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A technology of alkylation reaction and alkylation reactor, which is applied in chemical instruments and methods, catalysts, organic chemistry, etc., can solve the problems of short catalyst cycle life, reduce energy consumption, prolong overall life, and be easy to operate Effect
Active Publication Date: 2017-05-10
CHINA PETROLEUM & CHEM CORP +1
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[0008] The purpose of the present invention is to overcome the technical problem of short catalyst cycle life in the existing solid acid catalyzed alkylation reaction method, and provide a kind of alkylation reaction method, which can effectively prolong the alkylation reaction time using solid acid as catalyst. Cycle life of solid acid as a catalyst in the basement reaction process
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preparation example 1
[0074] With stirring, nitric acid (HNO 3 The concentration is 65% by mass, based on the total amount of slurry, HNO 3 The consumption is 2 mass %), then add clay, beating for 10 minutes, then add Y molecular sieve (purchased from Sinopec Catalyst Branch Company, specific surface area is 638m 2 / g, the pore volume is 0.37mL / g, and the unit cell constant is 2.45nm), finally add aluminum sol, silica sol and water, the slurry obtained is kneaded and extruded, and the extruded wet strip is dried at 120°C for 5 hours, followed by calcining at 450° C. for 4 hours to obtain an alkylation catalyst. The dosage of various raw materials is shown in Table 1.
preparation example 2
[0076] (1) With stirring, add nitric acid (HNO 3 The concentration is 65% by mass, based on the total amount of slurry, HNO 3 The consumption is 2% by mass), then add clay, beating for 10 minutes, then add Y molecular sieve (with preparation example 1), finally add aluminum sol, silica sol and water, the slurry obtained is kneaded and extruded, extruded The wet strip of was dried at 120° C. for 5 hours, followed by firing at 450° C. for 4 hours, thereby obtaining a molded body. The charging amount of various raw materials is the same as that of Preparation Example 1.
[0077] (2) H 2 PtCl 6 ·6H 2 O and Mn(NO 3 ) 2 Dissolve in water, then add hydrochloric acid (the addition of hydrochloric acid makes the Cl produced by HCl -The mass is 3.6 times the mass of Pt), and stirred evenly to obtain the impregnation solution. Using the method of isovolumic impregnation, impregnate the molded body prepared in the step (1) with the above impregnation solution, the impregnation is ...
preparation example 3
[0079] The difference between Preparation Example 3 and Preparation Example 2 is: in step (2), when preparing the impregnating solution, hydrochloric acid is not used, that is, the impregnating solution does not contain Cl - .
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Abstract
The invention discloses an alkylation reaction method. The alkylation reaction method is characterized in that a reaction material flow containing isoparaffin and alkene is sent to an alkylation reactor, under alkylation reaction condition, the material flow is contacted with an alkylation catalyst, the alkylation catalyst is the solid acid catalyst which is placed in the alkylation reactor as a fixed bed form, and a mode of a reaction material flow passes in and out of the alkylation reactor is periodically switched between two in and out reactor modes of up-out and down-in as well as up-in and down-out. According to the alkylation reaction method, the period life of the catalyst is effectively prolonged, regeneration frequency of the catalyst is reduced, on one hand, the alkylation reaction method is in favor of prolonging the entire life of the catalyst, and on the other hand, the energy consumption of the catalyst during a regeneration process is reduced. The method has simple operation, has no especial requirement on equipment, is suitable for the new devices, and makes simple reconstruction for the pipelines of the used device, and a control valve is added for performing the method.
Description
technical field [0001] The invention belongs to a method for preparing hydrocarbons containing more carbon atoms from hydrocarbons containing less carbon atoms, in particular to an alkylation reaction method of isoparaffins and olefins using solid acid as a catalyst. Background technique [0002] During the processing of oil products, processes such as catalytic cracking, delayed coking and thermal cracking will produce liquefied gas fractions. After recovering propylene through a gas fractionation device, the obtained C 4 C with alkanes and alkenes as the main components 4 Fraction, C 4 The isobutane and butene in the distillate can be produced by alkylation reaction to produce alkylated gasoline. Alkylated gasoline does not contain impurities such as sulfur and nitrogen, does not contain aromatics and olefins, and has a high octane number. It is an ideal blending component of clean gasoline. With the continuous improvement of my country's environmental protection requir...
Claims
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