97993-78-7Relevant academic research and scientific papers
Degradation of a cationic dye (Rhodamine 6G) using hydrodynamic cavitation coupled with other oxidative agents: Reaction mechanism and pathway
Rajoriya, Sunil,Bargole, Swapnil,Saharan, Virendra Kumar
, p. 183 - 194 (2017)
In the present study, decolorization and mineralization of a cationic dye, Rhodamine 6G (Rh6G), has been carried out using hydrodynamic cavitation (HC). Two cavitating devices such as slit and circular venturi were used to generate cavitation in HC reactor. The process parameters such as initial dye concentration, solution pH, operating inlet pressure, and cavitation number were investigated in detail to evaluate their effects on the decolorization efficiency of Rh6G. Decolorization of Rh6G was marginally higher in the case of slit venturi as compared to circular venturi. The kinetic study showed that decolorization and mineralization of the dye fitted first-order kinetics. The loadings of H2O2 and ozone have been optimized to intensify the decolorization and mineralization efficiency of Rh6G using HC. Nearly 54% decolorization of Rh6G was obtained using a combination of HC and H2O2 at a dye to H2O2 molar ratio of 1:30. The combination of HC with ozone resulted in 100% decolorization in almost 5-10 min of processing time depending upon the initial dye concentration. To quantify the extent of mineralization, total organic carbon (TOC) analysis was also performed using various processes and almost 84% TOC removal was obtained using HC coupled with 3 g/h of ozone. The degradation by-products formed during the complete degradation process were qualitatively identified by liquid chromatography-mass spectrometry (LC-MS) and a detailed degradation pathway has been proposed.
Catalytic degradation of Acid Orange 7 with hydrogen peroxide using CoxOy-N/GAC catalysts in a bicarbonate aqueous solution
Duan, Lian,Chen, Yanling,Zhang, Kaixuan,Luo, Huoyan,Huang, Jianxin,Xu, Aihua
, p. 84303 - 84310 (2015/10/28)
The cobalt-based heterogeneous catalysts CoxOy-N/GAC were prepared by pyrolysis of a cobalt-phenanthroline complex on granular active carbon (GAC) in a nitrogen atmosphere, and tested for the degradation of Acid Orange 7 using hydrogen peroxide as a benign oxidant in a bicarbonate aqueous solution. Characterization by X-ray diffraction, transmission electron microscopy, X-ray photoelectron spectroscopy, and electron spin resonance spectroscopy revealed the formation of a cobalt oxide nanoparticle shell with a metallic Co core on the surface of GAC; and the nitrogen substituted the selected carbon atoms during the pyrolysis process and bonded to cobalt. The catalysts were active for dye decolorization in an aqueous solution containing 10 mM H2O2 and 5 mM NaHCO3 at room temperature. They also presented good stability with nearly no loss of cobalt ions after the reaction, in comparison with the high leaching of Co (0.25 mg L-1) from the CoxOy/GAC catalyst without nitrogen. The production of intermediates, the formation of reactive radicals and the effect of HCO3- were also investigated to further explore the efficiency of the catalyst. This study can provide a promising way for the activation of the green oxidant H2O2 in a bicarbonate aqueous solution by heterogeneous cobalt catalysts for environmental remediation.
METHOD OF PURIFYING REDUCED COENZYME Q
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Page 33, (2008/06/13)
The object of the present invention is to provide a method of purifying reduced coenzyme Q10 to produce a high-quality product which is useful as an ingredient in foods, functional nutritive foods, specific health foods, nutritional supplements, nutrients, animal drugs, drinks, feeds, cosmetics, medicines, remedies, preventive drugs, etc., by a efficient manner suitable for an industrial scale production. The present invention relates to a method of purifying reduced coenzyme Q10 which comprises washing crystals and/or oil of reduced coenzyme Q10 with a water-soluble organic solvent or a mixed solvent composed of a water-soluble organic solvent and water to thereby remove water-soluble impurities, especially a reducing agent or impurities derived from a reducing agent, from the crystals and/or oil of reduced coenzyme Q10. The present invention makes it possible to conveniently and efficiently purify reduced coenzyme Q1o in a manner excellent in operationality, and to obtain a high-quality reduced coenzyme Q10.
Aminoalkenylbenzoyl-benzofuran or benzothiophene, method for preparing same and compositions containing same
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, (2008/06/13)
The invention relates to novel (aminoalkenyl-benzoyl) benzofuran or benzothiophene derivatives of general formula: The compounds are of use as medicaments, in particular in the treatment of pathological syndromes of the cardiovascular system.
N-(-3-aminopropyl)-N-phenyl-5,6,7,8-tetrahydro-naphthalene-2-carboxamide derivatives, their preparation and their therapeutic use
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, (2008/06/13)
Compounds of the formula: STR1 in which R1 represents a hydrogen or halogen atom or a methyl or C1 -C4 alkoxy group, R'1 represents a hydrogen or halogen atom, R"1 represents a hydrogen atom or a meth
Benzoxazine derivatives and their application in therapy
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, (2008/06/13)
Compounds of the formula STR1 in which Y represents hydrogen, fluorine, chlorine, methyl or methoxy, R1 represents phenyl substituted by fluorine, methyl, methoxy, trifluoromethyl or phenyl, or R1 represents 2-thienyl, R2 represents methyl, and R3 represents (C1 -C4)-alkyl, or phenyl-(C1 -C2)-alkyl optionally substituted on the ring by 2 to 3 methoxy groups, or 2-(2-pyridyl)ethyl, or R2 and R3 form, with the adjacent nitrogen, 4-phenyl(1-piperidyl), 4-phenylmethyl(1-piperidyl), 1,2,3,4-tetrahydro-2-isoquinolyl, 6-methoxy-1,2,3,4-tetrahydro-2-isoquinolyl, 5,8-dimethoxy-1,2,3,4-tetrahydro-2-isoquinolyl, 6,7-dimethoxy 1,2,3,4-tetrahydro-2-isoquinolyl, 2,3,4,5-tetrahydro-1H-3-benzazepin-3-yl, or 7,8-dimethoxy-2,3,4,5-tetrahydro-1H-3-benzazepin-3-yl, and X represents carbonyl or sulphonyl, and their salts are useful as neuroprotective and antiiischaemic agents.
Substituted piperidine compounds and their use
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, (2008/06/13)
Novel piperidine compounds having the formula I STR1 wherein R3 is 3,4-methylenedioxyphenyl, phenyl, naphthyl, which are optionally substituted with one or two halogen, amino, C1-6 -alkyl mono-or disubstituted amino group, C1-6
Arylalkylheterocyclic amines,N-substituted by aryloxyalkyl group in a method for allergy treatment
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, (2008/06/13)
A method of inhibiting Type 1 allergic responses in a living animal body with substituted heterocyclic amines is disclosed wherein the active agents are expressed generally by the formula which includes certain known and certain known compounds: STR1 wherein P is zero, one or two; m is one to six inclusive; A is selected from hydrogen, hydroxy or cyano; d is zero or one; Q is --CH--, CH2 -- or STR2 n is zero or one and when Q is --CH-- and n is one, a double bond is formed with one of the adjacent carbons but not both at the same time, and when n and d are zero at the same time, a double bond is formed between the α carbon and a carbon of the central heterocyclic amine ring; Ar, D and R are selected from phenyl, substituted phenyl, pyridinyl, thienyl, furanyl or naphthyl and in addition, R may have the values benzyl, substituted benzyl, cycloalkyl or loweralkyl and D may additionally have the values: 2H-1-benzopyran-2-one,4-oxo-4H-1-benzopyran-2-carboxylic acid loweralkyl ester, 2,3-dihydro-4H-1-benzopyran-4-one, 1,4-benzodioxanloweralkyl-2-yl or 1,1'-biphenyl-4-yl and the pharmaceutically acceptable salts thereof.
Reactions with Potassium Superoxide 2. Cleavage of N-Acyl-glycine Derivatives
Lissel, Manfred,Gau, Achim
, p. 367 - 370 (2007/10/02)
N-Acyl-glycine derivatives are cleaved by the action of potassium superoxide in ether or pyridine solution to give the corresponding carboxamides. - Keywords: Superoxide, Potassium Superoxide, N-Acyl-glycine Derivatives
Mechanism of the Silver-catalysed Heterogeneous Epoxidation of Ethylene
Grant, Robert B.,Lambert, Richard M.
, p. 662 - 663 (2007/10/02)
Chemisorbed atomic oxygen is the crucial surface species which selectively oxidises ethylene to ethylene oxide; adsorbed dioxygen plays no direct role in this reaction.
