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Preparation method of nano adsorbent taking soybean extract as template

A soybean extract, nano-adsorption technology, applied in chemical instruments and methods, adsorption water/sewage treatment, other chemical processes, etc., can solve the lack of safe, efficient, low-cost nano-adsorbent preparation technology, difficult to prepare hydrated metal oxide Problems such as nano-particles and high investment costs can be avoided, and the effects of preventing agglomeration, broad application prospects and low operating costs can be achieved.

Active Publication Date: 2020-01-21
BEIJING INSTITUTE OF PETROCHEMICAL TECHNOLOGY
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Problems solved by technology

Although this measure solves the problem of agglomeration and loss of hydrated metal oxide nanoparticles, its preparation cost is relatively high, and it needs to be used in an adsorption column. It needs to be equipped with a complex desorption regeneration system, and the investment cost is relatively high.
[0004] At present, in the field of hydrated metal oxide adsorbents, there is a lack of safe, efficient, and low-cost nano-adsorbent preparation technology, and it is difficult to prepare hydrated metal oxide nanoparticles that can exist stably in aqueous solutions.

Method used

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  • Preparation method of nano adsorbent taking soybean extract as template
  • Preparation method of nano adsorbent taking soybean extract as template

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preparation example Construction

[0027] Such as figure 1 Shown, a kind of preparation method taking soybean extract as the nano-adsorbent of template comprises the following steps:

[0028] Step A, crushing: crushing the soybeans into soybean powder with a particle size of less than 0.150 mm, so as to improve the efficiency of the subsequent alkali-heat leaching process.

[0029] Step B. Alkaline heat leaching: adding the soybean powder into the alkaline solution, and heating the reaction at 95-100°C for 15-25 minutes, stirring continuously during the heating process to extract the organic matter in the soybean powder, thereby obtaining soybean Alkaline hot leaching mixture.

[0030] Step C. Filtration: Filtrate the soybean alkali hot leaching mixture to remove large insoluble organic matter, and retain the filtered solution to obtain soybean extract.

[0031] Step D. Purification: The soybean extract is purified by dialysis to remove low-molecular impurities in the soybean extract, thereby obtaining purifi...

Embodiment 1

[0048] Such as figure 1 Shown, a kind of preparation method taking soybean extract as the nano-adsorbent of template comprises the following steps:

[0049] Step a, crushing: crushing soybeans meeting food safety standards into soybean powder with a particle size of less than 0.150 mm.

[0050] Step b, alkali-heat leaching: adding the soybean powder into a NaOH solution with a mass concentration of 2%, the mass ratio of the soybean powder to the NaOH solution is 1:50, and reacting by heating at 100°C for 20 minutes, heating Stir continuously during the process to extract the organic matter in the soybean powder, so as to obtain the soybean alkali hot extraction mixture.

[0051] Step c. Filtration: Filtrate the soybean alkali hot leaching mixture, the pore size retained by the filtration is not higher than 30 μm, remove insoluble large particle organic matter, and retain the filtered solution to obtain soybean extract.

[0052] Step d, purification: Purify the soybean extrac...

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Abstract

The invention discloses a preparation method of a nano adsorbent taking a soybean extract as a template. The preparation method comprises: a crushing step, namely a step of crushing soybeans into soybean powder; an alkali hot leaching step, namely a step of adding the soybean powder into an alkaline solution, and heating to react at 95-100 DEG C for 15-25 minutes to obtain a soybean alkali hot leaching mixture; a filtering step, namely a step of filtering the soybean alkali hot leaching mixture to obtain a soybean extract liquid; a purification step, namely a step of purifying the soybean extract liquid by adopting a dialysis method, so as to obtain a purified dissolved-state soybean extract; and a step of preparing the nano adsorbent, namely a step of preparing the hydrated metal oxide nano adsorbent by adopting a chemical precipitation method or an oxidation-reduction method through taking the purified dissolved soybean extract as a template agent. The preparation method is safe, efficient and low in cost, hydrated metal oxide nanoparticles stably existing in an aqueous solution system can be prepared, and the adsorption efficiency of the hydrated metal oxide nanoparticles is improved.

Description

technical field [0001] The invention relates to the field of nano-adsorbent materials, in particular to a preparation method of a nano-adsorbent using soybean extract as a template. Background technique [0002] Hydrated metal oxides such as hydrated iron oxide and hydrated manganese oxide widely exist in sediments and soils. They have the characteristics of small particle size, large specific surface area, and weak crystallization. They have amphoteric adsorption capacity and have an obvious purification effect on pollutants in the natural environment. In the field of water treatment, hydrated metal oxides have excellent adsorption properties for various types of pollutants such as arsenic, phosphorus, thallium, and cadmium, and have been developed into new adsorption materials. [0003] In the aqueous solution system, it is difficult for the hydrated metal oxide nanoparticles to exist stably, and it is easy to agglomerate, thereby reducing the adsorption capacity and adsor...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/24B01J20/30C02F1/28
CPCB01J20/24B01J20/22B01J20/08B01J20/0222C02F1/28
Inventor 胡建龙陈家庆
Owner BEIJING INSTITUTE OF PETROCHEMICAL TECHNOLOGY
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