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Heavy aromatic hydrocarbon lightening catalyst based on VIII group metal elements, preparation method and application thereof

A technology for lightening heavy aromatics and metal elements, applied in physical/chemical process catalysts, molecular sieve catalysts, chemical instruments and methods, etc., can solve problems affecting BTX yield and catalyst service life, and achieve pore volume and specific surface area Increase, excellent strength and hardness, effect of increasing strength

Pending Publication Date: 2021-01-29
NINGBO ZHONGJIN PETROCHEM CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

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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  • Heavy aromatic hydrocarbon lightening catalyst based on VIII group metal elements, preparation method and application thereof
  • Heavy aromatic hydrocarbon lightening catalyst based on VIII group metal elements, preparation method and application thereof
  • Heavy aromatic hydrocarbon lightening catalyst based on VIII group metal elements, preparation method and application thereof

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preparation example Construction

[0048] Preferably, the preparation method of the carrier includes: uniformly mixing dry aluminum hydroxide powder and modified fullerene at room temperature.

[0049] Preferably, the amount of the modified fullerene is 0.1-1.0 wt%, especially preferably 0.4-1.0 wt%, of the total mass of the carrier.

[0050] The fullerenes in the carrier are first dissolved and modified by carbon disulfide before being mixed with alumina. The dissolution temperature used for the carbon disulfide dissolution modification is 20-40° C., the pressure is 0.10-0.25 MPa, and the dissolution time is 3-40 °C. 10 minutes; the mass ratio of carbon disulfide to fullerene used in the carbon disulfide dissolution modification is 100-200:1.

[0051] Further, the fullerene is powdered C60 fullerene with a purity of ≥99.5wt%.

[0052] 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 / g...

Embodiment 1

[0099] 1.5 g of fullerene C60 powder with a purity of 99.5% was dissolved and modified with 150 g of carbon disulfide at a pressure of 0.10 MPa and 40° C. for 4 minutes to obtain a purple modified fullerene solution. Mix this modified fullerene with 250g of aluminum hydroxide dry rubber powder, and then use the prepared palladium-osmium impregnation solution with a concentration of 44.0g metal (calculated as oxide, palladium / osmium ratio 1:10) / 100mL The solution was 100ml in total, the impregnation temperature was 24°C, impregnated with aluminum hydroxide dry rubber powder mixed with modified fullerene, the impregnation time was 2.0 hours, and dried at 90°C for 6 hours, and crushed into 180 meshes to obtain the metal-containing group A mixture of modified fullerene aluminum hydroxide dry rubber powder.

[0100] Get the above-mentioned modified fullerene aluminum hydroxide dry rubber powder mixture containing metal components, Y-1 molecular sieve 85g (85% on a dry basis) and 55...

Embodiment 2

[0102] 1.60 g of fullerene C60 powder with a purity of 99.9% was dissolved and modified with 160 g of carbon disulfide at a pressure of 0.15 MPa and 30° C. for 6 minutes to obtain a purple modified fullerene solution. Mix the modified fullerene with 240g aluminum hydroxide dry rubber powder, and impregnate the prepared palladium-nickel solution with a concentration of 35.0g metal (as oxide, palladium / nickel ratio 1:10) / 100mL solution 100mL , the impregnation temperature is 22°C, the aluminum hydroxide dry rubber powder mixed with modified fullerene is impregnated, the impregnation time is 8 hours, and dried at 100°C for 5 hours, and crushed into 180 mesh to obtain the modified metal component. Permanent fullerene aluminum hydroxide dry rubber powder mixture.

[0103] Get the above-mentioned modified fullerene aluminum hydroxide dry rubber powder mixture containing metal components, Y-2 molecular sieve 65g (85% on a dry basis) and 60.0 grams of binder (30wt% on a dry basis, nit...

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Abstract

The invention relates to the field of preparation of heavy aromatic hydrocarbon lightening catalysts, and discloses a heavy aromatic hydrocarbon lightening catalyst based on VIII group metal elements,a preparation method and application thereof. The heavy aromatic hydrocarbon lightening catalyst comprises: 5-15wt% of a metal active component, wherein the metal active component comprises oxides ofVIII group metal elements; 41-70wt% of a carrier, which comprises a mixture formed by mixing modified fullerene and aluminum hydroxide dry glue powder; the modified fullerene is formed by dissolvingcarbon disulfide; and 10-25wt% of a molecular sieve; the catalyst disclosed by the invention is low in preparation cost, has the advantages of good activity and activity stability and high strength, is suitable for producing benzene compounds by selective hydrogenation of heavy aromatic hydrocarbon byproducts in a triphenyl production process, and converts polycyclic aromatic hydrocarbon into benzene compounds with reduced molecules, so that the yield of triphenyl is remarkably improved.

Description

technical field [0001] The invention relates to the field of preparation of catalysts for lightening heavy aromatics, in particular to a catalyst for lightening heavy aromatics based on Group VIII metal elements and its preparation method and application. 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 aromatics is 1-2 million tons / year. In the future, with the construction of aromatics comp...

Claims

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Application Information

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IPC IPC(8): B01J29/16B01J35/10B01J35/02C07C4/18C07C15/24C07C15/14C10G67/00
CPCB01J29/166C07C4/18C10G67/00C10G2300/1096C10G2400/30B01J35/394B01J35/50B01J35/40B01J35/617B01J35/633B01J35/615C07C15/24C07C15/14Y02P20/52
Inventor 李水荣徐保岳
Owner NINGBO ZHONGJIN PETROCHEM CO LTD
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