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化学工业与工程 2010, Vol. 27 Issue (1) :1-6    DOI:
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硝酸改性丝光沸石上合成2,6-二异丙基萘
何广湘;巩雁军;刘艳红;靳海波;窦涛;
中国石油大学(北京)中国石油天然气集团公司催化重点试验室;北京石油化工学院化工系;
Synthesis of 2,6-Diisopropylnaphthalene over H-mordenite Catalyst Modified by Nitric Acid
HE Guang-xiang~ 1,2 , GONG Yan-jun~1,LIU Yan-hong~ 1,2 ,JIN Hai-bo~2, DOU Tao~1(1. The CNPC Key Laboratory of Catalysis, China University of Petroleum (Beijing), Beijing 102249, China; 2.Department of Chemical Engineering, Beijing Institute of Petrochemical Technology, Beijing 102617, China)
(1. The CNPC Key Laboratory of Catalysis, China University of Petroleum (Beijing), Beijing 102249, China; 2.Department of Chemical Engineering, Beijing Institute of Petrochemical Technology, Beijing 102617, China
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摘要 采用HNO3对丝光沸石(HM)进行脱铝改性,并采用固定床反应器对其萘异丙基化反应的性能进行评价,考察了不同脱铝方式和不同Si/Al原子比对改性HM萘异丙基化性能的影响。结果表明,水蒸汽和硝酸处理的催化剂,其B酸与L酸的比例和酸强度分布可发生变化,在保持较好的萘转化率的前提下,提高了2,6-二异丙基萘(2,6-DIPN)的选择性。随着HNO3改性后HM分子筛的Si/Al原子比的增加,催化剂活性逐渐降低,稳定性提高,选择性先提高后降低。适宜的硝酸改性脱铝工艺条件为:HM沸石先经500℃、0.5h-1的空速下高温水蒸汽处理1.0h,再用1.6mol/L的HNO3溶液于45℃下处理24.0h,此时Si/Al原子比为31,2,6-DIPN的产率为7.24%。
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何广湘
巩雁军
刘艳红
靳海波
窦涛
关键词： 萘   异丙基化   2   6-二异丙基萘   丝光沸石     
Abstract： The H-mordenites (HM) was dealuminated by nitric acid leaching. The naphthalene isopropylation reaction performance of the modified HM zeolite catalyst was investigated in a fix-bed reactor. Influences of different dealuminatation methods and Si/Al ratios on catalytic performances were analyzed. The results show that the catalytic selectivity of 2, 6-DIPN is increased after dealuminated by nitric acid leaching. A combination of hydrothermal treatment with nitric acid leaching can remove acid centre effectively, change ratio of B to L acid and acid strength distribution. The selectivity of 2, 6-DIPN is increased without decreasing naphthalene conversion rate. The increase of Si/Al ratio results in a slight decrease of catalytic activity and improvement of stability, the selectivity increased firstly and then decreased with increasing of Si/Al ratio. The optimized operating conditions for zeolite dealuminatation are as follows: HM zeolites is treated in 0.5 h~ -1 steam at 500 ℃ for 1.0 h, then is processed by nitric acid leaching at 45 ℃ for 24.0 h. The corresponding Si/Al ratio is 31 and 2, 6-DIPN yield is 7.24%.
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Received 2010-01-15; published 2010-01-15
引用本文:   
何广湘;巩雁军;刘艳红;靳海波;窦涛;.硝酸改性丝光沸石上合成2,6-二异丙基萘[J].  化学工业与工程, 2010,27(1): 1-6
HE Guang-xiang~ 1,2 , GONG Yan-jun~1,LIU Yan-hong~ 1,2 ,JIN Hai-bo~2, DOU Tao~1.Synthesis of 2,6-Diisopropylnaphthalene over H-mordenite Catalyst Modified by Nitric Acid[J].  Chemcial Industry and Engineering, 2010,27(1): 1-6
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