Results 21 to 30 of about 1,521 (129)

Ketal Protection of Glycerol for Selective Electrosynthesis of Glyceric Acid in Highly Alkaline Media

Angewandte Chemie, Volume 138, Issue 36, 1 September 2026.
Using a ketal‐protected glycerol derivative (solketal) as the oxidation substrate enables site‐selective electrooxidation that suppresses C–C cleavage on non‐noble catalysts. Highly alkaline conditions promote reactive solketal alkoxide formation, weaken the Cα─H bond to facilitate dehydrogenation, and buffer local acidification, enabling a record‐high
Jiamin Wang, Baokun Zhang, Kanglei Pang, Egon Campos dos Santos, Hong Liu, Mats Johnsson, Xiaowen Yu   +6 more
wiley   +2 more sources

Coumarin Derivatives Solvent-Free Synthesis under Microwave Irradiation over Heterogeneous Solid Catalysts

Molecules, 2017
A suitable methodology of synthesis of coumarin derivatives by Pechmann reaction over heterogeneous solid acid catalysts in a free solvent media under microwave irradiation is described.
Souad Bouasla, Juan Amaro-Gahete, Dolores Esquivel, M. Isabel López, César Jiménez-Sanchidrián, Mabrouk Teguiche, Francisco J. Romero-Salguero   +6 more
doaj   +1 more source

Influência da mono-hidrogenação da fração C5 na síntese do TAME usando Amberlyst 15 como catalisador

Acta Scientiarum: Technology, 2001
No presente trabalho, foi estudada a síntese do TAME, em fase líquida, a partir de uma fração C5 e metanol, utilizando Amberlyst 15 como catalisador. A fração C5 utilizada possui uma diolefina, que tem uma alta tendência à formação de gomas e um alto ...
Gilberto da Cunha Gonçalves, Fernando Cesar Gazola, Maria Angelica Simoes Dornellas de Barros, Pedro Augusto Arroyo   +3 more
doaj   +2 more sources

Heterogeneous Esterification of Free Fatty Acids of Macauba pulp oil (Acrocomia aculeata) in ethanol

Semina: Ciências Exatas e Tecnológicas, 2014
This study aimed to evaluate the utilization of KSF clay and Amberlyst®15 resin as catalysts in esterification reaction of free fatty acids (FFAs) from Macauba pulp oil in ethanol.
Talita Amábile S. Colonelli, Camila da Silva   +1 more
doaj   +1 more source

The Effect of Co-solvent on Esterification of Oleic Acid Using Amberlyst 15 as Solid Acid Catalyst in Biodiesel Production

MATEC Web of Conferences, 2018
The oleic acid solubility in methanol is low due to two phase separation, and this causes a slow reaction time in biodiesel production. Tetrahydrofuran as co-solvent can decrease the interfacial surface tension between methanol and oleic acid.
Ridwan Iwan, Ghazali Mukhtar, Kusmayadi Adi, Diwansyah Putra Resza, Marlina Nina, Andrijanto Eko   +5 more
doaj   +1 more source

Acid-Modified Clays for the Catalytic Obtention of 5-Hydroxymethylfurfural from Glucose

ChemEngineering, 2022
5-hydroxymethylfurfural (5-HMF) is an important platform molecule for the synthesis of high-added value products. Several synthesized clay materials, such as mesoporous hectorite and fluorohectorite, in addition to commercial montmorillonite K-10, have ...
Vladimir Sánchez, María Dolores González, Pilar Salagre, Yolanda Cesteros   +3 more
doaj   +1 more source

Advances in Sustainable Production of Bio‐Derived 5‐Alkoxymethylfurfural and Levulinate Esters: A Comprehensive Review

Carbon Energy, EarlyView.
The present review discusses the advancement in the catalytic synthesis of 5‐alkoxymethylfurfural (AMF) and levulinate esters (LEs) from the aspects of catalytic systems, reaction mechanisms, product isolation, and techno‐economic analysis, supplying valuable insights toward future sustainable and efficient manufacture of AMF and LEs. ABSTRACT The huge
Jun Zhang, Chunxiang Yang, Yuhe Liao, Jiawei Wang, Chengyu Li, Rui Shan, Haoran Yuan   +6 more
wiley   +1 more source

Efficient solvent-free microwave-aided synthesis of flavor ester of ethyl lactate: A comparative study with conventional and ultrasound methods

Applied Food Research
Due to the growing interest in the production of flavor esters with a variety of applications in global markets, this work proposed an efficient and practical catalyst solvent-free microwave-aided esterification (MAE) method to produce ethyl lactate.
Zahra Attarzadeh, Mohammad-Taghi Golmakani, Seyed Mohammad Hashem Hosseini, Ali Reza Sardarian, Fatemeh Ghiasi   +4 more
doaj   +1 more source

Learning Strategies from Nature's Blueprint to Cyclic Carbonate Synthesis

ChemSusChem, Volume 18, Issue 6, March 15, 2025.
The development of sustainable synthetic methods for cyclic carbonates draws inspiration from nature, focusing on eco‐friendly processes and renewable resources like CO2 and biomass. This review explore various CO2 activation mechanisms, green chemistry principles, and green catalysts.
Erika Saccullo, Vincenzo Patamia, Chiara Zagni, Antonio Rescifina, Giuseppe Floresta   +4 more
wiley   +1 more source

A Simple Pseudo-Homogeneous Reversible Kinetic Model for the Esterification of Different Fatty Acids with Methanol in the Presence of Amberlyst-15

Energies, 2018
Fatty acid esterification with alcohols is a crucial step in biodiesel synthesis. Biodiesel consists of long-chain alkyl esters that derive from the transesterification or hydro-esterification of the triglycerides that are contained in vegetable oils. In
Mauro Banchero, Giuseppe Gozzelino
doaj   +1 more source