Method for removing polar compounds from aromatic raw materials containing polar compounds

A technology of polar compounds and nitrogen compounds, used in carbon compound catalysts, hydrocarbons, hydrocarbons, etc., can solve the problems of limited capacity and low adsorption efficiency of adsorbents

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

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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 i

Method used

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  • Method for removing polar compounds from aromatic raw materials containing polar compounds

Examples

Experimental program
Comparison scheme
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Example Embodiment

[0035] [Example 1]

[0036] press figure 1 The process flow of the raw material benzene is 200ppm, the total nitrogen content is 3.0ppm, the total sulfur content is 0.7ppm, the rectification tower operating pressure is 0.01Pa, the top temperature is 80℃, and the bottom temperature is 82℃. 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.

[0037] 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 propyl...

Example Embodiment

[0039] [Example 2]

[0040] press figure 1 The process flow of the raw material benzene contains 500ppm water, 3.0ppm total nitrogen, 1.6ppm total sulfur, rectification tower operating pressure 0.6MPa, tower top temperature about 140℃, and tower bottom temperature 160℃. 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.

[0041] 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 propylene is 4.0, th...

Example Embodiment

[0043] [Example 3]

[0044] press figure 1 The process flow of raw material benzene contains 300ppm water, 10ppm total nitrogen, 1.6ppm total sulfur, rectification tower operating pressure 0.6MPa, tower top temperature about 140°C, and tower bottom temperature 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 0.06 ppm, and the total sulfur content was 0.07 ppm.

[0045] 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, the catalyst is acid MCM-22 zeolite, the reaction temperature is 160°C, the reaction pressure is 3.0MPa, and the weight of propylene Airspeed 10.0h -1 , The molar ratio of benzene ...

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Abstract

The invention relates to a method for removing polar compounds from aromatic raw materials containing the polar compounds and mainly solves the problems that the adsorption efficiency of an adsorbentis low and the capability for reducing basic nitrogen impurities in the aromatic raw materials to the low content required in the liquid-phase alkylation process is still limited in the prior art. Thetechnical problems are better solved by means of the technical scheme as follows: a) the aromatic raw materials containing the polar compounds enter a rectifying column, a first material flow is obtained at the column bottom, and a second material flow is obtained at the column top; b) the material flow enters an adsorption area and makes contact with an adsorbent and the aromatic raw materials which basically do not contain the polar compounds are obtained. The method can be used for industrial production for impurity removal of the aromatic raw materials.

Description

Technical field [0001] The invention relates to a method for removing polar compounds from aromatic raw materials containing polar 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; 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, the acidic zeolite has low...

Claims

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Application Information

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IPC IPC(8): C07C7/00C07C7/04C07C7/12C07C7/13C07C15/04C07C2/66C07C15/46C07C15/44
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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