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Method of producing alkylbenzene by high gravity reactor

A high-gravity reactor and alkylbenzene technology, applied in chemical instruments and methods, bulk chemical production, containing molecular sieve catalysts, etc., can solve the problems that are not conducive to long-term stable operation of the device, prolong the residence time of the catalyst bed, and aggravate the catalyst To avoid problems such as carbon deposition, to achieve the effect of high selectivity of target products, inhibition of carbon deposition and deactivation, and improvement of selectivity and yield

Active Publication Date: 2019-01-22
PETROCHINA CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The above-mentioned fixed bed process will inevitably cause the reaction product from the previous zone to go through the catalyst bed again, thus prolonging the residence time of the reactants in the catalyst bed and increasing the degree of side reactions. The long-term contact of the layer intensifies the possibility of carbon deposition on the catalyst, which is not conducive to the long-term stable operation of the device
[0005] In addition, the product of the above-mentioned alkylation reaction is usually a mixture of alkylbenzenes, and it is difficult to obtain the target product with high selectivity. In order to process the mixture of alkylbenzenes into the target product, subsequent processing techniques need to be added, which is not conducive to popularization and application.

Method used

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  • Method of producing alkylbenzene by high gravity reactor
  • Method of producing alkylbenzene by high gravity reactor

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] Such as figure 2 As shown, the MCM-56 molecular sieve catalyst is installed in the rotor 3 of the high gravity reactor to form an alkylation catalyst bed 2; through the continuous rotation of the rotor 3, the alkylation catalyst bed 2 is driven to continue to rotate to form a 200g Hypergravity level.

[0034] combine figure 1 As shown, benzene and methanol are passed into the high-gravity reactor from the reaction raw material inlet 1 with a molar ratio of 8:1, and the alkylation reaction occurs in contact with the continuously rotating alkylation catalyst bed 2; wherein, the alkylation is controlled The reaction temperature is 350°C, the absolute pressure is 1.0MPa, and the mass space velocity is 10h -1 .

[0035] After the alkylation reaction is completed, the product is discharged from the reaction product outlet 4 of the high-gravity reactor, and then enters the heat exchanger for condensation. After condensation, samples are collected and analyzed by gas chroma...

Embodiment 2

[0040] The ZSM-5 molecular sieve catalyst is installed in the rotor of the supergravity reactor to form an alkylation catalyst bed; through the continuous rotation of the rotor, the alkylation catalyst bed is driven to continue to rotate, forming a supergravity level of 300g.

[0041]Benzene and methanol are passed into the high-gravity reactor at a molar ratio of 4:1, and the alkylation reaction occurs in contact with the continuously rotating alkylation catalyst bed; wherein, the temperature of the alkylation reaction is controlled at 470°C, and the absolute pressure is 0.5MPa, and the mass space velocity is 15h -1 .

[0042] After the alkylation reaction is finished, the product is discharged from the reaction product outlet of the high-gravity reactor, and then enters the heat exchanger for condensation. After condensation, samples are collected and analyzed by gas chromatography to determine the composition of the alkylation product.

[0043] The condensed product can th...

Embodiment 3

[0046] The β molecular sieve catalyst is installed in the rotor of the supergravity reactor to form an alkylation catalyst bed; through the continuous rotation of the rotor, the alkylation catalyst bed is driven to continue to rotate, forming a supergravity level of 400g.

[0047] Benzene and methanol are passed into the high-gravity reactor at a molar ratio of 2:1, and the alkylation reaction occurs in contact with the continuously rotating alkylation catalyst bed; wherein, the temperature of the alkylation reaction is controlled at 450°C, and the absolute pressure is 2.5MPa, and the mass space velocity is 20h -1 .

[0048] After the alkylation reaction is finished, the product is discharged from the reaction product outlet of the high-gravity reactor, and then enters the heat exchanger for condensation. After condensation, samples are collected and analyzed by gas chromatography to determine the composition of the alkylation product.

[0049] The condensed product can then ...

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Abstract

The invention provides a method of producing alkylbenzene by a high gravity reactor. The method includes: subjecting benzene and an alkylation reagent to alkylation reaction in a high gravity reactorloaded with an alkylation catalyst, and separating the alkylation reaction product to obtain alkylbenzene. The method provided by the invention can improve the selectivity and yield of the target product, effectively inhibits the carbon deposition and inactivation of the alkylation catalyst, and is beneficial to control of the alkylation reaction temperature and the stable operation of alkylationreaction.

Description

technical field [0001] The invention relates to a method for producing alkylbenzene, in particular to a method for producing alkylbenzene by using a supergravity reactor. Background technique [0002] Benzene is a chemical product with a wide range of uses, mainly from catalytic reforming, coal tar, and ethylene processes. With the vigorous development of the oil refining industry and coal coke industry, there is an excess capacity of benzene in the market, so the development of benzene is more valuable The way to use becomes imperative. Among them, the production of alkylbenzene through benzene alkylation is a way to realize the effective utilization of benzene. Alkylbenzene can be used as a raw material for increasing the production of p-xylene in aromatics complexes, which has significant economic benefits. [0003] In recent years, there has been a large excess of methanol production capacity in the domestic market, and methanol has become a relatively cheap chemical ra...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C2/88C07C15/06C07C15/08
CPCC07C2/88C07C2529/40C07C2529/70C07C2529/80C07C15/06C07C15/08Y02P20/52
Inventor 徐亚荣樊金龙冯丽梅徐新良展江宏许磊
Owner PETROCHINA CO LTD