Highly efficient continuous-flow oxidative coupling of amines using promising nanoscale CeO2–M/SiO2 (M = MoO3 and WO3) solid acid catalysts

RSC Advances ◽  
2016 ◽  
Vol 6 (97) ◽  
pp. 95252-95262 ◽  
Author(s):  
Bolla Govinda Rao ◽  
Putla Sudarsanam ◽  
Baithy Mallesham ◽  
Benjaram M. Reddy
Keyword(s):  
Oxidative Coupling ◽  
Continuous Flow ◽  
Solid Acid ◽  
Catalytic Performance ◽  
Solid Acid Catalysts ◽  
Acid Catalysts ◽  
Highly Efficient

Nanoscale CeO2–MoO3/SiO2 solid acid shows an outstanding catalytic performance in the oxidative coupling of amines under industrially-favourable conditions.

Preparation of chemically uniform and monodisperse microparticles as highly efficient solid acid catalysts for aldol condensation

2018 ◽  
Vol 175 ◽  
pp. 168-174 ◽  
Author(s):  
Jongmin Kim ◽  
Si Hyung Jin ◽  
Kyoung-Ku Kang ◽  
Young-Min Chung ◽  
Chang-Soo Lee
Keyword(s):  
Solid Acid ◽  
Aldol Condensation ◽  
Solid Acid Catalysts ◽  
Acid Catalysts ◽  
Highly Efficient

The Effect of Rare Earth Modification on the Structure and Catalytic Performance of SO42-/ZrO2 Solid Acid Catalysts

2011 ◽  
Vol 287-290 ◽  
pp. 1375-1378
Author(s):  
Ying Chen ◽  
Bao Hui Wang ◽  
Xue Sun ◽  
Hui Li
Keyword(s):  
Rare Earth ◽  
Solid Acid ◽  
Tetragonal Zirconia ◽  
Acid Methyl Ester ◽  
Catalytic Performance ◽  
Solid Acid Catalysts ◽  
Acid Catalysts ◽  
X Ray Diffraction ◽  
Ft Ir ◽  
Xrd Patterns

Rare earth modified SO2-4/ZrO2 solid acid catalysts were prepared by coprecipitation and impregnation methods respectively. The properties of the samples were characterized by XRD (X-ray diffraction), FT-IR (Fourier transform infrared spectroscopy). And their catalytic performances were evaluated and investigated by transesterification of waste oil with methanol. The results showed that the catalyst containing 4% Ce and calcined at 550°C displayed the highest production rate and the better reuse ability than the others. 63.5% yield of fatty acid methyl ester was achieved. An analysis of XRD patterns reveal that the incorporation of rare earth into tetragonal zirconia stabilizes the compound, and the calcination at 550°C increases the reactivity of the catalyst by producing a greater fraction of active tetragonal zirconia. It can be seen from the FT-IR spectra that superacids structures are formed in the catalysts and the acidity is strengthened remarkably and the activated centre of the catalyst were increasesed.

A highly efficient process for transforming methyl mercaptan into hydrocarbons and H2S on solid acid catalysts

2013 ◽  
Vol 134-135 ◽  
pp. 344-348 ◽  
Author(s):  
Edouard Huguet ◽  
Bernard Coq ◽  
Robert Durand ◽  
Catherine Leroi ◽  
Renaud Cadours ◽  
...  
Keyword(s):  
Solid Acid ◽  
Solid Acid Catalysts ◽  
Acid Catalysts ◽  
Methyl Mercaptan ◽  
Efficient Process ◽  
Highly Efficient

Microwave-Assisted Oxidative Coupling of Amines to Imines on Solid Acid Catalysts.

ChemInform ◽  
2007 ◽  
Vol 38 (44) ◽  
Author(s):  
Shainaz M. Landge ◽  
Valentina Atanassova ◽  
Muralidhara Thimmaiah ◽  
Bela Toeroek
Keyword(s):  
Oxidative Coupling ◽  
Solid Acid ◽  
Solid Acid Catalysts ◽  
Acid Catalysts ◽  
Microwave Assisted

Halloysite nanotubes based heterogeneous solid acid catalysts

2020 ◽  
Vol 44 (30) ◽  
pp. 12897-12908
Author(s):  
Aman Mahajan ◽  
Princy Gupta
Keyword(s):  
Acid Catalysis ◽  
Solid Acid ◽  
Catalytic Performance ◽  
Halloysite Nanotubes ◽  
Solid Acids ◽  
Review Article ◽  
Solid Acid Catalysts ◽  
Acid Catalysts ◽  
Heterogeneous Solid ◽  
Excellent Catalytic Performance

Taking into account the excellent catalytic performance of halloysite nanotubes, the main focus of this review article is to unveil the research on halloysite nanotubes for the preparation of solid acids and their applications in acid catalysis.

scholarly journals Optimization of Salix Carbonation Solid Acid Catalysts for One-Step Synthesis by Response Surface Method

2019 ◽  
Vol 9 (8) ◽  
pp. 1518
Author(s):  
Ping Lu ◽  
Kebing Wang ◽  
Juhui Gong
Keyword(s):  
Response Surface ◽  
Response Surface Method ◽  
Solid Acid ◽  
Catalytic Performance ◽  
Solid Acid Catalysts ◽  
Esterification Reaction ◽  
Infrared Analysis ◽  
Acid Catalysts ◽  
Surface Method ◽  
One Step

Salix carboniferous solid acid catalysts were successfully obtained via one-step carbonization and sulfonation of Salix psammophila in the presence of concentrated sulfuric acid, which was then used in the esterification reaction between oleic acid and methanol to prepare the biodiesel. The esterification rate of the catalyst obtained from the reaction indicated the catalytic performance of the catalyst. Afterwards, the recycling performance of the catalyst was optimized and characterized based on Fourier transform infrared spectrometer. The catalyst performance was examined and optimized through the response surface method, and the catalyst was determined and characterized based on scanning electron microscope (SEM), elemental analysis, thermogravimetric analysis, and infrared analysis. The results suggested that the optimal preparation conditions were as follows: reaction temperature of 125 °C, reaction time of 102 min, solid–liquid ratio of 17 g/100 mL, standing time of 30 min, and the highest conversion level of 94.15%.

Microwave-assisted oxidative coupling of amines to imines on solid acid catalysts

2007 ◽  
Vol 48 (29) ◽  
pp. 5161-5164 ◽  
Author(s):  
Shainaz M. Landge ◽  
Valentina Atanassova ◽  
Muralidhara Thimmaiah ◽  
Béla Török
Keyword(s):  
Oxidative Coupling ◽  
Solid Acid ◽  
Solid Acid Catalysts ◽  
Acid Catalysts ◽  
Microwave Assisted
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