Alkylation reactor and alkylation method

Abstract

The invention discloses an alkylation reactor and an alkylation method. The alkylation reactor comprises a settling area, a reaction area and a mixing area, wherein the mixing area consists of a cylindrical mixing chamber, charging pipes and outlet nozzles, the mixing area communicates with the reaction area through the outlet nozzles, the reaction area is provided with alkene charging pipes, a cylindrical partition plate, a heat exchange pipe bundle and deflection baffles and is divided into two portions by the cylindrical partition plate, a central cylindrical space serves as a fluid rising zone, an external annular space serves as a fluid backflow zone, the rising zone and the backflow zone communicate with each other at the top parts and the bottom parts, the settling area is provided with a liquid rising pipe, a swirling component and a cylindrical baffle and is divided into two portions, i.e., a central cylindrical space and an external annular space by the cylindrical baffle, the spaces of the two portions communicate with each other at the top parts and the bottom parts, the liquid rising pipe and the swirling component are located in the central cylindrical space of the settling area, the bottom of the liquid rising pipe communicates with the rising zone of the reaction area, the top of the liquid rising pipe is connected with the swirling component, and the external annular space of the settling area is connected with a liquid acid outlet pipe and a hydrocarbon mixture outlet pipe. By using the alkylation reactor and the alkylation method, a liquid acid catalyst and alkane can be adequately mixed in the mixing area of the reactor, and polymerization among alkenes is reduced; and the reaction temperature is low, the acid-hydrocarbon separation is rapid, and the acid consumption is low.

Description

technical field [0001] The invention belongs to the field of petroleum refining, and relates to a liquid acid catalyst C 4 Alkylation production method. More particularly, the present invention further provides an alkylation reactor for realizing sufficient mixing and reaction of alkanes, olefins and liquid acid catalysts and separation of acid hydrocarbons. Background technique [0002] Alkylation is a process in which isoparaffins react with olefins to produce alkylated products in the presence of a strong acidic catalyst. In the field of petroleum refining, alkylation is isobutane and C 3 ~C 5 The reaction of olefins in the presence of strong acids to produce an alkylate with a higher octane number than the feedstock, boiling in the gasoline range. Alkylate oil has the characteristics of no aromatics, no olefins, low sulfur, low vapor pressure, high octane number (RON94~96, MON92~94). The catalysts commonly used in industry are concentrated sulfuric acid and hydroflu...

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Problems solved by technology

But because the liquid reaction of this reactor takes place in the riser, the material stays in the riser for a short time, and the reactor is not equipped with a heat extraction device, which requires a long reaction time and a low temperature for the alkylation. Suitable for

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