Hydrofining method of low-grade gasoline/diesel oil

Abstract

The invention relates to a hydrofining method of low-grade gasoline / diesel oil. A catalyst uses Si-modified alumina and ETS-10 titanium silicalite molecular sieve with grain size less than 2 Mum as carriers, and Fe, Co, Ni, and Mo and / or W as active components. The Si-modified alumina accounts for 0.5-20 wt% (calculated based on SiO2) of the modified alumina; and the ETS-10 titanium silicalite molecular sieve is sodium / potassium type, the molar ratio of TiO2 to SiO2 is 0.1-0.5, and the total content, by weight, of Na2O and K2O is less than 0.2 wt%. For low-grade gasoline, the invention can decrease sulfur content to below 50 Mug / g, nitrogen content to below 50 Mug / g, and olefin content to below 30 vol%, and the product octane number loss is smaller than 3 units; and for high-sulfur diesel oil, the invention can decrease sulfur content to below 50 Mug / g and nitrogen content to below 20 Mug / g, and the diesel oil yield is higher than 99.8 wt%.

Description

technical field [0001] The invention relates to a method for hydrogenation refining of inferior gasoline and diesel oil. Background technique [0002] USP 4820403 adopts ultra-stable Y molecular sieve (25wt.%~60wt.%) and alumina as carrier, Ni-W is hydrogenation active component, wherein WO 3 The content is 15wt.%-20wt.%, and the NiO content is 1.5wt.%-4wt.%. When the content of aromatics in light cycle oil (LCO) is high, the single-stage processing flow of this catalyst has high activity of hydrofining, hydrodenitrogenation and aromatics saturation, and this catalyst can improve the selectivity of naphtha. This technology mainly produces naphtha, and the yield of diesel oil is very low. [0003] CN 01127448.4 provides a hydrogenation catalyst and its preparation method. The catalyst is composed of a metal active component and a carrier, and the metal component of the catalyst is a metal oxide MoO 3 Any two or three of , CoO and NiO, the metal active component accounts fo...

AI Technical Summary

Problems solved by technology

[0004] CN 1178238A discloses a catalyst for hydrogenation conversion of hydrocarbon oil. Its carrier is composed of molecular sieve, alumina and amorphous silica-alumina matrix. Its hydrogenation metal components are W and Ni, and additives can be added. It is suitable for ~400 petroleum distillate hydroconversion, especially suitable for the hydroconversion process of increasing the cetane number of inferior diesel oil, reducing the content of aromatics, refining and denitrogenation, using this catalyst under the condition of hydroconversion, high space velocity (1h -1 ~3h -1 ) for hydrogenation treatment of inferior diesel oil, which reduces the content of sulfur, nitrogen and aromatics, and increases the cetane number of the product by more than 10 units, but the yield of diesel oil is low

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