Alkylation of Benzene on Immobilized Phosphotungstic Acid
Linear alkylbenzenes (LAB) are key intermediates in the synthesis of linear alkylbenzene sulfonate surfactants that are used in the manufacture of detergents. Production of LAB with traditional Lewis acids as catalysts, such as hydrofluoric acid, results in the formation of large amounts of toxic wa...
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ndltd-ETSU-oai-dc.etsu.edu-etd-53382020-12-05T05:04:32Z Alkylation of Benzene on Immobilized Phosphotungstic Acid Kankam, Kofi Linear alkylbenzenes (LAB) are key intermediates in the synthesis of linear alkylbenzene sulfonate surfactants that are used in the manufacture of detergents. Production of LAB with traditional Lewis acids as catalysts, such as hydrofluoric acid, results in the formation of large amounts of toxic wastes and corrosion of industrial equipment. Phosphotungstic acid (PTA) has gained much attention in recent years as a solid catalyst for various alkylation reactions. This research work aims to develop a novel material based on PTA-containing silica gel, which can effectively catalyze LAB synthesis. Sol-gel synthesis of silica gel in the presence of PTA and tetraethyl orthosilicate as precursors produced a mesoporous aterial containing covalently embedded PTA clusters. Obtained superacidic catalyst demonstrated high catalytic activity in liquid-phase alkylation of benzene by various alkenes. Covalent embedding of catalytically active HPA clusters prevents their leaching from the catalyst surface, which enabled its excellent catalytic properties. 2020-12-01T08:00:00Z text application/pdf https://dc.etsu.edu/etd/3847 https://dc.etsu.edu/cgi/viewcontent.cgi?article=5338&context=etd Copyright by the authors. Electronic Theses and Dissertations eng Digital Commons @ East Tennessee State University Alkylbenzenes Sol-gel synthesis Phosphotungstic acid Catalyst Organic Chemistry |
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English |
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Others
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Alkylbenzenes Sol-gel synthesis Phosphotungstic acid Catalyst Organic Chemistry |
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Alkylbenzenes Sol-gel synthesis Phosphotungstic acid Catalyst Organic Chemistry Kankam, Kofi Alkylation of Benzene on Immobilized Phosphotungstic Acid |
description |
Linear alkylbenzenes (LAB) are key intermediates in the synthesis of linear alkylbenzene sulfonate surfactants that are used in the manufacture of detergents. Production of LAB with traditional Lewis acids as catalysts, such as hydrofluoric acid, results in the formation of large amounts of toxic wastes and corrosion of industrial equipment. Phosphotungstic acid (PTA) has gained much attention in recent years as a solid catalyst for various alkylation reactions. This research work aims to develop a novel material based on PTA-containing silica gel, which can effectively catalyze LAB synthesis. Sol-gel synthesis of silica gel in the presence of PTA and tetraethyl orthosilicate as precursors produced a mesoporous aterial containing covalently embedded PTA clusters. Obtained superacidic catalyst demonstrated high catalytic activity in liquid-phase alkylation of benzene by various alkenes. Covalent embedding of catalytically active HPA clusters prevents their leaching from the catalyst surface, which enabled its excellent catalytic properties. |
author |
Kankam, Kofi |
author_facet |
Kankam, Kofi |
author_sort |
Kankam, Kofi |
title |
Alkylation of Benzene on Immobilized Phosphotungstic Acid |
title_short |
Alkylation of Benzene on Immobilized Phosphotungstic Acid |
title_full |
Alkylation of Benzene on Immobilized Phosphotungstic Acid |
title_fullStr |
Alkylation of Benzene on Immobilized Phosphotungstic Acid |
title_full_unstemmed |
Alkylation of Benzene on Immobilized Phosphotungstic Acid |
title_sort |
alkylation of benzene on immobilized phosphotungstic acid |
publisher |
Digital Commons @ East Tennessee State University |
publishDate |
2020 |
url |
https://dc.etsu.edu/etd/3847 https://dc.etsu.edu/cgi/viewcontent.cgi?article=5338&context=etd |
work_keys_str_mv |
AT kankamkofi alkylationofbenzeneonimmobilizedphosphotungsticacid |
_version_ |
1719368276444708864 |