| 二步法催化氧化苯甲醛合成苯甲酸工艺研究 |
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| 引用本文： | 关昶,刘亚歌,丁斌,郝凤岭,李祥. 二步法催化氧化苯甲醛合成苯甲酸工艺研究[J]. 吉林化工学院学报, 2012, 29(1): 19-21 |
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| 作者姓名： | 关昶 刘亚歌 丁斌 郝凤岭 李祥 |
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| 作者单位： | 1. 吉林化工学院,化工与材料工程学院,吉林吉林132022
2. 中国石油东北炼化工程有限公司,吉林设计院,吉林吉林132012 |
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| 摘 要： | 采用2步法催化氧化苯甲醛合成苯甲酸,氧化剂为过氧化氢,催化剂为钨酸钠.其中过氧化氢分两次加入,第1次加入总量40%的过氧化氢,第2次加入剩余的过氧化氢.实验结果表明,2步法加入过氧化氢得到的苯甲酸收率为56.22%,明显高于1步法的苯甲酸的收率.对首次加入过氧化氢时的物料比进行了正交试验,最佳合成条件为n(H2O2)/n(Na2WO4.2H2O)n(NaHSO4)n(C6H5CHO)=100 1.2 1 250.同时考察了2步法反应的回流时间对收率的影响,结果表明第1步的反应时间3 h,第2步反应的时间5 h的反应条件最优.
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| 关 键 词： | 催化氧化 苯甲酸 过氧化氢 正交试验 加料方式 |
Study on preparation technology of benzoic acid by catalytic oxidation of beznaldehyde with two-step method |
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| GUAN Chang,LIU Ya-ge,DING Bin,HAO Feng-ling,LI Xiang. Study on preparation technology of benzoic acid by catalytic oxidation of beznaldehyde with two-step method[J]. Journal of Jilin Institute of Chemical Technology, 2012, 29(1): 19-21 |
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| Authors: | GUAN Chang LIU Ya-ge DING Bin HAO Feng-ling LI Xiang |
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| Affiliation: | 1 ( 1. College of Chemical ＆ Materials Engineering, Jilin Institute of Chemical Technology, Jilin City 132022, China;2. Jilin Design Institute, China Petroleum Northeast Oil Refining Engineering Co. Ltd. , Jilin City 132021, China) |
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| Abstract: | Benzoic acid was prepared by catalytic oxidation of benzladyde with two-step method, the H2O2 was used as oxidant and the Na2WO4.2H2O was used as catalyst. The H2O2 was added twice in this method,and in the first step there was 40% of H2O2. The results show that the two-step feed way can observably improve the yield of benzoic acid,which can reach 56.22%. The effect of the first-step feed way on the oxidation reaction was discussed. The yield can reach 67.79% at the condition of molar ration of n （ H2O2 ）/n （ Na2WO4.2 H2 O） / n（ NaHSO4 ）/n（ C6H5CHO） = 100 ： 1.2 ： 1 ： 250. The effect of the return time on the yield coefficient was also discussed. The results show that the preferable retune time was 3 h in the first step and 5 h in the second step. |
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| Keywords: | catalytic oxidation benzoic acid hydrogen peroxide orthogonal test adding method |
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