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.

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

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

Synthesis of a Silicalite-1-coated Titanium Silicalite-1 (TS-1) Zeolite and Its Catalytic Activity in Liquid-phase Oxidation

2015 ◽  
Vol 44 (4) ◽  
pp. 477-479 ◽  
Author(s):  
Yusuke Sugiura ◽  
Yuichiro Hirota ◽  
Yoshiaki Uchida ◽  
Norikazu Nishiyama
Keyword(s):  
Catalytic Activity ◽  
Liquid Phase ◽  
Liquid Phase Oxidation ◽  
Titanium Silicalite ◽  
Phase Oxidation

Direct aerobic liquid phase epoxidation of propylene catalyzed by Mn(iii) porphyrin under mild conditions: evidence for the existence of both peroxide and Mn(iv)-oxo species from in situ characterizations

RSC Advances ◽  
2015 ◽  
Vol 5 (38) ◽  
pp. 30014-30020 ◽  
Author(s):  
Yang Li ◽  
Xiantai Zhou ◽  
Shaoyun Chen ◽  
Rongchang Luo ◽  
Jun Jiang ◽  
...  
Keyword(s):  
Liquid Phase ◽  
Selective Oxidation ◽  
Epoxidation Of Propylene ◽  
Mild Conditions ◽  
Excellent Activity ◽  
Liquid Phase Epoxidation

Manganese(iii) porphyrin exhibited excellent activity for the selective oxidation of propylene. Experimental evidences that the generation of peroxide and Mn(iv) oxo species, which was well confirmed by in situ IR, in situ UV and MS.

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

Activity and regenerability of dealuminated zeolite Y in liquid phase alkylation of benzene with 1-alkene

2010 ◽  
Vol 64 (4) ◽  
Author(s):  
Michal Horňáček ◽  
Pavol Hudec ◽  
Andrej Nociar ◽  
Agáta Smiešková ◽  
Tibor Jakubík
Keyword(s):  
Catalytic Activity ◽  
Liquid Phase ◽  
Hydrochloric Acid ◽  
Zeolite Y ◽  
Batch Reactor ◽  
Selective Extraction ◽  
Y Zeolite ◽  
Hy Zeolite ◽  
Alkylation Of Benzene

AbstractHY-zeolite and its deep-bed dealuminated and EFAL-extracted forms were tested in liquid phase alkylation of benzene with 1-hexadecene in a batch reactor at 120°C. Deep-bed dealumination of the HY-sample at 560 °C followed by careful selective extraction of extra-framework aluminium by hydrochloric acid increased the catalytic activity as well as oxidative regenerability of Y-zeolite.

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