Indolylimidazole ring-containing natural and synthesized compounds have shown vast biological activities. These indolylimidazole contain both indole imidazole rings. The structure resembling 1a-1d 2a-2d were by a green efficient one-pot four components condensation of indole-3-carbaldehyde, benzil, ammonium-acetate, substituted amines under microwave irradiation using Amberlyst A-15 as recyclab...

A systematic comparison of the use trioxane and depolymerized paraformaldehyde as formaldehyde precursors for acetalization methanol to dimethoxymethane was performed, using acidic ion exchange resin, Amberlyst 15, catalyst. Experiments were carried out under isothermal conditions in batch continuous fixed-bed reactors. The influence main operating parameters, temperature (80–120 °C), space tim...

The aim of this study was to develop an effective carbonaceous solid acid for synthesizing green fuel additive through esterification of lignocellulose-derived levulinic acid (LA) and n-butanol. Two different sulfonated carbons were prepared from glucose-derived amorphous carbon (GC400) and commercial active carbon (AC400). They were contrastively studied by a series of characterizations (N2 ad...

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...

The kinetics of the simultaneous syntheses ethyl tert-butyl ether (ETBE) and butyl (BTBE) over Amberlyst™ 35 (A35) has been studied at 315–353 K in liquid phase. Different kinetic modeling approaches—namely, empirical power-law modeling, mechanistic based on Langmuir-Hinshelwood-Hougen-Watson (LHHW) Eley-Rideal (ER) formalisms, information-based modeling—have compared. Empirical equations yield...

A new green synthesis and anti-tumor activity of the series of bis (3-arylimidazolidinyl-1) methanes 1 6 are described. The compounds were synthesized from the corresponding N-arylethylenediamine and trioxane as sources of formaldehyde and the reactions were performed in heterogeneous phase catalyzed by an acidic ion-exchange resin (Amberlyst 15). The compounds were tested with the Sulforhodami...

The development of a reactive distillation process for the production of n-butyl acetate by transesterification of methyl acetate with n-butanol is presented. Thermodynamic aspects of the quaternary system n-butyl acetate – n-butanol – methyl acetate – methanol are discussed and UNIQUAC interaction parameters derived using the Dortmund Data Bank (DDB) are given. The reaction kinetics of the het...

1. A method is described for the quantitative isolation of bile acids from cellular material. Homogenates of rat liver are freeze-dried and extracted exhaustively with 95% (v/v) ethanol containing 0.1% (v/v) of aq. ammonia (sp.gr. 0.88) and purified by anion-exchange chromatography on Amberlyst A-26. 2. The extracted bile acid conjugates are subjected to either of two hydrolytic procedures, one...

A three compartment solar formic acid generator was built using a Sn on Cu foam cathode and NiFe anode. bipolar combination of Fumasep FAD-PET-75 Nafion 117 membrane mounted between anode middle compartment, which filled with Amberlyst 15H ion exchanger beads. separated the from cathode. The powered photovoltaic panel fed gaseous CO 2 water. Diluted solution produced by flowing water through co...

Acid catalysts including Amberlyst 15 and sulfuric acid were used for heterogeneous homogeneous catalyst reactions respectively, to reduce high free fatty (FFA) in sludge palm oil (SPO) using an esterification process. The goal of this research was FFA content SPO less than 1 wt.% so that it can be employed as a raw material transesterification process produce biodiesel. is eco-friendly with ma...