Task-specific Ionic Liquids as Efficient, Green and Recyclable Reagents and Solvents for Oxidation of Olefins

2005 ◽  
Vol 2005 (6) ◽  
pp. 388-390 ◽  
Author(s):  
Zhiming Wang ◽  
Congna Wang ◽  
Weiliang Bao ◽  
Taokei Ying
Keyword(s):  
Ionic Liquids ◽  
Carboxy Group ◽  
Carbonyl Compounds ◽  
Reaction System ◽  
The Novel ◽  
Oxidation Of Olefins ◽  
Pyridinium Cations

Two kinds of task-specific ionic liquids (Ils) composed of imidazolinium or pyridinium cations with a carboxy group and hydrogensulfate as counterion have been synthesised and their application in oxidation of olefins has been studied. The carbonyl compounds were obtained from the oxidation of chain olefins, and 1,2-cycloalkandiols were obtained from cycloalkenes in the novel oxidation systems which are easily manipulated. The products can be easily isolated from the reaction system and the ILs can readily be recovered and reused.

A two-phase system for the clean and high yield synthesis of furylmethane derivatives over –SO3H functionalized ionic liquids

2017 ◽  
Vol 19 (20) ◽  
pp. 4804-4810 ◽  
Author(s):  
S. H. Shinde ◽  
C. V. Rode
Keyword(s):  
Ionic Liquids ◽  
Reaction System ◽  
High Yield ◽  
Phase System ◽  
Phase Reaction ◽  
Two Phase ◽  
Yield Production ◽  
High Yield Production

A new and effective unique two-phase reaction system for the high yield production of tri(furyl)methane from furfural and furan.

Tandem dihetero-Diels–Alder and Huisgen cycloaddition reactions. Synthesis, crystal structure and hydrolysis of the novel cage phosphoranes

2018 ◽  
Vol 5 (21) ◽  
pp. 3113-3128 ◽  
Author(s):  
Nadezhda R. Khasiyatullina ◽  
Tamara A. Baronova ◽  
Ekaterina V. Mironova ◽  
Robert R. Fayzullin ◽  
Igor A. Litvinov ◽  
...  
Keyword(s):  
Crystal Structure ◽  
Carbonyl Compounds ◽  
Diels Alder ◽  
Cycloaddition Reactions ◽  
The Novel ◽  
Hydrolysis Of

The reaction of 2-(1-phenylvinyloxy)benzo-1,3,2-dioxaphosphole with activated carbonyl compounds leads to the stereoselective formation of cage phosphoranes.

Development of Novel Shale Swelling Inhibitors Using Hydrophobic Ionic Liquids and Gemini Surfactants for Water-Based Drilling Fluids

2021 ◽  
Author(s):  
Rizwan Ahmed Khan ◽  
Mobeen Murtaza ◽  
Hafiz Mudaser Ahmad ◽  
Abdulazeez Abdulraheem ◽  
Muhammad Shahzad Kamal ◽  
...  
Keyword(s):  
Ionic Liquid ◽  
Ionic Liquids ◽  
Gemini Surfactant ◽  
Drilling Fluid ◽  
Control Agent ◽  
Drilling Fluids ◽  
The Novel ◽  
Combined Solution ◽  
Hydrophobic Ionic Liquids ◽  
Inhibition Performance

Abstract In the last decade, hydrophilic Ionic liquids have been emerged as an additive in drilling fluids for clay swelling inhibition. However, the application of hydrophobic Ionic liquids as a clay swelling inhibitor have not been investigated. In this study, the combination of hydrophobic Ionic liquids and Gemini surfactant were studied to evaluate the inhibition performance. The novel combination of hydrophobic ionic liquid (Trihexyltetradecyl phosphonium bis(2,4,4-trimethyl pentyl) phosphinate) and cationic gemini surfactant (GB) was prepared by mixing various concentrations of both chemicals and then preparing water based drilling fluid using other drilling fluid additives such as rheological modifier, filtration control agent, and pH control agent. The wettability of sodium bentonite was determined by contact angle with different concentrations of combined solution. Some other experiments such as linear swelling, capillary suction test (CST) and bentonite swell index were performed to study the inhibition performance of ionic liquid. Different concentrations of novel combined ionic liquid and gemini surfactant were used to prepare the drilling fluids ranging from (0.1 to 0.5 wt.%), and their performances were compared with the base drilling fluid. The wettability results showed that novel drilling fluid having 0.1% Tpb-P - 0.5% GB wt.% concentration has a maximum contact angle indicating the highly hydrophobic surface. The linear swelling was evaluated over the time of 24 hours, and least swelling of bentonite was noticed with 0.1% Tpb-P - 0.5% GB wt.% combined solution compared to linear swelling in deionized water. Furthermore, the results of CST also suggested the improved performance of novel solution at 0.1% Tpb-P - 0.1% GB concentration. The novel combination The novel combination of hydrophobic ionic liquids and gemini surfactant has been used to formulate the drilling fluid for high temperature applications to modify the wettability and hydration properties of clay. The use of novel combined ionic liquid and gemini surfactant improves the borehole stability by adjusting the clay surface and resulted in upgraded wellbore stability.

scholarly journals Ionic Liquids as Bifunctional Cosolvents Enhanced CO2 Conversion Catalysed by NADH-Dependent Formate Dehydrogenase

Catalysts ◽  
2018 ◽  
Vol 8 (8) ◽  
pp. 304 ◽  
Author(s):  
Zhibo Zhang ◽  
Bao-hua Xu ◽  
Jianquan Luo ◽  
Nicolas Solms ◽  
Hongyan He ◽  
...  
Keyword(s):  
Ionic Liquid ◽  
Ionic Liquids ◽  
Dft Calculations ◽  
Formic Acid ◽  
Formate Dehydrogenase ◽  
Enzymatic Reaction ◽  
Reaction System ◽  
Co2 Concentration ◽  
Co2 Conversion ◽  
Low Co2

Efficient CO2 conversion by formate dehydrogenase is limited by the low CO2 concentrations that can be reached in traditional buffers. The use of ionic liquids was proposed as a manner to increase CO2 concentration in the reaction system. It has been found, however, that the required cofactor (NADH) heavily degraded during the enzymatic reaction and that acidity was the main reason. Acidity, indeed, resulted in reduction of the conversion of CO2 into formic acid and contributed to overestimate the amount of formic acid produced when the progression of the reaction was followed by a decrease in NADH absorbance (method N). Stability of NADH and the mechanism of NADH degradation was investigated by UV, NMR and by DFT calculations. It was found that by selecting neutral–basic ionic liquids and by adjusting the concentration of the ionic liquid in the buffer, the concentration of NADH can be maintained in the reaction system with little loss. Conversion of CO2 to methanol in BmimBF4 (67.1%) was more than twice as compared with the conversion attained by the enzymatic reaction in phosphate buffer (24.3%).

Ionic liquids as recyclable solvents for diethylaminosulfur trifluoride (DAST) mediated fluorination of alcohols and carbonyl compounds

2007 ◽  
Vol 48 (30) ◽  
pp. 5305-5307 ◽  
Author(s):  
Saibal Das ◽  
Srivari Chandrasekhar ◽  
Jhillu Singh Yadav ◽  
René Grée
Keyword(s):  
Ionic Liquids ◽  
Carbonyl Compounds
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