A kind of green high-efficiency palladium magnetic adsorbent preparation method and application

A magnetic adsorbent, high-efficiency technology, applied in the direction of chemical instruments and methods, adsorption water/sewage treatment, process efficiency improvement, etc., can solve the problems of secondary damage to the environment, complex production process, complex preparation process, etc., and achieve adsorption efficiency High, reduce production cost, simplify the effect of production process

Active Publication Date: 2020-02-14
PEKING UNIV SHENZHEN GRADUATE SCHOOL
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  • Abstract
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  • Claims
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Problems solved by technology

Precipitation separation, ion exchange, electrolysis, etc. have complex production processes, high costs, and are difficult to implement in the actual application process; therefore, from the perspective of economy and operability, solvent extraction is currently widely used
However, the solvent extraction method in the prior art generally uses a large amount of extraction solvents or adsorbents, and these extraction solvents or adsorbents have high production costs, complicated preparation processes, and are likely to cause secondary damage to the environment during use. There are problems in terms of sex and environmental burden

Method used

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  • A kind of green high-efficiency palladium magnetic adsorbent preparation method and application
  • A kind of green high-efficiency palladium magnetic adsorbent preparation method and application

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preparation example Construction

[0030] The preparation method of the invention is divided into two parts: preparation of magnetic porous glass-ceramics and loading of organic functional groups. Firstly, the magnetic porous glass-ceramic is prepared by temperature programming method, and secondly, organic functional groups are loaded by two-step loading method, and the obtained adsorbent is a high-efficiency specific magnetic adsorbent for palladium. see figure 1 , the preparation method of the green high-efficiency palladium magnetic adsorbent of the present invention specifically comprises the following steps:

[0031] Step S101, using waste glass as the main raw material, adding a certain amount of CaCO 3 , SiC, H 3 BO 3 and iron powder, then pulverized, sieved, mixed evenly, and then programmed to heat up to obtain magnetic porous glass-ceramics.

[0032] Porous glass-ceramics is a microcrystalline material containing closed pores or connected pores obtained by heat treatment of inorganic amorphous ma...

Embodiment 1

[0050] The preparation method of the high-efficiency specific magnetic adsorbent of palladium, using waste door and window glass as raw material, comprises the following processes:

[0051] (1) Preparation of magnetic porous glass-ceramics

[0052] Magnetic porous glass-ceramic was prepared by temperature programming method. First, grind and sieve the waste glass, and weigh the waste glass, CaCO 3 , SiC, H 3 BO 3 and iron powder. After mixing evenly, put it into the muffle furnace and carry out temperature programming. Raise to 800°C at a rate of 20°C / min, hold for 30 minutes, then rise to 1133°C at a rate of 20°C / min, and hold for 10 minutes to obtain magnetic porous glass-ceramics.

[0053] (2) Loading of organic functional groups

[0054] Suspend 2g of the above-mentioned magnetic porous glass-ceramics in 70mL of dry toluene, stir for 1 hour, add 1g of 3-aminopropyltriethoxysilane under a dry nitrogen atmosphere, heat and reflux for 12 hours, filter, ethanol or dichlo...

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Abstract

The invention provides a preparation method of a green and efficient magnetic adsorbent for palladium. The preparation method comprises steps as follows: S101, waste glass serving as a main raw material is mixed with certain amounts of CaCO3, SiC, H3BO3 and iron powder, the mixture is crushed, sieved, mixed uniformly and subjected to programmed heating, and magnetic porous glass ceramics are obtained; S102, a certain quantity of the magnetic porous glass ceramics obtained in the S101 are taken and suspended in methylbenzene, 3-aminopropyltriethoxysilane is added in a dry nitrogen atmosphere, the mixture is subjected to heating reflux, filtered and dried at the room temperature, and microcrystal solids are obtained; S103, the microcrystal solids obtained in S102 are suspended in methanol, 2-mercapto benzimidazole, 2-mercaptobenzothiazole and 2-thiophenecarboxaldehyde are added, the mixture is subjected to refluxing, filtering and vacuum drying, and the magnetic adsorbent for palladium is obtained. With the adoption of the preparation method of the green and efficient magnetic adsorbent for palladium, palladium ions in sewage can be adsorbed effectively, the preparation process is simple, the production cost is low, and the adsorbent is environment-friendly.

Description

technical field [0001] The invention relates to the technical field of environmental protection, in particular to a method for preparing an efficient magnetic adsorbent with palladium as the adsorption target. Background technique [0002] Palladium has unique physical and chemical properties, and plays an increasingly important role in petrochemical, national defense research and other fields. However, its excellent physical and chemical properties are widely used in the fields of shape-selective catalysis and automotive component manufacturing. With the development of society, the demand for palladium will also increase. However, palladium resources are extremely limited, the content rate in the earth's crust is only 0.01g / t, and it is mostly symbiotic with other elements, making it difficult to refine. Palladium is mainly produced as a by-product of nickel and copper mines. The output is small and the grade is low, which cannot meet the market demand. However, with the ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J20/22B01J20/28B01J20/30C02F1/28C22B7/00C22B11/00
CPCB01J20/02B01J20/0229B01J20/043B01J20/10B01J20/22B01J20/28009C02F1/281C02F1/285C02F2101/20C22B7/001C22B11/021Y02P10/20
Inventor 陶虎春黄帅斌谷翼涵
Owner PEKING UNIV SHENZHEN GRADUATE SCHOOL
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