A method, product and application for preparing composite adsorbent by utilizing chlorosilane raffinate and chitosan

A chlorosilane residual liquid, composite adsorption technology, applied in silicon compounds, chemical instruments and methods, adsorption water/sewage treatment, etc. It can achieve the effect of excellent hydrophobicity, excellent adsorption performance and hydrophobicity, and prevent agglomeration

Inactive Publication Date: 2019-09-24
四川广阳环保科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the silicon dioxide generated in this process is difficult to use due to its irregular shape and large particles, and it is generally treated as waste in landfill.
Moreover, the silica exchange capacity is small, the lattice defects in the skeleton are few, and it does not have redox property itself, which also limits its application in the field of wastewater adsorption treatment.

Method used

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  • A method, product and application for preparing composite adsorbent by utilizing chlorosilane raffinate and chitosan
  • A method, product and application for preparing composite adsorbent by utilizing chlorosilane raffinate and chitosan
  • A method, product and application for preparing composite adsorbent by utilizing chlorosilane raffinate and chitosan

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] This embodiment provides a method for preparing a modified silica adsorbent, which specifically includes the following steps:

[0033] Prepare 100ml of 0.08% surfactant aqueous solution in a 1000ml four-necked flask with deionized water and Tween 20; then alternately add 30ml of chlorosilane residue to the four-necked flask containing the surfactant solution And 80g calcium carbonate powder, control the alternate addition speed, so that the pH of the reaction mixture in the four-neck flask is controlled between 0.5-3, and the reaction temperature is controlled to 40-50 ℃, and react for 3 hours under stirring conditions. After the addition is complete, add 2g of chitosan and 15ml of glutaraldehyde, heated to 50°C and continued to stir and react for 2h, and then kept at 60°C for 3h. After the precipitation in the reaction mixture is complete, the reaction in the four-necked flask The mixture is filtered, and the filtered cake is repeatedly washed with deionized water until t...

Embodiment 2

[0035] This embodiment provides a method for preparing a composite adsorbent using chlorosilane residual liquid and chitosan, which specifically includes the following steps:

[0036] First prepare 100ml of 0.09% surfactant aqueous solution with deionized water and Tween 80 in a 1000ml four-necked flask; then alternately add 30ml of chlorosilane residue to the four-necked flask containing the surfactant solution And 80g calcium carbonate powder, control the alternate addition speed, so that the pH of the reaction mixture in the four-neck flask is controlled between 0.1-3, and the reaction temperature is controlled to 40-50℃, and react for 4h under stirring conditions. After the addition is complete, add 2g of chitosan and 20ml of glutaraldehyde, heated to 60°C and continued to stir and react for 3h, then kept at 60°C for 3h, and after the precipitation in the reaction mixture is complete, the reaction in the four-necked flask The mixture is filtered, and the filtered cake is repe...

Embodiment 3

[0038] This embodiment provides a method for preparing a composite adsorbent using chlorosilane residual liquid and chitosan, which specifically includes the following steps:

[0039] Firstly, in a 1000ml four-necked flask, use deionized water and sodium dodecylbenzene sulfonate surfactant (SDBS) to prepare 100ml of a 0.1% surfactant aqueous solution; then to the four-necked flask containing the surfactant solution In the flask, alternately add 30ml of chlorosilane residue and 80g of calcium carbonate powder, and control the alternate addition speed so that the pH of the reaction mixture in the four-neck flask is controlled between 1.5-2.5, and the reaction temperature is controlled to 40-50°C, stirring React for 5h under the conditions. After the dripping is completed, add 3g chitosan and 20ml glutaraldehyde, increase the temperature to 70℃ and continue to stir the reaction for 4h, and then keep it at 60℃ for 3h, and wait until the precipitation in the reaction mixture is complet...

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Abstract

The invention discloses a method for preparing a composite adsorbent from chlorosilane raffinate and chitosan. The preparation method is characterized in that hydrochloric acid and silicic acid whichare generated by the hydrolysis of chlorosilane are directly used, a certain amount of hydrochloric acid is separated out, chitosan and glutaraldehyde are added, and composite modification is carriedout to prepare the silica-chitosan composite adsorbent having a hydrophobic function. The whole treatment process of the method is simple and is friendly to the environment, and the prepared compositeadsorbent product can be widely applied to the field of industrial wastewater purifying treatment, and has high practical values, so the low-cost and high-value recycling of the chlorosilane raffinate is achieved.

Description

Technical field [0001] The invention relates to the field of preparation of a variety of new environmental materials and the recycling of industrial waste water, in particular to a method, product and application for preparing a composite adsorbent using chlorosilane residual liquid and chitosan produced in the production process of photovoltaic cells. Background technique [0002] With the large-scale development and utilization of green energy solar energy, the use of polycrystalline silicon as a raw material for photovoltaic cells has become more and more extensive, and the total output of polycrystalline silicon in China has increased year by year. However, the safety and environmental protection problems of the by-product chlorosilane residue of polycrystalline silicon production have become increasingly prominent. At present, most of the domestic polysilicon production processes will produce a large amount of by-products during the reaction process. For every 1t of polysilic...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J20/22B01J20/10B01J20/28B01J20/30C02F1/28C02F101/32
Inventor 王应红苏泽模
Owner 四川广阳环保科技有限公司
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