Hydrotalcite-based composite gel ball as well as preparation method and application thereof

A composite gel and hydrotalcite-based technology, 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 raw materials Low cost, high adsorption rate, cost-saving effect

Active Publication Date: 2018-12-11
NEW MATERIAL INST OF SHANDONG ACADEMY OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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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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  • Hydrotalcite-based composite gel ball as well as preparation method and application thereof

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preparation example Construction

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

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

[0038] (2) Add CLDH to the solution of step (1), continuously stir and ultrasonically disperse, let stand for defoaming, and obtain a homogeneous suspension;

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

[0040] (4) Add the solution of step (2) dropwise to the solution of step (3) in a water bath at 20-60°C with constant stirring through a peristaltic pump, and stir 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, wash with deionized water to remove excess Ca 2+ , freeze-dried to obtain hydrotalcite-based compo...

Embodiment 1

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

[0054] (1) 0.6 g of SA with a viscosity of 1000 mpa·s was dissolved in 20 mL of deionized water, stirred continuously and ultrasonically dispersed to obtain a homogeneous and transparent colloidal solution of SA with a mass volume fraction of 3%;

[0055] (2) 1g CaCl 2 Dissolved in 50mL deionized water to obtain CaCl with a mass volume fraction of 2% 2 homogeneous transparent solution;

[0056] (3) Add the solution of step (1) dropwise to the solution of step (2) in a 40°C water bath at a speed of 5r / min through a peristaltic pump at a speed of 40r / min, and continue to stir for 2h. Stir and solidify under the state for 24h, take out the gel ball, wash away the excess Ca with deionized water 2+ , Freeze-dried to obtain hydrotalcite-based composite gel balls 1:0% CLDH-SA gel balls.

Embodiment 2

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

[0058] (1) 0.2 g of SA with a viscosity of 550 mpa·s was dissolved in 20 mL of deionized water, stirred continuously and ultrasonically dispersed to obtain a homogeneous and transparent colloidal solution of SA with a mass volume fraction of 1%;

[0059] (2) Add 0.4g CLDH to the colloidal solution of step (1), continuously stir and ultrasonically disperse, leave to stand for defoaming, and obtain a homogeneous suspension;

[0060] (3) 1g CaCl 2 Dissolved in 50mL deionized water to obtain CaCl with a mass volume fraction of 2% 2 homogeneous transparent solution;

[0061] (4) Add the solution of step (2) dropwise to the solution of step (3) in a 30°C water bath at a speed of 5r / min through a peristaltic pump at a speed of 150r / min, and continue to stir for 2h. Stir and solidify under the state for 12h, take out the gel ball, and wash away the excess Ca with deionized water 2+ , Freez...

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Abstract

The invention provides a hydrotalcite-based composite gel ball as well as a preparation method and application thereof, and belongs to the technical field of adsorbent preparation and water treatment.The hydrotalcite-based composite gel ball has the advantages that the two types of natural materials, namely sodium alginate and calcined hydrotalcite, are combined together by utilizing the gel property of sodium alginate, so as to prepare a hydrotalcite-based composite gel ball adsorbent with good adsorption property; the excellent adsorption property of hydrotalcite is utilized, and the non-toxicity property, good adsorption property and excellent forming ability of sodium alginate are realized; while the adsorption effect is improved, the recycling and separating are convenient; the preparation method is simple and is easy to control, the cost of preparation raw material is low, the economic and environment-friendly effects are realized, and the good industrialized application prospect and actual application value are realized.

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 treatment of production wastewater has also followed. The wastewater produced by this industry has many types of pollutants, complex components, difficult treatment, and high treatment costs. It is one of the most polluted and most difficult industrial wastewater 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 in the chemical industry. Therefore, the treatment of pharmaceutical intermediate production wastewater is imminent. [0003] At present, the commonly used methods for treating pharmaceutical ind...

Claims

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Application Information

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Patent Type & Authority Applications(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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