Method for synthesizing 3-picoline

• Main Authors: WANG YUNHONG, WANG BAIJUN, LI QIUJU, ZHAO YUN, ZHAO TONGTONG, GAO HAIJUN, DING JINTUN, ZHANG HAO, ZHENG XUE, SHI JIANGANG
• Format: Patent
• Language: Chinese; English
• Published: 06.07.2016
• Subjects: CHEMISTRY; CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION ORPROCESSING OF GOODS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; HETEROCYCLIC COMPOUNDS; METALLURGY; ORGANIC CHEMISTRY; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS; TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINSTCLIMATE CHANGE

The invention discloses a method for synthesizing 3-picoline. The method comprises the following process steps: (1) firstly, pretreating a catalyst ZSM-5, and feeding the catalyst ZSM-5 into a tubular reactor, that is, a tubular reactor with a molecular sieve; (2) respectively heating acrolein, acetone, steam and ammonia to 180-210 DEG C, mixing in a certain ratio, diluting with nitrogen, pressurizing to 2.0-2.4MPa, and feeding through the tubular reactor with the molecular sieve at the speed of 9L/minute; and (3) separating in a cooling tower, and refining, thereby obtaining 3-picoline and pyridine. Compared with the prior art, the method is easy in raw material resource, simple to operate, high in yield and high in recycling time of the catalyst ZSM-5. 一种合成3?甲基吡啶的方法，其工艺步骤为：①首先预处理催化剂ZSM?5并将催化剂ZSM?5装入管式反应器中即装有分子筛的管式反应器，②再将丙烯醛、丙酮、水蒸气和氨分别加热至180-210℃以一定比例混合，经氮气稀释后加压到2.0-2.4MPa，以9L/min的速度通过装有分子筛的管式反应器，③随后通过冷却塔分离，精馏得到3?甲基吡啶和吡啶。与现有技术相比，本发明原料易得、操作简单、收率高且催化剂ZSM?5重复使用次数高。