Cobalt tin catalyst for preparing alcohol by carboxylic acid hydrogenation
A hydrogenation catalyst and catalyst technology, applied in the direction of physical/chemical process catalyst, metal/metal oxide/metal hydroxide catalyst, hydroxyl compound preparation, etc., can solve the problem of high reaction pressure, low selectivity, harsh operating conditions, etc. problem, to achieve the effect of environmental protection, high selectivity and low cost
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Embodiment 1
[0059] Get 0.8 liter of 1.0mol / L cobalt chloride aqueous solution, add 0.8L of 0.8mol / L tin tetrachloride and 0.3L of 1.0mol / L zirconium oxychloride aqueous solution, then add the Precipitated silica 15g (silicon dioxide (SiO 2 ) content%≥95.0, fineness (325 mesh sieve residue)%≤1.8, specific surface area is 400~600m 2 / g), mix well. Under the condition of sufficient stirring, sodium carbonate aqueous solution (1mlo / L) was slowly added dropwise thereto until the pH value was between 6.8 and 7.2, the above-mentioned precipitate was washed and filtered, and dried overnight to obtain a dry filter cake. Spray 15ml of 0.1wt% silver nitrate solution and 10ml of 1wt% potassium nitrate aqueous solution into the filter cake and then granulate it. The filter cake is roasted and decomposed, and then pelletized to obtain the catalyst CHZ-61.
Embodiment 2
[0061] Add 50g of refined diatomite (produced by Beijing Research Institute of Chemical Industry) into the ball mill, and turn on the ball mill; add 50g of micron-sized metastannic acid powder (produced by Yunnan Tin Industry) into the water, and form a slurry liquid under stirring, keep stirring Add 100g of cobalt nitrate, 10g of copper nitrate, and 5.0g of calcium nitrate, slowly add the above slurry into a diatomite ball mill, mix and roll, extrude, dry and crush to a length of 1~3mm, and roast and decompose for 3 hours to obtain Catalyst CHZ-62.
Embodiment 3
[0063] Take 1 liter of 1mol / L cobalt nitrate aqueous solution, add 2.5 grams of silver nitrate and 10 grams of zinc nitrate to it, after fully dissolving, add concentrated ammonia water (containing NH 3 Mass percentage is about 28%) 0.5L, forming a transparent complex solution. Add tin dioxide powder (average particle size 50nm, more than 90% less than 35nm, self-made by Beijing Research Institute of Chemical Industry) into the above complex solution. Gradually raise the temperature to 85° C., and keep the constant temperature for 2 hours, then add 5.0 g of lanthanum nitrate, and continue to keep the constant temperature for 2 hours. The above slurry was filtered and washed, and dried overnight to obtain a dry filter cake, and 10 ml of diluted phosphoric acid liquid was sprayed on the filter cake. The filter cake was roasted and decomposed, and then pelletized to obtain the catalyst CHZ-63.
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