Methyl Acraldehyde, Catalyst Used For Preparing Methyl Acraldehyde And Preparation Method Thereof
A technology of methacrylic acid and methacrolein, used in catalyst activation/preparation, chemical instruments and methods, physical/chemical process catalysts, etc., to achieve high activity and less production
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Embodiment 1
[0068] 3000 g of ammonium molybdate and 55.2 g of cesium nitrate were dissolved while heating and stirring 12000 ml of distilled water to obtain an aqueous solution (A). Separately, 2,782 g of cobalt nitrate, 1,144 g of iron nitrate, and 412 g of nickel nitrate were dissolved in 2,300 ml of distilled water to prepare an aqueous solution (B), and 1,167 g of bismuth nitrate was dissolved in 1,215 ml of distilled water adjusted to be acidic by adding 292 ml of concentrated nitric acid to prepare an aqueous solution (C). . Mix (B) and (C) sequentially in the above aqueous solution (A) while vigorously stirring, finally add 60 g of acetic acid, use a spray dryer to dry the resulting suspension, and calcinate at 460 ° C for 5 hours to obtain the pre- Calcined powder (D). The compositional ratios of the catalyst active component excluding oxygen at this time were Mo=12, Bi=1.7, Fe=2.0, Co=6.75, Ni=1.0, and Cs=0.20 in atomic ratio.
[0069] Thereafter, 5 parts by mass of crystalline...
Embodiment 2
[0072]450 g of ammonium molybdate and 3.8 g of cesium nitrate were dissolved while heating and stirring 2000 ml of distilled water to obtain an aqueous solution (A). Separately, 456 g of cobalt nitrate and 158 g of iron nitrate were dissolved in 500 ml of distilled water to prepare an aqueous solution (B), and 190 g of bismuth nitrate was dissolved in 200 ml of distilled water acidified by adding 48 ml of concentrated nitric acid to prepare an aqueous solution (C). Mix (B) and (C) sequentially in the above aqueous solution (A) while vigorously stirring, finally add 35g of propionic acid, dry the resulting suspension with a spray dryer, and calcinate at 460°C for 5 hours to obtain Pre-calcined powder (D). At this time, the composition ratios of the catalyst active component excluding oxygen were Mo=13, Bi=2.0, Fe=2.0, Co=8.0, and Cs=0.1 in atomic ratio.
[0073] Thereafter, 5 parts by mass of crystalline cellulose was mixed with 100 parts by mass of precalcined powder (D) to o...
Embodiment 3
[0075] 500 g of ammonium molybdate and 10.2 g of cesium nitrate were dissolved while heating and stirring 3000 ml of distilled water in which 40 g of propionic acid was dissolved to obtain an aqueous solution (A). Separately, 485 g of cobalt nitrate, 190 g of iron nitrate, and 72 g of nickel nitrate were dissolved in 395 ml of distilled water to prepare an aqueous solution (B), and 196 g of bismuth nitrate was dissolved in 206 ml of distilled water adjusted to be acidic by adding 50 ml of concentrated nitric acid to prepare an aqueous solution (C). . Mix (B) and (C) sequentially in the above aqueous solution (A) while vigorously stirring, dry the resulting suspension with a spray dryer, and calcinate at 460°C for 5 hours to obtain pre-calcined powder (D) . The compositional ratios of the catalyst active component excluding oxygen at this time were Mo=12, Bi=1.8, Fe=2.0, Co=7.75, Ni=1.5, and Cs=0.30 in atomic ratio.
[0076] Thereafter, 5 parts by mass of crystalline cellulos...
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