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A kind of alkylation reaction method and pulse flow reactor

An alkylation reaction, pulse flow technology, applied in chemical/physical/physical-chemical stationary reactors, production of liquid hydrocarbon mixtures, petroleum industry, etc. problems such as poor effect, to achieve the effect of low alkene ratio, prevention of violent vibration of the bed, and less side reactions

Active Publication Date: 2017-12-29
HUIZHOU YUSSEN CHEM CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the dispersion effect of the gas phase is poor in this method. After the gas phase circulates through the compressor system in the reaction system, it is equivalent to the compressor doing useless work. The alkanes in the reaction system are relatively high, which increases the operating load of the subsequent separation system.

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  • A kind of alkylation reaction method and pulse flow reactor
  • A kind of alkylation reaction method and pulse flow reactor
  • A kind of alkylation reaction method and pulse flow reactor

Examples

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Embodiment 1

[0041] This embodiment is a method for alkylation of light olefins and isobutane, as follows:

[0042] In the alkylation reactor with a diameter of 3500mm and a height of 2500mm, it includes a liquid phase distribution area, a reaction area, a gasification area and a liquid collection area. The reaction area is equipped with 10 sections of variable-aperture wire mesh structured packing, and the height of each section of packing is 1000mm, the distance between two adjacent sections of packing is 80mm, the wire mesh structured packing is composed of PP yarn and wire mesh alternately superimposed and bundled, the diameter of the wire is 1mm, and the diameter of the wire mesh and gauze mesh is 2.5mm, 2.0mm, 1.5mm, 1.0 mm, the overall porosity of the filler in the reaction zone is about 49%. The top pressure of the control reaction zone is 320KPa, the bottom pressure is 18KPa, the pressure drop of the first packing is 20KP, the pressure drop of the second packing is 25KPa, the pres...

Embodiment 2

[0045] This embodiment is a method for alkylation of light olefins and isobutane, as follows:

[0046] In the alkylation reactor with a diameter of 4400mm and a height of 3200mm, it includes a liquid phase distribution area, a reaction area, a gasification area and a liquid collection area. The reaction area is equipped with 14 sections of variable-aperture wire mesh structured packing, and the height of each section of packing is The distance between two adjacent sections of packing is 90mm. The wire mesh structured packing is composed of four strands of polypropylene wire and metal wire mixed wire mesh, which are superimposed and bundled. The diameter of the polypropylene wire is 0.5mm, and the diameter of the metal wire is 2mm. The pore diameters are 2.5mm, 2.3mm, 1.3mm, 1.0mm, and the overall porosity of the packing in the reaction zone is about 40%. The top pressure of the control reaction zone is 360KPa, the bottom pressure is 21KPa, the pressure drop of the first packin...

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Abstract

The invention discloses an alkylation reaction method and a pulse flow reactor. According to the alkylation reaction method, an air phase is formed through alkane vaporization and heat absorption under the condition of full-liquid-phase feeding by changing a filter structure in the reactor, and then air and liquid phases are induced to form a pulse flow and can be in a stable pulse flow state in reaction; in the later reaction period, due to concentration reduction of reacted raw materials and for further improvement of the reaction effect, the air and liquid phases can be in a higher-strength pulse flow state to achieve efficient material mixing, accordingly the achieved olefin conversion rate is up to 100%, and an octane value of a product is up to 93-97. In addition, the alkylation reaction method is simple in process operation condition and is suitable for industrial production, mass and heat transfer efficiency of materials is effectively improved, reaction temperature is low, reaction effect is good, the alkane-olefin ratio is low, acid consumption is low, an air resistance phenomenon occurred in the reactor due to air phase accumulation can be further prevented, and severe vibration of a bed layer is prevented.

Description

technical field [0001] The invention relates to the technical field of alkylation oil preparation, in particular to an alkylation reaction method of light olefins and isobutane and a pulse flow reactor applied to the method. Background technique [0002] Alkylate oil produced from light olefins and isobutane under the catalysis of concentrated sulfuric acid has a high octane number and is an ideal gasoline blending component. However, as one of the reaction raw materials, isobutane has poor miscibility with catalyst concentrated sulfuric acid. In addition, the alkylation reaction is an exothermic reaction, and the optimum reaction temperature range is -5 to 5°C. The heat of reaction will intensify the occurrence of side reactions of olefin polymerization. Therefore, the sulfuric acid alkylation process must not only realize the full mixing of the two phases of acid and hydrocarbon, but also remove the heat of reaction in time to ensure that the alkylation reaction is at a co...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J19/24C10G50/00
Inventor 胡先念罗庆金余良军叶文马瑞玮
Owner HUIZHOU YUSSEN CHEM CO LTD