Preparation method of catalyst for producing aromatic hydrocarbon, catalyst and application thereof

A technology for catalysts and aromatics, which is used in the preparation of catalysts for the production of aromatics, catalysts and their applications, and can solve problems such as increased corrosion of equipment and low catalyst activity

Pending Publication Date: 2021-04-27
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0010] What the present invention aims to solve is that when the existing fluidized bed process produces aromatics, there are technical problems that the equipment corrosion is aggravated due to the high Cl content of the catalyst and the catalyst activity is low after dechlorination

Method used

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  • Preparation method of catalyst for producing aromatic hydrocarbon, catalyst and application thereof
  • Preparation method of catalyst for producing aromatic hydrocarbon, catalyst and application thereof
  • Preparation method of catalyst for producing aromatic hydrocarbon, catalyst and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0044] With 80 grams of ZSM-5 molecular sieves (the molar ratio of silica and alumina=200), 476.2 grams of Al sol (21wt% Al 2 o 3 ), 178 gram of kaolin and 1500 gram of water are mixed uniformly to obtain slurry, and the slurry is spray-dried to prepare microsphere SP1 with an average particle diameter of 71.5 microns, and microsphere carrier ZT1 is prepared through 550 ℃ of roasting for 4 hours, and its chlorine content is 2720ppm.

[0045] Take 189 grams of carrier ZT1, impregnate it with 140 grams of aqueous solution containing 1.62 grams of phosphoric acid, age at room temperature for 24 hours, dry at 120°C for 12 hours, and bake at 600°C for 3.5 hours to obtain the P-modified carrier PZT1.

[0046] DCL-1 was obtained after PZT1 was treated for 72 hours at 550°C, the total pressure was normal pressure, the partial pressure of ammonia was 1%, and the rest was water vapor.

[0047] Take 90 grams of carrier DCL-1, impregnate it with 90 grams of an aqueous solution containing...

Embodiment 2

[0049] Carrier DCL2 was obtained after PZT1 was treated at 700° C., total pressure 0.5 MPa, ammonia partial pressure 20%, and the rest was water vapor for 0.5 h.

[0050] Take 189 grams of carrier DCL2, impregnate with 90 grams of an aqueous solution containing 36.7 grams of zinc nitrate, age at room temperature for 24 hours, dry at 120° C. for 12 hours, and roast at 600° C. for 3.5 hours to obtain catalyst b with a chlorine content of 450 ppm.

Embodiment 3

[0052] With 100 grams of ZSM-5 molecular sieves (the molar ratio of silica and alumina=300), 93.2 grams of Al sol (21wt% Al 2 o 3 ), 152 gram of kaolin and 2200 gram of water are mixed uniformly to obtain the slurry, and the slurry is spray-dried to prepare the microsphere SP3 with an average particle diameter of 72.8 microns, and prepares the microsphere carrier ZT3 through 550 ℃ of roasting for 4 hours, and its chlorine content is 1630ppm.

[0053] Take 196 grams of carrier ZT3, impregnate it with 150 grams of aqueous solution containing 4.9 grams of phosphoric acid, age at room temperature for 24 hours, dry at 120°C for 12 hours, and then bake at 600°C for 3.5 hours to obtain the P-modified carrier PZT3.

[0054] DCL-3 was obtained after PZT3 was treated for 64 hours at 580°C, total pressure 0.15MPa, ammonia partial pressure 25%, and the rest was water vapor.

[0055] Take 99.5 grams of carrier DCL-3, impregnate it with 90 grams of an aqueous solution containing 0.73 grams...

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Abstract

The invention discloses a preparation method of a catalyst for producing aromatic hydrocarbon and the catalyst prepared by the preparation method. According to the method, the carrier loaded with the phosphorus element is subjected to steam heat treatment in the ammonia atmosphere before the metal modification component is loaded, so that not only can dechlorination be realized, but also migration of the metal modification component on the surface of the catalyst and reduction of the performance of the catalyst caused by migration can be avoided. The invention also discloses a method for producing aromatic hydrocarbon.

Description

technical field [0001] The invention relates to a method for preparing a catalyst for producing aromatic hydrocarbons, and the application of the catalyst obtained therefrom. Background technique [0002] Aromatics (in which benzene, toluene and xylene are called B, T and X respectively, and the three are collectively called BTX) are important basic organic chemical raw materials. Aromatics mainly come from catalytic reforming and steam cracking by-product pyrolysis gasoline (nearly 90%)-petroleum route, and only about 10% from coal route. From the perspective of energy distribution, my country lacks oil and gas but is rich in coal, and its dependence on foreign crude oil has exceeded 50%, which has threatened national energy security. Moreover, the depletion of petroleum resources and the long-term high volatility of petroleum prices have brought unprecedented severe challenges to energy and chemical industries based on petroleum routes. Therefore, it is imperative to deve...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J29/40B01J29/44B01J29/46B01J37/10C07C1/20C07C15/04C07C15/06C07C15/08
CPCB01J29/405B01J29/44B01J29/46B01J37/10C07C1/20B01J2229/18B01J2229/36B01J2229/38C07C2529/40C07C2529/44C07C2529/46C07C15/04C07C15/06C07C15/08Y02P20/52
Inventor 汪哲明肖景娴周健
Owner CHINA PETROLEUM & CHEM CORP
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