Oxidation of white phosphorus by peroxides to produce mono-alkyl phosphate in the alcoholic solution has been studied under non-and catalytic conditions. In this paper,the mechanism of the oxidation process was analyz...Oxidation of white phosphorus by peroxides to produce mono-alkyl phosphate in the alcoholic solution has been studied under non-and catalytic conditions. In this paper,the mechanism of the oxidation process was analyzed. The content of mono-alkyl phosphate in the product is affected by different types of alcoholic solution and peroxide solvent. The result shows the availability of the following order for the activity of the peroxide solvent and alcoholic solutions-tert-butyl hydroperoxide>(di) benzoyl peroxide>hydroperoxide; methanol>n-butyl alcohol>phenol. Under optimized reaction conditions:n(white phosphorus)︰n(tert-butyl hydroperoxide)︰n(methanol)=1︰10︰12,reaction temperature 80 ℃,reaction time 2.5 h,products of 80.0% mono-alkyl phosphonates can be provided when white phosphorus undergoes oxidation by tert-butyl hydroperoxide in the methanol solutions. When Cu(Ⅰ),and Cu(Ⅱ) complexes are used as catalysts,it is possible to significantly enhance the oxidation of white phosphorus with the increase in the reaction rate. The order for activity of catalysts is Cu(acac)2>Cu (CH3COO)2>Cu (C3H7COO)2>CuI>CuCl2. Noticeably,with Cu(acac)2 as catalyst,the selectivity for mono-alkyl phosphonates can reach 95% under adequate reaction conditions.展开更多
In order to clarify the mechanism and the complex formed in the extraction of divalent Mn by alkylphosphonic acid monoester, the solid complex has been prepared by mono (2-ethylhexyl)-2-ethylhexyl phosphate, HEH(EH)P,...In order to clarify the mechanism and the complex formed in the extraction of divalent Mn by alkylphosphonic acid monoester, the solid complex has been prepared by mono (2-ethylhexyl)-2-ethylhexyl phosphate, HEH(EH)P, HA with divalent Mn. The elemental analysis, magnetic susceptibility and thermogravimetry have been determined for the solid complex of HEH(EH)P-Mn(II) and the infrared spectrum has been carried out in comparison to the extractant HEH(EH)P. The extracted compound has also been studied by electronic and electron spin resonance spectroscopy in octane solvent and solid state at room temperature. On the basis of the measurements, it is concluded that the structure of the solid polymeric species MnA_2 is in a tetrahedral arrangement.展开更多
文摘Oxidation of white phosphorus by peroxides to produce mono-alkyl phosphate in the alcoholic solution has been studied under non-and catalytic conditions. In this paper,the mechanism of the oxidation process was analyzed. The content of mono-alkyl phosphate in the product is affected by different types of alcoholic solution and peroxide solvent. The result shows the availability of the following order for the activity of the peroxide solvent and alcoholic solutions-tert-butyl hydroperoxide>(di) benzoyl peroxide>hydroperoxide; methanol>n-butyl alcohol>phenol. Under optimized reaction conditions:n(white phosphorus)︰n(tert-butyl hydroperoxide)︰n(methanol)=1︰10︰12,reaction temperature 80 ℃,reaction time 2.5 h,products of 80.0% mono-alkyl phosphonates can be provided when white phosphorus undergoes oxidation by tert-butyl hydroperoxide in the methanol solutions. When Cu(Ⅰ),and Cu(Ⅱ) complexes are used as catalysts,it is possible to significantly enhance the oxidation of white phosphorus with the increase in the reaction rate. The order for activity of catalysts is Cu(acac)2>Cu (CH3COO)2>Cu (C3H7COO)2>CuI>CuCl2. Noticeably,with Cu(acac)2 as catalyst,the selectivity for mono-alkyl phosphonates can reach 95% under adequate reaction conditions.
文摘In order to clarify the mechanism and the complex formed in the extraction of divalent Mn by alkylphosphonic acid monoester, the solid complex has been prepared by mono (2-ethylhexyl)-2-ethylhexyl phosphate, HEH(EH)P, HA with divalent Mn. The elemental analysis, magnetic susceptibility and thermogravimetry have been determined for the solid complex of HEH(EH)P-Mn(II) and the infrared spectrum has been carried out in comparison to the extractant HEH(EH)P. The extracted compound has also been studied by electronic and electron spin resonance spectroscopy in octane solvent and solid state at room temperature. On the basis of the measurements, it is concluded that the structure of the solid polymeric species MnA_2 is in a tetrahedral arrangement.