Citation: Zheng Hua Tian, Gui Li Zhao, Hong Min Jia, Ben Li, Wei Qi Hu. Preparation of 2,6-diisopropylnaphthalene with recycled process of isomers[J]. Chinese Chemical Letters, ;2008, 19(4): 390-394. doi: 10.1016/j.cclet.2008.01.033 shu

Preparation of 2,6-diisopropylnaphthalene with recycled process of isomers

School of Chemical Engineering, University of Science & Technology Liaoning, Anshan 114051, China

Received Date: 24 October 2007

Fund Project: This project was supported by the Northeast Rejuvenation Strategy Foundation of Anshan City, China (No. 032042).

2, 6-Diisopropylnaphthalene (2, 6-DIPN), as the precursor of important monomer 2, 6-naphthalene dicarboxylic acid, was prepared by hydroisopropylation of refined naphthalene with propene over shape-selective catalyst.Naphthalene conversion of 92% and 2, 6-DIPN selectivity of 64% were obtained.Static melt crystallization was applied to separate and purify 2, 6-DIPN from its isomers, resulted in a product purity of ≥99%.The other isomers were converted into monoisopropylnaphthalene, which also reacted with propcne to form 2, 6-DIPN.A recycled process including hydroisopropylation, separation and transalkylation was established, the yield of 2, 6-DIPN based on naphthalene could be doubled by one cycle operation.
- 2,6-Diisopropylnaphthalene,
- Hydroisopropylation,
- Static melt crystallization,
- Intermolecular transalkylation,
- Recycled process
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