Selective hydrogenation desulfurization transmutation method for gasoline
A hydrodesulfurization and selective technology, applied in refining to remove heteroatoms, etc., can solve the problems of hydrogen consumption, gasoline octane number decline, etc., and achieve the effect of reducing losses and good hydrodesulfurization selectivity
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Embodiment 1
[0026] Take by weighing 274.2 grams (dry basis) of aluminum oxide hydrate (trade name SB, German Condea company product, wherein gibbsite content 85% by weight) prepared by alkoxy aluminum hydrolysis method, and extrude into a circumscribed circle with a diameter of The 1.4 mm trefoil strip was dried at 120° C. for 4 hours and calcined at 1000° C. for 4 hours to obtain carrier Z1.
[0027] Molybdenum and cobalt are introduced into the carrier Z1 by step-by-step impregnation. First, weigh 5.33 grams of ammonium molybdate, dissolve it into 90 milliliters of solution with 16% by weight of NH3 solution, impregnate 100 grams of carrier Z with this solution for 14 hours, dry at 120°C for 4 hours, and roast at 420°C for 4 hours; after that, weigh 8.94 g of cobalt nitrate was dissolved in water to form 80 ml of solution, impregnated with this solution to impregnate Z1 loaded with molybdenum again, dried at 120° C. for 4 hours, and calcined at 420° C. for 4 hours to obtain catalyst C1....
Embodiment 2
[0030] Take by weighing 200 grams (dry basis) of alumina precursor (prepared by sodium metaaluminate-sodium sulfate method, trade name Changling Dry Rubber Powder, Changling Refinery Catalyst Factory product, wherein gibbsite content 68 weight %), Extruded into a three-lobed strip with a circumscribed circle diameter of 1.4mm on an extruder, dried at 120°C, and calcined at 1050°C for 4 hours to obtain the carrier Z2.
[0031] Molybdenum and cobalt are introduced into the carrier Z2 by step-by-step impregnation. First, weigh 11.1 grams of ammonium molybdate, dissolve it into 90 milliliters of solution with 16% by weight NH3 solution, impregnate 100 grams of carrier Z with this solution for 24 hours, dry at 120°C for 4 hours, and roast at 420°C for 4 hours; after that, weigh 5.0 g of cobalt nitrate was dissolved in water into 80 ml of solution, impregnated with this solution to impregnate Z2 loaded with molybdenum again, dried at 120° C. for 4 hours, and calcined at 420° C. for ...
Embodiment 3
[0033] Weigh 200 grams (dry basis) of the alumina precursor (the same as in Example 2), extrude it into a trilobal strip with a circumscribed circle diameter of 1.4 mm on an extrusion machine, dry it at 120 ° C, and roast it at 1100 ° C for 4 hours to obtain Carrier Z3.
[0034] Molybdenum and cobalt were introduced into the carrier Z3 by step-by-step impregnation. First, take 18.1 grams of ammonium molybdate, dissolve it into 90 milliliters of solution with 16% by weight NH3 aqueous solution, impregnate 100 grams of carrier Z with this solution for 34 hours, dry at 120°C for 4 hours, and roast at 420°C for 4 hours; after that, weigh 14.0 g of cobalt nitrate was dissolved in water to form 80 ml of solution, impregnated with this solution to impregnate Z3 loaded with molybdenum again, dried at 120° C. for 4 hours, and calcined at 420° C. for 4 hours to obtain catalyst C3. The content of cobalt and molybdenum oxides in C3 and the crystal phase of the carrier are listed in Table...
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