2015
DOI: 10.15587/1729-4061.2015.37405
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Complex oxide catalysts of acrylic acid obtaining by aldol condensation method

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Cited by 6 publications
(5 citation statements)
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“…As the source of FA we used formalin 37 %, which was prepared from paraform directly before the experiments. The temperature of the process changed in the range of 563÷683 K, the residence time was 12 s because it was found previously that these conditions are optimal for the process of condensation of MP with FA [11][12][13]. The reaction products were analyzed by the gas chromatography method.…”
Section: Methods Of Research Into Activity Of the Created Catalysts Inmentioning
confidence: 99%
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“…As the source of FA we used formalin 37 %, which was prepared from paraform directly before the experiments. The temperature of the process changed in the range of 563÷683 K, the residence time was 12 s because it was found previously that these conditions are optimal for the process of condensation of MP with FA [11][12][13]. The reaction products were analyzed by the gas chromatography method.…”
Section: Methods Of Research Into Activity Of the Created Catalysts Inmentioning
confidence: 99%
“…Compared to the previously studied catalysts for the process of condensation of MP and FA, promoted by individual tungsten oxide and zirconium oxide, the developed catalysts provide for a much higher selectivity of formation of the target products -methyl methacrylate and methacrylic acid. For example, in the presence of the B 2 O 3 -P 2 O 5 -WO 3 /SiO 2 catalyst, the maximum selectivity of formation of acrylates reached 49.1 % and was achieved at a temperature of 653 K [12], while in the presence of the B 2 O 3 -P 2 O 5 -ZrO 2 /SiO 2 catalyst, the selectivity is 65.4 % at a temperature of 623 K [13]. Thus, the designed B 2 O 3 -P 2 O 5 /SiO 2 catalytic system promoted by ZrO 2 :WO 3 =0.15:0.15 allowed us to increase the selectivity of formation of the target products to 96.4 %, which is 31 % higher, and made it possible to carry out the process of condensation of MP and PA with FA at a lower optimum temperature of 593 K than in the process without propionic acid, confirming possibility and feasibility of the PA recycling in the process of condensation of MP and FA.…”
Section: Fig 2 Dependency Of the Total Selectivity Of Formation Of mentioning
confidence: 99%
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“…An important task on the way of the implementation of acrylic acid and methyl acrylate production by condensation reactions is to find efficient catalysts. One of the most effective catalysts of AcA and FA aldol condensation reaction are acid-type catalysts [10][11][12]. In particular, catalysts based on a mixture of boron oxides and phosphorus deposited on silica have been developed.…”
Section: дослIджено процес окиснювальної конденсацIї метанолу з оцтовmentioning
confidence: 99%
“…These catalysts are promoted by molybdenum, vanadium and tungsten oxides, which are effective in the process of aldol condensation. The ability to regulate the acidic properties of the catalysts surface by adding appropriate promoters opens the prospects for the development of efficient catalysts for condensation processes [6,7,[10][11][12]. In recent years, acid-type catalysts have been also used for the production of formaldehyde [13,14].…”
Section: дослIджено процес окиснювальної конденсацIї метанолу з оцтовmentioning
confidence: 99%