Isopropylation of Naphthalene over β Zeolite

Shiao Jung Chu; Yu Wen Chen

doi:10.1021/ie00036a028

Isopropylation of Naphthalene over β Zeolite

Shiao Jung Chu, Yu Wen Chen

Department of Chemical and Materials Engineering

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Abstract

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 language	English
Pages (from-to)	3112-3117
Number of pages	6
Journal	Industrial and Engineering Chemistry Research
Volume	33
Issue number	12
DOIs	https://doi.org/10.1021/ie00036a028
State	Published - 1 Dec 1994

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title = "Isopropylation of Naphthalene over β Zeolite",

abstract = "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.",

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T1 - Isopropylation of Naphthalene over β Zeolite

AU - Chu, Shiao Jung

AU - Chen, Yu Wen

PY - 1994/12/1

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N2 - 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.

AB - 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.

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JO - Industrial and Engineering Chemistry Research

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ER -

Isopropylation of Naphthalene over β Zeolite

Abstract

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