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将5A分子筛与CoCl_2溶液混合蒸发至干,150℃干燥(8～12)h,水洗,干燥。洗脱液光度分析表明,载体对CoCl_2存在饱和量,且随干燥温度的变化而改变。XRD、IR及激光拉曼分析显示,催化剂与载体存在强相互作用。干燥温度过低,造成催化活性组分在反应过程中的脱落;干燥温度过高,导致载体本身结构的改变而降低稳定性。将15.0 mmol对二甲苯、0.50 mmol对甲基苯甲酸和80 mg催化剂混合,常压、95℃反应10 h,对二甲苯转化率为56.44%,对甲基苯甲酸、对甲基苯甲醛和对甲基苯甲醇的收率分别为44.82%、5.80%和2.75%,考察了催化剂的使用寿命,并对结构进行了表征。
The 5A molecular sieve mixed with CoCl 2 solution was evaporated to dryness, dried at 150 ℃ (8 ~ 12) h, washed with water and dried. The photometric analysis of the eluate showed that the carrier had a saturated amount of CoCl 2 and changed with the drying temperature. XRD, IR and laser Raman analysis showed that there was a strong interaction between the catalyst and the support. Drying temperature is too low, resulting in the catalytic activity of the components off during the reaction; the drying temperature is too high, resulting in changes in the structure of the carrier itself to reduce the stability. 15.0 mmol of p-xylene, 0.50 mmol of p-toluic acid and 80 mg of catalyst were mixed under atmospheric pressure and reacted at 95 ° C for 10 h with a conversion of p-xylene of 56.44%, p-toluic acid and p- The yield of p-methylbenzyl alcohol was 44.82%, 5.80% and 2.75%, respectively. The service life of the catalyst was investigated and the structure was characterized.