ELECTROMETRIC STUDIES ON THE 2-HYDROXYNAPHTHALENE SULFONIC ACIDS. PREPARATION OF PURE 2-HYDROXYNAPHTHALENE-6-SULFONIC ACID

1930 ◽  
Vol 52 (1) ◽  
pp. 211-217 ◽  
Author(s):  
Karl H. Engel ◽  
A. Witt Hutchison
Keyword(s):  
Sulfonic Acid ◽  
Sulfonic Acids

Effect of surface acidity on the catalytic activity and deactivation of supported sulfonic acids during dehydration of methanol to DME

2020 ◽  
Vol 44 (39) ◽  
pp. 16810-16820
Author(s):  
Rosanna Viscardi ◽  
Vincenzo Barbarossa ◽  
Daniele Mirabile Gattia ◽  
Raimondo Maggi ◽  
Giovanni Maestri ◽  
...  
Keyword(s):  
Catalytic Activity ◽  
Sulfonic Acid ◽  
Water Resistance ◽  
Surface Acidity ◽  
Acid Catalyst ◽  
Acid Sites ◽  
Sulfonic Acids ◽  
Effect Of Surface

Superiorty of the supported sulfonic acid catalyst in terms of the water resistance and efficiency of the acid sites compared to the commercial reference.

Ball-Milling Synthesis of Sulfonyl Quinolines via Coupling of Haloquinolines with Sulfonic Acids

2021 ◽  
Author(s):  
Xiao-Wen Liu ◽  
Jia-Qian Wang ◽  
Hui Ma ◽  
Qi Zhu ◽  
Long-Yong Xie
Keyword(s):  
Ball Milling ◽  
Sulfonic Acid ◽  
Practical Approach ◽  
Sulfonic Acids ◽  
Metal Solvent

An efficient and practical approach for the synthesis of sulfonyl quinolines via ball milling promoted coupling of haloquinolines with sulfonic acid under metal-, solvent- and additive-free conditions has been developed....

scholarly journals Initial steps in the degradation of benzene sulfonic acid, 4-toluene sulfonic acids, and orthanilic acid in Alcaligenes sp. strain O-1

1990 ◽  
Vol 1 (1) ◽  
pp. 55-64 ◽  
Author(s):  
Thomas Thurnheer ◽  
Daniel Z�rrer ◽  
Otmar H�glinger ◽  
Thomas Leisinger ◽  
Alasdair M. Cook
Keyword(s):  
Sulfonic Acid ◽  
Sulfonic Acids ◽  
Benzene Sulfonic Acid ◽  
Orthanilic Acid

Methylation of polymethylbenzenesulfonic acids by hexamethylbenzene and pentamethylbenzenesulfonic acid in concentrated sulfuric acid

1988 ◽  
Vol 66 (1) ◽  
pp. 162-167 ◽  
Author(s):  
Hans Cerfontain ◽  
Ankie Koeberg-Telder
Keyword(s):  
Sulfuric Acid ◽  
Sulfonic Acid ◽  
Sulfonic Acids ◽  
Substrate Reactivity ◽  
Concentrated Sulfuric Acid

The methylation of a series of polymethylbenzenes (PoMB's) or their sulfonic acids by added hexamethylbenzene (HMB) and pentamethylbenzene-1-sulfonic acid (PeMB-1-S) as reagents in 95.5 and 98.4% H2SO4 as solvent has been studied under homogeneous conditions. HMB effects methylation of 2,4,6-trimethylbenzene-1-sulfonic acid (2,4,6-TrMB-1-S), 2,3,4,6-tetramethylbenzene-1-sulfonic acid (2,3,4,6-TeMB-1-S), and 2,3,5,6-TeMB-1-S, but not of the sulfonic acids of 1,3-dimethylbenzene (1,3-DMB), 1,2,3-TrMB, 1,2,4-TrMB, and 1,2,3,4-TeMB. PeMB-1-S is less reactive as methylating reagent than HMB. The observed substrate reactivity towards methylation by HMB was observed to decrease in the order [Formula: see text], and towards methylation by PeMB-1-S to decrease in the order [Formula: see text]. On the basis of a comparison of these orders of substrate reactivities with those predicted for the series of the PoMB-1-sulfonates and the corresponding PoMB's, it is concluded that the substrate species undergoing methylation are the PoMB's and not the corresponding sulfonates.

Preparation of Pine Char Sulfonic Acids with High Acid Capacity Using Phosphoric Acid as a Dehydration Catalyst

2012 ◽  
Vol 550-553 ◽  
pp. 124-127
Author(s):  
Qiong Xu ◽  
Min Zheng ◽  
Du Lin Yin
Keyword(s):  
Acetic Acid ◽  
Phosphoric Acid ◽  
Sulfonic Acid ◽  
Sulfonic Acids ◽  
High Acid ◽  
Step Procedure ◽  
Excellent Activity ◽  
Acid Loading

A series of pine char sulfonic acids were prepared via a two-step procedure involving phosphoric acid catalytic charring of pine sawdusts and successively sulfonation of the charred precursors. Solid sulfonic acid material prepared in this new route possessed high sulfonic acid loading with 2.36 mmol g-1at the optimal charring conditions of phosphoric acid being 85%, ratio of pine sawdusts and phosphoric acid being 1: 10, charring time being 3 h, charring temperature being 140 °C. Pine char sulfonic acids showed excellent activity in the esterification of n-butanol and acetic acid.

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