A kind of α, β-unsaturated aldehyde selective hydrogenation conversion catalyst and its preparation method and application
A technology for aldehyde selectivity and hydrogenation conversion, which is applied in metal/metal oxide/metal hydroxide catalysts, physical/chemical process catalysts, chemical instruments and methods, etc. Solve problems such as leaching and catalyst deactivation, and achieve the effects of adjustable pore size, easy synthesis, improved reaction selectivity, and high specific surface area
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Embodiment 1
[0029] A preparation method of α,β-unsaturated aldehyde selective hydroconversion catalyst, comprising the following steps:
[0030] (1) Disperse 0.08g CuO in 100mL absolute ethanol, slowly add 1.50g polyvinylpyrrolidone;
[0031] (2) After the above-mentioned mixture was stirred at room temperature for 12 hours and mixed uniformly, it was added to a mixed solution containing 50 mL of deionized water, 50 mL of absolute ethanol, and 4 mL of ammonia water (28 wt %), and 1.5 g of hexadecyl triacetate was added during the stirring process. Methyl ammonium bromide and 3.0 g of ethyl orthosilicate were stirred at room temperature for 12 hours and mixed well, then transferred to a hydrothermal reactor, reacted at 120 °C for 15 hours, and after natural cooling, the reaction solution was centrifuged and washed, Dry at 80 °C for 15 h to obtain CuO@SiO 2 ;
[0032] (3) CuO@SiO obtained in step (2) 2 Disperse in 30 mL of an aqueous solution containing 0.20 g of cerium nitrate hexahydra...
Embodiment 2
[0036] A preparation method of α,β-unsaturated aldehyde selective hydroconversion catalyst, comprising the following steps:
[0037] (1) Take 0.06g PtO 2 Disperse in 90mL absolute ethanol, slowly add 1.30g polyvinylpyrrolidone;
[0038] (2) After the above mixture was stirred at room temperature for 10 hours and mixed well, it was added to a mixed solution containing 45 mL of deionized water, 45 mL of absolute ethanol, and 3.7 mL of ammonia water (28 wt %), and 1.2 g of hexadecyl was added during the stirring process. Trimethylammonium bromide and 2.8g of ethyl orthosilicate were stirred at room temperature for 10h and mixed uniformly, then transferred to a hydrothermal reactor, reacted at 180°C for 10h, and after natural cooling, the reaction solution was centrifuged and washed , and dried at 120 °C for 10 h to obtain PtO 2 @SiO 2 ;
[0039] (3) PtO obtained in step (2) 2 @SiO 2 Disperse in 20 mL of an aqueous solution containing 0.30 g of indium nitrate, stir at room t...
Embodiment 3
[0043] A preparation method of α,β-unsaturated aldehyde selective hydroconversion catalyst, comprising the following steps:
[0044] (1) get 0.15g NiO and disperse in 110mL absolute ethanol, slowly add 1.70g polyvinylpyrrolidone;
[0045] (2) After the above mixture was stirred at room temperature for 15 hours and mixed well, it was added to a mixed solution containing 55 mL of deionized water, 55 mL of absolute ethanol, and 4.2 mL of ammonia water (28 wt %), and 1.8 g of hexadecyl was added during the stirring process. Trimethylammonium bromide and 3.2g of ethyl orthosilicate were stirred at room temperature for 15h and mixed uniformly, then transferred to a hydrothermal reactor, reacted at 140°C for 14h, and after natural cooling, the reaction solution was centrifuged and washed , and dried at 90 °C for 14 h to obtain NiO@SiO 2 ;
[0046] (3) NiO@SiO obtained in step (2) 2 Disperse in 55mL aqueous solution containing 0.35g ammonium metavanadate, stir at room temperature f...
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