- Preparation method of tri-iso-octyl phosphate
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The invention provides a preparation method of tri-iso-octyl phosphate, and in particular relates to a method of utilizing phosphorus oxychloride and isooctyl alcohol under negative pressure and simultaneously carrying out ultrasonic-assisted chlorine hydride gas removal to prepare tri-iso-octyl phosphate. The invention utilizes the method of ultrasonic-assisted chlorine hydride gas removal to prepare tri-iso-octyl phosphate, under the action of ultrasonic wave, violent impact occur between liquid particles, thus being conducive to accelerated reaction. Also, after ultrasonic wave acts on the reaction feed liquid, a lot of small bubbles can be produced, tensile stress can appear locally in the liquid so as to form negative pressure, the pressure reduction brings about supersaturation of gas originally dissolved in the feed liquid, so that the gas escapes from the liquid to form bubbles, and then by means of vacuum pumping and under an ultrasonic assisted condition, the escaped hydrogen chloride gas can break away directly, thus greatly reducing the generation of the byproduct iso-octane chloride. The method not only improves the reaction yield, but also reduces environmental pollution, and saves the production cost.
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Paragraph 0012; 0016; 0017; 0018; 0019; 0020; 0021-0061
(2017/02/24)
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- Solvent-free microwave synthesis of trialkylphosphates
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Trialkylphosphates are synthesized from alcohols by reaction with reactive phosphorus oxychloride under microwave irradiations and classical heating. Effects of these irradiations on the nature of the products and on the yield are studied. The compounds were characterized by their spectroscopic data and elemental analysis. The obtained results show that the products of these reactions are essentially trialkylphosphates and alkylphosphoric acids. They always show as the nature of the formed products and the yields in trialkylphosphates are comparable to those obtained in the classical conditions of heating. The speed of the reaction was increased by a factor from 40 to 120.
- Meddour-Boukhobza, Laaldja,Elias, Abdelhamid,Didi, Mohamed A.
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p. 255 - 259
(2014/06/23)
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- ETUDE PAR SPECTROMETRIE RMN DU MECANISME DE L'ACTION DU 2-ETHYLHEXANOL SUR LE PENTOXYDE DE PHOSPHORE
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The reaction of phosphorus pentaxide with 2-ethylhexanol has been studied in the absence of solvent.The analysis of raw and purified reaction products has been carried out using 31P NMR.This study allowed us to describe the different reaction steps and the evolution of the reagents, intermediates, and reaction products with time.The examination of the time and temperature dependence has shown the importance of kinetic effects and has given insight into the mechanism of the action of the alcohol on the P-O bonds of the phosphoric anhydride.The results suggest that only the progresive cleaving of these bonds leads to the products obtained under these conditions. Key words: Di(2-ethylhexyl)phosphate; phosphorus pentoxide; 2-ethylhexanol; synthesis; mechanism; NMR.
- Elias, A.,Azzouz, A.,Rodehueser, L.
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