Results 21 to 30 of about 11,475 (180)

Chemical modification of Terminalia catappa L. kernel oil methyl ester using epoxidation-esterification approach, for application as bio-transformer fluid – Physicochemical characterization, kinetics and thermodynamics

Cleaner Chemical Engineering, 2022
Epoxidation-esterification of fatty acid methyl ester obtained from Terminalia catappa L. kernel oil (TCKO), its characterization, kinetics and thermodynamics were the main focus of this study.
Chinedu M. Agu, Kenechi Nwosu-Obieogu, Kingsley A. Ani, Albert C. Agulanna, Solomon O. Iwu-Ejike, Ozioma Onyinye Oguegbu, Matthew C. Menkiti   +6 more
doaj   +1 more source

Speciation, Structural Refinement, and Distribution of Ti Sites in Titanium Silicalite‐1 From 47/49Ti NMR Crystallography at 28.2 Tesla

Angewandte Chemie, EarlyView.
Titanium silicalite‐1 (TS‐1), used in industrial selective oxidation processes, depends on specific, yet still unresolved Ti sites, dispersed within the framework of an MFI‐zeolite. Applying high field (28.2 T) 47/49Ti NMR and 17O NMR spectroscopy for an array of TS‐1 catalysts enables the development of an NMR crystallography protocol and the ...
Christoph J. Kaul, Jonas Koppe, Lukas Lätsch, Michael Wörle, Sadig Aghazada, Jacob B. Holmes, Christina Wartmann, Mingji Zheng, Albrecht Berkessel, Trees De Baerdemaeker, Andrei‐Nicolae Parvulescu, Karsten Seidel, J. Henrique Teles, Alexander V. Yakimov, Christophe Copéret   +14 more
wiley   +2 more sources

Kinetics of the Epoxidation of Geraniol and Model Systems by Dimethyldioxirane

Molecules, 2004
The mono-epoxidation of geraniol by dimethyldioxirane was carried out invarious solvents. In all cases, the product ratios for the 2,3 and 6,7 mono-epoxides werein agreement with literature values.
B. S. Crow, P. C. Vasquez, P. J. Franklin, A. L. Baumstark   +3 more
doaj   +1 more source

NiH‐Catalyzed Enantioconvergent α‐Alkenylation of Carbonyl Compounds via Markovnikov Alkyne Hydronickellation

Angewandte Chemie, EarlyView.
A NiH‐catalyzed α‐alkenylation via Markovnikov hydronickellation of alkynes enables convenient access to α‐chrial β‐methylene carbonyl frameworks that are prevalent in biorelevant molecules. High regio‐ and enantioselectivities have been achieved with excellent functional group tolerance and applicability toward complex structures. The β‐methylene unit
Hyeontaek Nam, Seji Jang, Dongwook Kim, Sangwon Seo   +3 more
wiley   +2 more sources

Amphiphilic peroxo polyoxometalate as reaction control phase transfer catalyst for efficient epoxidation of olefins

Micro & Nano Letters, 2021
A peroxo polyoxometalate‐based catalyst was synthesized, characterized, and employed as a catalyst in the epoxidation of olefins with hydrogen peroxide (H2O2).
Jinghui Wu, Hongwei Zheng, Chi Wang, Xianze Wang, Xiaohong Wang, Mingxin Huo   +5 more
doaj   +1 more source

Epoxidation of Terminalia catappa L. Seed oil: Optimization reaction

South African Journal of Chemical Engineering, 2023
Unsaturated fatty acids contained in vegetable oils can be used as a raw material to produce epoxy through epoxidation reactions. This study aims to obtain the optimum conditions for the epoxidation reaction of Terminalia catappa L. (local name “ketapang”
Erin Ryantin Gunawan, Dedy Suhendra, Petryana Arimanda, Dina Asnawati, Murniati   +4 more
doaj   +1 more source

Engineering Collariella virescens Peroxygenase for Epoxides Production from Vegetable Oil

Antioxidants, 2022
Vegetable oils are valuable renewable resources for the production of bio-based chemicals and intermediates, including reactive epoxides of industrial interest.
Dolores Linde, Alejandro González-Benjumea, Carmen Aranda, Juan Carro, Ana Gutiérrez, Angel T. Martínez   +5 more
doaj   +1 more source

Epoxidation of Methyl Esters as Valuable Biomolecules: Monitoring of Reaction

Molecules, 2023
The paper is focused on the epoxidation of methyl esters prepared from oil crops with various profiles of higher fatty acids, especially unsaturated, which are mainly contained in the non-edible linseed and Camelina sativa oil (second generation).
Martin Hájek, Tomáš Hájek, David Kocián, Karel Frolich, András Peller   +4 more
doaj   +1 more source

Effect of Degumming and Bleaching on the Yield and Quality of Epoxidized Hempseed Oil

ChemEngineering
Crude hemp (Cannabis sativa L.) seed oil (HSO) has a high degree of unsaturation, which has increased its interest in many industrial applications, especially epoxy-resin production.
Tosin Oyewole, Emily Biggane, Niloy Chandra Sarker, Ewumbua Monono   +3 more
doaj   +1 more source

Ca–Ag compounds in ethylene epoxidation reaction

Science and Technology of Advanced Materials, 2019
The ethylene epoxidation is a challenging catalytic process, and development of active and selective catalyst requires profound understanding of its chemical behaviour under reaction conditions.
Iryna Antonyshyn, Olga Sichevych, Alim Ormeci, Ulrich Burkhardt, Karsten Rasim, Sven Titlbach, Marc Armbrüster, Stephan A. Schunk, Yuri Grin   +8 more
doaj   +1 more source