Catalysts for the synthesis of acrolein and acrylic acid
A technology of acrylic acid and acrolein, applied in the field of synthesis of acrolein and acrylic acid, can solve the problems of low catalyst activity and selectivity, and achieve the effect of good technical effect
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Embodiment 1
[0063] Add 200ml of deionized water (100°C) to the ingredient tank equipped with a stirring motor, and mix 200 grams of ammonium molybdate ((NH 4 ) 6 Mo 7 o 24 4H 2 O), 36.6 grams of bismuth nitrate (Bi(NO 3 ) 3 ·5H 2 O), 49.5 grams of cobalt nitrate (Co(NO 3 ) 2 ·6H 2 O), 46.2 grams of iron nitrate (Fe(NO 3 ) 3 9H 2 O), 69.3 grams of nickel nitrate (Ni(NO 3 ) 2 ·6H 2 (0), 0.51 g of potassium hydroxide (KOH) was dissolved and vigorously stirred, and the pH of the solution was adjusted to 5 with ammonia water to obtain an aqueous dispersion. Add 451.6g of macroporous Si-Al oxide carrier to the above water dispersion, and transfer it to a rotary evaporator until the water is evaporated to dryness, transfer it to an oven for overnight drying, and finally calcinate at 500°C for 2 hours to obtain the desired catalyst. The main preparation process and catalyst composition of the catalyst are listed in Table 1, and the investigation results of the catalyst are listed i...
Embodiment 2
[0065] Add 100ml of deionized water (100°C) to the ingredient tank equipped with a stirring motor, and mix 46.2 grams of iron nitrate (Fe(NO 3 ) 3 9H 2 O) and 10.1 g of ammonium molybdate ((NH 4 ) 6 Mo 7 o 24 4H 2 O) (molar ratio Mo:Fe=0.5) was dissolved in water, and the pH of the solution was adjusted to 5 with ammonia water to obtain aqueous solution I. Add 451.6g of macroporous Si-Al oxide carrier to the above aqueous solution, and pour it into a rotary evaporator until the aqueous solution I is completely evaporated to dryness, move it into an oven to dry overnight, and then roast it in a muffle furnace at 500°C for 2 hours to obtain a catalyst precursor.
[0066] Add 200ml of deionized water (100°C) to the ingredient tank equipped with a stirring motor, and mix 189.9 grams of ammonium molybdate ((NH 4 ) 6 Mo 7 o 24 4H 2 O), 36.6 grams of bismuth nitrate (Bi(NO 3 ) 3 ·5H 2 O), 49.5 grams of cobalt nitrate (Co(NO 3 ) 2 ·6H 2 O), 69.3 grams of nickel nitra...
Embodiment 3
[0068] Add 100ml of deionized water (100°C) to the ingredient tank equipped with a stirring motor, and mix 46.2 grams of iron nitrate (Fe(NO 3 ) 3 9H 2 O) and 20.2g of ammonium molybdate ((NH 4 ) 6 Mo 7 o 24 4H 2 O) (molar ratio Mo:Fe=1) was dissolved in water, and the pH of the solution was adjusted to 5 with ammonia water to obtain aqueous solution I. Add 451.6g of macroporous Si-Al oxide carrier to the above aqueous solution, and pour it into a rotary evaporator until the aqueous solution I is completely evaporated to dryness, move it into an oven to dry overnight, and then roast it in a muffle furnace at 500°C for 2 hours to obtain a catalyst precursor.
[0069] Add 200ml of deionized water (100°C) to the ingredient tank equipped with a stirring motor, and mix 179.8 grams of ammonium molybdate ((NH 4 ) 6 Mo 7 o 24 4H 2 O), 36.6 grams of bismuth nitrate (Bi(NO 3 ) 3 ·5H 2 O), 49.5 grams of cobalt nitrate (Co(NO 3 ) 2 ·6H 2 O), 69.3 grams of nickel nitrate ...
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