Phenol oxidation mineralization

In order to study the Fe-assisted FC mineralization of phenol, experiments were typically performed for the FC oxidation of phenol to determine the optimum pH at which the rate of oxidation was the highest possible in the reactor setup employed for this study. Then a series of tests were carried out to identify the aromatic and carboxylic intermediates of phenol oxidation at the optimum pH value. Subsequently, more tests with those aromatics identified as phenol oxidation intermediates were performed to unveil the intermediates produced during their corresponding FC oxidations and also to compare with the Fe-assisted FC reactions. 

Besides carboxylic acids, phenolic compounds can also bond to variable-chaige minerals by direct coordination between the phenolic oxygen and the surface. This means that pesticides such as dinoseb (see Table 10.2) may be retained to some degree by allophane and oxide minerals of soils. 

METHYL-o-TOLUIDINE (95-68-1) Combustible liquid (flash point 205°F/96°C). Violent reaction with strong oxidizers, strong acids, nitrosyl perchlorate. Mixtures with hypochlorites form sensitive explosive chloroamines. Incompatible with aldehydes, non oxidizing mineral acids, cellulose nitrate (of high surface area), cresols, isocyanates, nitrates, nitric acid, organic anhydrides, phenols, sulfuric acid. 

PMMA is not affected by most inorganic solutions, mineral oils, animal oils, low concentrations of alcohols paraffins, olefins, amines, alkyl monohahdes and ahphatic hydrocarbons and higher esters, ie, >10 carbon atoms. However, PMMA is attacked by lower esters, eg, ethyl acetate, isopropyl acetate aromatic hydrocarbons, eg, benzene, toluene, xylene phenols, eg, cresol, carboHc acid aryl hahdes, eg, chlorobenzene, bromobenzene ahphatic acids, eg, butyric acid, acetic acid alkyl polyhaHdes, eg, ethylene dichloride, methylene chloride high concentrations of alcohols, eg, methanol, ethanol 2-propanol and high concentrations of alkahes and oxidizing agents. 

The corrosion behavior of tantalum is weU-documented (46). Technically, the excellent corrosion resistance of the metal reflects the chemical properties of the thermal oxide always present on the surface of the metal. This very adherent oxide layer makes tantalum one of the most corrosion-resistant metals to many chemicals at temperatures below 150°C. Tantalum is not attacked by most mineral acids, including aqua regia, perchloric acid, nitric acid, and concentrated sulfuric acid below 175°C. Tantalum is inert to most organic compounds organic acids, alcohols, ketones, esters, and phenols do not attack tantalum. 

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