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A kind of hydrotalcite-based composite gel ball and its preparation method and application

A technology of composite gel balls and composite gels, which is applied in chemical instruments and methods, water pollutants, and other chemical processes, can solve problems such as lack of good selectivity, adsorbent biotoxicity, and difficulty in recycling, and achieve the goal of preparing Low raw material cost, high adsorption rate, cost-saving effect

Active Publication Date: 2022-08-02
NEW MATERIAL INST OF SHANDONG ACADEMY OF SCI
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  • Description
  • Claims
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Problems solved by technology

[0004] Although the powdered adsorbent has a large specific surface area and excellent adsorption performance, it has a small particle size and is not easy to fix, so that it has no good selectivity in the adsorption process and is not easy to recycle. Some adsorbents also have certain biological toxicity

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  • A kind of hydrotalcite-based composite gel ball and its preparation method and application

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preparation example Construction

[0036] In view of this, in a specific embodiment of the present invention, a preparation method of a hydrotalcite-based composite gel ball is provided, comprising the following steps:

[0037] (1) Dissolve SA in deionized water and continuously stir and disperse ultrasonically to obtain a uniform and transparent colloidal solution;

[0038] (2) adding CLDH to the solution of step (1), continuously stirring and ultrasonically dispersing, and leaving standstill for defoaming to obtain a homogeneous suspension;

[0039] (3) CaCl 2 Dissolved in deionized water to obtain a homogeneous transparent solution;

[0040] (4) The solution of step (2) is added dropwise to the solution of step (3) in a water bath at 20-60°C and continuously stirred through a peristaltic pump, and stirred for 1 to 12 hours. After the reaction is complete, stir and solidify at room temperature for 12 hours. ~48h, take out the gel ball and wash off excess Ca with deionized water 2+ , freeze-drying to obtain...

Embodiment 1

[0053] Embodiment 1: a kind of preparation method of hydrotalcite-based composite gel ball

[0054] (1) Dissolve 0.6 g of SA with a viscosity of 1000 mPa·s in 20 mL of deionized water, stir continuously and disperse ultrasonically to obtain a uniform and transparent colloidal solution of SA with a mass volume fraction of 3%;

[0055] (2) 1g CaCl 2 Dissolved in 50 mL of deionized water to obtain 2% CaCl by mass and volume 2 Homogeneous transparent solution;

[0056] (3) The solution of step (1) was added dropwise to the solution of step (2) in a 40°C water bath at a speed of 40r / min through a peristaltic pump, and the solution was continuously stirred for 2h. After the reaction was completed, at room temperature Stir and solidify for 24h in the state, take out the gel ball, wash off excess Ca with deionized water 2+ , freeze-drying to obtain hydrotalcite-based composite gel spheres 1:0% CLDH-SA gel spheres.

Embodiment 2

[0057] Embodiment 2: a kind of preparation method of hydrotalcite-based composite gel ball

[0058] (1) Dissolve 0.2 g of SA with a viscosity of 550 mPa·s in 20 mL of deionized water, stir continuously and disperse ultrasonically to obtain a uniform and transparent colloidal solution of SA with a mass volume fraction of 1%;

[0059] (2) adding 0.4g CLDH to the colloidal solution of step (1), stirring constantly and ultrasonically dispersing, leaving standstill for defoaming to obtain a homogeneous suspension;

[0060] (3) 1g CaCl 2 Dissolved in 50 mL of deionized water to obtain 2% CaCl by mass and volume 2 Homogeneous transparent solution;

[0061] (4) The solution of step (2) was added dropwise to the solution of step (3) in a 30°C water bath at a speed of 150r / min through a peristaltic pump, and the solution was continuously stirred for 2h. After the reaction was completed, at room temperature Stir and solidify for 12h in the state, take out the gel ball, wash off excess...

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Abstract

The invention provides a hydrotalcite-based composite gel ball, a preparation method and application thereof, and belongs to the technical field of adsorbent preparation and water treatment. The invention makes full use of the gel properties of sodium alginate and combines two natural materials, sodium alginate and calcined hydrotalcite, to successfully prepare a hydrotalcite-based composite gel ball adsorbent with good adsorption performance. The hydrotalcite-based composite gel ball not only makes full use of the excellent adsorption performance of hydrotalcite, but also exerts the non-toxicity, good adsorption ability and excellent molding ability of sodium alginate, which improves the adsorption effect and facilitates recovery and separation. The preparation method of the invention is simple and easy to control, the cost of preparation raw materials is low, the economy and environmental protection are economical and environmentally friendly, and therefore, the invention has a good industrial application prospect and practical application value.

Description

technical field [0001] The invention belongs to the technical field of adsorbent preparation and water treatment, and in particular relates to a hydrotalcite-based composite gel ball and a preparation method and application thereof. Background technique [0002] In recent years, the pharmaceutical intermediate industry has developed rapidly, and the problem of production wastewater treatment has also followed. The wastewater produced by this industry has many types of pollutants, complex components, difficult governance and high treatment costs. It is one of the most polluted and difficult industrial wastewaters in China. Among them, the discharge of phenols, anilines, chlorobenzenes and other toxic and harmful aromatic compounds occupies the first place in the discharge of wastewater from the chemical industry. Therefore, the treatment of pharmaceutical intermediate production wastewater is imminent. [0003] At present, the commonly used methods for the treatment of phar...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J20/24B01J20/28B01J20/30C02F1/28C02F101/38
CPCB01J20/12B01J20/24C02F1/281C02F1/286B01J20/28019B01J20/28047C02F2101/38
Inventor 单然然何媛刘秀玉朱英邵艳秋田超闫良国
Owner NEW MATERIAL INST OF SHANDONG ACADEMY OF SCI
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