Reaction equipment and method for preparing alkylated gasoline by sulfuric acid alkylation process

Abstract

The invention discloses reaction equipment and a reaction method for preparing alkylated gasoline by a sulfuric acid alkylation process. The equipment comprises a liquid inlet pipe, an impact spray nozzle, a shell, an upper-layer filler, a lower-layer filler, a cooling coil pipe, a cooling jacket, a flow guiding cylinder and stirring paddles; the flow guiding cylinder is conical and used for introducing a liquid thrown out from the upper-layer filler into the inner edge of the lower-layer filler; the liquid inlet pipe is located at the upper part of the shell, and the impact spray nozzle is located at the inner edge of the upper-layer filler; the upper-layer filler and the lower-layer filler are connected with a magnetic driving device through a rotating shaft, and the cooling coil pipe isarranged between the outer edge of a rotating filler layer and the shell; and the cooling jacket is arranged at the outer side of the shell, the flow guiding cylinder is arranged below the lower-layer filler, the flow guiding cylinder is connected with the bottom of the shell, the part, located in the middle of the flow guiding cylinder, of the magnetic rotating shaft is provided with two layersof stirring paddles, the two layers of stirring paddles are connected with the magnetic driving device, and the upper part of the flow guiding cylinder is connected with a liquid outlet. The equipmentprovided by the invention realizes high-efficiency rapid mixing of mixed hydrocarbons and concentrated sulfuric acid under low-temperature conditions, improves the efficiency of the alkylation reaction, reduces acid consumption, and improves the octane number of the product.

Description

technical field [0001] The invention relates to an alkylation device and method, in particular to a reaction device and method for preparing alkylated gasoline by sulfuric acid alkylation, and belongs to the technical field of alkylated oil preparation. Background technique [0002] The alkylated oil obtained by the alkylation reaction of isobutane and butene under the action of an acidic catalyst is one of high-quality gasoline blending components, with high octane number, low sensitivity, low vapor pressure (RVP), no Containing olefins, aromatics and sulfur, high combustion calorific value, complete combustion, and no environmental pollution. With the improvement of my country's oil product standards, the demand for alkylated oil will increase significantly. [0003] At present, the industrial production of alkylated oil is mainly based on concentrated sulfuric acid catalytic method, using Stratco reactor, which is a horizontal eccentric reactor with a sleeve, U-shaped tu...

AI Technical Summary

Problems solved by technology

Although the three above-mentioned alkylation reactors with similar structures have higher single-pass conversion rates, the residence time of the reaction materials in the reactor is too short, and the reaction in the reforming stage of the alkylation reaction is not sufficient, so that the C8 content in the product not tall

The alkylation reactors disclosed in Chinese patents CN104667859A and CN104549116A are based on the above three disclosed reactors, and the rotating packed bed is expanded from one stage to two stages and three stages, and different types of rotating components are added to each stage , which greatly increases the processing difficulty and cost of the reactor, and the residence time of the reactants in the reactor is not significantly improved, the reforming reaction of the alkylation reaction is not sufficient, and the C8 content in the product still needs to be further increased

Chinese patent CN106281432A discloses a system device and production method for preparing alkylated oil using sulfuric acid as a catalyst. The system mainly consists of a reactor unit 100, a catalyst and hydrocarbon circulation unit 200, a separator unit 300, and an isobutane circulation unit 500. Composed of a fractionator unit 400, the reactor adopts at least one high-gravity reactor. After the reaction, the mixture partly enters the catalyst and hydrocarbon circulation unit, and the unreacted C4 and catalyst circulate into the reactor unit to continue the reaction, which increases the reaction system. The occurrence of internal side reactions reduces the quality of the product

Images