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Process for preparing water purifying adsorbent polycyclodextrin

A technology for polycyclodextrin and water purification, applied in chemical instruments and methods, and other chemical processes, can solve the problems of weak interaction between natural cyclodextrin and organic molecules, and achieve easy regeneration, good film-forming properties, and high adsorption The effect of capacity

Inactive Publication Date: 2002-06-05
TIANJIN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] However, due to the water solubility of cyclodextrin, it generally cannot be directly used as an adsorbent in water
In addition, the interaction between natural cyclodextrin and organic molecules is generally relatively weak (the inclusion constant is generally between 10-1000), which limits its application

Method used

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  • Process for preparing water purifying adsorbent polycyclodextrin
  • Process for preparing water purifying adsorbent polycyclodextrin
  • Process for preparing water purifying adsorbent polycyclodextrin

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] Example 1 Preparation of polycyclodextrin 1

[0017] Add 4.4mmol β-CD and 35mmol isocyanate into 50ml dimethyl sulfoxide, and react under electromagnetic stirring at 70°C, and the reaction time is 3 to 10 hours. After the reaction, the reaction system was washed with acetone, and the obtained reaction solid was washed with boiling water and hot ethanol in turn, and then dried in a vacuum oven at 40° C. for 24 hours for later use. Example 2 Preparation of polycyclodextrin 2

Embodiment 2

[0018] Add 4.4mmol β-CD and 35mmol isocyanate into 50ml dimethylformamide, and react under electromagnetic stirring at 65°C. The reaction time is 4-8 hours. After the reaction, the reaction system was washed with acetone, and the obtained reaction solid was washed with boiling water and hot ethanol in turn, and then dried in a vacuum oven at 40° C. for 24 hours for later use. Example 3 Preparation of polycyclodextrin 3

Embodiment 3

[0018] Add 4.4mmol β-CD and 35mmol isocyanate into 50ml dimethylformamide, and react under electromagnetic stirring at 65°C. The reaction time is 4-8 hours. After the reaction, the reaction system was washed with acetone, and the obtained reaction solid was washed with boiling water and hot ethanol in turn, and then dried in a vacuum oven at 40° C. for 24 hours for later use. Example 3 Preparation of polycyclodextrin 3

[0019] Add 4.4mmol β-CD and 1.5mmol cholesterol to 50ml dimethyl sulfoxide solvent, then add 28mmol isocyanate, and react under electromagnetic stirring at 65-70°C for 3-10 hours. After the reaction, the reaction system was washed with acetone, and the obtained reaction solid was washed with boiling water, hot ethanol, and tetrahydrofuran in sequence, and then dried in a vacuum oven at 40° C. for 24 hours for later use. Example 4 Preparation of polycyclodextrin 4

[0020] Add 4.4mmol β-CD and 1.5mmol cholesterol into 50ml dimethylformamide solvent, then add ...

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Abstract

The polycyclodextrin preparing process is that alpha-, beta, gamma-cyclodextrin or their derivative monomer is first polymerized through reaction under the action of crosslinking agent and template agent inside solvent to produce polymer, which is then pelletized, washed and dried to obtain polycyclodextrin product. It features that solvent dimethyl methane amide or dimethyl sulfoxide in the amount of making a molar concentration of cyclodextrin monomer of 0.05-0.15 mol / l; the crosslinking agent diisocyanate in the amount of 7-9 molar times cyclodextrin monomer; template agent cholesterin, benzyl phenol or hydroxyazobenzene in the amount of 0.25-0.4 molar times cyclodextrin monomer and the polymerization temperature 60-80 deg.c. Polycyclodextrin has high adsorption capacity to organic in water and can be used to lower the organic matter concentratino in water to ppb level. It is easy to regenerate and has good filming property.

Description

technical field [0001] The invention relates to a preparation method of polycyclodextrin, an adsorbent for water body purification. The invention belongs to the preparation technology of polycyclodextrin as an adsorbent. Background technique [0002] The ring structure and hydrophobic inner cavity of cyclodextrin (CD) allow it to accommodate a variety of organic or inorganic compound molecules, forming non-covalently bonded host-guest complexes, that is, inclusion complexes ( Inclusion Complex). This characteristic of cyclodextrin can be used in water purification, and cyclodextrin can be used as an adsorbent to effectively remove organic pollutants in water. [0003] However, due to the water solubility of cyclodextrin, it generally cannot be used directly as an adsorbent in water. In addition, the interaction between natural cyclodextrin and organic molecules is generally relatively weak (the inclusion constant is generally between 10-1000), which l...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/24C08B37/16
Inventor 姜忠义吴洪贾琦鹏
Owner TIANJIN UNIV
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