Catalyst for preparing ethanol through acetic acid hydrogenation, preparation method thereof, and method for preparing ethanol through acetic acid hydrogenation
A catalyst and a technology for producing ethanol, which are applied in chemical instruments and methods, preparation of hydroxyl compounds, preparation of organic compounds, etc., can solve the problem of decreased catalyst stability, low acetic acid conversion rate, catalyst acetic acid conversion rate and ethanol selectivity. 95% and other problems, to achieve the effect of low production cost and simple production and preparation method
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Embodiment 1
[0059] Step (1): Add 8.0g of ammonium molybdate and 6.2g of ammonium dihydrogen phosphate into 200mL of deionized water, heat and dissolve at 90°C under constant stirring, and obtain a clear and transparent Mo-P mixed solution;
[0060] Step (2): Weigh 70g Al 2 o 3 and 10g of MgO, mixed in a ball mill, ground for 2 hours, and then fired at 1000°C for 8 hours to obtain magnesium aluminum spinel.
[0061] Step (3): 100g of high-purity SiO after roasting at 500°C 2 Mix the powder, 6g of safflower powder and 10g of magnesia-aluminum spinel in step (2) evenly, pour it into the kneader, slowly add the mixed liquid in step (1) while kneading, knead and extrude into 3mm*5mm After the rod-shaped shape, put it into a 120°C drying oven for 6 hours, and finally bake it in a 600°C muffle furnace for 4 hours to obtain the acetic acid hydrogenation catalyst carrier, and its specific surface area measured by BET is 181m 2 / g.
[0062] Step (4): Add the catalyst carrier obtained in step (3...
Embodiment 2
[0065] Step (1): Add 8.0g of ammonium molybdate and 6.2g of ammonium dihydrogen phosphate into 200mL of deionized water, heat and dissolve at 90°C under constant stirring, and obtain a clear and transparent Mo-P mixed solution;
[0066] Step (2): take by weighing 12.82g Mg(NO 3 ) 2 ·6H 2 O, 37.51g Al(NO 3 ) 3 9H 2 O was dissolved in 100mL deionized water and stirred to form a solution. Under vigorous stirring, ammonia water with a concentration of 25% by mass was slowly dropped in, and after white flocculent precipitation appeared, the pH value of the slurry was controlled at about 10. The precipitate was filtered and washed twice with deionized water, then dried in a drying oven at 120°C for 12 hours, and finally calcined in a muffle furnace at 700°C for 5 hours to obtain magnesium aluminum spinel.
[0067] Step (3): 10 g of magnesium-aluminum spinel obtained in step (2) is directly mixed with 100 g of high-purity alumina powder and 6 g of turnip powder, poured into a k...
Embodiment 3
[0071] Step (1): Add 8.0g of ammonium molybdate and 6.2g of ammonium dihydrogen phosphate into 200mL of deionized water, heat and dissolve at 90°C under constant stirring, and obtain a clear and transparent Mo-P mixed solution;
[0072] Step (2): 33.76g Al(NO 3 ) 3 9H 2 O with 12.82g Mg(NO 3 )2·6H 2 O was dissolved in a mixed solution of 80ml of deionized water and 40ml of ethanol, and was stirred to form a solution; 25.2g of urea and 2.02g of sodium lauryl sulfate were added to the above solution, and stirred for 30min; the resulting solution was transferred to a volume of 200ml In a polytetrafluoroethylene-lined stainless steel autoclave, the reaction was carried out at a constant temperature of 180 ° C for 8 h, and then naturally cooled to room temperature. After the product was filtered, it was washed three times with deionized water and absolute ethanol, respectively. Then dry at 120°C, and then bake at 700°C for 4 hours to obtain magnesium-aluminum spinel;
[0073]...
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