Hydrodesulfurization method for light oil
A technology for hydrodesulfurization and light oil is applied to the field of hydrodesulfurization of light gasoline fractions including hydrodesulfurization, which can solve the problems of unqualified mercaptan sulfur and the like, and achieve the effect of less loss of octane number.
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[0024] The concrete process of the preparation method of hydrodemercaptan catalyst used in the present invention is as follows:
[0025] (1) Mix nanometer NaZSM-5 molecular sieve, inorganic refractory oxide, extrusion aid and peptizing acid evenly, knead, extrude, and then dry and roast,
[0026] (2) At normal temperature, put the roasted product obtained in step (1) into an aqueous solution of ammonium nitrate, soak it for 1 to 6 hours with a volume ratio of 1:3 to 10, wash it with deionized water, dry and roast it, Prepare the nanometer HZSM-5 catalyst carrier.
[0027] (3) Put the catalyst carrier obtained in step (2) into a hydrothermal treatment furnace, and heat it at 350-700°C at a volumetric space velocity of 1-9h -1 Passing ammonia concentration of 0.05-4.0mol / L ammonia-containing steam for modification treatment for 1-10 hours to obtain a modified catalyst carrier;
[0028] (4) supporting copper and zinc on the modified catalyst carrier obtained in step (3) by impr...
Embodiment 1
[0037] Take by weighing 200g and synthesize nanometer NaZSM-5 molecular sieve by the method for embodiment 1 among CN1240193A, and 50g Al 2 o 3 powder, 5g sage powder mixed evenly, add 2.6gHNO 3 The aqueous solution, after kneading, is extruded into a cylindrical shape in an extruder, dried at 120°C overnight, and then calcined at 540°C for 4 hours. Mix the calcined catalyst with 0.4mol / L NH 4 NO 3 The aqueous solution is impregnated at room temperature for 1 to 6 hours according to the sieve liquid volume ratio of 1:3~10, poured off the exchange liquid, repeats the above operation, then washes with the same volume of deionized water until neutral, and dries at 120°C for 5 hours. Calcined at 540°C for 4 hours to obtain nano-HZSM-5 catalyst carrier, wherein the content of nano-HZSM-5 is 76.9%, Al 2 o 3 The content is 23.1%. Then put the nanometer HZSM-5 in the constant temperature section of the hydrothermal treatment furnace, and treat it with ammonia water vapor with a ...
Embodiment 2
[0039] Weigh 30 grams of copper nitrate, 18 grams of zinc nitrate and 60 milliliters of deionized water, mix them, and dissolve them at 60° C. for 1 hour to obtain 65 milliliters of co-immersion solution containing copper and zinc. Take 100 grams of the water-treated HZSM-5 carrier prepared in Example 1 and put it into the co-immersion solution containing copper and zinc for 8 hours, then dry it at 120°C for 8 hours, and roast it at 500°C for 8 hours to obtain the catalyst RM- 1.
[0040] The physical properties of the RM-1 catalyst are listed in Table 1.
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