Anthraquinone hydrogenation catalyst and preparation method thereof
A hydrogenation catalyst, catalyst technology, applied in chemical instruments and methods, metal/metal oxide/metal hydroxide catalysts, physical/chemical process catalysts, etc., can solve difficult regeneration, working fluid degradation, Raney nickel catalysts Air spontaneous combustion and other problems, to achieve the effect of high hydrogenation efficiency and low degradation of anthraquinone
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preparation example Construction
[0016] Provide a kind of specific preparation method of catalyst of the present invention below, but not limited to this method, concrete steps are:
[0017] (1) Preparation of nano magnesium oxide;
[0018] (2), the nano-magnesia obtained in step (1) is loaded with rare earth elements, and dried and roasted to obtain rare earth-modified nano-magnesia;
[0019] (3), adding a pore-forming agent, silica sol and water to the rare earth-modified nano-magnesia obtained in step (2), kneading and molding, drying and roasting to obtain a catalyst carrier;
[0020] (4), loading active metal components on the catalyst carrier obtained in step (3), drying and roasting to obtain a catalyst precursor;
[0021] (5) Treating the catalyst precursor prepared in step (4) with a boron-containing compound to obtain a catalyst.
[0022] The nano-magnesium oxide described in step (1) can be prepared by conventional methods, such as: dissolving the magnesium-containing compound in a solvent, addin...
Embodiment 1
[0030] Example 1 (if there is no special note below, the percentages are percentages by weight)
[0031] The preparation steps of a kind of catalyst of the present invention are as follows:
[0032] (1) Dissolve 5000 grams of magnesium nitrate in 50 liters of water, add 4000 grams of ethylene glycol, stir rapidly (1000 rpm), and slowly add 5% sodium hydroxide solution at 25 ° C until the solution pH When the value reaches 9, stop adding the sodium hydroxide solution, continue to stir for 10 minutes, leave it to stand for 10 hours and then centrifuge, dry the solid in a low-fire microwave for 1 hour, and roast it at 400°C for 2 hours to obtain nano-magnesium oxide with an average particle size of 40nm;
[0033] (2) Take 53 grams of La(NO 3 ) 3 ·6H 2 O was dissolved in 1000 ml of water to form a solution, fully mixed with 935 g of nano-magnesia obtained in step (1) at room temperature, dried at 110°C for 4 hours, and calcined at 380°C for 4 hours to obtain lanthanum-modifie...
Embodiment 2
[0038] The preparation method of a catalyst of the present invention is the same as in Example 1, the difference is that (1) the magnesium source used in the step is magnesium chloride, and the average particle size of nano magnesium oxide obtained is 20nm; (2) the rare earth compound used in the step is nitric acid Cerium; (5) the amount of sodium borohydride used in the step is different; obtain a catalyst of the present invention, coded as E-2, its composition is shown in Table 1, and the results of catalyst hydrogenation efficiency and anthraquinone degradation rate are shown in Table 2.
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Abstract
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