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Preparation method of hydrodesulfurization catalyst

A hydrodesulfurization and catalyst technology, applied in chemical instruments and methods, physical/chemical process catalysts, chemical/physical processes, etc., can solve problems such as low olefin content and octane number decline

Active Publication Date: 2020-05-15
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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  • Preparation method of hydrodesulfurization catalyst
  • Preparation method of hydrodesulfurization catalyst
  • Preparation method of hydrodesulfurization catalyst

Examples

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Effect test

Embodiment 1

[0030] 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. One stage of Catalyst A was prepared. In deionized water, add 15.9 grams of anhydrous aluminum chloride and 25.3 grams of citric acid to prepare aluminum salt and organic acid treatment aqueous solution, put a catalyst into the treatment solution, the liquid-solid volume ratio is 2:1, and the temperature is 45 ° C Conditions were treated for 10 hours, filtered, and washed 5 times with deionized...

Embodiment 2

[0032] 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. A stage of Catalyst B is produced. In deionized water, add 51.4 grams of aluminum sulfate and 22.6 grams of tartaric acid to prepare aluminum salt and organic acid treatment solution, put a catalyst B into the treatment solution, the liquid-solid volume ratio is 2.5:1, and treat at a temperature of 50 ° C 8 hours, filtered, washed 4 times with deionized water, dried at 90°C for 14 hours, and cal...

Embodiment 3

[0034] 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. A catalyst C is prepared. In deionized water, add 33.8 grams of aluminum nitrate nonahydrate and 12.5 grams of salicylic acid to prepare aluminum salt and organic acid treatment solution, put a catalyst into the treatment solution, the liquid-solid volume ratio is 1.5:1, and the temperature is 48 ℃ Treated under the same conditions for 8 hours, filtered, washed 5 times with deionized water, drie...

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Abstract

The invention discloses a preparation method of a hydrodesulfurization catalyst. The preparation method comprises the following steps: (1) loading active metals Co and Mo on a carrier by an impregnation method, and drying to obtain a primary catalyst; (2) treating the primary catalyst with a mixed aqueous solution of an aluminum salt and an organic acid, washing, drying, and roasting to prepare asecondary catalyst; (3) carrying out saturated impregnation on the secondary catalyst obtained in step (2) by using liquid olefin, and then carrying out heat treatment for carbon deposition; and (4) carrying out vulcanization treatment on the catalyst subjected to heat treatment to obtain the hydrodesulfurization catalyst. The catalyst prepared by the preparation method has high selectivity and high stability, and is suitable for a selective hydrodesulfurization reaction of oil products.

Description

technical field [0001] The invention relates to a preparation method of a hydrogenation desulfurization catalyst. 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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IPC IPC(8): B01J27/051C10G45/08
CPCB01J27/0515C10G45/08C10G2300/202B01J35/635B01J35/633B01J35/638B01J35/615Y02P20/52
Inventor 段为宇王海涛郭蓉周勇姚运海
Owner CHINA PETROLEUM & CHEM CORP
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