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Use of poly 1, 5-naphthylenediamine

A technology of naphthalene diamine and solution, which is applied in the field of poly-1, and can solve the problems of impurities, color development and pollution

Inactive Publication Date: 2010-07-14
TONGJI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0015] Adsorption between solid and liquid phases usually requires that the adsorbent used as the solid phase is insoluble or slightly soluble in the adsorbate used as the liquid phase, which is conducive to separation and recovery after adsorption, and the dissolution of the adsorbent will also introduce new impurities or produce color pollution

Method used

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  • Use of poly 1, 5-naphthylenediamine
  • Use of poly 1, 5-naphthylenediamine
  • Use of poly 1, 5-naphthylenediamine

Examples

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Embodiment 1

[0092] A method for synthesizing poly-1,5-naphthalene diamine, dissolving 1,5-naphthalene diamine in acetonitrile to make a solution, heating to 20°C and keeping constant temperature, then adding dropwise the distilled aqueous solution of ammonium persulfate, persulfuric acid The molar ratio of ammonium to 1,5-naphthalene diamine is 0.5:1, and the dropwise addition is completed in 30 minutes. After the dropwise addition, react for more than 24 hours, and filter to obtain the primary product of polymerization. Wash with distilled water to remove impurities such as residual oxidant and its by-products, oligomers, etc. until the filtrate is colorless, and wash with BaCl 2 Solution detection filtrate until there is no residual sulfate ion. Then transfer the filter cake to a beaker filled with distilled water, magnetic stirring, soaking and washing for a day and night, suction filtration, BaCl 2 The solution was checked again for the filtrate without sulfate ions remaining. Final...

Embodiment 2

[0094] A method for synthesizing poly-1,5-naphthalene diamine, dissolving 1,5-naphthalene diamine in acetonitrile to make a solution, heating to 20°C and keeping constant temperature, then adding dropwise the distilled aqueous solution of ammonium persulfate, persulfuric acid The molar ratio of ammonium to 1,5-naphthalene diamine is 1:1, and the dripping is completed in 30 minutes. After the dripping is completed, react for more than 24 hours, and filter to obtain the initial product of polymerization. Wash with distilled water to remove impurities such as residual oxidant and its by-products, oligomers, etc. until the filtrate is colorless, and wash with BaCl 2 Solution detection filtrate until there is no residual sulfate ion. Then transfer the filter cake to a beaker filled with distilled water, magnetic stirring, soaking and washing for a day and night, suction filtration, BaCl 2 The solution was checked again for the filtrate without sulfate ions remaining. Finally, the...

Embodiment 3

[0096] A method for synthesizing poly-1,5-naphthalene diamine, dissolving 1,5-naphthalene diamine in acetonitrile to make a solution, heating to 20°C and keeping constant temperature, then adding dropwise the distilled aqueous solution of ammonium persulfate, persulfuric acid The molar ratio of ammonium to 1,5-naphthalene diamine is 2:1, the dripping is completed in 30 minutes, and after the dripping is completed, react for more than 24 hours, and filter to obtain the primary product of polymerization. Wash with distilled water to remove impurities such as residual oxidant and its by-products, oligomers, etc. until the filtrate is colorless, and wash with BaCl 2 Solution detection filtrate until there is no residual sulfate ion. Then transfer the filter cake to a beaker filled with distilled water, magnetic stirring, soaking and washing for a day and night, suction filtration, BaCl 2 The solution was checked again for the filtrate without sulfate ions remaining. Finally, the...

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Abstract

The invention discloses a purpose of 1,5-naphthalenediamine and is characterized in that the 1,5-naphthalenediamine is used as an adsorbent for heavy metal ions. The inventive novel purpose of 1,5-naphthalenediamine is to efficiently adsorb heavy metal ions in solutions. The purpose of adsorb heavy metal ions by using 1,5-naphthalenediamine has the advantages of good adsorbability to heavy metal ions, high adsorption rate and suitability for industrialized production.

Description

technical field [0001] The invention relates to the use of poly-1,5-naphthalene diamine and its method for adsorbing heavy metal ions. Background technique [0002] Among the heavy metal ion adsorbents, one of them is a synthetic adsorbent. Polyethylene-based resin and silica gel-based resin are researched and developed earlier and more heavy metal ion adsorbents. They mainly improve their activity by modifying active groups. Adsorption capacity, with strong applicability. Compared with other adsorbent materials, they have the advantages of long service life and strong adsorption capacity, and some can also selectively separate and recover heavy metals from wastewater with polymetallic ions. When treating water, the concentration of lead ions can be reduced to 1ppb. The maximum adsorption capacity of early synthetic polymer adsorbents for lead ions is generally around 100 mg / g, and the adsorption capacity can be improved after the surface is modified, such as the adsorptio...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J20/22C02F1/28C02F1/62
Inventor 李新贵黄美荣蒋远波
Owner TONGJI UNIV