摘要
以质量分数为 30 %的过氧化氢 (H2 O2 )为氧源 ,探讨了Na2 WO4·2H2 O催化氧化苯甲醇制苯甲酸反应中酸性添加物的影响 ,在大多数情况下 ,酸性越强 ,苯甲酸的收率越高。用NaHSO4·H2 O作酸性添加物 ,对反应条件的优化研究表明 ,氧化反应的最佳条件为n(苯甲醇 )∶n(Na2 WO4·2H2 O)∶n(NaHSO4·H2 O)∶n(H2 O2 ) =10 0∶1∶1∶30 0 ,回流 7h ,苯甲酸收率达 82 .7%。
The effects of acid additive on clean synthesis of benzoic acid via direct oxidation of benzyl alcohol with 30 % H_2O_2 catalyzed by Na_2WO_4·2H_2O were studied. In most cases, the yield of benzoic acid is high if the acidity is strong. The study on optimization of reaction condition with NaHSO_4·H_2O as acid additive indicated that the optimal conditions of oxidation reaction were that the molar ratio of n(benzyl alcohol)∶n(Na_2WO_4·2H_2O)∶n(NaHSO_4·H_2O)∶n(H_2O_2)=100∶1∶1∶300; refluxing 7 hour; and the yield of benzoic acid is 82.7%.
出处
《化工科技》
CAS
2004年第2期33-35,共3页
Science & Technology in Chemical Industry
