催化氨氧化合成2,6-二氯苯甲腈  

Synthesis of 2,6-Dichlorobenzonitrile by Catalytic Ammoxidation

作　　者：刁锡华[1] 杨兰英[1] 王小永[1] 王艳辉 李新颖 张江北 

机构地区：[1]河北科技大学化学与制药学院,河北石家庄050018 [2]石家庄化工厂,河北石家庄050031

出　　处：《河北科技大学学报》2000年第2期4-8,共5页Journal of Hebei University of Science and Technology

基　　金：河北省自然科学基金资助项目(298198)

摘　　要：研究了以２，６－二氯甲苯为原料，催化氨氧化合成２，６－二氟苯甲腈，制备和筛选了性能优良的 Ｐ－Ｖ－Ｍｏ－Ｃｒ－Ｋ－Ｏ／γ－Ａｌ２Ｏ３氨氧化反应催化剂。经过 ２４０ ｈ催化剂寿命的初步实验，催化剂活性、选择性不降低。在 φ３２ ｍｍ×３ ｍｍ单管反应器中进行了氨氧化反应条件优化研究，反应温度 ３６０ Ｃ，接触时间 １０ Ｓ，氧气对 ２，６－二氯甲苯物质的量比为３时，２，６－二氯甲苯转化率９２．２％，２，６－二氯苯甲腈收率７７．６％，纯度为９８．７％。A Process for producing 2, 6-dichlorobenzonitrile by catalytic ammoxidation of 2, 6- dichlorotoluene as raw material is studied. The P-V-Mo-Cr-K--O/r-Al2O3 ammoxidation reaction catalysts with good function are preparated and choisen. After 240 h preliminary life test of the catalysts indicates that their activity and selectivity don't decreased. In φ32 mm × 3 mm single tube reactor the optimizations of ammoxidation reaction condition are studied; the conversion of 2, 6-dichlorotoluene is 96. 4%, the yild of 2, 6- dichlorobenzonitrile is 77. 6%,the purity of 2, 6-dichlorobenzonitrile is 98. 6 %,wherein the reaction temperature is 360 ℃,the contact time is 10 s and the molar ratio of oxigen to 2,6-dichlorotoluene is 3.

关 键 词：二氯苯甲腈 氨氧化 催化剂 催化 农药 中间体 

分 类 号：TQ246.7[化学工程—有机化工] TQ450.4