Method for preparing alcohol by carboxylic acid hydrogenation with cobalt silver catalyst
A catalyst and hydrogen preparation technology, which is applied in chemical instruments and methods, preparation of hydroxyl compounds, preparation of organic compounds, etc., can solve the problems of low selectivity, limited supply of raw materials, and high energy consumption
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Embodiment 1
[0052] Take 0.8 liters of 1.5mol / L cobalt nitrate aqueous solution, add 2.0 grams of silver nitrate and 5.8 grams of copper nitrate to it, after fully dissolving, add concentrated ammonia water (containing NH 3 Mass percentage is about 28%) 0.6L, forming a transparent complex solution. Raise the temperature to 70°C, keep the temperature constant for 2 hours, then slowly add it into 500g of diluted water glass aqueous solution (with a silicon dioxide content of about 10wt%), and then add dropwise 100ml of calcium nitrate solution (calcium nitrate concentration 1.0 mol / L), and continued stirring at constant temperature for 12 hours. The above slurry was filtered, washed, and dried overnight to obtain a dry filter cake. The filter cake was roasted and decomposed, and then pelletized to obtain the catalyst CHZ-51.
Embodiment 2
[0054] Get 1 liter of cobalt nitrate aqueous solution of 0.4mol / L, add 23.6 grams of calcium nitrate tetrahydrate and 4.33 g of lanthanum nitrate therein, add the precipitated silica 40g (silicon dioxide (SiO 2 ) content%≥95.0, fineness (325 mesh sieve residue)%≤1.8, specific surface area is 400~600m 2 / g). After heating up to 40°C, add 10wt% caustic soda solution, monitor the pH value of the solution in real time, stop entering the caustic soda solution when the pH value of the solution is around 7.5, add 10g of diatomaceous earth and stir, then heat up to 70°C for aging After three hours, it was washed free of sodium ions. The slurry was filtered and the filter cake was dried overnight. The catalyst precursor was obtained after decomposing at 450° C. for 5 hours. Take 80g of the above precursor, add about 10ml of silver nitrate aqueous solution (containing 50mg / ml of silver) into it, and then punch it into pellets to obtain the catalyst CHZ-52.
Embodiment 3
[0056] Get 1 liter of cobalt nitrate aqueous solution of 1mol / L, add ammonium molybdate 9.5 grams and lanthanum nitrate 7.5g therein, add 20wt% sodium carbonate solution and carry out precipitation to about pH value 9.0, stir 2 hours under the condition of heating, obtain Precursor I.
[0057] Add 10g of concentrated nitric acid and 6g of calcium nitrate tetrahydrate into 300ml of water, and slowly add to 500g of diluted water glass aqueous solution (with a silicon dioxide content of about 10wt%) to form a white precipitate, and use a high-power stirrer to stir the precipitate to form Slurry, these slurry substances were added to the precursor I, and the aging was continued for 1 hour under stirring conditions. After washing and filtering, and drying overnight to obtain a dry filter cake, 15 ml of silver nitrate solution containing 0.1 wt % was sprayed into the filter cake and then granulated. The particles were calcined and decomposed, and then pelletized to obtain the catal...
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