Conditions for occurrence of long-chain oxidation reaction of organic compounds by persulfate in an aqueous medium

1990 ◽  
Vol 26 (3) ◽  
pp. 337-341 ◽  
Author(s):  
Ar. A. Berlin ◽  
V. N. Kislenko ◽  
Yu. G. Medvedevskikh
Keyword(s):  
Aqueous Medium ◽  
Organic Compounds ◽  
Oxidation Reaction ◽  
Chain Oxidation ◽  
Long Chain

Fenton degradation of Cartap hydrochloride: identification of the main intermediates and the degradation pathway

2015 ◽  
Vol 72 (7) ◽  
pp. 1198-1205 ◽  
Author(s):  
Kaixun Tian ◽  
Cuixiang Ming ◽  
Youzhi Dai ◽  
Kouassi Marius Honore Ake
Keyword(s):  
Aqueous Medium ◽  
Flue Gas ◽  
High Performance ◽  
Oxygen Demand ◽  
Nitrogen Monoxide ◽  
Degradation Pathway ◽  
Gas Chromatograph ◽  
Gas Analyzer ◽  
Fenton System ◽  
Long Chain

The advanced oxidation of Cartap hydrochloride (Cartap) promoted by the Fenton system in an aqueous medium was investigated. Based on total organic carbon, chemical oxygen demand and high-performance liquid chromatography, the oxidation of Cartap is quite efficient by the Fenton system. Its long chain is easily destroyed, but the reaction does not proceed to complete mineralization. Ion chromatography detection indicated the formation of acetic acid, propionic acid, formic acid, nitrous acid and sulfuric acid in the reaction mixtures. Further evidence of nitrogen monoxide and sulfur dioxide formation was obtained by using a flue gas analyzer. Monitoring by gas chromatograph-mass spectrometer demonstrated the formation of oxalic acid, ethanol, carbon dioxide, and l-alanine ethylamide. Based on these experimental results, plausible degradation pathways for Cartap mineralization in an aqueous medium by the Fenton system are proposed.

Water Oxidation Reaction Catalyzed by Co3O4 Treated with Organic Compounds

2018 ◽  
Vol 57 (33) ◽  
pp. 11259-11264 ◽  
Author(s):  
Paulo Vitor O. Cordeiro ◽  
Nakédia M. F. Carvalho
Keyword(s):  
Organic Compounds ◽  
Water Oxidation ◽  
Oxidation Reaction

Ozonolysis of tetramethoxyethene

1988 ◽  
Vol 66 (9) ◽  
pp. 2234-2243 ◽  
Author(s):  
Karl R. Kopecky ◽  
José Molina ◽  
Rodrigo Rico
Keyword(s):  
Singlet Oxygen ◽  
Oxidation Reaction ◽  
Transfer Reaction ◽  
Dimethyl Carbonate ◽  
Electron Transfer Reaction ◽  
Initial Reaction ◽  
Radical Ions ◽  
Radical Chain ◽  
Chain Oxidation ◽  
Radical Chain Oxidation

Ozonolysis of tetramethoxyethene 1 produces 20–40% of dimethyl carbonate 3, 35–60% of methyl trimethoxyacetate 7, and 20–35% of the dioxetane 8 of 1. Yields vary with initial concentration of 1, temperature, and solvent. Singlet oxygen is produced, which reacts with 1 to form 8 and can be trapped with 2,5-dimethylfuran. No evidence for the formation of the molozonide of 1 was obtained. Up to 2.5 moles of 1 are consumed per mole of ozone. Ozonolysis of a mixture of 1 and 2,3-dimethyl-2-butene 12 gave the epoxide of 12 and three times the expected amount of the allylic hydroperoxide of 12. A competing radical chain oxidation reaction is proposed to account for these products and the stoichiometry of the ozonolysis. The initial reaction in the ozonolysis of 1 is proposed to be an electron transfer reaction that is calculated to be exothermic by > 35 kcal/mol. The resulting radical ions initiate the radical chain oxidation and combine to form the oxygenated epoxide 9 of 1. Loss of singlet oxygen from 9 forms the epoxide 10, which rearranges to 7. At −95 °C the zwitterion from 10 is trapped by CD3OD to produce a mixture of 7 with one α OCD3 group and pentamethoxyethanol with one β OCD3 group from which a CH3OD group is lost at ~ −10 °C to form more deuterated ester.

New chiral anisotropic reagents, NMR tools to elucidate the absolute configurations of long-chain organic compounds

1994 ◽  
Vol 35 (25) ◽  
pp. 4397-4400 ◽  
Author(s):  
Takenori Kusumi ◽  
Haruko Takahashi ◽  
Ping Xu ◽  
Toshiro Fukushima ◽  
Yoshinori Asakawa ◽  
...  
Keyword(s):  
Organic Compounds ◽  
The Absolute ◽  
Long Chain

Energetics of cellulose and cyclodextrin glycosidic bond cleavage

2017 ◽  
Vol 2 (2) ◽  
pp. 201-214 ◽  
Author(s):  
Cheng Zhu ◽  
Christoph Krumm ◽  
Gregory G. Facas ◽  
Matthew Neurock ◽  
Paul J. Dauenhauer
Keyword(s):  
High Temperature ◽  
Volatile Organic Compounds ◽  
Organic Compounds ◽  
Bond Cleavage ◽  
Thermochemical Conversion ◽  
Lignocellulosic Materials ◽  
Renewable Chemicals ◽  
Volatile Organic ◽  
Glycosidic Bond Cleavage ◽  
Long Chain

Thermochemical conversion of lignocellulosic materials for production of biofuels and renewable chemicals utilizes high temperature to thermally decompose long-chain cellulose to volatile organic compounds.

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