Abstract

Preparation of sulfonated carbon catalyst from ptoluenesulfonic acid/fructose for the beckmann rearrangement of ketoximes

Author(s): Hong-ping Zhang, Xue-wen Ma, Hong-fang Xiao, Kui-xiang Shen

A sulfonated carbon catalyst was conveniently prepared via multistep processes, involving the polymerization of fructose with p-toluene sulfonic acid (TsOH), followed by the oxidation with H2O2 and then the sulfonation and cabonazation with concentrated sulfuric acid. FT-IR spectroscopy indicated that such carbon material consists of aromatic carbon sheets bearing -SO3H, -COOH and phenolic -OH groups. Notably, the addition of oxidation treatment in the preparation of carbon catalyst can obviously enhance the densities of -SO3H groups (3.01 mmolg-1) and total H+ sites (6.13 mmolg-1), as supported by thermogravimetry and chemical titration analyses. As a result, such catalyst with numerous hydrophilic groups showed a high catalytic activity and an excellent repeatability for the Beckmann rearrangement of hydrophilic ketoximes


Share this       

Share this Page.

Table of Contents

Scimago Journal Rank

Flyer
izmir escort izmir escort bursa escort antalya escort izmir escort porno porno izle türk porno eskişehir escort bartın escort burdur escort izmir escort bursa escort porno indir izle istanbul escort istanbul escort bayan escort izmir