cymene; toluene; indirect electrolytic oxidation

分类号：TQ351.472

摘要：在无隔膜电解槽中,Pb-Sb合金为阳阴电极,Mn2+电解氧化成Mn3+的理想条件为:极板面积比(A+ /A- )为 5∶1,硫酸浓度为 5mol/L,阳极电流密度为 80mA/cm2,Mn2+浓度为1mol/L左右,温度在 25~35℃,电量比值为 1. 20。此时电解电流效率在 60%左右,Mn3+得率超过 70%。Mn3+氧化对伞花烃得到的主要产物为对甲基苯乙酮和枯茗醛,Mn3+与对伞花烃摩尔比为 4∶1时,氧化产物中枯茗醛的选择性相对较高,对甲基苯乙酮和枯茗醛的得率分别为 55. 19%和 31. 64%。Mn3+氧化甲苯得到的主要产物为苯甲醛,合适的氧化条件是Mn3+与甲苯摩尔比为 1∶6,苯甲醛的得率为 73. 67%。电解液经正己烷萃取和活性炭吸附可再生循环使用 8次以上。
Reasonable condition for electrolytic oxidation of Mn^(2+) to Mn^(3+) in a diaphragmless electrolytic cell using anodic and cathodic electrodes of Pb-Sb alloy are:5∶1 area ratio of anode to cathode,5 mol/L of sulfuric acid,80 (mA/cm^2) of anodic current density,1 mol/L of Mn^(2+),25-35 ℃ of temperature,1.20 of Coulomb ratio.Current (efficiency) is about 60%,and electrolytic yield is over 70% under the above condition.When the ratio of Mn^(3+) to (p-cymene) is about 4∶1(molar ratio),selectivity of cuminaldehyde in the oxidized products is relatively high.Yields of main oxidized products,namely p-methyl acetophenone and cuminaldehyde are 55.19% and 31.64%,respectively.Suitable condition for oxidation of toluene by Mn^(3+) is that the ratio of Mn^(3+) to toluene is about 1∶6(molar ratio).Yield of benzaldehyde is 73.67%.The electrolytic liquor can be repeatedly used over 8 times by regeneration after (extraction) by n-hexane and adsorption by activated carbon.