Isopropylation of Naphthalene over β Zeolite

Shiao Jung Chu, Yu Wen Chen

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30 Scopus citations


Isopropylations of both naphthalene and 2-isopropylnaphthalene (2-IPN) were carried out over β zeolite with various Si to Al ratios. Modification of the β zeolite was also investigated. In the alkylation of naphthalene with isopropyl alcohol, the selectivity of diisopropylnaphthalene isomers (DIPN) was decreased from 60.5% to 25.8% by raising the SiO2/Al2O3 ratio from 25 to 160. However, the fraction of 2,6-diisopropylnaphthalene (2,6-DIPN) exhibited contrary trends. As high as 80% of the 2,6-DIPN fraction in total DIPN was obtained for a SiO2/Al2O3 ratio above 110. The results were correlated with the acidity and the particle size of the corresponding β zeolite. Both ion exchange and chemical vapor deposition (CVD) modification methods reduced the activity of the β zeolite. However, the selectivity of 2,6-DIPN was improved by CVD modification for isopropylation of both naphthalene and 2-IPN.

Original languageEnglish
Pages (from-to)3112-3117
Number of pages6
JournalIndustrial and Engineering Chemistry Research
Issue number12
StatePublished - 1 Dec 1994


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