Sequential [3+2] Cycloaddition/Air Oxidation Reactions: Triazoloyl Ion Assisted Oxidative Cleavage of Alkynes

2013 ◽  
Vol 2013 (19) ◽  
pp. 3974-3977 ◽  
Author(s):  
Thanasekaran Ponpandian ◽  
Shanmugam Muthusubramanian ◽  
Sridharan Rajagopal
ChemInform ◽  
2013 ◽  
Vol 44 (48) ◽  
pp. no-no
Author(s):  
Thanasekaran Ponpandian ◽  
Shanmugam Muthusubramanian ◽  
Sridharan Rajagopal

2009 ◽  
Vol 59 (12) ◽  
pp. 2509-2518 ◽  
Author(s):  
E. Chatzisymeon ◽  
E. Diamadopoulos ◽  
D. Mantzavinos

The non-catalytic wet air oxidation (WAO) of olive mill wastewaters was investigated. The effect of operating conditions, such as initial organic loading (1,000 and 4,500 mg/L COD), reaction temperature (140 and 180°C), treatment time (1 and 4 h), initial pH (4.8 and 7) and the use of 500 mg/L H2O2 as an additional oxidant, on treatment efficiency was assessed implementing a factorial experimental design. Of the five parameters tested, the first two had a considerable effect on COD removal, while treatment time was of no significance implying that all oxidation reactions occur during the first hour of treatment. Although the level of mineralization was generally moderate, this was accompanied by nearly complete total phenols and color removal. The analysis was repeated at more intense conditions, i.e. initial COD up to 8,000 mg/L and reaction temperature up to 200°C; at this level, none of the studied effects were important. However, at optimal experimental conditions (i.e. 180°C, 1 h treatment and initial COD of 8,100 mg/L) WAO yielded 34, 94 and 74% removal of COD, total phenols and color respectively. Moreover, ecotoxicity to V. fischeri was slightly reduced after 2 h of treatment at the above conditions.


1995 ◽  
Vol 99 (15) ◽  
pp. 5633-5638 ◽  
Author(s):  
Joerg Schwitzgebel ◽  
J. G. Ekerdt ◽  
H. Gerischer ◽  
Adam Heller

2015 ◽  
Vol 39 (4) ◽  
pp. 2425-2428 ◽  
Author(s):  
Yonghun Shin ◽  
Jintaek Park ◽  
Daesun Hyun ◽  
Junghee Yang ◽  
Hyoyoung Lee

Facile synthesis of graphene quantum dots using an acid-free oxone oxidant and graphene oxide was successfully developed by sono- and photo-oxidation reactions.


2019 ◽  
Vol 35 (5) ◽  
pp. 591-625 ◽  
Author(s):  
Nurul F. Himma ◽  
Anita K. Wardani ◽  
Nicholaus Prasetya ◽  
Putu T.P. Aryanti ◽  
I Gede Wenten

AbstractCompared with current conventional technologies, oxygen/nitrogen (O2/N2) separation using membrane offers numerous advantages, especially in terms of energy consumption, footprint, and capital cost. However, low product purity still becomes the major challenge for commercialization of membrane-based technologies. Therefore, numerous studies on membrane development have been conducted to improve both membrane properties and separation performance. Various materials have been developed to obtain membranes with high O2permeability and high O2/N2selectivity, including polymer, inorganic, and polymer-inorganic composite materials. The results showed that most of the polymer membranes are suitable for production of low to moderate purity O2and for production of high-purity N2. Meanwhile, perovskite membrane can be used to produce a high-purity oxygen. Furthermore, the developments of O2/N2separation using membrane broaden the applications of oxygen enrichment for oxy-combustion, gasification, desulfurization, and intensification of air oxidation reactions, while nitrogen enrichment is also important for manufacturing pressure-sensitive adhesive and storing and handling free-radical polymerization monomers.


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