Coal liquefied oil boiling bed hydrogenation technique
A technology of coal liquefied oil and fluidized bed, which is applied in the direction of refining to remove heteroatoms, etc., can solve the problems of short service life of catalyst, increase of investment cost, catalyst deactivation, etc., to improve mechanical strength and wear resistance, and prolong service life , the effect of reducing production costs
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[0023] The preparation method of the special hydrogenation catalyst for coal liquefied oil of the present invention comprises the following process:
[0024] (1). Alumina modified with phosphorus and boron additives, selectively adding nano-silica powder, fibrous additives, adhesive and peptizer solution, etc. are mixed evenly, kneaded into a paste, and extruded into strips;
[0025] (2). Dry the above molded product at 100-150°C for 0.5-24 hours, and roast at 350-700°C for 1-12 hours to obtain a catalyst carrier;
[0026] (3). Prepare impregnating solutions containing VIB group metals and VIII group metals respectively;
[0027] (4). The catalyst carrier obtained in step (2) is immersed in the solution prepared in step (3), dried at 100-150°C for 0.5-24 hours, and calcined at 350-700°C for 1-12 hours to obtain the finished catalyst .
[0028] The phosphorus and boron modified alumina used in the special hydrogenation catalyst for coal liquefied oil of the present invention ...
Embodiment 1
[0043] Preparation of modified alumina G-1
[0044] Take the filter cake after washing the alumina precursor prepared by the carbonization method, measure its dry basis as 30wt%, take 1500 grams of the filter cake, add 2.5 liters of deionized water, make a slurry, heat up to 65 ° C, stir for 1 hour, add 90 Gram 85wt% phosphoric acid solution, filter to obtain filter cake, add 2.0 liters of deionized water, beating, be warming up to 70 ℃, and add 86 grams of boric acid, and use concentration to be 10g NH 3 Adjust the pH value of the solution to 6 per 100ml of ammonia solution, stir for 1 hour, filter and dry at 110°C for 4 hours, the sample is G-1, and its physical and chemical properties are shown in Table 1.
Embodiment 2
[0046] Preparation of modified alumina G-2.
[0047] Get 800 grams of filter cake (30wt% on a dry basis) after washing the aluminum oxide precursor prepared by the aluminum sulfate method, add 3 liters of deionized water, stir and heat up to 85 ° C, and add 53 grams of 85wt% phosphoric acid solution, filter to obtain Filter cake, add 2.5 liters of deionized water, make a slurry, heat up to 70 ° C, and add 120 grams of boric acid, and use a concentration of 10 g NH 3 Adjust the pH of the solution to 6.5 per 100ml of ammonia solution, stir for 1 hour, continue stirring for 30 minutes, and dry at 110°C for 4 hours. The physical and chemical properties of sample G-2 are shown in Table 1.
[0048] Table 1 Physicochemical properties of samples
[0049] Example number
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