In situ functionalized sulfonic copolymer toward recyclable heterogeneous catalyst for efficient Beckmann rearrangement of cyclohexanone oxime

2016 ◽  
Vol 510 ◽  
pp. 125-133 ◽  
Author(s):  
Difan Li ◽  
Dan Mao ◽  
Jing Li ◽  
Yu Zhou ◽  
Jun Wang
Keyword(s):  
Heterogeneous Catalyst ◽  
Beckmann Rearrangement ◽  
Cyclohexanone Oxime ◽  
Recyclable Heterogeneous Catalyst

scholarly journals Organocatalyzed Beckmann Rearrangement of Cyclohexanone Oxime by Trifluoroacetic Anhydride in a Microreactor

2021 ◽  
Author(s):  
Chencan Du ◽  
Yubin Wang ◽  
Jian Deng ◽  
Guangsheng Luo
Keyword(s):  
Experimental Data ◽  
Reaction Rate ◽  
Beckmann Rearrangement ◽  
Trifluoroacetic Anhydride ◽  
Cyclohexanone Oxime ◽  
In Situ Ftir ◽  
Equilibrium Relationship ◽  
Experimental Parameters ◽  
Good Agreement

An efficient method for the Beckmann rearrangement of cyclohexanone oxime (CHO) catalyzed by trifluoroacetic anhydride (TFAA) is proposed in this work. The effects of experimental parameters on the reaction rate are studied, including CHO concentration, TFAA/CHO ratio, temperature, and CPL concentration. The reaction rate shows a linear relationship with TFAA/CHO ratio and reduces with the increasing of CPL concentration. Based on the experimental data and the study of in-situ FTIR, a reaction mechanism is proposed and the equilibrium relationship between CPL and TFAA is established. A rate constant model is developed and is in good agreement with the experimental results. The TFAA/TFA catalytic system allows high conversion and reaction rate compared with other organic acids.

Niobic Acid as a Recyclable Heterogeneous Catalyst for the Solvent-Free Synthesis of Substituted Benzimidazoles

2013 ◽  
Vol 1 (2) ◽  
pp. 136-144 ◽  
Author(s):  
Beatriz Vieira ◽  
Angelita Barcellos ◽  
Ricardo Schumacher ◽  
Eder Lenardao ◽  
Diego Alves
Keyword(s):  
Heterogeneous Catalyst ◽  
Solvent Free ◽  
Niobic Acid ◽  
Recyclable Heterogeneous Catalyst ◽  
Solvent Free Synthesis

In situ and facile synthesis of silver nanoparticles on baby wipes and their applications in catalysis and SERS

RSC Advances ◽  
2016 ◽  
Vol 6 (6) ◽  
pp. 5016-5023 ◽  
Author(s):  
Bharat Baruah
Keyword(s):  
Silver Nanoparticles ◽  
Composite Materials ◽  
Heterogeneous Catalyst ◽  
Facile Synthesis ◽  
Sers Substrates ◽  
Efficient Heterogeneous Catalyst

Silver nanoparticles were immobilized on fibers to create composite materials. The composites are shown to be efficient heterogeneous catalyst with very good recyclability. These composite materials are also proven to be good SERS substrates.

Silica-supported bismuth(III) chloride as a new recyclable heterogeneous catalyst for the Paal–Knorr pyrrole synthesis

2012 ◽  
Vol 708-709 ◽  
pp. 25-30 ◽  
Author(s):  
Kioumars Aghapoor ◽  
Leila Ebadi-Nia ◽  
Farshid Mohsenzadeh ◽  
Mina Mohebi Morad ◽  
Yadollah Balavar ◽  
...  
Keyword(s):  
Heterogeneous Catalyst ◽  
Recyclable Heterogeneous Catalyst

Silicalite-1 deactivation in vapour phase Beckmann rearrangement of cyclohexanone oxime to caprolactam

2010 ◽  
Vol 154 (3-4) ◽  
pp. 264-270 ◽  
Author(s):  
Alberto Cesana ◽  
Stefano Palmery ◽  
Roberto Buzzoni ◽  
Guido Spanò ◽  
Franco Rivetti ◽  
...  
Keyword(s):  
Vapour Phase ◽  
Beckmann Rearrangement ◽  
Cyclohexanone Oxime
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