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Hyperbranched polymer for efficiently recovering boron and ultrafiltration process thereof

A technology of hyperbranched polymer and hyperbranched polymer, applied in ultrafiltration, water pollutants, chemical instruments and methods, etc., can solve the problems of low kinetics, low boron, interception, etc., and achieve the effect of improving interception efficiency

Pending Publication Date: 2021-07-27
徐州禹慧环境科技研究院有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, defects of low kinetics or low boron entrapment are likely to be found in most of the developed polymers except for limited studies

Method used

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  • Hyperbranched polymer for efficiently recovering boron and ultrafiltration process thereof
  • Hyperbranched polymer for efficiently recovering boron and ultrafiltration process thereof
  • Hyperbranched polymer for efficiently recovering boron and ultrafiltration process thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] The preparation method of hyperbranched polyglycidol (HPG), comprises the following steps,

[0031] A1: Combine 1.5 mmol pentaerythritol (THME) and 0.5 mmol NaOCH 3 Dissolve in 100 mL of methanol to obtain a mixture;

[0032] A2: Heat the mixture obtained from A1 to 75±1°C, then keep the temperature under vacuum for 4 hours to remove methanol and water, and generate sodium alkoxide;

[0033] A3: After the sodium alkoxide obtained in A2 is cooled, mix 1,4-dioxane with the cooled sodium alkoxide, and perform ultrasonic treatment for 20 minutes to obtain a uniform solution;

[0034] A4: The homogeneous solution obtained in A3 was continuously bubbled with argon for 10 minutes to remove dissolved oxygen, and the solution was kept in an inert atmosphere, then, the solution was stirred and heated to 95±1°C, and then at this temperature by automatic feeding The sampler slowly injected 150 mmol of argon-purified glycidol into the solution at a rate of 1.8 ml / h. After the glyc...

Embodiment 2

[0039] The preparation method of Diol-HPEI polymer comprises the following steps,

[0040] B1: 20 g of an aqueous hyperbranched polyethyleneimine (HPEI) solution was diluted with deionized water to a solids concentration of 10 wt% at room temperature and purged with argon for 10 minutes;

[0041] B2: At room temperature, 40 g of glycidol was slowly added to the hyperbranched polyethyleneimine (HPEI) solution within 20 minutes. After the addition, the solution was stirred at room temperature for 3 hours, and then heated in a water bath at 60°C for 3 hours. Hour;

[0042] B3: After B2 is heated, it is cooled at room temperature, and the cooled solution is purified by dialysis with a membrane tube with a MWCO range of 6000-8000 for 3 days;

[0043] B4: The purified solution was concentrated by vacuum distillation in a rotary evaporator to obtain a viscous solution, and the concentrated solution was lyophilized overnight to obtain the Diol-HPEI polymer.

[0044]The chemical form...

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Abstract

The invention belongs to the technical field of membrane filtration, and particularly relates to a hyperbranched polymer for efficiently recovering boron and an ultrafiltration process thereof. The invention discloses a hyperbranched polymer for efficiently recovering boron, the hyperbranched polymer is a hyperbranched polyhydroxy polymer, and the hyperbranched polyhydroxy polymer is one of hyperbranched polyglycerol and a Diol-HPEI polymer; the hyperbranched polyglycidol is synthesized through an anion ring-opening polymerization reaction of glycidol on a pentaerythritol (THME) core, NaOCH3 is used as a catalyst, and 1, 4-dioxane is used as a reaction medium; and the Diol-HPEI polymer is synthesized by grafting glycidol to hyperbranched polyethyleneimine (HPEI) molecules through an epoxy amine nucleophilic addition reaction. The invention also discloses an ultrafiltration process of the hyperbranched polymer for efficiently recovering boron, which comprises the following steps: S1, dissolving the hyperbranched polymer in a solution containing boric acid, and adjusting the pH value; and S2, after adjustment is completed, stirring for 50-70 min, and then using an ultrafiltration membrane for filtering the solution.

Description

technical field [0001] The invention belongs to the technical field of membrane filtration, and in particular relates to a hyperbranched polymer for efficiently recovering boron and an ultrafiltration process. Background technique [0002] As a ubiquitous element in nature, boron is mainly distributed in various water bodies in the form of boric acid. In industry, boron compounds are mainly used in the production of glass fibers, detergents, fuel cells, etc. However, when it reaches a certain level, it is also toxic. Therefore, boron is a potential water pollutant and an important industrial raw material, which needs to be recycled from wastewater and seawater urgently. Due to the complex morphology of boron, there is currently no efficient and economical method to separate boron from wastewater, especially from neutral solutions, because the molecular properties of unseparated boric acid are very similar to water molecules. To date, technologies including reverse osmosis...

Claims

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Application Information

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IPC IPC(8): C08G65/28C08G65/26C02F1/44B01D61/20C02F101/10
CPCC08G65/2609C08G65/2648C08G65/2624C02F1/444B01D61/20B01D61/145C02F2101/108
Inventor 唐宇攀宋岩伟鲍士彪
Owner 徐州禹慧环境科技研究院有限公司
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