Method for synthesizing tetrapion by electric catalytic membrane
A technology for synthesizing sodium tetrafluoropropionate and sodium tetrafluoropropionate, applied in chemical instruments and methods, membrane technology, electrolysis process, etc., can solve problems such as high energy consumption, hindrance of new reactions, separation of reactants and products, etc. Achieve the effect of simple process, wide application prospect and high selectivity
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Embodiment 1
[0028] Prepare 2.0g / L tetrafluoropropanol aqueous solution and place it in the membrane reactor, add the same molar concentration of Na 2 CO 3 as an electrolyte. Under normal temperature and pressure, the working voltage is 3.0V, and the current density is 1mA / cm 2 And the flux is 2.0L / m 2 Under the condition of h, sodium tetrafluoropropionate was synthesized by catalytic oxidation of tetrafluoropropanol with titanium-based electrocatalytic membrane. Qualitative and quantitative detection of the raw liquid and permeated liquid of the reactor was carried out by high-performance liquid chromatography, and the results were as follows: figure 1 shown. Depend on figure 1 The conversion of reactants and the yield of products can be calculated. In this experiment, the conversion rate of tetrafluoropropanol was 93.2%, and the yield of sodium tetrafluoropropionate was 90.5%.
Embodiment 2
[0030] Prepare a 5.0 g / L tetrafluoropropanol aqueous solution and place it in a membrane reactor, and add NaOH with the same molar concentration as the electrolyte. Under normal temperature and pressure, the working voltage is 5.0V, and the current density is 10mA / cm 2 And the flux is 0.5L / m 2 Under the condition of h, sodium tetrafluoropropionate was synthesized by catalytic oxidation of tetrafluoropropanol with titanium-based electrocatalytic membrane. Qualitative and quantitative detection of the raw liquid and permeated liquid of the reactor was carried out by high-performance liquid chromatography, and the conversion rate of the reactant and the yield of the product were obtained. In this experiment, the conversion rate of tetrafluoropropanol was 96.5%, and the yield of sodium tetrafluoropropionate was 22.6%.
Embodiment 3
[0032] Prepare a 1.0g / L tetrafluoropropanol aqueous solution and place it in a membrane reactor, add NaHCO with the same molar concentration 3 as an electrolyte. Under normal temperature and pressure, the working voltage is 1.5V, and the current density is 0.1mA / cm 2 And the flux is 5.0L / m 2Under the condition of h, sodium tetrafluoropropionate was synthesized by catalytic oxidation of tetrafluoropropanol with titanium-based electrocatalytic membrane. Qualitative and quantitative detection of the raw liquid and permeated liquid of the reactor was carried out by high-performance liquid chromatography, and the conversion rate of the reactant and the yield of the product were obtained. In this experiment, the conversion rate of tetrafluoropropanol was 90.3%, and the yield of sodium tetrafluoropropionate was 89.6%.
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