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Molecular sieve desulfurizer containing copper ion and potassium ion and preparation method thereof

A molecular sieve and desulfurizer technology, applied in the field of molecular sieve, can solve the problems of low desulfurization efficiency, and achieve the effects of improving adsorption efficiency, increasing adsorption capacity, and reducing the number of regenerations.

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

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Problems solved by technology

[0008] 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. problems, and further provide a copper and potassium ion-exchange modified molecular sieve with an exchange degree of 10% to 40% and a large adsorption capacity for organic sulfide mercaptans and sulfides with low polarity

Method used

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  • Molecular sieve desulfurizer containing copper ion and potassium ion and preparation method thereof

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Effect test

Embodiment 1

[0031] Configure 250mL exchange liquid, wherein the concentrations of potassium nitrate and copper nitrate are 0.025mol / L and 0.025mol / L respectively, weigh 40g of 13X type molecular sieve powder and add it to the above exchange liquid, ion exchange at normal temperature for 2 hours, The exchanged molecular sieves were filtered, separated, washed, dried at 70°C for 12 hours, and calcined at 500°C for 2 hours to obtain sample A. After analysis, it was found that the total exchange degree of metal copper and potassium cations was 10%.

Embodiment 2

[0033]Configure 250mL exchange liquid, wherein the concentrations of potassium nitrate and copper nitrate are 0.06mol / L and 0.04mol / L respectively, weigh 40g of 13X type molecular sieve powder and add it to the above exchange liquid, ion exchange at normal temperature for 36 hours, The exchanged molecular sieves were filtered, separated, washed, dried at 80°C for 8 hours, and calcined at 400°C for 4 hours to obtain sample B. After analysis, it was found that the total exchange degree of metal copper and potassium cations was 15%.

Embodiment 3

[0035] Configure 250mL exchange liquid, wherein the concentrations of potassium nitrate and copper nitrate are 0.1mol / L and 0.2mol / L respectively, weigh 40g of 13X type molecular sieve powder and add it to the above exchange liquid, ion exchange at normal temperature for 24 hours, The exchanged molecular sieves were filtered, separated, washed, dried at 90°C for 5 hours, and calcined at 350°C for 4 hours to obtain sample C. After analysis, it was found that the total exchange degree of metal copper and potassium cations was 25%.

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Abstract

The invention relates to a molecular sieve desulfurizer containing copper ion and potassium ion and a preparation method thereof. According to the molecular sieve desulfurizer, metal cations K+ and Cu<2+> are adopted to modify a molecular sieve, and the whole exchange rate of the potassium ion and the copper ion is 10-40%, and therefore the electrostatic field intensity of local positions in pore channels in the molecular sieve is enhanced. When hydrocarbon flows are desulfurized by the molecular sieve through physical adsorption, mercaptan molecules and thioether molecules in the hydrocarbon flows are polarized, so that the mercaptan molecules and the thioether molecules are prone to adsorption, and the adsorption capability and the adsorption efficiency of the molecular sieve for sulfides are increased. The molecular sieve desulfurizer containing the copper ion and the potassium ion, the exchange rate of which is 10-40%, is good in adsorption effect and large in adsorption capability, thus effectively reducing the number of times of regeneration of the desulfurizer.

Description

technical field [0001] The invention relates to a molecular sieve desulfurizer for removing mercaptans and sulfides in liquid hydrocarbons or light oil products and a preparation method thereof, belonging to the technical field of molecular sieves. 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 increa...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/18B01J20/30C10G25/03
Inventor 汪祥胜吴志强
Owner BEIJING SJ ENVIRONMENTAL PROTECTION & NEW MATERIAL CO LTD
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