摘要
研究了间二甲苯氨氧化法生产间苯二腈的工业催化剂。在实验室筛选到合适的M -5 0 9催化剂 ,考察了反应温度、氨比、空气比和空速对反应的影响。在最佳工艺条件下 ,反应转化率高达 99 8%、摩尔产率 70 4%。在5 6 0mm工业流化床反应塔上进行了 6个月的工业化试验 ,前 5个月的平均摩尔产率达 6 6 5 % ,产品纯度高于 98% ,单腈摩尔分数低于 0 2 % ,性能优于现行工业催化剂。 5个月后催化剂活性下降较多。对反应前后催化剂表征表明 ,催化剂活性下降的主要原因是活性组份的流失。
Ammoxidation catalyst of m-xylene to prepare m-dicyanobenzene was studied.A suitable M-509 catalyst was selected.The effects of temperature,ammonia ratio,air ratio and space velocity upon conversion,molar yields and selectivity were observed.With M-509 catalyst,under suitable conditions,the highest conversion is 99.8%,with a molar yield of 70.4%.The industrial test,lasting for 6 months,was run in a fluidized bed reactor(ID 560 mm)in Hunan Nantian Co.Ltd.The conversion was 99 8%,the average yield of 5 months was 66 5%,and the purity was above 98 5%,the concentration of 3-methylbenzonitrile was lower than 0 2%.The results indicate that M-509 catalyst is better than the NT-1 catalyst currently employed by Hunan Nantian Co.Ltd.,The activity of M-509 catalyst obviously reduced after 5 months of test.The relative catalysts were characterized.The main reason for the catalyst deactivation is the loss of active components. [
出处
《石油化工》
CAS
CSCD
北大核心
2001年第7期541-544,共4页
Petrochemical Technology
关键词
氨氧化法
间苯二腈
催化剂
表征
活性组份
ammoxidation
m-dicyanobenzene
catalyst
characterization of catalyst
loss of active components
