摘要
以分子氧为氧化剂,在气液两相条件下研究了间二甲苯氧化制备间苯二甲酸的反应,考察了各因素对反应的影响,确定了适宜的反应条件。在间二甲苯0.5 mL、乙酸钴催化剂用量0.05 g、促进剂溴化钠用量0.02 g、冰乙酸溶剂20 mL、反应温度90 C、反应时间8 h、氧气流速100 mL/min的条件下,间二甲苯转化率达到100%,间苯二甲酸收率达到98.36%。
Gas-liquid phase oxidation of m-xylene under atmospheric pressure to prepare m-toluic acid was studied using oxygen as oxidant, cobalt acetate as catalyst and acetic anhydride as solvent. The effect of reaction conditions on the conversion of m-xylene and the yield of m-toluic acid was investigated and optimum conditions were obtained. It was found that under the optimum conditions of a m-xylene amount of 0. 5 mL, a catalyst dosage of 0.05 g, a NaBr promoter dosage of 0. 02 g, a solvent amount of 20 mL, an oxygen flow rate of 100 mL/min, a reaction temperature of 90 ℃ and a reaction time of 8 h, the conversion of m-xylene and the yield of m-toluic acid reached 100% and 98.36 %, respectively.
出处
《石油炼制与化工》
CAS
CSCD
北大核心
2009年第9期17-21,共5页
Petroleum Processing and Petrochemicals
关键词
间二甲苯
间苯二甲酸
常压
氧化
m-xylene
m-toluic acid
atmospheric pressure
oxidation
