An ionic liquid immobilized copper complex for catalytic epoxidation

RSC Advances ◽  
2015 ◽  
Vol 5 (81) ◽  
pp. 65870-65873 ◽  
Author(s):  
R. Dileep ◽  
B. J. Rudresha
Keyword(s):  
Hydrogen Peroxide ◽  
Ionic Liquid ◽  
Liquid Medium ◽  
Catalytic System ◽  
Copper Complex ◽  
Liquid Mixture ◽  
Catalytic Epoxidation ◽  
Epoxidation Of Olefins ◽  
Ionic Liquid Medium

A catalytic system consisting of copper complex and hydrogen peroxide in Emim ionic liquid medium was effective in the epoxidation of olefins and terpenes. The catalyst and the ionic liquid mixture was recycled and reused consistently.

Magnetic Organic-Inorganic Hybrid Nano System Anchored Platinum Nanoparticles for Carbon Sequestration Reaction

2019 ◽  
Vol 17 (1) ◽  
pp. 73-83
Author(s):  
Praveenkumar Ramprakash Upadhyay ◽  
Prashant Gautam ◽  
Vivek Srivastava
Keyword(s):  
High Pressure ◽  
Ionic Liquid ◽  
Liquid Medium ◽  
Catalytic System ◽  
Pt Nanoparticles ◽  
Co2 Absorption ◽  
Reaction Condition ◽  
High Pressure Reaction ◽  
The Stability ◽  
Ionic Liquid Medium

new Pt metal based nano-catalytic system was developed using organic-inorganic magnetic framework followed by the user-friendly protocol in good yield. XRD, FTIR, TEM, BET, ICP-OES and solid-state NMR techniques were used to characterize our developed catalytic system. The wellcharacterized ionic liquid bridged-silica supported magnetic Pt nanoparticles were utilized for the selective hydrogenation of carbon dioxide under high-pressure reaction condition (with and without ionic liquid medium). Most promising results were obtained while using the catalytic system (Pt-MagNP@ILSiO2) in 1,3-di (N, N-dimethylaminoethyl)-2-methylimidazolium nonafluorobutanesulfonate ([DAMI] [CF3CF2CF2CF2SO3]) task-specific ionic liquid medium. This TSIL not only provided a high degree of CO2 absorption during the reaction but also enhances the selectivity and the recyclability of the catalytic system up to 8 runs. No sign of Pt metal leaching was recorded during the recyclability test which confirmed the stability of this catalytic system under high-pressure reaction condition.

Epoxidation of Olefins Catalyzed by Polyoxomolybdates Formed in-situ in Ionic Liquids

2013 ◽  
Vol 68 (10) ◽  
pp. 1138-1142 ◽  
Author(s):  
Lilian R. Graser ◽  
Sophie Jürgens ◽  
Michael E. Wilhelm ◽  
Mirza Cokoja ◽  
Wolfgang A. Herrmann ◽  
...  
Keyword(s):  
Aqueous Solution ◽  
Hydrogen Peroxide ◽  
Ionic Liquid ◽  
Catalyst Concentration ◽  
Sodium Molybdate ◽  
Significant Loss ◽  
Catalytic Epoxidation ◽  
Epoxidation Reaction ◽  
Epoxidation Of Olefins

Polyoxomolybdates were generated in situ by treating a carboxylic acid-functionalized ionic liquid with an aqueous solution of sodium molybdate. This reaction mixture was applied in the catalytic epoxidation of olefins using hydrogen peroxide as oxidant. The influence of acid and catalyst concentration as well as of the reaction temperature was investigated. The system showed a good performance for the epoxidation reaction and can be reused several times without a significant loss of activity. We present an easy, cheap and environmentally friendly catalytic system for the epoxidation of cis-cyclooctene.

Synthesis of highly dispersed potassium hexacobaltinitrite in the ionic liquid medium

2013 ◽  
Vol 58 (4) ◽  
pp. 435-439
Author(s):  
V. I. Chistov ◽  
E. V. Esipova ◽  
I. S. Filimonov ◽  
E. A. Chendakova ◽  
A. G. Vendilo
Keyword(s):  
Ionic Liquid ◽  
Liquid Medium ◽  
Highly Dispersed ◽  
Ionic Liquid Medium

Transition-metal-free borylation of propargylic alcohols: structurally variable synthesis in ionic liquid medium

2019 ◽  
Vol 6 (11) ◽  
pp. 1895-1899 ◽  
Author(s):  
Sangepu Bhavanarushi ◽  
Yin Xu ◽  
Imran Khan ◽  
Zhibin Luo ◽  
Bin Liu ◽  
...  
Keyword(s):  
Ionic Liquid ◽  
Ionic Liquids ◽  
Transition Metal ◽  
Liquid Medium ◽  
Propargylic Alcohols ◽  
Metal Free ◽  
Ionic Liquid Medium

Transition-metal-free borylation of unactivated propargylic alcohols in basic ionic liquids allowed the construction of various highly functionalized vinylboronates.

Influencing Factors of Chromium Ion Stability in Microbe Culture Media

2012 ◽  
Vol 610-613 ◽  
pp. 215-219
Author(s):  
Yun Xiao He ◽  
Xiao Ming Chen
Keyword(s):  
Ionic Liquid ◽  
Liquid Medium ◽  
Culture Media ◽  
Fluid Medium ◽  
Chromium Ion ◽  
Medium Components ◽  
Salt Ions ◽  
Ion Stability ◽  
The Stability ◽  
Ionic Liquid Medium

The stability factors for Cr6+ and Cr3+ in microbiological media, including temperature, preservation conditions and medium components were studied in this research project, through potassium permanganate oxidation and DPC (Diphenylcarbazide) spectrophotometry. It shows that the protein component mainly influences Cr6+ content changes at pre- and post- heat sterilization to the chromium ionic liquid medium, other than being impacted basically by inorganic salt ions. It also indicates that the method can be introduced into experiment researches for microbe dechromisation i.e. Chromium ion aqueous solution and fluid medium are sterilized separately, and then are made into the chrome ions liquid as per a certain concentration. The concentration of hexavalent chromium ions is affected by preservation time and temperature also. For this reason, chromium ionic liquid medium is kept at low temperature, and as quickly as possible for the test.

Trapping of a Highly Reactive Oxoiron(IV) Complex in the Catalytic Epoxidation of Olefins by Hydrogen Peroxide

2019 ◽  
Vol 131 (12) ◽  
pp. 4052-4056 ◽  
Author(s):  
Xenia Engelmann ◽  
Deesha D. Malik ◽  
Teresa Corona ◽  
Katrin Warm ◽  
Erik R. Farquhar ◽  
...  
Keyword(s):  
Hydrogen Peroxide ◽  
Catalytic Epoxidation ◽  
Epoxidation Of Olefins
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