超重力反应器中亚硝酸甲酯合成工艺

摘要

In order to improve the regeneration performance of methyl nitrite (MN) and to reduce the production of by-product nitric acid, a high gravity-reactor was adopted to study the regeneration process of nitric oxide (NO) oxidative esterification synthesis of MN. The effects of operating conditions, including gas inlet mode, reaction temperature, molar ratios of CH3OH to NO, and NO to O2 on the yield of MN were investigated, and the appropriate process conditions were obtained. The results showed that MN yield reached more than 96％ at atmosphere pressure when NO and O2 were fed into the reactor separately and mixed at the reaction temperature 30-50 ℃, molar ratio of CH3OH to NO 2-6, molar ratio of NO to O25-7. The pilot tests showed that the results of small scale trials have magnified guiding significance for the scale design and process operation of the MN regeneration.%为改善亚硝酸甲酯再生反应性能,降低副产硝酸的生成量,采用超重力反应器,对一氧化氮氧化酯化合成亚硝酸甲酯再生反应工艺进行了研究,考察了气体的进气方式、反应温度、甲醇与NO物质的量之比(甲醇/NO比)、NO与O2物质的量之比(NO/O2比)对亚硝酸甲酯收率的影响,得到了适宜的工艺条件.结果表明,在常压,NO和氧气采用分别进入反应器内后混合的进气方式,反应温度为30～50℃,甲醇/NO比为2～6,NO/O2比为5～7的条件下,亚硝酸甲酯收率可达96％以上.中试验证结果表明,小试实验结果具有放大指导意义.