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A kind of apparatus and process method for alkylation reaction

A technology of alkylation reaction and alkylation reactor, which is applied in alkylation reaction unit, reactor for alkylation reaction of isoparaffin and olefin and in the field of alkylation reaction, which can solve the problem of affecting alkylate oil products. Problems such as low mass, mass transfer and reaction rate, and side reactions of olefin polymerization, to achieve the effect of improving reaction rate and product selectivity, improving alkylation reaction rate, and reducing side reactions

Active Publication Date: 2020-04-14
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] CN203295447U has proposed a kind of tube-and-tube alkylation reactor, the tube side is the reaction area, the shell side is the heat exchange area, and the two ends of the tube body are respectively the pre-distribution area and the reactant outflow area, and the reactor is suitable for isoparaffin The reaction of high-octane alkylate with light olefins under the action of liquid acid catalyst, because this method is a conventional tube reactor, there are many problems such as complex equipment structure, low production efficiency, serious side reactions of materials in the tube, etc.
[0006] Judging from the current status of alkylation technology at home and abroad, the following problems still exist in the alkylation reaction process: (1) Since the alkylation reaction is an exothermic reaction, the material distribution is uneven (including radial material distribution and axial material distribution) ) will intensify the occurrence of side reactions of olefin polymerization and affect the product quality of alkylated oil; The mass and reaction rate are low, so it is necessary to provide the surface area for the acid hydrocarbon reaction, and it is also very important to provide the mass transfer driving force of the reaction material; (3) The heat of reaction (including radial reaction heat and axial reaction heat) in the reaction process needs to be timely Remove it, otherwise local hot spots will appear, side reactions will occur and the reaction efficiency will be reduced. The ideal way is that the reactor always maintains the constant temperature reaction process of the initial state, but in fact it can only be infinitely close and cannot be achieved.

Method used

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  • A kind of apparatus and process method for alkylation reaction
  • A kind of apparatus and process method for alkylation reaction
  • A kind of apparatus and process method for alkylation reaction

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Embodiment 1

[0039] By adopting the method of the present invention, three groups of alkylation reaction sections and three-phase separators at the bottom are set, wherein the alkylation reaction section is composed of a packing tube bundle area and a refrigerant microbubble area, and the packing tube bundle is only made of the packing tube bundle of the present invention In the way of internal packing, the refrigerant microbubbles are dispersed in the tube bundle by atomized refrigerant microbubbles, and the atomized refrigerant from the gas-liquid refrigerant aspirator is dispersed into microbubbles, which act on the filler tube bundle. A three-phase separator is connected to the bottom of the reactor to separate vaporized refrigerant, crude alkylate and mixed sulfuric acid. The reaction conditions and results are shown in Table 1 and Table 2, respectively.

Embodiment 2

[0041] By adopting the method of the present invention, three groups of alkylation reaction sections and three-phase separators at the bottom are arranged, wherein the alkylation reaction section is composed of a packing tube bundle area, a refrigerant vaporization area and a refrigerant microbubble area, and the packing tube bundle The structure is composed of a material pre-mixing section and an internal packing section (height ratio 1:12). A refrigerant vaporization section, refrigerant vaporization pipeline and corresponding pressure control system are arranged at the lower part of each group of alkylation reaction sections. The micro-bubbles of the agent adopt the atomized refrigerant micro-bubble dispersion tube bundle, and the atomized refrigerant from the gas-liquid refrigerant aspirator is dispersed into micro-bubbles, which act on the filler tube bundle. A three-phase separator is connected to the bottom of the reactor to separate vaporized refrigerant, crude alkylate...

Embodiment 3

[0043] By adopting the method of the present invention, three groups of alkylation reaction sections and three-phase separators at the bottom are set, wherein the alkylation reaction section is composed of a packing tube bundle area, a refrigerant gasification area and a refrigerant microbubble area, and the packing tube bundle It is composed of a material pre-mixing section and an internal packing section (height ratio 1:8), and a refrigerant vaporization section, refrigerant vaporization pipeline and corresponding pressure control system are arranged at the lower part of each group of alkylation reaction sections; The bubble adopts atomized refrigerant micro-bubble dispersion tube bundle, and the atomized refrigerant from the gas-liquid refrigerant aspirator is dispersed into micro-bubbles, which act on the packing tube bundle. The bottom of the reactor is connected with a three-phase separator to separate vaporized refrigerant, crude alkylate and mixed sulfuric acid. The rea...

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Abstract

The invention discloses an alkylation reaction device and technique. According to the alkylation reaction device, an alkylation reaction area inside an alkylation reactor is composed of a vertically filled filler pipe bundle and an atomized coolant microbubble dispersing pipe bundle, wherein the filler pipe bundle is composed of an external barrel and internal fillers, the internal fillers are orderly woven fillers woven from fiber bundles, and the fiber bundles are at least composed of lipophilic and hydrophobic or hydrophilic and lipophobic fiber bundles; the atomized coolant microbubble dispersing pipe bundle is arranged around the filler pipe bundle and disperses gas-liquid coolant mixtures, which are uniformly atomized by a coolant circulating sucker, into microbubbles. The alkylationreaction device and technique can promote uniform mixing of reaction materials, maintain microscale temperature uniformity during reaction and improve selectivity and reaction yield of alkylation reaction, thereby having the advantages of high reaction efficiency, less side reaction and the like.

Description

technical field [0001] The invention belongs to the field of petrochemical industry, and specifically relates to an alkylation reaction device and a process method, in particular to a reactor and an alkylation reaction method using sulfuric acid as a catalyst for the alkylation reaction of isoparaffins and olefins. Background technique [0002] The alkylation process is an important clean gasoline processing technology in the refining process. The product alkylate oil is an ideal gasoline blending component, with no aromatics, no olefins, low sulfur, low vapor pressure, high octane number ( RON 94~96, MON 92~94) and other advantages. The current mainstream technology is liquid acid alkylation technology, mainly including sulfuric acid alkylation and hydrofluoric acid alkylation. Due to the strong volatility and toxicity of hydrofluoric acid, all the currently operating and under construction in my country Alkylation method for sulfuric acid. In order to reduce side reaction...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J19/24C10G50/00
CPCB01J19/0013B01J19/24B01J19/2415C10G50/00C10G2300/1081C10G2300/1092
Inventor 金平方向晨杨秀娜王海波齐慧敏
Owner CHINA PETROLEUM & CHEM CORP
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