Gasoline processing method and system
A treatment method and gasoline technology, applied in the direction of hydrocarbon oil treatment products, hydrocarbon oil treatment, hydrogenation process, etc., can solve the problem of gasoline octane number loss, etc., to increase octane number, reduce olefin content, improve reaction efficiency effect
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Embodiment approach
[0049] A specific embodiment, based on the dry weight of the adsorption desulfurization catalyst and based on the weight of oxides, the zinc oxide in the adsorption desulfurization catalyst accounts for 10-90% by weight, and the silicon dioxide accounts for 5-85% by weight. %, aluminum oxide accounts for 5-30% by weight; based on the dry basis weight of the adsorption desulfurization catalyst and calculated by element weight, the content of the desulfurization active metal in the adsorption desulfurization catalyst is 5-30% by weight.
[0050] According to the present invention, the adsorption desulfurization catalyst may also contain 1-10% by weight of coke-like substances. Industrial practice shows that the carbon content on the adsorption desulfurization catalyst has an impact on the desulfurization efficiency of the adsorption desulfurization catalyst and the loss of gasoline octane number. With the increase of the carbon content of the adsorption desulfurization catalyst, ...
specific Embodiment approach
[0052] A specific embodiment, the preparation process of the molecular sieve with MFI structure can include ammonia exchange, phosphorus modification, metal component modification and roasting treatment steps, more specifically, the molecular sieve with MFI structure obtained by conventional crystallization The sodium type molecular sieve according to the molecular sieve: ammonia salt: H 2 The weight ratio of O=1:(0.1-1):(5-10) is exchanged at room temperature to 100° C. for 0.3-1 hour and then filtered to introduce phosphorus-containing compounds and compounds selected from Fe, Co, Ni, Zn, Mn, The molecular sieve is modified by one or more compounds of Ga and Sn, and then calcined at 400-800° C. for 0.5-8 hours, wherein the calcining process can also be carried out under a water vapor atmosphere. Furthermore, for the molecular sieve with MFI structure provided by the present invention, the molecular sieve can be modified by impregnation or ion exchange during the preparation ...
Embodiment 1
[0072] Stable gasoline raw material A is in contact with the mixed catalyst of adsorption desulfurization catalyst FCAS and aromatization catalyst OTAZ-C-3 (OTAZ-C-3 accounts for 7% of the total weight of the catalyst in the device) in a small continuous fluidized bed reactor to perform adsorption desulfurization and aromatization reaction. The operating conditions are: the reaction temperature is 400°C, the reactor pressure is 2.1MPa, and the weight hourly space velocity of the gasoline feedstock is 6 hours -1 , the volume ratio of hydrogen to gasoline feedstock is 75. The desulfurization and aromatization products obtained from the top of the reactor are cooled and separated to obtain tail gas and gasoline fractions. The regeneration temperature of the mixed catalyst is 550°C, and the regenerated mixed catalyst is returned to the reactor for recycling.
[0073] Distill the whole gasoline fraction above in a fractionating tower, cut it into light gasoline fraction and low-s...
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