一种由异丁烯直接催化胺化生产叔丁胺的方法

Method for producing tert-butylamine by direct catalytic amination of isobutene

  • Inventors: WANG RONGFA
  • Assignees: 王荣发
  • Publication Date: March 18, 2015
  • Publication Number: CN-104418754-A

Abstract

本发明涉及一种由异丁烯直接催化胺化生产叔丁胺的方法,其特征在于,其具体步骤为:将烯烃原料和氨连续输入到充填催化剂的列管式固定床反应器直接胺化反应,烯烃原料和氨的进料摩尔比为1∶0.5~1∶4;反应产物经精馏分离,得到纯度99.9%的叔丁胺。本发明过程的分子筛催化剂经元素改性使表面酸性质得到最佳调变,避免了烯烃的聚合,提高了催化剂寿命及反应选择性;由于本发明分子筛催化剂经稀土元素或过渡金属元素以及有机卤化物改性后改善了催化性能,并采用特殊的工艺操作方法,使本发明过程能在较低的反应温度和反应压力下进行,且烯烃的转化率和胺化物的选择性比现有技术有所提高,且催化剂寿命长。
The invention relates to a method for producing tert-butylamine by direct catalytic amination of isobutene, which is characterized by comprising the following steps: continuously injecting an olefin raw material and ammonia into a multitubular fixed bed reactor filled with a catalyst for direct amination reaction, wherein the feed mole ratio of the olefin raw material to ammonia is 1:0.5-1:4; and performing rectification separation of the reaction products to obtain tert-butylamine with purity of 99.9%. In the process of the invention, the molecular sieve catalyst is subjected to element modification so as to realize optimal adjustment of surface acidity, thus polymerization of the olefin is prevented, and the service life and the reaction selectivity of the catalyst are improved. The molecular sieve catalyst used in the invention is modified by rare earth elements or transition metal elements and organic halides and has improved catalytic performance, a special process operation method is adopted, thus the process of the invention is carried out at a low reaction temperature and reaction pressure, the olefin conversion rate and the amide selectivity are improved when compared with the prior art, and the service life of the catalyst is prolonged.

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Cited By (2)

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    CN-105457673-AApril 06, 2016西安近代化学研究所一种胺化催化剂及其制备方法
    CN-106565502-AApril 19, 2017山东玉皇化工有限公司一种用于叔丁胺合成的反应装置