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Method for preparing aromatic hydrocarbons by methanol-containing raw materials

A technology of methanol and raw materials, applied in the field of aromatics preparation, which can solve the problems of difficult removal of heat, overheating of catalysts, deactivation, etc.

Inactive Publication Date: 2011-09-28
CHINA NAT OFFSHORE OIL CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Since the reaction of using methanol to prepare aromatics is a strong exothermic reaction, the heat is difficult to be taken out during the reaction. Therefore, the reaction is difficult to achieve equilibrium, which will cause the reactor to overheat and deactivate the catalyst.
In addition, there is currently no report on an industrialized device suitable for a fixed bed

Method used

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Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0015] According to the present invention, the preparation method of the metal-modified MFI structure and / or MEL structure silicoaluminite molecular sieve includes the following steps:

[0016] (1) The raw powder of zeolite molecular sieve is NH 4+ Ion exchange and roasting to prepare acidic zeolite molecular sieve;

[0017] (2) Use a soluble non-rare earth metal solution and / or a soluble rare earth metal salt solution to impregnate the acidic zeolite molecular sieve, the time of dipping and the concentration of the metal salt in the soluble non-rare earth metal salt solution and / or soluble rare earth metal salt solution as long as the catalyst is satisfied The content of the metal components is sufficient; after drying and roasting, a non-rare earth metal and / or rare earth metal modified zeolite molecular sieve is obtained;

[0018] (3) The modified catalyst prepared in step (2) is compressed into tablets, dried and shaped.

[0019] Among them, in step (1), the zeolite molecular siev...

Embodiment 1

[0024] This example is used to illustrate the preparation of fixed bed catalyst

[0025] (1) 500 grams of ZSM-5 zeolite molecular sieve powder (Nankai University Catalyst Factory) SiO 2 / Al 2 O 3 =50 (molar ratio) roasting at 550°C to remove the template, exchange 4 times with 0.5 molar equivalent of ammonium nitrate solution in a water bath at 80°C, drying in the air at 120°C, and roasting at 550°C for 3 hours to obtain HZSM-5 zeolite molecular sieve.

[0026] (2) Press the 20 grams of HZSM-5 zeolite molecular sieve prepared in step (1) into a tablet shape. After crushing and sieving to obtain a 40-60 mesh sample, divide it into two parts, and use the concentration at room temperature (25℃) Is 3% by weight and 9% by weight of zinc nitrate Zn(NO 3 ) 2 The solution is immersed for 4 hours, dried at 120°C, and calcined in air at 550°C for 6 hours to obtain a non-rare earth metal modified catalyst;

[0027] (3) La(NO) with a concentration of 10% by weight 3 ) 3 Aqueous solution impregn...

Embodiment 2

[0029] This example is used to illustrate the preparation of fixed bed catalyst

[0030] (1) 500 grams of ZSM-5 zeolite molecular sieve powder (Nankai University Catalyst Factory) SiO 2 / Al 2 O 3 =50 (molar ratio) roasting at 550°C to remove the template, exchange 4 times with 0.5 molar equivalent of ammonium nitrate solution in a water bath at 80°C, drying in the air at 120°C, and roasting at 550°C for 3 hours to obtain HZSM-5 zeolite molecular sieve.

[0031] (2) Press the 20 grams of HZSM-5 zeolite molecular sieve prepared in step (1) into a tablet shape. After crushing and sieving to obtain a 40-60 mesh sample, divide it into two parts, and use the concentration at room temperature (25℃) Is 3.7% by weight and 11.1% by weight of molybdenum nitrate Mo(NO 3 ) 3 The solution is immersed at room temperature for 4 hours, dried at 120°C, and calcined in air at 550°C for 6 hours to obtain a non-rare earth metal modified catalyst;

[0032] (3) La(NO) with a concentration of 10% by weight...

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PUM

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Abstract

A method for preparing aromatic hydrocarbons by methanol-containing raw materials. The methanol-containing raw materials comprise methanol and distilled gasoline. The method comprises that the methanol-containing raw materials and catalysts undergo a reaction under conditions of preparing aromatic hydrocarbons by methanol. The method provided by the invention solves the problems that in the prior arts, heat in a reactor is removed through an intermediate cooler and a multitubular reactor is utilized for heat removal or cold product gas is transmitted back to a raw material inlet to remove heat or a diluting material is added to control reaction heat. The method has the advantages of simple processes, and simple and convenient operation.

Description

Technical field [0001] The invention relates to a method for preparing aromatic hydrocarbons from raw materials containing methanol. Background technique [0002] Aromatics are important petrochemical products with high added value. my country’s aromatics are mainly derived from petroleum resources, and the shortage of petroleum resources in my country determines the shortage of aromatics resources. The direct conversion of resource-rich methanol to produce aromatics is of great value to alleviate the shortage of aromatics, increase the added value of methanol downstream products, and extend the industrial chain of coal chemical and natural gas chemical industries. Using methanol to produce aromatics is a new way to produce aromatics by non-petroleum routes. [0003] In 1976, Mobil Oil Company carried out the conversion of methanol to hydrocarbons on ZSM-5 molecular sieve catalyst. US4035430 discloses a process of converting methanol to gasoline on a ZSM-5 molecular sieve cataly...

Claims

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Application Information

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IPC IPC(8): C07C15/04C07C15/06C07C15/08C07C1/20
Inventor 欧书能马跃龙王建伟熊亮于广欣谭海涛金阳肖钢郑长波许磊
Owner CHINA NAT OFFSHORE OIL CORP
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