نتایج جستجو برای: toluene sulfonic acid

تعداد نتایج: 754583  

Moch Sahri Noeroel Widajati,

Background: Toluene is a harmful substance still being used as a solvent and catalyst in many industries that can increase the level of urinary hippuric acid (UHA). This study was designed to examine the level of toluene and UHA among workers of industrial site in seven companies in Sidoarjo, Indonesia and to analyze the risk factors for abnormal UHA. Methods: This study was an analytical cross...

Journal: :The Journal of the Society of Chemical Industry, Japan 1956

امین, محمد مهدی, بشردوست, نصرالله, بهرامی, عبدالرحمن, ریسمانچیان, مسعود, منصوری, فریبا, میرستاری, قوام, کلانتری, اردشیر,

Introduction: Toluene is an organic solvent that it is one of the byproducts in the coke industry. Exposure to toluene causes central nervous system dysfunction and others disorders. Many workers are exposed to toluene due to leakage from tracks. Therefore the aim of this study was to determine the levels of exposure through environmental and biological monitoring of toluene Methods: Air tol...

3-methyl-1-sulfonic acid imidazolium tetrachloroferrate {[Msim]FeCl4} as an efficient sulfur catalyst was prepared and applied, as an efficient catalyst, for the cross-aldol condensation reaction between cycloalkanones and arylaldehydes to give α,αʹ- bis(arylidene)cycloalkanones in high yields and short reaction times at 75 °C under solvent-free conditions. 3-methyl-1-sulfonic acid imidazolium...

Fereydoon Milani Nejad Hassan Ali Mirshahi Mohammad Rahimizadeh

The catalytic oxidation of toluene to benzoic acid in the liquid phase has been studied in an un-stirred tank reactor. Low concentration of acetic acid was added in order to increase the solubility of the catalyst in toluene. The dependence of the rate of reaction on the concentration of toluene catalyst and oxygen pressure was studied. It has been suggested that liquid phase oxidation of t...

Journal: :Biomass Conversion and Biorefinery 2021

Abstract The selective oxidative conversion of seven representative fully characterized biomasses recovered as secondary feedstocks from the agroindustry is reported. reaction system, known “OxFA process,” involves a homogeneous polyoxometalate catalyst (H 8 PV 5 Mo 7 O 40 ), gaseous oxygen, p-toluene sulfonic acid, and water solvent. It took place at 20 bar 90 °C transformed agro-industrial wa...

Journal: :Synthesis 2021

Abstract The peracetalization of a β-hydroxy hydroperoxide derived from methyl oleate was studied using benzaldehyde as model substrate to give the corresponding fatty 1,2,4-trioxane. desired product obtained mixture regioisomers but only one diastereoisomer each formed. nature acid catalyst and both p-toluene sulfonic (PTSA) Amberlyst A35 (A35) were found be efficient homogeneous heterogeneous...

2001
J. Rivera-Utrilla M. Sánchez-Polo C. A. Zaror

Sulfonic aromatic compounds are widely used in the textile industry for the synthesis of azo dyes. The presence of the sulfonic group endows these compounds with high water-solubility and resistance to biological treatment. The present work analysed the efficacy of oxidation with ozone in the treatment of waters containing naphthalene-1-sulfonic acid, naphthalene-1,5-disulfonic acid and naphtha...

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