Modification of Molecular Sieves USY and Their Application in the Alkylation Reaction of Benzene with Cyclohexene

In this manuscript, ultrastable Y (USY) zeolites are modified employing a liquid‐phase ion exchange method to furnish H‐USY with different properties. Modified with ammonium nitrate, H‐USY could largely improve the conversion in the alkylation reaction of benzene with cyclohexene due to the increase...

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Veröffentlicht in:ChemistrySelect (Weinheim) 2020-08, Vol.5 (29), p.8935-8941
Hauptverfasser: Meng, Fanfei, Ding, Yuansheng, Meng, Wei, Mi, Guangyi, Qiu, Jun
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Ding, Yuansheng
Meng, Wei
Mi, Guangyi
Qiu, Jun
description In this manuscript, ultrastable Y (USY) zeolites are modified employing a liquid‐phase ion exchange method to furnish H‐USY with different properties. Modified with ammonium nitrate, H‐USY could largely improve the conversion in the alkylation reaction of benzene with cyclohexene due to the increase in Brunauer‐Emmett‐Teller (BET) specific surface area, Barrett‐Joyner‐Halenda (BJH) pore volume, BJH pore size, and acidity of H‐USY. Catalyzed by the molecular sieve modified twice with ammonium nitrate, this alkylation reaction demonstrated a 95.3 % conversion of cyclohexene with 97.4 % selectivity of cyclohexylbenzene. And we found that urea‐modified USY has the similar effect, a 96.1 % conversion of cyclohexene with slightly 94.9 % selectivity of cyclohexylbenzene. In this manuscript, ultrastable Y (USY) zeolites are modified employing a liquid‐phase ion exchange method to furnish H‐USY with different properties.Catalyzed by the molecular sieve modified twice with ammonium nitrate, this alkylation reaction demonstrated a 95.3 % conversion of cyclohexene with 97.4 % selectivity of cyclohexylbenzene. And we found that urea‐modified USY has the similar effect, a 96.1 % conversion of cyclohexene with slightly 94.9 % selectivity of cyclohexylbenzene. According to the results of products composition by Gas chromatography ‐ mass spectrometry analysis, we believe that the alkylation of benzene and cyclohexene to generate cyclohexylbenzene, but also many by‐products.
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Modified with ammonium nitrate, H‐USY could largely improve the conversion in the alkylation reaction of benzene with cyclohexene due to the increase in Brunauer‐Emmett‐Teller (BET) specific surface area, Barrett‐Joyner‐Halenda (BJH) pore volume, BJH pore size, and acidity of H‐USY. Catalyzed by the molecular sieve modified twice with ammonium nitrate, this alkylation reaction demonstrated a 95.3 % conversion of cyclohexene with 97.4 % selectivity of cyclohexylbenzene. And we found that urea‐modified USY has the similar effect, a 96.1 % conversion of cyclohexene with slightly 94.9 % selectivity of cyclohexylbenzene. In this manuscript, ultrastable Y (USY) zeolites are modified employing a liquid‐phase ion exchange method to furnish H‐USY with different properties.Catalyzed by the molecular sieve modified twice with ammonium nitrate, this alkylation reaction demonstrated a 95.3 % conversion of cyclohexene with 97.4 % selectivity of cyclohexylbenzene. And we found that urea‐modified USY has the similar effect, a 96.1 % conversion of cyclohexene with slightly 94.9 % selectivity of cyclohexylbenzene. 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And we found that urea‐modified USY has the similar effect, a 96.1 % conversion of cyclohexene with slightly 94.9 % selectivity of cyclohexylbenzene. According to the results of products composition by Gas chromatography ‐ mass spectrometry analysis, we believe that the alkylation of benzene and cyclohexene to generate cyclohexylbenzene, but also many by‐products.</abstract><doi>10.1002/slct.202002320</doi><tpages>7</tpages><orcidid>https://orcid.org/0000-0003-1927-9964</orcidid></addata></record>
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subjects Alkylation
catalysts
cyclohexylbenzene
modified molecular sieve
USY
title Modification of Molecular Sieves USY and Their Application in the Alkylation Reaction of Benzene with Cyclohexene
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