Alkylation method and device for isobutane and C3-C5 olefins

An isobutane and alkylation technology, which is applied in the treatment of hydrocarbon oil, liquid hydrocarbon mixture production, petroleum industry, etc., can solve the problems of untimely withdrawal of reaction heat, unfavorable alkylation reaction, etc. The effect of catalyst consumption and prevention of system temperature rise

Active Publication Date: 2019-02-15
PETROCHINA CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At the same time, the reaction heat is withdrawn through the heat exchanger outside the reactor, and the reaction heat in the reactor is not withdrawn in time, which is unfavorable for the alkylation reaction

Method used

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  • Alkylation method and device for isobutane and C3-C5 olefins
  • Alkylation method and device for isobutane and C3-C5 olefins
  • Alkylation method and device for isobutane and C3-C5 olefins

Examples

Experimental program
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Effect test

Embodiment 1

[0027] see figure 1 As shown, the reaction device of the present invention includes: a rotating packed bed reactor 1 , a packed bed reactor 2 and a distillation column 3 . The packed bed reactor 2 is divided into a packing reaction section 13 and a settling section 14 up and down.

[0028] The raw material and the liquid alkylation catalyst enter the rotary packed bed reactor 1 through the feeding pipe 4 and the catalyst circulation pipe 5 respectively, and the alkylation reaction starts in the packing layer of the rotary packed bed reactor 1 . The raw material and liquid alkylation catalyst are thrown out of the rotating packed bed reactor 1 under the action of centrifugal force when the packing layer of the rotating packed bed reactor 1 rotates, and unreacted raw materials, products and liquid alkanes are formed at the outlet of the rotating packed bed reactor 1. The reaction material mixed with the base catalyst, the reaction material flows into the packed bed reactor 2, c...

Embodiment 2

[0031] The operation mode and operation process are the same as in Example 1, the catalyst is sulfuric acid with a mass concentration of 99.8%, the molar ratio of isobutane to olefin in the raw material is 10:1, and the average residence time of the reaction materials in the packing reaction section 13 is 60min. The filler used in the packed bed reactor 2 is a Pall ring. The reaction material is continuous in the gas phase in the packing reaction section 13, the reaction temperature is controlled at -5°C, the rotor speed of the rotary packed bed reactor 1 is controlled at 2500rpm, and the volume ratio of liquid hydrocarbons to sulfuric acid in the reaction system is 1:1. The octane number of the obtained alkylate was 98.1 (research octane number), and the catalyst consumption was 31 kg / (t alkylate).

Embodiment 3

[0033] The operation mode and operation process are the same as in Example 1, the catalyst is sulfuric acid with a mass concentration of 89%, the molar ratio of isobutane to olefin in the raw material is 300:1, and the average residence time of the reaction materials in the packing reaction section 13 is 1min. The packing used in the packed bed reactor 2 is corrugated net packing. The reaction temperature was controlled at 20° C., the rotational speed of the rotor of the rotary packed bed reactor 1 was controlled at 100 rpm, and the volume ratio of liquid hydrocarbons to sulfuric acid in the reaction system was 3:1. The octane number of the obtained alkylate was 98.9 (research octane number), and the catalyst consumption was 21 kg / (t alkylate).

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Abstract

The invention discloses a method and a device for alkylating isobutene and C3-C5 olefins. The method includes the steps of putting reaction materials containing the isobutene and the C3-C5 olefins and a liquid alkylating catalyst into a rotating packed bed reactor and starting alkylation reaction; then, putting the reaction materials into a packing reaction section of the rotating packed bed reactor for continuous reaction, and regulating pressure to control a reaction temperature so as to enable the reaction materials to pass through the packing reaction section in the form of a gas / liquid mixed phase; separating the catalyst, liquid hydrocarbon and a gas-phase component from the reaction materials so as to separate out an alkylated product from the liquid hydrocarbon. The method is simple in process, convenient to operate and easy to implement, can make the most of dispersion effects of the rotating packed bed reactor on the reaction raw materials and the liquid alkylating catalyst and is capable of removing reaction heat timely, improving the alkylated oil quality and reducing catalyst consumption.

Description

technical field [0001] The invention relates to a method and device for alkylating isobutane and C3-C5 olefins, belonging to the field of petroleum refining. Background technique [0002] The alkylated oil produced by the alkylation of isobutane and C3-C5 olefins has the characteristics of high octane number (RON value is generally 90-96), low vapor pressure, low content of aromatics and olefins, and good sensitivity. Clean and environmentally friendly high-octane gasoline blending components. With the increasingly stringent restrictions on olefins, aromatics and sulfur content in gasoline by environmental protection regulations, the importance of alkylate has become increasingly prominent. [0003] At present, the liquid acid alkylation process using sulfuric acid or hydrofluoric acid as a catalyst is widely used in the oil refining industry. The liquid acid alkylation process is characterized by good selectivity, low price, recyclability and continuous activity, so that ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C10G50/00
CPCC10G50/00C10G2300/1081C10G2300/1088
Inventor 何涛波高飞董卫刚胡雪生张兆前王若欣王苑
Owner PETROCHINA CO LTD
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