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Device for producing alkylated aromatic compounds

A technology for alkylating aromatic compounds, applied in the direction of hydrocarbons, hydrocarbons, carbon compound catalysts, etc., can solve the problems of limited capacity and low adsorption efficiency of adsorbents

Inactive Publication Date: 2018-04-17
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The technical problem to be solved by the present invention is the low adsorption efficiency of the adsorbent in the prior art, and the limited ability to reduce the basic nitrogen impurities in the aromatic raw material to the low content required for the liquid-phase alkylation process. Provide a new plant for the production of alkylated aromatic compounds

Method used

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  • Device for producing alkylated aromatic compounds

Examples

Experimental program
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Effect test

Embodiment 1

[0043] press figure 1 In the device, the raw material benzene has a water content of 200ppm, a total nitrogen content of 3ppm, a total sulfur content of 0.7ppm, a distillation tower operating pressure of 0.01Pa, a tower top temperature of 80°C, and a tower bottom temperature of 82°C. The adsorbent bed is filled with 100g acid clay, the adsorbent bed temperature is 82℃, the pressure is 0.5MPa, and the benzene weight space velocity is 5.0h -1 . After continuous operation for 100 hours, the total nitrogen content at the outlet of the adsorbent bed was analyzed by a sulfur and nitrogen analyzer to be 0.05 ppm, and the total sulfur content was 0.06 ppm. .

[0044] Using the purified benzene as the raw material, the alkylation of benzene and propylene is the target reaction. The reaction conditions are: fixed bed reactor, catalyst is acid Beta zeolite, reaction temperature 160℃, reaction pressure 3.0MPa, propylene weight space velocity 10.0h -1 , The molar ratio of benzene to propyle...

Embodiment 2

[0046] [Example 1] Purified benzene is used as the raw material, and the alkylation of benzene and ethylene is the target reaction. The reaction conditions are: fixed bed reactor, the catalyst is acid Beta zeolite, the reaction temperature is 205°C, and the reaction pressure is 4.5MPa. Ethylene weight space velocity 3.0h -1 , The molar ratio of benzene to ethylene is 4.0, the continuous reaction is 200 hours, and the ethylene conversion rate reaches 99%.

Embodiment 3

[0048] press figure 1 In the device, the raw material benzene has a water content of 500ppm, a total nitrogen content of 3ppm, a total sulfur content of 1.6ppm, a distillation tower operating pressure of 0.6MPa, a tower top temperature of about 140°C, and a tower bottom temperature of 160°C. The adsorbent bed is filled with 100g acid Beta zeolite, the adsorbent bed temperature is 160℃, the pressure is 2.0MPa, and the benzene weight space velocity is 3.0h -1 . After continuous operation for 100 hours, the total nitrogen content at the outlet of the adsorbent bed was analyzed by a sulfur-nitrogen analyzer to be 0.05 ppm, and the total sulfur content was 0.07 ppm.

[0049] Using the purified benzene as the raw material, the alkylation of benzene and propylene is the target reaction. The reaction conditions are: fixed bed reactor, catalyst is acid Beta zeolite, reaction temperature 160℃, reaction pressure 3.0MPa, propylene weight space velocity 10.0h -1 , The molar ratio of benzene ...

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Abstract

The invention relates to a device for producing alkylated aromatic compounds and mainly solves the problem that the capacity for reducing basic nitrogen impurities in aromatic raw materials to low content required by a liquid-phase alkylation process is still limited because of low adsorption efficiency of an adsorbent in the prior art. The problem is better solved by means of the technical schemeas follows: the device comprises a) a rectifying tower, b) an adsorption area and c) an alkylation area, wherein the rectifying tower is used for performing rectifying separation on aromatic raw materials containing polar compounds, first material flow is obtained at the tower bottom, and second material flow is obtained at the tower top; in the adsorption area, the first material flow is enabledto be contacted with the prepared adsorbent, and aromatic raw materials containing no polar compounds basically are obtained; in the alkylation area, the aromatic raw materials containing no polar compounds basically are contacted with an alkylating agent under the liquid-phase alkylation condition, and the alkylated aromatic compounds are produced accordingly. The device can be applied to industrial production of the alkylated aromatic compounds.

Description

Technical field [0001] The invention relates to a device for producing alkylated aromatic compounds. Background technique [0002] Alkylbenzene is an important organic chemical raw material, which has a wide range of applications in industry. For example, ethylbenzene is mainly used in the production of styrene, while styrene is used in the production of polystyrene and polymer materials on a large scale; Cumene is mainly used in the production of phenol and acetone; methyl cumene is used in the industrial production of methyl phenol; sec-butylbenzene is used in the production of phenol and methyl ethyl ketone. Long-chain alkylbenzene synthesized by alkylation of long-chain olefins and benzene is widely used in the manufacture of synthetic detergents. Early production of alkylbenzene mainly used AlCl 3 And HF as a catalyst, due to AlCl 3 There are serious pollution, corrosion, and safety problems with HF, and they are gradually replaced by solid acidic zeolite catalysts. However...

Claims

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Application Information

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IPC IPC(8): C07C7/00C07C15/04C07C7/04C07C7/12C07C7/13C07C2/66C07C15/46C07C15/44
CPCC07C2/66C07C7/005C07C7/04C07C7/12C07C7/13C07C2529/70C07C15/04C07C15/46C07C15/44
Inventor 高焕新魏一伦顾瑞芳方华季树芳姚晖王高伟胥明
Owner CHINA PETROLEUM & CHEM CORP
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