Catalysis in Brazil
Special Issue Catalysis
José R. Gregório; Bauer C. Ferrera; Rodrigo dos S. Fuscaldo; Roberto F. de SouzaHow to cite this article
Isabel Vicente; Katia Bernardo-Gusmão; Michèle O. de Souza; Roberto F. de SouzaHow to cite this article
Two competing reactions depending on the concentration of co-catalyst and Ni complex: propylene oligomerization or Friedel-Crafts alkylation with toluene (solvent).
Gábor Laurenczy; Paul J. DysonHow to cite this article
Hydrogen/energy storage in the formic acid/carbon dioxide system.
Aline C. dos Ouros; Michèle O. de Souza; Heloise O. PastoreHow to cite this article
Nanocomposite production requires the fillers randomly dispersed on polymer matrix. In situ procedure combined with an ideal choice of catalyst/support promote the production of a material with improved properties for many applications.
André F. P. Biajoli; Cristiane S. Schwalm; Jones Limberger; Thiago S. Claudino; Adriano L. MonteiroHow to cite this article
This review is intended to give a picture of the applications of Pd-catalyzed C-C cross-coupling reactions for the synthesis of drug components or drug candidates, regardless of the scale, from 2011 through to the end of July, 2014.
Michele Aresta; Angela DibenedettoHow to cite this article
The need for a better carbon management is pushing away from the linear-carbon economy (LCE) towards carbon recycling (CR). This paper discusses the valorization of selected low-value carbon streams such as low-alkanes, CO2, residual biomass and process glycerol.
Jean M. R. Gallo; José M. C. Bueno; Ulf SchuchardtHow to cite this article
In this critical review, it is discussed the development of heterogeneous catalysts for the conversion of ethanol into commodity chemicals
Wenhong Yang; Toshiaki Taniike; Minoru Terano; Yan Chen; Wen-Hua SunHow to cite this article
The 2-methyl-8-(benzimidazol)quinolyliron(II) pre-catalyst is investigated by the density functional theory (DFT) calculations to illustrate the mechanism of ethylene polymerization along with understanding the intermediates in the processes of chain propagation and transfer.
Aline S. Aquino; Franciele L. Bernard; Michele O. Vieira; Jéssica V. Borges; Marisol F. Rojas; Felipe Dalla Vecchia; Rosane A. Ligabue; Marcus Seferin; Sonia Menezes; Sandra EinloftHow to cite this article
A system constituted by a fluorinated ionic liquid plus ZnBr2 is presented as a new approach to perform effective CO2 capture and conversion.
Grasiela Gheno; Nara R. S. Basso; Marco A. Ceschi; Jessie S. Costa; Paolo R. Livotto; Griselda B. GallandHow to cite this article
Novel synthetic route of isopropylmaltol from furfural in five steps and complexation with TiCl4 giving a new post-metallocene catalyst. The novel complex was active in homogeneous ethylene polymerization, giving high density polyethylene with high molecular weight.
Priscilla S. Lima; Leonildo A. Ferreira; Luiza H. Freitas; Martin W. Rheinheimer; Yuri C. A. Sokolovicz; Henri S. SchrekkerHow to cite this article
An unsaturated vegetable oil was used as model substrate for the preparation of biofuels via an olefin metathesis-transesterification-hydrogenation sequence.
Darío J. Segobia; Andrés F. Trasarti; Carlos R. ApesteguíaHow to cite this article
Ni/SiO2 activity and selectivity for the synthesis of n-butylamine from butyronitrile hydrogenation greatly depends on the solvent nature. In non-polar solvents, the solvent-catalyst interaction strength determines the selectivity to n-butylamine: the stronger the solvent-catalyst interaction the higher the n-buylamine yield.
Brenno A. D. Neto; Alberto A. R. Mota; Claudia C. Gatto; Giovanna Machado; Maíra Fasciotti; Heibbe C. B. de Oliveira; Davi A. C. Ferreira; Otavio Bianchi; Marcos N. EberlinHow to cite this article
The supramolecular interactions and organizational features of a task-specific ionic liquid derived from the natural kojic acid have been investigated by a set of techniques formed by single-crystal X-ray diffraction, nuclear magnetic resonance (NMR) spectroscopy, UV-Vis spectrophotometry, conductivity measurements, small angle X-ray scattering (SAXS), electrospray (tandem) mass spectrometry (ESI-MS(/MS)), and theoretical calculations.
Cláudia A. Figueira; Alejandro F. G. Ribeiro; Clara S. B. Gomes; Anabela C. Fernandes; Linda H. Doerrer; Pedro T. GomesHow to cite this article
The complex [Ni(η5-C5H5)(mesityl-BIAN)]PF6 catalyses the polymerization of ethylene when activated by methylaluminoxane (MAO).
Melquizedeque B. Alves; Fernando C. M. Medeiros; Marcelo H. Sousa; Joel C. Rubim; Paulo A. Z. SuarezHow to cite this article
Magnetic mixed iron/tin oxide nanoparticles were used as catalysts in relevant reactions for biodiesel production technologies.
Janeth Navarro; Marta Martín; Eduardo SolaHow to cite this article
The dihydride [IrH2(NCMe)3(PiPr3)]BF4 provides access to potential intermediates in hydrogenations catalyzed by Crabtree-type homogeneous catalysts, thus allowing experimental assessment of likely hydrogenation sequences.
Renata C. de Souto; Nilton Rosenbach Jr; Claudio J. A. MotaHow to cite this article
Calculations on the catalytic activity of different R2Sn(OCH3)3 species on the reaction between CO2 and methanol to afford dimethylcarbonate and water.
Shirley Nakagaki; Kelly A. D. F. Castro; Geani M. Ucoski; Matilte Halma; Vanessa Prévot; Claude Forano; Fernando WypychHow to cite this article
This work reports the preparation of the solid catalyst based immobilization of ironporphyrin on macroporous layered double hydroxides (LDHs) prepared by the co-precipitation method, which involved the use of polystyrene as template, oxides reconstruction, and exfoliation. Application of the solid as catalysts in (Z)-cyclooctene and cyclohexane oxidation will help to assess their catalytic activity.
Hugo A. Oliveira; Dante F. Franceschini; Fabio B. PassosHow to cite this article
In this paper, carbon nanotubes were produced by methane vapor deposition on Co/γ-Al2O3 catalyst. The properties of the catalyst and reaction conditions influenced carbon nanotube selectivity.
Stéphane Chambrey; Mahboubeh Poor Kalhor; Henry Chermette; Danielle Ballivet-TkatchenkoHow to cite this article
DFT calculations coupled with experimental kinetics reveal recycling active dibutyltin(IV) species correlates with the stability of polynuclear species.
Renata O. da Fonseca; Andressa A. A. da Silva; Matheus R. M. Signorelli; Raimundo C. Rabelo-Neto; Fábio B. Noronha; Rita C. C. Simões; Lisiane V. MattosHow to cite this article
Ni/CePr anode exhibited the lowest carbon formation on CO2 reforming of methane due to its higher oxygen mobility.
Juliana P. Rodrigues; Marcos J. Jacinto; Henrique L. Oliveira; Yuri H. O. Falcão; Paulo A. Z. Suarez; Liane M. RossiHow to cite this article
The catalysed hydrocracking of soybean, castor and palm tree oils by Rh and Ru nanoparticles leads to hydrocarbons suitable for use as "renewable or green diesel".
Glenda A. Carvalho; Elena V. Gusevskaya; Eduardo N. dos SantosHow to cite this article
A recyclable rhodium catalyst anchored in a commercial anion exchange resin was prepared straightforwardly from readily available precursors. The catalyst was used for the hydroformylation or the tandem sequence hydroformylation/acetalyzation of eugenol and estragole.
Fernanda C. de Melo; Roberto F. de Souza; Paulo L. A. Coutinho; Michèle O. de SouzaHow to cite this article
Synthesis of HMF from glucose or fructose using ionic liquid.
Eduardo H. Wanderlind; Elisa S. Orth; Michelle Medeiros; Deise M. P. O. Santos; Eduard Westphal; Hugo Gallardo; Haidi D. Fiedler; Faruk NomeHow to cite this article
A novel hydrophobic nucleophile bearing two imidazole groups enhances the cleavage of a model phosphate triester up to 1700-fold, and the reactions are similarly promoted by both cationic and anionic aqueous micelles.
Ana C. Deiana; Marianela Gimenez; Maria F. Sardella; Karim Sapag; Ana L. S. Masseo; Ana P. C. Teixeira; Maria H. Araujo; Rochel M. LagoHow to cite this article
In this work, activated carbon in form of briquettes, produced from wastes of wine industry, were used in the catalytic oxidation of aqueous sulfide contaminant. The preparation and characterization of the catalyst and its efficiency in the oxidation of sulfide are discussed.
Ruth L. Martins; Martin SchmalHow to cite this article
Scanning electron microscopy images of NiO prepared by different routes resulting in distinct morphologies: nanoflowers for NiO prepared with ethylene glycol, less compacted nanoflowers for NiO prepared by hydrothermal route, and bidimensional rods for NiO prepared using nickel dimethylglyoxyne as precursor.
Camila O. Pereira; Márcio F. Portilho; Cristiane A. Henriques; Fatima M. Z. ZotinHow to cite this article
Biodiesel production from simultaneous transesterification and esterification reactions of non-refined feedstocks, using SnSO4 as catalyst.
Claudio W. Backes; Francine R. Scheffer; Marcelo B. Pereira; Sérgio R. Teixeira; Daniel E. WeibelHow to cite this article
TiO2 nanotube arrays impregnated with riboflavin (vitamin B2) and irradiated with only visible light (λ > 400 nm) produce O2 gas in situ allowing efficient degradation of several dyes.
Tiago B. Silva; Ricardo S. Camargo; Benedito S. Lima-NetoHow to cite this article
[RuCl2(PPh3)2(amine)x]-type complexes, with NH2Ph (1; x = 2), NH2Bz (2; x = 2) and NHBuPh (3; x = 1), in the presence of ethyldiazoacetate (EDA), were investigated for ring-opening metathesis polymerization (ROMP) of cyclic olefins. The reactivity of the complexes according to the electronic density and steric hindrance of the amines as ancillary ligands was discussed. In the series, complex 3 is the most active at 25 °C for 5 min, probably because there is more steric hindrance due to the number and the bulkiness of the amine, even with a lower σ-donor character.
Roger Fréty; Marilia R. Santos; Renan F. Sales; Antonio O. S. Silva; Celmy B. M. Barbosa; Jose G. A. PachecoHow to cite this article
Catalytic pyrolysis of oleic acid decreased oxygenated and increased hydrocarbon products formation. NiO/alumina produced more aromatics than NiO/silica.
Saulo T. F. Grecco; Ernesto A. Urquieta-González; Patrício Reyes; Marcelo Oportus; Maria do Carmo RangelHow to cite this article
The crystallinity of the zeolite and the ordering of the mesoporous phase can be adjusted by the time of seed aging.
Vivian V. Thyssen; Elisabete M. AssafHow to cite this article
Catalytic test of 10Ni30LaSi (I-sim): This catalyst showed the best results for glycerol steam reforming under the test conditions, proving stable and active throughout the reaction time.
Ana H. D. P. S. Ulbrich; Jorge L. S. Milani; Paolo R. Livotto; Jean-François Carpentier; Osvaldo L. Casagrande Jr.How to cite this article
The chromium(III) complexes bearing imino-furfural ligands were synthesized and tested in ethylene oligomerization reactions producing oligomers in the range C4-C12+ with good selectivity for α-olefins.
Online version ISSN 1678-4790 Printed version ISSN 0103-5053
Journal of the Brazilian Chemical Society
JBCS Editorial and Publishing Office
University of Campinas - UNICAMP
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