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在以改性阳离子交换树脂为催化剂、H2O2为氧化剂的催化氧化体系中,主要研究和考察了环己烯直接氧化制备1,2-环己二醇的反应,并优化得到了最佳合成工艺,在无溶剂,H2O2与环己烯的摩尔比为1.0:1.0、反应温度为70℃、反应时间为6.5h、催化剂用量为环己烯摩尔量10%的反应条件下,环己烯的转化率大于99.0%,产品1,2-环己二醇的选择性大于98.0%。阳离子交换树脂催化剂重复使用12次未见其活性和选择性明显下降。在此反应条件下,直链状的1-己烯也可高效和高选择性地转化为1,2-己二醇。
In the catalytic oxidation system using modified cation exchange resin as catalyst and H2O2 as oxidant, the reaction of cyclohexene direct oxidation to 1,2-cyclohexanediol was studied and investigated, and the optimal synthesis process was optimized. Under the reaction conditions of solvent-free, molar ratio of H2O2 to cyclohexene of 1.0: 1.0, reaction temperature of 70 ℃, reaction time of 6.5h and the amount of catalyst of cyclohexene 10%, the conversion of cyclohexene Above 99.0%, the selectivity of the product 1,2-cyclohexanediol is greater than 98.0%. Cation exchange resin catalyst reused 12 times without significant reduction of its activity and selectivity. Under this reaction condition, linear 1-hexene can also be efficiently and highly selectively converted to 1,2-hexanediol.