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Vapor phase acylation of phenol with ethyl acetate over H3PO4/TiO2-ZrO2

Paper ID Volume ID Publish Year Pages File Format Full-Text
44416 46025 2007 8 PDF Available
Title
Vapor phase acylation of phenol with ethyl acetate over H3PO4/TiO2-ZrO2
Abstract

ZrO2-TiO2 mixed oxides with a Ti and Zr molar ratio of 1/1 were prepared with and without surfactant by the sol–gel method. Catalysts containing 5–35% H3PO4 were prepared using these mixed oxides and the catalytic performance of each material for vapor phase acylation of phenol to 2-hydroxy acetophenone (2-HAP) was determined. During the reaction of phenol with ethyl acetate, 2-HAP was found to be the major product, when 4-hydroxy acetophenone was not detected in the product stream; phenylacetate (PA) and alkylated products were the minor products. In the best experimental conditions, the alkylated products were less than 0.5%. This reaction may represent an environmentally friendly alternative to use the ethyl acetate as the acylating reagent. The feed molar ratios of phenol/ethyl acetate were varied over a wide range (1–0.1), and the optimum feed ratio of phenol/ethyl acetate was 1:3. Space velocity employed in phenol acylation reported as WHSV (phenol) = 1.35 h−1. The acylation reactions were carried out in the temperature range of 473–673 K and the optimum H3PO4 content for acylation was 15 wt.% H3PO4.

Graphical abstractVapor phase acylation of phenol with ethyl acetate over 15 wt.% H3PO4/TiO2-ZrO2-surf has been investigated. In this reaction, 2-hydroxy acetophenone was found to be the major product when 4-hydroxy acetophenone was not detected in the product stream; phenyl acetate and alkylated products were the minor products. Figure optionsDownload full-size imageDownload as PowerPoint slide

Keywords
Vapor phase; Acylation; Phenol; Ethyl acetate; Hydroxy acetophenone; Environmentally friendly
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Vapor phase acylation of phenol with ethyl acetate over H3PO4/TiO2-ZrO2
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Publisher
Database: Elsevier - ScienceDirect
Journal: Applied Catalysis A: General - Volume 320, 22 March 2007, Pages 35–42
Authors
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Subjects
Physical Sciences and Engineering Chemical Engineering Catalysis
Get Full-Text Now
Don't Miss Today's Special Offer
Price was $35.95
You save - $31
Price after discount Only $4.95
100% Money Back Guarantee
Full-text PDF Download
Online Support
Any Questions? feel free to contact us