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Processing method for lightening heavy aromatics and heavy aromatics selective hydrogenation catalyst

A technology for lightening and hydrogenation catalysts for heavy aromatics, which is applied in the direction of organic compound/hydride/coordination complex catalysts, physical/chemical process catalysts, chemical instruments and methods, etc., and can solve the problems affecting BTX yield and catalyst use Life and other issues, to achieve the effect of increased pore volume and specific surface area, excellent strength and hardness, and reduced production costs

Active Publication Date: 2021-02-02
NINGBO INST OF MATERIALS TECH & ENG CHINESE ACADEMY OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The particle size of this large-pore nano-beta molecular sieve is about 50-100nm, and the particle size is a bit too large. It may cause two or more aromatics to reach the acid center through the pores at the same time due to the large pores, causing polymerization to form coke and affecting BTX. Productivity and Catalyst Lifetime

Method used

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  • Processing method for lightening heavy aromatics and heavy aromatics selective hydrogenation catalyst
  • Processing method for lightening heavy aromatics and heavy aromatics selective hydrogenation catalyst
  • Processing method for lightening heavy aromatics and heavy aromatics selective hydrogenation catalyst

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preparation example Construction

[0045] Further, the preparation method of the carrier includes: uniformly mixing dry aluminum hydroxide powder and modified fullerene at room temperature.

[0046] Further, the amount of the modified fullerene is 0.1-1.0 wt%, especially preferably 0.5-1.0 wt%, of the total mass of the carrier.

[0047] Further, before the fullerene in the carrier is mixed with alumina, it is first dissolved and modified by carbon disulfide, and the dissolution temperature used for the dissolution and modification of carbon disulfide is 20-40°C, the pressure is 0.10-0.25MPa, and the dissolution time is 3-10 minutes; the mass ratio of carbon disulfide to fullerene used in the carbon disulfide dissolution modification is 100-200:1.

[0048] Further, the fullerene is powdered C60 fullerene with a purity of ≥99.5wt%.

[0049] In some embodiments, in the catalyst of the present invention, the dry aluminum hydroxide powder has a pore volume of 0.7-1.1ml / g and a specific surface area of ​​250-500m 2...

Embodiment 1

[0100] 1.3 g of fullerene C60 powder with a purity of 99.9% was dissolved and modified with 130 g of carbon disulfide at a pressure of 0.15 MPa and 40° C. for 3 minutes to obtain a purple modified fullerene solution. Mix this modified fullerene with 230g aluminum hydroxide dry rubber powder, and then use the prepared tungsten-cobalt impregnation solution with a concentration of 25.0g metal (calculated as oxide, tungsten / cobalt ratio 3:1) / 100mL The solution was 200ml in total, the impregnation temperature was 20°C, the aluminum hydroxide dry rubber powder mixed with modified fullerene was impregnated, the impregnation time was 12.0 hours, and the ratio of the impregnation solution to the carrier in the impregnation treatment was 8mL: 1g. The stirring rate was 20 rpm, the stirring time was 5 hours, and dried at 150° C. for 7 hours, and crushed into 180 meshes to obtain a modified fullerene aluminum hydroxide dry rubber powder mixture containing metal components.

[0101] Get the...

Embodiment 2

[0103] 1.5 g of fullerene C60 powder with a purity of 99.9% was dissolved and modified with 150 g of carbon disulfide at a pressure of 0.25 MPa and 20° C. for 6 minutes to obtain a purple modified fullerene solution. Mix this modified fullerene with 240g aluminum hydroxide dry rubber powder, and use the prepared molybdenum-nickel impregnation solution with a concentration of 35.0g metal (calculated as oxide, molybdenum / nickel ratio 3:1) / 100mL solution 200mL , the impregnation temperature is 24°C, the impregnation is mixed with modified fullerene aluminum hydroxide dry rubber powder, the impregnation time is 2 hours, the ratio of the impregnation solution to the carrier in the impregnation treatment is 5mL: 1g, the stirring speed 60 rpm, stirring for 2 hours, dried at 80°C for 10 hours, and crushed into 100 meshes to obtain a modified fullerene aluminum hydroxide dry rubber powder mixture containing metal components.

[0104] Get the above-mentioned modified fullerene aluminum ...

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Abstract

The invention discloses a processing method for lightening heavy aromatics and a heavy aromatics selective hydrogenation catalyst. The processing method for lightening the heavy aromatics comprises the following steps: contacting a component containing the heavy aromatics with a heavy aromatics selective hydrogenation catalyst, and carrying out hydrogenation saturation and cracking reaction of theheavy aromatics to realize lightening of the heavy aromatics, wherein the heavy aromatic hydrocarbon selective hydrogenation catalyst comprises a metal active component, a carrier loaded with the metal active component and a molecular sieve used as a lightening component, the carrier is mainly formed by mixing modified fullerene and aluminum hydroxide dry glue powder, and the metal active component comprises a metal oxide; the specific surface area of the heavy aromatic hydrocarbon selective hydrogenation catalyst is 260-600m < 2 > / g, and the pore volume is 0.20-0.40 ml / g. The catalyst has the advantages of good activity and activity stability and high strength, and is suitable for producing naphthalene and benzene compounds by selective hydrogenation of heavy aromatic hydrocarbon byproducts in a triphenyl production process.

Description

technical field [0001] The invention relates to the field of preparation of heavy aromatics selective hydrogenation catalysts, in particular to a heavy aromatics selective hydrogenation catalyst suitable for treating raw materials containing heavy aromatics, a preparation method thereof, and a processing method for lightening heavy aromatics. Background technique [0002] Heavy aromatics mainly come from catalytic reforming and ethylene cracking units. Reform C 9 + Heavy aromatics account for about 15% to 20% of the processing capacity of reforming units. The domestic reforming processing capacity has exceeded 100 million tons per year. Reforming C 9 + The production capacity of heavy aromatics is 15-20 million tons / year. cleavage C 9 + Heavy aromatics account for 10% to 20% of the production capacity of ethylene units. Domestic ethylene cracking units have a production capacity of more than 20 million tons per year. Cracking C 9 + The production capacity of heavy ar...

Claims

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Application Information

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IPC IPC(8): B01J31/34B01J35/10C10G49/08
CPCB01J31/34C10G49/08C10G2300/1096B01J35/617B01J35/615B01J35/633Y02P20/52
Inventor 许杰尹宏峰
Owner NINGBO INST OF MATERIALS TECH & ENG CHINESE ACADEMY OF SCI
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