scholarly journals Accessibility enhancement of TS-1-based catalysts for improving the epoxidation of plant oil-derived substrates

2016 ◽  
Vol 6 (19) ◽  
pp. 7280-7288 ◽  
Author(s):  
Nicole Wilde ◽  
Jan Přech ◽  
Marika Pelz ◽  
Martin Kubů ◽  
Jiří Čejka ◽  
...  
Keyword(s):  
Hydrogen Peroxide ◽  
Liquid Phase ◽  
Methyl Oleate ◽  
Model Compound ◽  
Textural Features ◽  
Plant Oil ◽  
Liquid Phase Epoxidation

TS-1-based catalysts with different textural features, namely layered TS-1, pillared TS-1, and Ti-pillared TS-1 as well as mesoporous TS-1, were investigated in the liquid-phase epoxidation of methyl oleate as a model compound for plant oil-derived substrates with hydrogen peroxide at 50 °C.

scholarly journals Continuous Liquid-Phase Epoxidation of Ethylene with Hydrogen Peroxide on a Titanium-Silicate Catalyst

2021 ◽  
Author(s):  
Matias Alvear ◽  
Michele Emanuele Fortunato ◽  
Vincenzo Russo ◽  
Kari Eränen ◽  
Martino Di Serio ◽  
...  
Keyword(s):  
Hydrogen Peroxide ◽  
Liquid Phase ◽  
Titanium Silicate ◽  
Liquid Phase Epoxidation

Liquid Phase Epoxidation of Allylic Compounds with Hydrogen Peroxide at Autogenic and Atmospheric Pressure over Mesoporous Ti- MCM-48 Catalyst

2009 ◽  
Vol 12 (2) ◽  
Author(s):  
Agnieszka Wróblewska ◽  
Eugeniusz Milchert
Keyword(s):  
Hydrogen Peroxide ◽  
Liquid Phase ◽  
Atmospheric Pressure ◽  
Allyl Alcohol ◽  
Molar Ratio ◽  
Technological Parameters ◽  
Liquid Phase Epoxidation

AbstractThe epoxidation of allylic compounds: allyl alcohol, methallyl alcohol and methallyl chloride to corresponding epoxides: glycidol, 2-methylglycidol and 2-methylepichlorohydrin with hydrogen peroxide over Ti-MCM-48 catalyst has been studied. The epoxidation was carried out with 30 wt% hydrogen peroxide in methanol as a solvent under autogenic pressure (in autoclave) and at atmospheric pressure in a glass reactor. The optimal technological parameters and regions of advantageous changes of: temperature, the molar ratio allylic compound/H

Tungsten Oxides-Containing Titanium Silicalite for Liquid Phase Epoxidation of 1-octene with Aqueous Hydrogen Peroxide

2008 ◽  
Vol 128 (1-2) ◽  
pp. 177-182 ◽  
Author(s):  
Didik Prasetyoko ◽  
Hamzah Fansuri ◽  
Zainab Ramli ◽  
Salasiah Endud ◽  
Hadi Nur
Keyword(s):  
Hydrogen Peroxide ◽  
Liquid Phase ◽  
Titanium Silicalite ◽  
Aqueous Hydrogen Peroxide ◽  
Tungsten Oxides ◽  
Liquid Phase Epoxidation

Regularities of glycidol synthesis by the liquid-phase epoxidation of allyl alcohol with hydrogen peroxide

2014 ◽  
Vol 63 (12) ◽  
pp. 2647-2651 ◽  
Author(s):  
A. V. Sulimov ◽  
S. M. Danov ◽  
A. V. Ovcharova ◽  
A. A. Ovcharov ◽  
V. R. Flid
Keyword(s):  
Hydrogen Peroxide ◽  
Liquid Phase ◽  
Allyl Alcohol ◽  
Liquid Phase Epoxidation

scholarly journals Effect of textual features and surface properties of activated carbon on the production of hydrogen peroxide from hydroxylamine oxidation

RSC Advances ◽  
2017 ◽  
Vol 7 (41) ◽  
pp. 25305-25313 ◽  
Author(s):  
Wei Song ◽  
Lin Yu ◽  
Xiaowei Xie ◽  
Zhifeng Hao ◽  
Ming Sun ◽  
...  
Keyword(s):  
Hydrogen Peroxide ◽  
Activated Carbon ◽  
Liquid Phase ◽  
Gas Phase ◽  
Surface Properties ◽  
Textural Features ◽  
Production Of Hydrogen ◽  
Textual Features

Herein, the textural features and surface properties of activated carbon were mediated by oxidation in the gas-phase or liquid-phase.

scholarly journals Epoxidation of Karanja (Millettia pinnata) Oil Methyl Esters in the Presence of Hydrogen Peroxide over a Simple Niobium-Containing Catalyst

Catalysts ◽  
2019 ◽  
Vol 9 (4) ◽  
pp. 344 ◽  
Author(s):  
Nicola Scotti ◽  
Nicoletta Ravasio ◽  
Claudio Evangelisti ◽  
Rinaldo Psaro ◽  
Michele Penso ◽  
...  
Keyword(s):  
Hydrogen Peroxide ◽  
Methyl Oleate ◽  
Methyl Esters ◽  
Catalytic Performance ◽  
Aqueous Hydrogen Peroxide ◽  
Millettia Pinnata ◽  
Subsequent Calcination ◽  
Karanja Oil ◽  
Catalytic Cycles ◽  
Liquid Phase Epoxidation

The synthesis, characterization and catalytic performance of a conceptually simple, novel NbOx-SiO2 catalyst are here described. The niobium(V)-silica catalyst was prepared starting from cheap and viable reactants, by alkaline deposition of NH4Nb(C2O4)2·H2O in the presence of fructose as a stabilizer and subsequent calcination. The NbOx-SiO2 solid (0.95 Nb wt.%) was tested in the liquid-phase epoxidation with aqueous hydrogen peroxide of methyl oleate, as a model substrate. It was then tested in the epoxidation of a mixture of methyl esters (FAMEs) obtained by transesterification with methanol and purification of karanja oil, extracted from the autochthonous Indian variety of Millettia pinnata tree. The catalyst showed a promising performance in terms of methyl oleate conversion (up to 75%) and selectivity to epoxide (up to 82%). It was then tested on the FAME mixture from karanja oil, where interesting conversion values were attained (up to 70%), although with lower selectivities and yields to the mixture of desired epoxidized FAMEs. The solid withstood four catalytic cycles overall, during which a non-negligible surface reorganization of the Nb(V) sites was observed. However, this restructuring did not negatively affect the performance of the catalysts in terms of conversion or selectivity.

scholarly journals PLANT OIL VALORIZATION BY CROSS-METATHESIS REACTIONS: SYNTHESIS OF FINE CHEMICALS FROM METHYL OLEATE

2020 ◽  
Vol 50 (2) ◽  
pp. 139-144
Author(s):  
Andres Trasarti ◽  
Eduardo Gonzalez ◽  
Pablo Nieres ◽  
Carlos Apesteguia
Keyword(s):  
Liquid Phase ◽  
Methyl Oleate ◽  
Catalyst Deactivation ◽  
Side Reaction ◽  
Batch Reactors ◽  
Reactant Ratio ◽  
Fine Chemicals ◽  
Plant Oil ◽  
2Nd Generation ◽  
Cross Metathesis

This work studies the production of high-value compounds by the cross-metathesis of methyl oleate (MO) with ethylene, cinnamonitrile and cinnamaldehyde using the 2nd generation Hoveyda-Grubbs complex (HG) as catalyst, either dissolved in toluene or supported on silica. Reactions were carried out in batch reactors between 313 and 343 K. The yield to cross-metathesis products (YC-M) for the MO cross-metathesis with cinnamonitrile and cinnamaldehyde increased with the initial molar reactant ratio (RCN/MO, RCA/MO), reaching YC-M values of 82% and 95%, respectively, at R = 7. No catalyst deactivation took place during the 400-min catalytic runs.  The liquid-phase cross-metathesis of MO with ethylene (ethenolysis) was performed over HG(10%)/SiO2 catalysts, producing 1-decene and methyl 9-decenoate, a valuable intermediate for the synthesis of pheromones. At RC2/MO = 2.5, the selectivity to ethenolysis products was 77% at 82% MO conversion. The MO self-metathesis was the only side reaction observed in all the catalytic tests.

scholarly journals Influence of Impurities in a Methanol Solvent on the Epoxidation of Propylene with Hydrogen Peroxide over Titanium Silicalite-1

Catalysts ◽  
2019 ◽  
Vol 10 (1) ◽  
pp. 15 ◽  
Author(s):  
Gang Wang ◽  
Yue Li ◽  
Quanren Zhu ◽  
Gang Li ◽  
Chao Zhang ◽  
...  
Keyword(s):  
Hydrogen Peroxide ◽  
Catalytic Activity ◽  
Liquid Phase ◽  
Competitive Adsorption ◽  
Batch Reactor ◽  
Spectroscopic Studies ◽  
Titanium Silicalite ◽  
Trace Impurities ◽  
Epoxidation Of Propylene ◽  
Liquid Phase Epoxidation

The recycled methanol solvent of the HPPO (liquid-phase epoxidation of propylene and hydrogen peroxide to propylene oxide) process usually contains many kinds of trace impurities, such as fusel alcohol, aldehyde, ketone, ester, acetal, and amine. In this study, the influence of these impurities on the catalytic performance of titanium silicalite-1 (TS-1) in the liquid-phase epoxidation of propylene with H2O2 was investigated with a batch reactor and simulated methanol solvents. The results show that amine and acetone are the most hazardous impurities, as they could remarkably suppress the conversion of H2O2. Furthermore, competitive adsorption experiments and IR and UV-Raman spectroscopic studies indicate that the suppression effect of impurities on the catalytic activity of TS-1 can be attributed to the competitive adsorption of the impurities on the tetra-coordination framework Ti sites. With this funding, the suppression mechanism of different impurities in a methanol solvent on the catalytic activity of TS-1 in the liquid-phase epoxidation of propylene was discussed.

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