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Fuel oil desulfuration membrane absorbing material and preparation method thereof

An inorganic adsorbent and formulation technology, applied in chemical instruments and methods, refined hydrocarbon oil, petroleum industry, etc., can solve the problems of adsorption function limitation, frequent cycle regeneration, low sulfur capacity of adsorbent, etc., to achieve simple method and source of raw materials The effect of wide and fast process speed

Inactive Publication Date: 2011-10-05
TIANJIN POLYTECHNIC UNIV
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AI Technical Summary

Problems solved by technology

Although traditional hydrodesulfurization can effectively remove sulfides that are difficult to remove such as thiophenes, it generally has the following disadvantages: (1) RON is reduced by 7 to 10 units; (2) MON is reduced by 3 to 4 units (3) Olefin addition reaction takes place, which consumes a large amount of hydrogen; in addition, the equipment investment and operating costs of this process are very expensive, and domestic refineries generally lack hydrogenation devices, so it is difficult to be widely used in deep desulfurization. Therefore, other low-cost fuel oil deep desulfurization technologies are urgently needed [An Gaojun, Zhou Tongna, Chai Yongming, Progress in Chemistry, 2007, 19(9): 1331~1344]
The disadvantages of the IRVAD adsorption process are: the adsorbent has a low sulfur capacity, requires frequent regeneration, and has a short service life, and needs to be regularly replenished with fresh adsorbents [Gu Tao, Mu Xuhong, Chen Xibo, Progress in Chemical Industry, 2005, 24 (1): 90~95]
In this case, the adsorbent particles are larger, which reduces the specific surface area and limits the adsorption function [Zhao Xueling, Zhang Yuzhong, Li Hong, Journal of Tianjin University of Technology, 2008, 27(2): 11~15]

Method used

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  • Fuel oil desulfuration membrane absorbing material and preparation method thereof
  • Fuel oil desulfuration membrane absorbing material and preparation method thereof
  • Fuel oil desulfuration membrane absorbing material and preparation method thereof

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preparation example Construction

[0030] The present invention has designed the preparation method of described MMMs membrane simultaneously, and it comprises the steps:

[0031] 1. Preparation of casting solution: According to the mass percentage requirements of the hybrid film formula of the present invention, fully mix the various components described, stir at 20-80°C for 4-12 hours, and stand at room temperature for defoaming After 24 to 48 hours, a uniformly mixed casting solution is obtained;

[0032] 2. Membrane making: at 20-90°C, scrape-coat the obtained casting solution on a flat plate or non-woven fabric to form a flat film, and then soak it in a coagulation bath with a temperature of 20-90°C for 48-48°C. 72 hours, so that the film is solidified and formed completely, and the residual solvent and additives are removed, so that the MMMs film with adsorption function can be prepared. The flat plate includes a flat glass plate and a stainless steel plate; the scraping method can be manually scraped wi...

Embodiment 1

[0042] Separation membrane preparation process: first add CeY molecular sieve into N-methylpyrrolidone solvent and stir, after the dispersion is complete, add PEG-400 and PVP, after the solid is completely dissolved, add polyimide polymer three times, at 50 ° C Stir for 8 hours, wherein the polymer content is 14% (Wt%), the molecular sieve content is 9.4% (Wt%), the PEG-400 content is 18% (Wt%), and the PVP content is 3% (Wt%); to be dispersed After completion, let it stand for 24 hours for defoaming to prepare a casting solution; scrape the casting solution on a glass plate to form a flat film, and solidify it in a water coagulation bath; then soak the obtained flat film with ethanol for 24 hours, After draining, bake at 200°C for 3 hours to obtain the MMMs film of the present invention. The resulting membrane has a well-developed pore structure, and the inorganic adsorbent particles are embedded in the three-dimensional network pore structure (see Figure 2-4 ).

[0043] A...

Embodiment 2

[0047] Separation membrane preparation process: first add AgY molecular sieve into N-methylpyrrolidone solvent and stir, after the dispersion is complete, add PEG-400 and PVP, and after the solid is completely dissolved, add polyimide polymer three times, at 50 ℃ Stir for 8 hours, wherein the polymer content is 14% (Wt%), the molecular sieve content is 9.4% (Wt%), the PEG-400 content is 18% (Wt%), and the PVP content is 3% (Wt%); to be dispersed After completion, let it stand for 24 hours for defoaming to prepare a casting solution; scrape the casting solution on a glass plate to form a flat film, and solidify it in a water coagulation bath; then soak the obtained flat film with ethanol for 24 hours, After draining, bake at 200°C for 3 hours to obtain the MMMs film of the present invention.

[0048] Among them, the AgY adsorbent is prepared by ion exchange method: NaY and 0.15mol / L silver nitrate aqueous solution are stirred and exchanged at 20°C for 5 hours, and after the exc...

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Abstract

The invention relates to a preparation method of a fuel oil desulfuration membrane absorbing material belonging to a preparation technology and an application direction of membrane absorbing materials, in particular to a Mixed Matrix Membranes (MMMs) absorbing functional membrane with a three-dimensional net structure, prepared by using a high polymer as a matrix material and porous inorganic particles as a functional body and adopting a control phase transformation membrane preparation process. A fuel oil desulfuration membrane comprises the following components in percent by mass: 10-25 percent of polymer, 5-40 percent of inorganic absorbing agent particles, 30-80 percent of solvent and 5-30 percent of additive, wherein the sum of the contents of the components is 100 percent. According to the formula in the invention, the preparation method of the fuel oil desulfuration membrane comprises the following steps of: 1, preparing a casting film solution; 2, preparing the membrane; and 3, posttreating. The prepared absorbing functional membrane can be used for desulfuration of fuel oil, especially for removal of sulfide in gasoline and diesel, and has an absorbing capacity of more than 7.5mgS / g for the fuel oil with sulfur content of 500mug / g.

Description

technical field [0001] The invention belongs to the preparation technology and application direction of membrane adsorption materials, and relates to a method for manufacturing MMMs adsorption functional membranes for fuel oil desulfurization. Specifically, the polymer is used as the matrix material, the porous inorganic particles are used as the functional body, and an appropriate membrane preparation process is selected to prepare an adsorption functional membrane with a three-dimensional network structure, temperature resistance, and solvent resistance. The prepared adsorption function membrane can be used for desulfurization of fuel oil, especially the removal of sulfide in gasoline and diesel oil. Background technique [0002] With the world's increasing emphasis on environmental protection and stricter environmental regulations, the production of low-sulfur and ultra-low-sulfur fuel oil is gradually attracting people's attention. In recent years, the sulfur content of...

Claims

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Application Information

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IPC IPC(8): B01J20/26B01J20/30C10G25/00C08L79/08C08L81/06C08L27/16C08J7/02C08J5/18
Inventor 林立刚张玉忠
Owner TIANJIN POLYTECHNIC UNIV
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