Anion-exchange agent prepared by using fermented straws, preparation method thereof and use thereof

An anion exchanger and ion exchanger technology, applied in the field of environment and chemistry, can solve problems such as low efficiency, high cost, and secondary pollution, and achieve the effects of high production efficiency, low cost, and less secondary pollution

Inactive Publication Date: 2010-04-28
SHANDONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] Aiming at the shortcomings of current anion exchangers prepared from crop straws such as low efficiency, serious secondary pollution in the preparation process, and high cost, the present invention provides an anion exchanger prepared by fermented straw with good stability, good adsorption effect, wide application range, and low cost. anion exchanger, and provide a preparation method of the anion exchanger, the method has high production efficiency, less secondary pollution, and can be produced on a large scale

Method used

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  • Anion-exchange agent prepared by using fermented straws, preparation method thereof and use thereof
  • Anion-exchange agent prepared by using fermented straws, preparation method thereof and use thereof
  • Anion-exchange agent prepared by using fermented straws, preparation method thereof and use thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0023] The fermented stalk is stirred and reacted with epichlorohydrin, and ethylenediamine is added, and then dimethylamine solution is added, and the batching ratio between them is fermented stalk: epichlorohydrin: ethylenediamine: triethylamine solution=10g: 10mL: 0.5mL: 10mL, the fermented straw anion exchanger was prepared. The specific preparation method is as follows:

[0024] (1) Take 10 g of fermented straw with a particle size of 200-500 μm in a 250 mL three-necked flask, add 10 mL of epichlorohydrin and stir at 85° C. for 60 minutes.

[0025] (2) Take 0.5 mL of ethylenediamine and add it to the above-mentioned 250 mL three-neck flask and continue to stir and react for 60 min, and the temperature is controlled at 85°C.

[0026] (3) Add 10 mL of dimethylamine solution with a mass percent concentration of 33%, the reaction temperature is 85° C., and the stirring time is 3 hours to obtain a solid product.

[0027] (4) The products were washed with the same volume of N...

Embodiment 2

[0029] Concrete preparation method and embodiment 1 difference are:

[0030] The amount of epichlorohydrin added in the step (1) was 1 mL, and the reaction was stirred at 20° C. for 150 minutes.

[0031] The amount of ethylenediamine added in step (2) was 5 mL, and the reaction was stirred at 20° C. for 150 minutes. .

[0032] The reactant added in step (3) is 20 mL of triethylamine with a mass percentage of 99%, the reaction temperature is 20° C., and the reaction time is 6 hours.

[0033] The obtained anion exchanger has a tan powder appearance, a Zeta potential of 10 mv, a nitrogen content of about 2.0%, and a pH value of 4.0. The product number is represented by No.2.

Embodiment 3

[0035] The difference between the preparation method and Example 1 is:

[0036] The amount of epichlorohydrin added in step (1) was 20 mL, and the reaction was stirred at 120° C. for 20 minutes.

[0037] The amide added in the step (2) was diethylenetriamine and was 10 mL, and the reaction was stirred at 120° C. for 30 minutes.

[0038] The mass percent concentration of dimethylamine added in step (3) is 69%, which is 20 mL, the reaction temperature is 120° C., and the reaction time is 0.5 hour.

[0039] The obtained anion exchanger has a brown powder appearance, a Zeta potential of 25.0 mv, a nitrogen content of about 3.3%, and a pH value of 5.2. The product number is represented by No.3.

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Abstract

The invention discloses an anion-exchange agent prepared by using fermented straws and a preparation method thereof. The anion-exchange agent is brown or red brown solid powder in appearance, the Zeta electric potential is 10 to 40mv, the nitrogen content is 2.0 to 6.0 percent and the pH value of aqueous solution of the anion-exchange agent is 4 to 6; and the anion-exchange agent is prepared by using fermented straws, epoxy chloropropane and triethylamine or dimethylamine as raw materials and using amide as a crosslinker. The preparation method prepares the anion-exchange agent by using the fermented straws, the epoxy chloropropane and the triethylamine or dimethylamine as raw materials and using the amide as the crosslinker, has the characteristics of simple production process, high production efficiency, economy and the like and is suitable to be used for large-scale production. The prepared anion-exchange agent has the advantages of secondary pollution prevention, high product stability, desirable absorption effect, wide application range, low cost, large-scale production and use and the like. The anion-exchange agent can be widely used in waste water treatment with excellent treatment effect.

Description

technical field [0001] The invention relates to an anion exchanger prepared by fermenting straw and a preparation method of the anion exchanger, which belong to the technical field of environment and chemistry. Background technique [0002] Crop straw is mainly composed of cellulose, hemicellulose and lignin, of which the cellulose content is about 30-50%. There are more hydroxyl groups on cellulose, and hydroxyl groups are active groups that can be applied to synthesis reactions such as polymerization or polycondensation, so cellulose can be widely used in the synthesis of various organic products. However, the cellulose, hemicellulose and lignin in the crop straw are closely combined and intertwined to form thick fibers with a firm structure, which can only absorb water and swell, and are not easy to participate in the synthesis reaction. [0003] To improve the utilization rate of straw, the key is to degrade lignin and retain cellulose. During the fermentation process,...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J41/08B01J41/16C02F1/42C07H15/04C07H1/00C08L1/08C08L5/14C08L97/00B01J41/09B01J41/13
Inventor 高宝玉许醒岳钦艳王文懿钟倩倩
Owner SHANDONG UNIV
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