【摘要】 对氨氧化法制备间苯二腈催化剂进行了研究. 在“微反-色谱”联用装置上完成催化剂的评比和筛选后,在内径30 m m 的石英管固定床反应器上印证并进行工艺条件实验. 考察了反应温度、氨比、空气比和空速对反应的转化率,摩尔收率和选择性的影响. 在所确定的工艺条件下使用m -509 号催化剂,转化率高达99.8% 、摩尔收率70.4% ,生成的间苯二腈为白色针状结晶,纯度高于98.5% . 在湖南南天实业股份有限公司的560 m m 工业流化床反应塔上进行了为期6 个月的工业性试验,摩尔收率达66.5% ,间苯二腈含量高于98% ,单腈含量低于0.25% ,性能优于现行工业催化剂.更多还原

【Abstract】 A new ammoxidation catalyst of m \|xylene to produce isophthalonitrile which is a key intermediate of pesticide was studied. Having appraised and screened catalysts on an apparatus of “microreactor\|chromatograghy”, the further experiments confirming performance of the catalyst and finding the optimum technological conditions were carried out by using a fixed\|bed reactor made of quartz (ID 30 mm). The effects of temperature, the ratio of ammonia, the ratio of air and the space velocity of catalyst upon the conversion, molar yield and selectivity of the reaction were observed, respectively. Using catalyst of m\|509 catalyst, on the suitable conditions, the highest conversion is 99.8%, molar yield is 70.4%. The isophthalonitrile obtained is white needle crystal with the purity higher than 98 5%. The industrial test, lasting 6 months, was run in a fluidized bed reactor (ID 560 mm ) in Hunan Nantian Co. Ltd. The yield was 66.5%, and the purity was above 98.0%. The results indicate that m\|509 catalyst is better than the NT\|1 catalyst that is using in Hunan Nantian Co. Ltd.更多还原