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Vicinal diol functionalized macroporous through-hole material as well as preparation method and boric acid adsorption application thereof

A technology of vicinal diols and functionalization, which is applied in chemical instruments and methods, adsorption water/sewage treatment, inorganic chemistry, etc., to achieve acid-base stability, facilitate later removal, and avoid consumption

Active Publication Date: 2020-11-13
TONGJI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, there are still few adsorbent methods that meet the actual needs

Method used

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  • Vicinal diol functionalized macroporous through-hole material as well as preparation method and boric acid adsorption application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] (1) Add sodium dodecylbenzenesulfonate (0.14g, 0.4mmol) to an aqueous solution of polyethyleneimine (20wt.%, 2ml, pH 9.1), stir and mix;

[0029] (2) Add microcrystalline cellulose (0.2 g) to the system. The mixture was shaken on a shaker at 1000 rpm for 10 minutes to form an air-in-water emulsion.

[0030] (3) Add polyethylene glycol diglyceryl ether liquid (0.5 g, molecular weight 500, 1 mmol) into the emulsion, and continue shaking for 5 minutes. The mixture was left at room temperature for 6 hours.

[0031] (4) Vacuum treatment with a water pump at 60°C. After about 1.6mL of water is removed, the porous solid is taken out, cut into small pieces (about 2 mm square), immersed in NaOH (5%) aqueous solution (15mL), stirred gently, and removed. Wash with water once.

[0032] (5) The solid was immersed in an ethanol solution (20 mL) of glycidyl ether (3 g, 40 mmol), and stirred gently at 50° C. for 12 hours. Take out and dry. figure 1 It is a scanning electron micros...

Embodiment 2

[0035] In Example 1, linear polyethyleneimine was used instead of branched polyethyleneimine, and the pH was also adjusted to 9.1. The viscosity of the system is higher and the emulsion is more stable. The boron adsorption amount of the corresponding porous adsorbent is 33 mg (boron element) / g.

Embodiment 3

[0037] In embodiment 1, replace sodium dodecylbenzene sulfonate with stearic acid (or lauric acid, or sodium lauryl sulfate) of the same quality, and similar porous adsorbent is also obtained.

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Abstract

The invention discloses a vicinal diol functionalized macroporous through-hole material as well as a preparation method and boric acid adsorption application thereof. The preparation method comprisesthe following steps: (1) adding an anionic surfactant into a polyethyleneimine aqueous solution; (2) adding microcrystalline cellulose into the system as a supporting material, and oscillating at a high speed for several minutes to form an air-in-water emulsion; (3) adding a cross-linking agent into the air-in-water emulsion, and oscillating at a high speed for several minutes to partially cross-link polyethyleneimine to cure the emulsion to form a block material; (4) forming a through-hole material through vacuum dehydration, wherein the microcrystalline cellulose can prevent the porous material from overall great shrinkage in the dehydration process, but local microscopic shrinkage still occurs, so that a porous through-hole structure is formed, and the anionic surfactant adsorbed on thesurface of holes is removed through alkaline washing; and (5) converting amino hydrogen on the surface of the porous material into vicinal diol functional groups through glycidyl ether treatment. Thevicinal diol functionalized macroporous through-hole material has the characteristics of simplicity and convenience in preparation, large adsorption capacity, mild regeneration conditions, repeated regeneration and no powder falling.

Description

technical field [0001] The invention belongs to the technical field of water treatment and separation, and in particular relates to a porous material functionalized with ortho-diol, a preparation method thereof and the application of boric acid adsorption. Background technique [0002] Seawater desalination technology has been widely used all over the world, but desalinated seawater often contains excessive boric acid. Boric acid ions are small in size and have strong membrane penetration ability, and conventional (reverse) osmosis membranes cannot resist it; meanwhile, boric acid exists in various forms as the pH changes, which brings certain challenges to boric acid treatment. In the adsorption method, o-diols and o-polyols have good effects on boric acid, and sugar derivatives with o-polyol structures can be used for boric acid adsorption. Macroporous through-porous polymers have higher specific surface area and faster material exchange rate, and are popular adsorption c...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/26B01J20/28B01J20/30C02F1/28C02F101/10
CPCB01J20/267B01J20/28054C02F1/285C02F2101/108Y02A20/131
Inventor 万德成翁诗琦金明
Owner TONGJI UNIV
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