Gasoline processing method and system
A processing method and gasoline technology, which are applied in the fields of hydrocarbon oil processing products, hydrocarbon oil processing, hydrotreating processes, etc., can solve problems such as the loss of gasoline octane number, improve octane number, reduce gasoline vapor pressure, and improve reaction The effect of efficiency
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Embodiment approach
[0056] 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.
[0057] 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
[0059] 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
[0083] The stable gasoline A is distilled in a fractionation tower, cut into light, medium and heavy gasoline fractions, and the final boiling point of the light gasoline fraction is controlled at 60-70°C (according to ASTM D86 standard), and the final boiling point of the medium gasoline fraction is 80-80°C. 130°C. Among them, the light gasoline fraction obtained by distillation of stable gasoline A is marked as LCN-A, the medium gasoline fraction is marked as MCN-A, and the heavy gasoline fraction is marked as HCN-A. The properties are shown in Table 3. The light gasoline fraction is subjected to desulfurization and de-diene pretreatment in the refining reactor under the condition of hydrogen, so that the sulfur content and diene content in the light gasoline fraction are both reduced to below 10ppm, and then mixed with methanol into the etherification reactor for etherification Reaction, etherification reaction conditions are: reaction temperature 55-80 ℃, space velocity 1....
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