连续合成N-(1-乙基丙基)-3,4-二甲基苯胺的催化剂及其性能研究  

Catalyst preparation for continuous synthesis of N-(1-ethylpropyl)-3,4-dimethylaniline and its catalytic preformance

作　　者：晁哲 郑金欣 王雷 程杰 范嘉煊 马晓云 高明明 林涛 张炳亮 李国斌 张力 Chao Zhe;Zheng Jinxin;Wang Lei;Cheng Jie;Fan Jiaxuan;Ma Xiaoyun;Gao Mingming;Lin Tao;Zhang Bingliang;Li Guobin;Zhang li(Kaili Catalyst&New Materials Co.,Ltd.,Xi’an 710201,Shaanxi,China;Shaanxi Key Laboratory of Catalytic Materials and Technology,Xi’an 710201,Shaanxi,China;National&Local Joint Engineering Research Center for New Noble Metal Catalysts R&D Technology,Xi’an 710201,Shaanxi,China;Xian Key Laboratory of Catalytic Materials and Technology,Xi’an 710201,Shaanxi,China)

机构地区：[1]西安凯立新材料股份有限公司,陕西西安710201 [2]陕西省催化材料与技术重点实验室,陕西西安710201 [3]新型贵金属催化剂研发技术国家地方联合工程研究中心,陕西西安710201 [4]西安市催化材料与技术重点实验室,陕西西安710201

出　　处：《工业催化》2024年第8期74-80,共7页Industrial Catalysis

摘　　要：以3,4-二甲基硝基苯、3-戊酮和氢气为原料,通过自制自动化固定床反应器进行连续加氢和烷基化反应,探索N-(1-乙基丙基)-3,4-二甲基苯胺连续化生产的新工艺,系统考察Sn改性及活性组分铂前驱体对催化剂性能的影响,同时考察反应条件对原料转化率和产物选择性的影响。研究表明,Sn掺杂改性及通过使用氯铂酸钾作为活性组分前驱体可使PtSn/C催化剂活性增加,稳定性增强。在反应温度70℃、反应压力1.5 MPa和氢气原料物质的量比为10条件下,3,4-二甲基硝基苯转化率和N-(1-乙基丙基)-3,4-二甲基苯胺选择性最高,连续运行50 d产物收率均稳定在99%以上。本研究为绿色除草剂二甲戊灵的应用提供了技术支持。In this paper,3,4-dimethylnitrobenzene,3-pentanone and hydrogen were used as raw materials to continuously carry out hydrogenation and alkylation reaction in self-made automatic fixed bed reactor,and a new process for continuous production of N-(1-ethylpropyl)-3,4-dimethylaniline was explored.The effects of Sn modification and active component platinum precursor on catalyst performance were systematically investigated.The effects of reaction conditions on the conversion of raw materials and the selectivity of products were also investigated.Studies have shown that Sn doping modification and the use of potassium chloroplatinate as the precursor of active component can increase the activity and stability of PtSn/C catalyst.The conversion of 3,4-dimethylnitrobenzene and selectivity of N-(1-ethylpropyl)-3,4-dimethylaniline were the highest when the reaction temperature was 70℃,the reaction pressure was 1.5 MPa and the molar ratio of hydrogen to material was 10.The product yield was stable above 99%after continuous operation for 50 days.This study provided technical support for the application of green herbicide dimepentaline.

关 键 词：精细化学工程 N-(1-乙基丙基)-3 4-二甲基苯胺 3 4-二甲基硝基苯 催化加氢 铂锡碳 

分 类 号：TQ426.94[化学工程] TQ246.31