Potassium ion-containing molecular sieve desulfurizing agent, and preparation method thereof

A technology of molecular sieves and desulfurizers, which is applied in chemical instruments and methods, refined hydrocarbon oil, and other chemical processes, can solve the problems of low desulfurization efficiency, improve adsorption efficiency, reduce regeneration times, and achieve good adsorption effects

Inactive Publication Date: 2014-07-02
BEIJING SJ ENVIRONMENTAL PROTECTION & NEW MATERIAL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] The first technical problem to be solved by the present invention is that the lanthanum and cerium ion-exchange modified molecular sieves with an exchange degree as high as 70% to 95% in the prior art still have low desulfurization efficiency when desulfurizing organic sulfide molecules. problem, and further provide a potassium ion exchange modified molecular sieve with an exchange degree of 5% to 25% and a large adsorption capacity for neutral disulfides

Method used

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  • Potassium ion-containing molecular sieve desulfurizing agent, and preparation method thereof
  • Potassium ion-containing molecular sieve desulfurizing agent, and preparation method thereof

Examples

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Embodiment 1

[0031] Configure 150mL of potassium nitrate concentration as an aqueous solution of 0.08mol / L as the exchange liquid, weigh 40g of the 13X type molecular sieve powder and add it to the above exchange liquid, perform ion exchange at normal temperature for 4 hours, filter, separate, and remove the exchanged molecular sieve. Wash, dry at 70°C for 12 hours, and bake at 490°C for 2 hours to obtain sample A. After analysis, it was found that the exchange degree of potassium was 10%.

Embodiment 2

[0033] Configure 400mL of potassium nitrate concentration as the aqueous solution of 0.1mol / L as the exchange liquid, weigh 40g of the 13X type molecular sieve powder and add it to the above exchange liquid, perform ion exchange at normal temperature for 36 hours, filter, separate and remove the exchanged molecular sieve. Wash, dry at 80°C for 8 hours, and bake at 350°C for 4 hours to obtain sample B. After analysis, it was found that the exchange degree of potassium was 15%.

Embodiment 3

[0035] Configure 80 mL of an aqueous solution with a potassium nitrate concentration of 0.05 mol / L as the exchange liquid, weigh 40 g of the 13X type molecular sieve powder and add it to the above exchange liquid, conduct ion exchange at room temperature for 24 hours, filter, separate, and remove the exchanged molecular sieve. Wash, dry at 90°C for 6 hours, and bake at 350°C for 4 hours to obtain sample C. After analysis, it was found that the exchange degree of potassium was 5%.

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Abstract

The invention relates to a potassium ion-containing molecular sieve desulfurizing agent, and a preparation method thereof. According to the preparation method, metal cation K+ is used for modifying a molecular sieve, and potassium ion exchange degree is controlled to be 5 to 25%, so that electrostatic field intensity of local positions in hole passages of the molecular sieve is increased, and when the molecular sieve is used for desulphurization of hydrocarbon flow via physical adsorption, neutral sulfide and disulphide molecules in the hydrocarbon flow are polarized, and are absorbed easily, absorption capacity and absorption efficiency of the molecular sieve on the sulfides are increased. The potassium ion-containing molecular sieve desulfurizing agent with an ion exchange degree of 5 to 25% is excellent in absorption effect, is high in absorption capacity, and is capable of reducing generation times of the potassium ion-containing molecular sieve desulfurizing agent effectively.

Description

technical field [0001] The invention relates to a molecular sieve desulfurizer for removing disulfide in liquid hydrocarbons or light oil products and a preparation method thereof, belonging to the technical field of desulfurizers. Background technique [0002] Petrochemical products usually contain a certain amount of sulfides, which exist in the form of organic sulfides and inorganic sulfides. Among them, the inorganic sulfide is mainly hydrogen sulfide, and the removal of hydrogen sulfide can be carried out by using different desulfurizers and corresponding desulfurization processes; organic sulfides include mercaptans, sulfides, thiophenols, thiooxycarbons, carbon disulfide, thiophene, etc. , because the removal of organic sulfide often requires the effective conversion of organic sulfide into inorganic sulfide before it can be removed, and it cannot be directly removed by directly using desulfurizer and corresponding desulfurization process, thus increasing the organic ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/18C10G25/05
Inventor 汪祥胜吴志强李新
Owner BEIJING SJ ENVIRONMENTAL PROTECTION & NEW MATERIAL CO LTD
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