化工学报 ›› 2007, Vol. 58 ›› Issue (8): 1996-2003.

• 催化、动力学与反应器 • 上一篇    下一篇

2,6-二异丙基萘液相空气氧化制2,6-萘二甲酸

靳海波;韩占生;单希林;李达仁;吴志强;杨春育   

  1. 北京石油化工学院化工系
  • 出版日期:2007-08-05 发布日期:2007-08-05

Air oxidation of 2,6-diisopropylnaphthalene to 2,6-naphthalenedicarboxylic acid in liquid phase

JIN Haibo;HAN Zhansheng;SHAN Xilin;LI Daren;WU Zhiqiang;YANG Chunyu   

  • Online:2007-08-05 Published:2007-08-05

摘要: 在1 L钛材反应釜内,采用Co-Mn-Br系催化剂对2,6-二异丙基萘(2,6-DIPN)液相氧化合成2,6-萘二甲酸(2,6-NDCA)的工艺条件进行了研究。采用反相高效液相色谱法分析2,6-萘二甲酸的纯度,考察了催化剂的量、反应温度、压力、原料的进料量、体系的含水量等因素对氧化反应结果的影响,得出了氧化反应较为适宜的操作条件;考察了在含氧气体中添加一定量的CO2和催化剂中加入Ni对氧化反应的影响,结果表明,CO2和Ni都可作为反应促进剂,明显提高产物的收率和纯度。在适宜的工艺条件下,实现了2,6-萘二甲酸的连续化生产,反应稳定后产品纯度可达到95%以上,随反应时间的延长,2,6-NDCA收率由69%提高到73%。

关键词: 2,6-二异丙基萘, 2,6-萘二甲酸, 液相氧化反应, Co-Mn-Br催化剂

Abstract:

The influences of catalyst concentration, reaction temperature and pressure, feed rate, and water content on the liquid phase oxidation of 2,6-diisopropylnaphthalene to 2,6-naphthalenedicarboxylic acid (2,6-NDCA)were studied in a 1 L titanium reactor using air as oxidant, acetic acid as solvent, and a Co-Mn-Br mixture as catalyst, and the optimum operation conditions were obtained in the experimental range.Meanwhile, the promotor effects of individual CO2 and Ni2+ and their combined use on the activity of Co-Mn-Br catalyst were discussed.Based on the results of the batch experiments, a continuous process for making 2,6-NDCA was developed.The yield of 2,6-NDCA increased from 69% to 73% and the purity of 2,6-NDCA could be up to 95% with the increasing of reaction time.

Key words: 2,6-二异丙基萘, 2,6-萘二甲酸, 液相氧化反应, Co-Mn-Br催化剂