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Hydrodesulfurization catalyst and preparation method thereof

A hydrodesulfurization and catalyst technology, which is applied in catalyst activation/preparation, chemical instruments and methods, physical/chemical process catalysts, etc., can solve the problems of low olefin content and decreased octane number, etc.

Active Publication Date: 2020-05-08
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] As we all know, the sulfur content of straight-run gasoline is mainly related to the sulfur content of crude oil. No significant octane loss
However, FCC gasoline has high sulfur and olefin content. Although the traditional HDS method can effectively remove the sulfur-containing compounds, the olefins with a low degree of branching in FCC gasoline are easily hydrogenated and saturated to form low-octane. Therefore, with the traditional HDS method, as the sulfur content of FCC gasoline decreases, it must be accompanied by a sharp decline in the octane number

Method used

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  • Hydrodesulfurization catalyst and preparation method thereof
  • Hydrodesulfurization catalyst and preparation method thereof
  • Hydrodesulfurization catalyst and preparation method thereof

Examples

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Effect test

Embodiment 1

[0029] Dissolve 20.9g of citric acid in 120mL of clean water, add 15.5g of cobalt carbonate, boil to dissolve, after cooling, add 25% (weight) ammonia water to 170mL, add 29.5g of ammonium molybdate to the above solution, dissolve and use 25 % ammonia water to adjust the volume of the solution to 200mL, and keep it airtight. Put 200 g of the carrier in a rolling pot, spray and immerse it with 150 mL of molybdenum and cobalt ammonium solution, after the solution is sprayed, continue to rotate in the rolling pot for 30 minutes, then place it for 18 hours, and dry it at 110°C for 3 hours. Then, the temperature was increased to 500° C. for 3 hours at a heating rate of 200° C. / hour to obtain a semi-finished catalyst A. The semi-finished catalyst A was immersed in 600mL hexadiene solvent for 4h, then heated at 200°C for 4h, heated to 300°C for 24h, and then heated to 400°C for 10h for heat treatment; the oxidation state catalyst A was obtained. The oxidized catalyst A was vulcanize...

Embodiment 2

[0031] Dissolve 11.1g of citric acid in 125mL of clean water, add 8.2g of cobalt carbonate, boil to dissolve, after cooling, add 25% (weight) ammonia water to 170mL, add 14.5g of ammonium molybdate to the above solution, dissolve and use 25 % ammonia water to adjust the volume of the solution to 200mL, and keep it airtight. Put 200 g of the carrier in a rolling pot, spray and immerse it with 150 mL of molybdenum and cobalt ammonium solution, after the solution is sprayed, continue to rotate in the rolling pot for 30 minutes, then place it for 18 hours, and dry it at 110°C for 3 hours. Then, the temperature was raised to 500° C. for 3 hours at a heating rate of 200° C. / hour to obtain a semi-finished catalyst B. The semi-finished catalyst B was immersed in 600mL of hexadiene solvent for 4h, then heated at 200°C for 4h, heated to 300°C for 24h, and then heated to 400°C for 10h for heat treatment; to obtain catalyst B in oxidation state. The oxidized catalyst B was vulcanized by ...

Embodiment 3

[0033]Dissolve 28.1g of citric acid in 90mL of clean water, add 20.9g of cobalt carbonate, boil to dissolve, after cooling, add 25% (weight) ammonia water to 170mL, add 45.6g of ammonium molybdate to the above solution, dissolve and use 25 % ammonia water to adjust the volume of the solution to 200mL, and keep it airtight. Put 200 g of the carrier in a rolling pot, spray and immerse it with 150 mL of molybdenum and cobalt ammonium solution, after the solution is sprayed, continue to rotate in the rolling pot for 30 minutes, then place it for 18 hours, and dry it at 110°C for 3 hours. Then, the temperature was raised to 500° C. and calcined for 3 hours at a rate of 200° C. / hour to obtain a semi-finished catalyst C. The semi-finished catalyst C was immersed in 600mL of hexadiene solvent for 4h, then heated at 200°C for 4h, heated to 300°C for 24h, and then heated to 400°C for 10h for heat treatment; to obtain catalyst C in oxidation state. The oxidized catalyst C was vulcanized...

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Abstract

The invention discloses a hydrodesulfurization catalyst and a preparation method thereof. The catalyst comprises sulfides of hydrogenation active metal components Co and Mo, carbon and a carrier, based on the total weight of the catalyst, the sulfide content of Mo is 1.0-20.0%, the sulfide content of Co is 0.1-7.0%, the carbon content is 0.5-18.0%, the carrier is an inorganic refractory oxide, andthe content of the inorganic refractory oxide is 55-98%, the average lamellar crystal length of the active phase MoS2 is 4-14 nm, the average lamellar crystal layer number in a single stack layer is5.5-12, and the proportion of the stack layers with the layer number of larger than 5 is 15-30% based on the total number of the stack layers. The preparation method of the hydrodesulfurization catalyst comprises the following steps: (1) loading active metals Co and Mo on a carrier, drying, and roasting to obtain a semi-finished catalyst; (2) carrying out saturated impregnation on the semi-finished catalyst by using liquid-state olefin, and then carrying out heat treatment; and (3) carrying out vulcanization treatment on the catalyst subjected to heat treatment to obtain the catalyst. The catalyst has high selectivity and high-stability gasoline selectivity in the selective hydrogenation process of gasoline.

Description

technical field [0001] The invention relates to a hydrodesulfurization catalyst and a preparation method thereof. Background technique [0002] In recent years, in order to protect the environment, governments around the world have made great efforts to reduce the emission of harmful substances in the exhaust of internal combustion engines. The quality specifications of motor fuels have become increasingly stringent, especially requiring the reduction of sulfur content in motor gasoline. Combustion product SO of sulfur compounds in gasoline X It is one of the main harmful substances of automobile exhaust, and also one of the catalyst poisons of automobile exhaust conversion devices. Therefore, countries around the world have enacted legislation to impose stricter and stricter restrictions on the sulfur content in gasoline. [0003] As we all know, the sulfur content of straight-run gasoline is mainly related to the sulfur content of crude oil. Even though the sulfur conten...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J27/051B01J37/02B01J37/08B01J37/20C10G45/08
CPCB01J27/0515B01J37/0201B01J37/084B01J37/20C10G45/08C10G2300/202C10G2400/02Y02P20/52
Inventor 段为宇郭蓉周勇姚运海丁莉杨成敏孙进刘丽
Owner CHINA PETROLEUM & CHEM CORP
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