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

作者:Zheng Hua;Tian Gui;Li Zhao;Hong Min;Jia Ben;Li Wei;Qi Hu 刊名:中国化学快报:英文版 上传者:高峥

【摘要】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 propene 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.

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