| 负载型磷钨酸催化合成2-氯吡啶-N-氧化物 |
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| 引用本文： | 邱滔,赵红旭,吕新宇.负载型磷钨酸催化合成2-氯吡啶-N-氧化物[J].精细石油化工,2010,27(1). |
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| 作者姓名： | 邱滔 赵红旭 吕新宇 |
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| 作者单位： | 江苏工业学院精细化工研究所,江苏,常州,213164 |
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| 摘 要： | 实验采用浸渍法制备SiO_2负载磷钨酸催化剂;以2-氯吡啶为原料、H_2O_2为氧化剂合成了2-氯吡啶-N-氧化物。讨论了磷钨酸负载量、催化剂用量、反应物配比、反应温度、反应时间等对氧化反应的影响。最佳工艺条件为:磷钨酸的负载量为30%,催化剂用量3.3%,n(2-氯吡啶):n(H_2O_2)=1:6.0;反应温度为80℃;反应时间为30 h,收率高达89.8%。
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| 关 键 词： | 二氧化硅 磷钨酸 2-氯吡啶 2-氯吡啶-N-氧化物 |
SYNTHESIS OF 2-CHLOROPYRIDINE-N-OXIDE ON SUPPORTED PHOSPHOTUNGSTIC ACID CATALYST |
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| Qiu Tao,Zhao Hongxu,Lü Xinyu.SYNTHESIS OF 2-CHLOROPYRIDINE-N-OXIDE ON SUPPORTED PHOSPHOTUNGSTIC ACID CATALYST[J].Speciality Petrochemicals,2010,27(1). |
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| Authors: | Qiu Tao Zhao Hongxu Lü Xinyu |
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| Affiliation: | Qiu Tao,Zhao Hongxu and L(u|¨) Xinyu (Institue of Fine Chemicals,Jiangsu Polytechnic University,Changzhou 213164,Jiangsu,China) |
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| Abstract: | Phosphotungstic acid immobilized on silicon dioxide is prepared as catalyst.2-Chloropyridine -N-oxide is synthesized from 2-chloropyridine,H_2O_2 and catalyst.By single factor experiment, effects of mass fraction of phosphotungstic acid,catalyst dosage,molar ratio of reactants,reaction temperature and reaction time on oxidation is studied.Through repeat examinations,the optimal reaction conditions is mass fraction of phosphotungstic acid 30%,mass of catalyst 3.3%;n(2-chloropyridine) :H(H_2O_2) = 1:6.0;react... |
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| Keywords: | silicon dioxide phosphotungstic acid 2-chloropyridine 2-chloropyridine-N-oxide |
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