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Method for continuously producing sodium alginate microspheres capable of efficiently removing heavy metals

A sodium alginate and heavy metal technology, applied in chemical instruments and methods, and other chemical processes, can solve the problems of fragile microspheres, low strength of microspheres, and low adsorption capacity of heavy metals, and achieve good adsorption effect and excellent morphology. Controllable and uniform particle size effect

Inactive Publication Date: 2021-01-22
HUBEI FORBON TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Aiming at the problems of the existing technology that the microspheres are not high in strength, they are easily broken after the hot pressing process and the adsorption capacity of heavy metals in the microspheres is low.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] (1) First, 500kg of high specific surface and highly active iron, manganese and sulfur micron-scale porous materials prepared according to the above method are added to 1500kg of a 20% sodium alginate aqueous solution, fully stirred, and mixed solution A is obtained. ;

[0031] (2) The mixed solution A prepared in step (1) is continuously added to 2000L of 2.5% calcium chloride aqueous solution by spraying in a spray mode, stirred and reacted for 20min, and sodium alginate microspheres are obtained after iron, manganese and sulfur modification, and produced 5% calcium chloride aqueous solution by initial weight of calcium chloride aqueous solution per hour during the process;

[0032] (3) The iron-manganese-sulfur-modified sodium alginate microspheres prepared in (2) were filtered and washed at least three times with deionized water to obtain sodium alginate microspheres with high efficiency for removing heavy metals.

[0033] Sodium alginate microspheres with high eff...

Embodiment 2

[0035] (1) First, 550kg of high specific surface and high activity iron, manganese and sulfur micron-scale porous materials prepared according to the above method are added to 1450kg of a mass concentration of 10% sodium alginate aqueous solution, fully stirred, and mixed solution A is obtained. ;

[0036] (2) The mixed solution A prepared in step (1) was continuously added to 2000L of 2.5% calcium chloride aqueous solution by spraying in a spray mode, stirred and reacted for 25min to obtain sodium alginate microspheres modified by iron, manganese and sulfur, 5% calcium chloride aqueous solution by initial weight of calcium chloride aqueous solution per hour during the production process;

[0037] (3) The iron-manganese-sulfur-modified sodium alginate microspheres prepared in (2) were filtered and washed at least three times with deionized water to obtain sodium alginate microspheres with high efficiency for removing heavy metals.

[0038] Sodium alginate microspheres with hi...

Embodiment 3

[0040] (1) First, 150 kg of high specific surface area and highly active iron-manganese-sulfur micron-scale porous material prepared according to the above method are added to 1000 kg of a 5% sodium alginate aqueous solution, fully stirred, and mixed solution A is obtained. ;

[0041] (2) The mixed solution A prepared in step (1) is continuously added to 2000L of 2% calcium chloride aqueous solution by spraying in a spray mode, stirred and reacted for 30min to obtain sodium alginate microspheres modified by iron, manganese and sulfur, and produced 10% calcium chloride aqueous solution by initial weight of calcium chloride aqueous solution per hour during the process;

[0042] (3) The iron-manganese-sulfur-modified sodium alginate microspheres prepared in (2) were filtered and washed at least three times with deionized water to obtain sodium alginate microspheres with high efficiency for removing heavy metals.

[0043] Sodium alginate microspheres with high efficiency for remo...

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Abstract

The invention relates to a method for continuously producing sodium alginate microspheres capable of efficiently removing heavy metals. The method comprises the following steps of: (1) firstly, addingan iron-manganese-sulfur micron-sized porous material with high specific surface area and high activity into a sodium alginate water solution, and performing sufficient and uniform stirring to obtaina mixed solution A; (2) continuously adding the mixed solution A prepared in the step (1) into a calcium chloride aqueous solution in a spraying manner, and performing stirring to react for 20-30 minutes to prepare iron-manganese-sulfur modified sodium alginate microspheres; and (3) filtering the iron-manganese-sulfur modified sodium alginate microspheres prepared in the step (2), and performingwashing with deionized water for at least three times to obtain the sodium alginate microspheres capable of efficiently removing heavy metals. The sodium alginate microspheres prepared by the method are controllable in morphology, uniform in particle size, high in particle strength and good in heavy metal adsorption effect. And the process flow of the sodium alginate microspheres prepared by the method is simple and controllable, the yield of the sodium alginate microspheres is high, large-scale mass production of thesodium alginate microspheres can be realized, and the sodium alginate microspheres has a bright market prospect.

Description

technical field [0001] The invention relates to a method for continuously producing sodium alginate microspheres with high efficiency for removing heavy metals, which is suitable for large-scale production and belongs to the technical field of microsphere preparation. Background technique [0002] At present, the research hotspots of biomass adsorption materials mainly use sodium alginate as the raw material, and the sodium alginate as the raw material adsorbent is mostly in the form of powder or hydrogel. Because the particles of powdered sodium alginate are too fine, it is difficult to recover after adsorption treatment, resulting in blockage of the device. Due to factors such as large size and uncontrollable shape of hydrogel-like sodium alginate prepared by traditional technology, its specific surface area is small and its adsorption capacity is relatively low. [0003] The prior art patent CN106139235A describes a method for preparing sodium alginate microspheres with ...

Claims

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Application Information

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IPC IPC(8): B01J20/24B01J20/30
CPCB01J20/24B01J20/0229B01J20/0266B01J20/0222
Inventor 王仁宗汪志操素芬
Owner HUBEI FORBON TECH
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