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A kind of alkylation reaction method

A technology for alkylation reaction and alkylation reactor, which is applied in the field of alkylation reaction, can solve problems such as short cycle life of catalyst, and achieve the effects of reducing energy consumption, prolonging cycle life and easy operation.

Active Publication Date: 2018-05-18
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[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

Method used

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  • A kind of alkylation reaction method
  • A kind of alkylation reaction method
  • A kind of alkylation reaction method

Examples

Experimental program
Comparison scheme
Effect test

preparation example 1

[0084] 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

[0086] (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.

[0087] (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

[0089] 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 present invention discloses an alkylation reaction method, which comprises that n catalyst bed layers filled with a solid acid catalyst are provided, wherein n is an integer of not less than 2; and a reaction stream is introduced into the catalyst bed layer and contacts the solid acid catalyst by using the following method, wherein partial alkylation reaction raw material, optional circulation isoparaffin and optional circulation alkylation reaction product are mixed, the entering-catalyst bed layer mode and the exiting-catalyst bed layer mode of the obtained inlet stream are periodically switched between the following modes, the mode 1 is that the inlet stream is introduced into the first catalyst bed layer, and the mode 2 is that the inlet stream is introduced into the nth catalyst bed layer, and the remaining partial alkylation reaction raw material is introduced into the catalyst bed layer positioned on the downstream of the inlet stream entering catalyst bed layer. With the method of the present invention, the cycle life of the catalyst can be effectively prolonged, the regeneration frequency of the catalyst can be reduced, the total life of the catalyst can be easily prolonged, and the energy consumption during the catalyst regeneration process can be reduced.

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 a solid acid 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 requireme...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C07C2/58C10G50/00B01J29/16
CPCB01J29/166B01J2229/18C10G50/00Y02P20/50Y02P20/584
Inventor 赵志海李永祥胡合新杨克勇慕旭宏张久顺龙军
Owner CHINA PETROLEUM & CHEM CORP