Hydro-upgrading method of inferior gasoline
A low-quality gasoline, hydrogenation upgrading technology, applied in the fields of hydrotreating process, petroleum industry, hydrocarbon oil treatment, etc., can solve the problem of low desulfurization rate, achieve high desulfurization rate, good desulfurization selectivity, low olefin saturation rate Effect
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preparation example Construction
[0056] Preparation of selective hydrodesulfurization catalysts 1-5:
[0057] Preparation of Catalyst 1:
[0058] Mix and knead pseudo-boehmite, silica sol, nitric acid and water, extrude, dry at 120°C, and bake at 500°C for 4 hours to obtain a composite carrier of silica and alumina; then impregnate 100g of the composite carrier in magnesium nitrate , potassium nitrate and diammonium hydrogen phosphate, aged at 20-30°C for 5h, dried at 120°C, and calcined at 480°C for 5h to prepare a catalyst carrier containing additives magnesium, potassium and phosphorus; finally prepare nitric acid The mixed solution of cobalt and ammonium molybdate is impregnated on the catalyst carrier, aged at 20-30°C for 5h, dried at 120°C, and calcined at 500°C for 4h to prepare selective hydrodesulfurization catalyst 1.
[0059] Preparation of Catalyst 2:
[0060]Pseudoboehmite, metatitanic acid, nitric acid and water were mixed and kneaded, extruded, dried at 120°C, and calcined at 500°C for 4 hour...
Embodiment 1
[0095] The hydro-upgrading treatment adopts an adiabatic fixed bed, and two reactors are connected in series. The selective hydrodesulfurization catalyst 1 is loaded in the first reactor; the octane recovery catalyst 6 is loaded in the second reactor. Raise the temperature at 50°C / h to 150°C, and feed naphtha (containing 2wt% CS 2 ) sulfuration treatment for 1 hour, and then sulfuration treatment at 230° C., 290° C. and 320° C. for 6 hours respectively to complete the sulfuration treatment of the catalyst.
[0096] After the vulcanization treatment is completed, switch to full fraction FCC raw material gasoline 1, at a reaction pressure of 1.5MPa and a volume space velocity of 4.0h -1 , under the condition of hydrogen-oil ratio of 250, the inlet temperature of the first-stage reactor is controlled at 180°C, and the inlet temperature of the second-stage reactor is controlled at 295°C. After running for 800 hours, sample and analyze the composition of upgraded products, sulfur ...
Embodiment 2
[0098] The hydro-upgrading treatment adopts an adiabatic fixed bed, and two reactors are connected in series. The selective hydrodesulfurization catalyst 2 is loaded in the first reactor; the octane recovery catalyst 7 is loaded in the second reactor. The vulcanization treatment method is the same as in Example 1.
[0099] After the vulcanization treatment is completed, switch to full fraction FCC raw material gasoline 2, at a reaction pressure of 1.5MPa and a volume space velocity of 4.0h -1 , under the condition of hydrogen oil ratio of 300, the inlet temperature of the first-stage reactor is controlled at 190°C, and the inlet temperature of the second-stage reactor is controlled at 300°C. After running for 800 hours, sample and analyze the composition of upgraded products, sulfur content, octane number and liquid yield every 24 hours. The results are shown in Table 4.
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