Results 41 to 50 of about 6,547 (205)

Hidroformilação do oleato de metila catalisada por complexos de ródio

Química Nova, 2012
In this work, we describe the hydroformylation of methyl oleate catalyzed by several rhodium complexes. Parameters including total pressure, phosphorous/rhodium and CO/H2 ratio, temperature and phosphorous ligands were scanned.
Ana Nery Furlan Mendes, Ricardo Gomes da Rosa, José Ribeiro Gregório   +2 more
doaj   +1 more source

Pressure‐Enhanced CO2‐to‐CO Electroreduction on Ag‐Based Catalysts: Industrially Relevant Rates and Mechanistic Insights

Carbon Energy, EarlyView.
Ag‐based catalysts operated under elevated CO2 pressures exhibit markedly enhanced intrinsic activity for CO formation, with OD‐Ag achieving −200 mA cm–2 and 90% FECO at −1.3 VRHE. Mechanistic analysis shows that high pressure strengthens a *COOH‐mediated pathway by increasing intermediate coverage and suppressing hydrogen evolution, establishing CO2 ...
Sheraz Ahmed, Chirong Sun, Yurim Sohn, Muhammad Shakir Hussain, Wooyul Kim, Hyung‐Suk Oh, Jaehoon Kim   +6 more
wiley   +1 more source

Enhanced hydroformylation of 1‐hexene in microbubble media

, 2020
To enhance the gas–liquid mass transfer in the hydroformylation reaction, microbubbles were applied into this typical gas–liquid reaction. Compared with a commercial tube microbubble generator, a fractal microbubble distributor, which was designed based ...
Yuhan Sun, Fei Peng, Jie Zhang, Sun, Y, Peng, F, Zhiyong Tang, Zhang, J, Tang, Z   +7 more
core   +1 more source

Hydroformylation of Olefins With Paraformaldehyde Catalyzed by a Rhodium(I)/Diphosphine/Diphosphoramidite System

European Journal of Organic Chemistry, EarlyView.
A new dual‐ligand rhodium catalytic system based on [RhCl(cod)]2, BINAP or BIPHEP, and a diphosphoramidite ligand enables the hydroformylation of olefins using paraformaldehyde as a syngas surrogate. The system efficiently converts vinyl arenes, alkyl olefins, cyclopentene, and allyl acetate with high activity and regioselectivity.
Carmela G. Arena
wiley   +1 more source

Cationic Cobalt (II) Hydroformylation [PDF]

, 2019
While investigating a bimetallic cobalt hydroformylation catalyst a new class of monometallic cationic cobalt (II) hydroformylation catalyst were discovered.
Hood, Drew Michael
core   +1 more source

Leucaena Oil Functionalized With Osmium Tetroxide as a Precursor for Polyol‐Based Polyurethane

Journal of Polymer Science, EarlyView.
Leucaena leucocephala seed oil is converted into a hydroxyl‐functional biopolyol through OsO4‐mediated dihydroxylation. The resulting biopolyol shows a hydroxyl number of 160–175 mg KOH g−1 and is successfully used to produce flexible, open‐cell polyurethane foams, highlighting a renewable route for converting underutilized biomass into value‐added ...
Giovanni Miraveti Carriello, Lucas Repecka Alves, Guilherme Manassés Pegoraro, Henrique Solowej Medeiros Lopes, Amanda Stefanie Jabur de Assis, Thaís de Agrella Janolla, David Rodrigues Gomes, Diego Aleixo da Silva, Beatriz Merillas, Fabiana Aparecida Lobo, Fabio Minoru Yamaji, Maira de Lourdes Rezende, Aparecido Junior de Menezes, Giovanni Pimenta Mambrini   +13 more
wiley   +1 more source

Computational aspects of hydroformylation [PDF]

, 2015
The influence of transition metal complexes as catalysts upon the activity and selectivity of hydroformylation reactions has been extensively investigated during the last decades.
Kégl, Tamás
core   +1 more source

Silanol nest-assisted Rh nanoparticles inducing homogeneous-like kinetics in heterogeneous hydroformylation

Nano Research
Hydroformylation is a pivotal industrial process for high-value chemicals production. So far, compared with homogeneous systems, heterogeneous hydroformylation allows easier separation and recycling to simplify the operation procedure, however, the ...
Haofeng Chen, Jiahao Wang, Yizhe Liu, Tianli Hui, Tao Zheng, Zhichang Liu, Chunming Xu, Haiyan Liu, Haibo Jin   +8 more
doaj   +1 more source

Rhodium Cluster Catalysts Enable Efficient Catalytic Hydroformylation in Mild Conditions: Cluster Size Dependence

Small, EarlyView.
Nanometer‐sized Rh clusters provide a specific reaction environment that facilitates the balanced co‐adsorption of styrene, CO, and H, thereby promoting hydroformylation. ABSTRACT The size of the reactive metal domain, termed an ‘ensemble’, in supported metal catalysts critically influences their catalytic activity.
Yuki Nakaya, Aoto Okada, Takeyori Tanaka, Ray Miyazaki, Jun‐ya Hasegawa, Shinya Furukawa   +5 more
wiley   +1 more source

Polyhedral oligomeric silsesquioxanes in catalysis and photoluminescence applications [PDF]

, 2009
Cubic Polyhedral Oligomeric SilSesquioxanes (POSS) of general formula Si₈O₁₂R₈ (R = alkenyl, alkoxy, aryl, hydrogen...) have found applications in various fields ranging from biology to chemistry.
Vautravers, Nicolas R.
core   +2 more sources