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A method for selective hydrodesulfurization of gasoline

A hydrodesulfurization and selective technology, applied in the treatment of hydrocarbon oil, petroleum industry, refining to remove heteroatoms, etc., can solve problems such as limited inhibition of olefin saturation activity

Active Publication Date: 2021-08-31
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The catalyst uses titania and / or zirconia-modified alumina as a carrier, P and K as additive components, and Co and Mo as active metal components. Although the selectivity of gasoline hydrodesulfurization has been improved to a certain extent, However, promoters P and K have a limited inhibitory effect on olefin saturation activity, so the hydrodesulfurization selectivity of this catalyst needs to be further improved

Method used

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  • A method for selective hydrodesulfurization of gasoline
  • A method for selective hydrodesulfurization of gasoline
  • A method for selective hydrodesulfurization of gasoline

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] 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 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 to obtain catalyst A in oxidation state. The oxidized catalyst A was vulcanized by a...

Embodiment 2

[0031]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 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 a...

Embodiment 3

[0033] Dissolve 7.7g of citric acid in 150mL of clean water, add 5.8g of cobalt carbonate, boil to dissolve, after cooling, add 25% (weight) ammonia water to 170mL, add 8.4g 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 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 by a...

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Abstract

The invention discloses a gasoline selective hydrodesulfurization method, which comprises the following contents: two catalyst beds are arranged in a fixed-bed reactor, the first catalyst bed is filled with a vulcanization type hydrodesulfurization catalyst A along the flow direction, and the second catalyst The bed is filled with sulfurized hydrodesulfurization catalyst B, and under hydrodesulfurization reaction conditions, the feedstock oil is reacted through the catalyst bed in sequence to obtain the product; based on the weight of sulfurized hydrogenation catalyst A, MoS 2 The weight content is more than 1wt% and less than 11wt%, Co 9 S 8 The weight content is 0.1wt%~7wt%; based on the weight of sulfurized hydrodesulfurization catalyst B, MoS 2 The weight content is 11%~20%, Co 9 S 8 The weight content of the catalyst is 0.1wt%~7wt%; the loading volume ratio of the first bed layer and the second bed layer catalyst is 2 / 8~8 / 2. The method can effectively improve the activity and selectivity of gasoline hydrogenation desulfurization reaction, and is suitable for industrial application.

Description

technical field [0001] The invention relates to a gasoline selective hydrodesulfurization method. 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 content is high, due t...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C10G45/08
CPCC10G45/08C10G2300/1037C10G2300/202
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