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Selective hydrogenation catalyst for gasoline and preparation method thereof

A catalyst and selective technology, applied in chemical instruments and methods, physical/chemical process catalysts, chemical/physical processes, etc., can solve the problems of low hydrodesulfurization activity and limited inhibition of olefin saturation activity, so as to improve the selectivity , the effect of preventing alkali metal loss, high hydrodesulfurization activity and selectivity

Active Publication Date: 2011-05-11
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The catalyst adopts alumina carrier, P and K are additive components, Co and Mo are active metal components, but the acidity of the carrier also has a great influence on the selective hydrodesulfurization of the catalyst, and the alumina carrier is a weakly acidic carrier. The hydrodesulfurization activity of the catalyst supported by it is low, and the introduction of additives P and K has a limited inhibitory effect on the saturation activity of olefins. Therefore, the hydrodesulfurization selectivity of the catalyst needs to be further improved

Method used

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  • Selective hydrogenation catalyst for gasoline and preparation method thereof

Examples

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Effect test

Embodiment 1

[0028] 186g macroporous alumina dry rubber powder, 36g SB powder, 54g silica sol (SiO 2The weight content is 30%), 14g carbon black powder and 136ml water, 23ml nitric acid are mixed evenly, extruded on the extruder molding machine, place 18 hours, dry at 110 ℃ for 3 hours, then with the heating rate of 200 ℃ / hour The temperature was increased to 500° C. for 3 hours and calcined to obtain the catalyst carrier A. Weigh the weight and then place it in the rolling pot. Under the condition of rotation, spray 158ml of an aqueous solution containing 16.6g of potassium dihydrogen phosphate into the alumina carrier A in the rolling pot in an atomized manner. After the solution is sprayed, put it in the rolling pot Continue to rotate in the middle for 30 minutes, then place it for 18 hours, dry at 110°C for 3 hours, then rise to 450°C for 2 hours at a heating rate of 200°C / hour. Weigh it and place it in a rolling pan. Dissolve 21.1g of citric acid in 122ml of clean water, add 14.6g o...

Embodiment 2

[0030] 222g macroporous alumina dry rubber powder, 61g silica sol (SiO 2 The weight content is 30%), 24g carbon black powder and 136ml water, 23ml nitric acid are mixed evenly, extrude molding on the extruder molding machine, place 18 hours, dry 3 hours at 110 ℃, then with the heating rate of 200 ℃ / hour Raise the temperature to 500°C for 3 hours and calcinate the catalyst carrier B. Weigh the weight and then place it in the rolling pot. Under the condition of rotation, spray 158ml of aqueous solution containing 16.6g of potassium dihydrogen phosphate into the alumina carrier B in the rolling pot in an atomized manner. After the solution is sprayed, put it in the rolling pot Continue to rotate in the middle for 30 minutes, then place it for 18 hours, dry at 110°C for 3 hours, then rise to 450°C for 2 hours at a heating rate of 200°C / hour. Weigh it and place it in a rolling pan. Dissolve 9.6g of citric acid in 134ml of clean water, add 6.6g of cobalt carbonate, boil to dissolv...

Embodiment 3

[0032] 186g macroporous alumina dry rubber powder, 36g SB powder, 76g silica sol (SiO 2 The weight content is 30%), 23g carbon black powder and 136ml water, 23ml nitric acid are mixed evenly, extruded on the extruder molding machine, place 18 hours, dry 3 hours at 110 ℃, then with 200 ℃ / hour heating rate The temperature was increased to 500° C. for 3 hours and calcined to obtain catalyst carrier C. Weigh the weight and then place it in the rolling pot. Under the condition of rotation, spray 158ml of an aqueous solution containing 17.6g of potassium dihydrogen phosphate into the alumina carrier C in the rolling pot in an atomized manner. After the solution is sprayed, put it in the rolling pot Continue to rotate in the middle for 30 minutes, then place it for 18 hours, dry at 110°C for 3 hours, then rise to 450°C for 2 hours at a heating rate of 200°C / hour. Weigh it and place it in a rolling pan. Dissolve 26.7g of citric acid in 94ml of clean water, add 18.3g of cobalt carbon...

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Abstract

The invention discloses a selective hydrogenation catalyst for gasoline and a preparation method thereof. A carrier of the catalyst is alumina modified by carbon and silicon oxide in a specific ratio; the silicon oxide is added to regulate the acid distribution of the carrier, particularly greatly improve the L acid; and the carbon is added to inhibit the hydrogenation activity of olefin through selective interaction with an olefin hydrogenation activity center, so that the selective hydrodesulfurization capacity of the catalyst is improved, the effect of the carrier on an aid of potassium isenhanced, the carrier is coordinate with an aid of phosphorus, the loss of the potassium is prevented and the stability of the catalyst is improved. The catalyst is mainly used for selective hydrodesulfurization of the gasoline, particularly hydrodesulfurization of catalytically cracked gasoline.

Description

technical field [0001] The invention relates to a gasoline selective hydrodesulfurization catalyst and a preparation method thereof, in particular to a two-stage selective hydrodesulfurization process for catalytic cracking gasoline. 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 sul...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J27/19B01J21/18C10G45/08
Inventor 段为宇郭蓉姚运海丁莉杨成敏孙进
Owner CHINA PETROLEUM & CHEM CORP
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