Catalyst for synthesis of cyclic carbonate and production method and application of catalyst for synthesis of cyclic carbonate
A technology of cyclic carbonates and composite catalysts, applied in chemical instruments and methods, physical/chemical process catalysts, organic chemistry, etc., can solve problems such as difficult large-scale industrial production, difficult industrialization, and low selectivity, and achieve simplified separation , easy to obtain raw materials, high activity effect
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Embodiment 1
[0036] In parts by weight, water, ammonium halide, and metal oxide are added into the reactor at 100, 2 and 100 parts and sealed. The ammonium halide is ammonium fluoride, and the metal oxide is 50 parts by weight of Al 2 o 3 and 50 parts by weight BeO. The reactor was then reacted at 80°C for 2 hours. A solid-liquid mixture was obtained. The solid-liquid mixture is taken out and dried to obtain a solid semi-finished product. The obtained solid semi-finished product was calcined at a temperature of 500°C for 2 hours to obtain catalyst 1.
Embodiment 2-6
[0038] Embodiment 2-6 is prepared by the same method as in Example 1, the difference is only in the type of raw material and consumption, reaction temperature, time and calcination temperature and time, and the specific raw material and consumption and specific reaction and calcination conditions are shown in Table 1, Catalysts 2-6 were obtained from Examples 2-6, respectively.
[0039] Table 1 raw materials and consumption and specific reaction and calcination conditions
[0040] Example number 1 2 3 4 5 6 water (parts by weight) 100 200 300 400 500 500 Ammonium halide (parts by weight) ammonium fluoride 2 5 ammonium chloride 10 25 ammonium bromide 20 5 ammonium iodide 2 25 Metal oxides (parts by weight) MgO 50 30 40 al 2 o 3
50 20 ZnO 50 70 20 CaO 50 40 ZrO 2
50 60 BeO 5...
Embodiment 7
[0059] Add urea and dihydric alcohol to the reactor at a molar ratio of 1:2, add catalyst 1, control the reaction temperature to 100°C, the absolute reaction pressure to 60kPa, keep the reaction time for 2 hours, and then centrifuge the obtained product. The dihydric alcohol is ethylene glycol (ie, the dihydric alcohol numbered 1 in Table 4). Then, the product is detected by gas chromatography, and the conventional internal standard method is used for calculation to obtain the yield of the cyclic carbonate.
[0060] Wherein: the content of urea after the reaction is determined according to the national standard GB / T 696-2008 method.
[0061] After the reaction, the content of cyclic carbonate was determined by conventional gas chromatography internal standard method.
[0062]
[0063]
[0064] (Remarks: m—the solution quality after the reaction, M—the total amount of urea used in the reaction raw materials, x—the urea mass content of the solution after the reaction, y—t...
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