Adsorption resin with centralized pore diameter and large Micropore specific surface area and method for producing the same

A technology with large specific surface area and adsorption resin, which is applied in other chemical processes, chemical instruments and methods, etc., can solve the problem of uneven pore size distribution of ultra-high cross-linked adsorption resin, and achieve simple equipment, good adsorption selectivity, and uniform pore distribution Effect

Active Publication Date: 2008-10-01
NANJING UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Aiming at the problem of uneven pore size distribution of existing ultra-high cross-linked adsorption resins, the present invention provides an adsorption resin with concentrated pore size distribution and large micropore specific surface area and its preparation method, and synthesizes a narrow distribution microporous resin

Method used

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  • Adsorption resin with centralized pore diameter and large Micropore specific surface area and method for producing the same
  • Adsorption resin with centralized pore diameter and large Micropore specific surface area and method for producing the same
  • Adsorption resin with centralized pore diameter and large Micropore specific surface area and method for producing the same

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] The low cross-linked polymer with styrene-divinylbenzene skeleton was synthesized by suspension polymerization. The water phase (500g) contained 1g of hydroxyethyl cellulose, 2g of sodium carbonate, 30g of magnesium sulfate, and 100g of table salt. The oil phase (300 g) contained: 176.5 g of styrene monomer, 23.5 g of divinylbenzene (purity: 55.1%), and 100 g of ethylene glycol monomethyl ether. Add 3 g of initiator benzoyl peroxide in addition. The polymerization reaction is carried out in a three-necked flask of 1000 milliliters, first add the pre-configured water phase, add the oil phase containing the initiator under stirring, add 2ml of 15% (w / w) methylene blue aqueous solution, and stir the oil phase Disperse, the speed of stirrer is controlled at 300rpm, then add the sodium lignosulfonate aqueous solution of 8ml10% (w / w); Polymerization reaction temperature is 78 ℃, after reacting for 10 hours, keep warm at 85 ℃ for 6 hours, then be warming up to 90 ℃ boil ball...

Embodiment 2

[0038] The low cross-linked polymer with styrene-divinylbenzene skeleton was synthesized by suspension polymerization. The aqueous phase (400 g) contained 0.8 g of hydroxyethyl cellulose, 1.6 g of sodium carbonate, and 24 g of magnesium sulfate. The oil phase (240 g) contained 89.8 g of monomeric styrene, 43.2 g of divinylbenzene (80% purity), and 107 g of ethylene glycol monomethyl ether. In addition, 1 g of benzoyl peroxide and 1.4 g of azobisisobutyronitrile (AIBN) were added. The polymerization reaction was carried out in a 1000 ml three-necked flask. First add the pre-configured water phase, add the oil phase containing the initiator under stirring, add 1ml of 30% (w / w) methylene blue aqueous solution, stir and disperse the oil phase, control the speed of the stirrer at 300rpm, and then Add 4ml of 20% (w / w) sodium lignosulfonate aqueous solution; the polymerization temperature is 75°C, and after 10 hours of reaction, keep the temperature at 80°C for 6 hours, then heat u...

Embodiment 3

[0040] The low cross-linked polymer with styrene-divinylbenzene skeleton was synthesized by suspension polymerization. The aqueous phase (500 g) contained 3 g of hydroxyethyl cellulose, 0.5 g of sodium lignosulfonate, 2 g of sodium carbonate, 30 g of magnesium sulfate, and 100 g of table salt. The oil phase (300 g) contained 229.3 g of monomeric styrene, 23.5 g of divinylbenzene (purity: 55.1%), and 47.2 g of tetraethylene glycol monomethyl ether. Add 3 g of initiator benzoyl peroxide in addition. The polymerization reaction is carried out in a three-necked flask of 1000 milliliters, first add the pre-configured water phase, add the oil phase containing the initiator under stirring, add 6ml of 5% (w / w) methylene blue aqueous solution, and stir the oil phase Disperse, the speed of the stirrer is controlled at 300rpm, and then add 2.5ml of 20% (w / w) sodium lignosulfonate aqueous solution; the polymerization temperature is 78 ° C, after 10 hours of reaction, keep it at 85 ° C fo...

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Abstract

The invention discloses an adsorption resin with concentrated aperture and larger micro-hole area compared with a superficial area and a preparation method of the adsorption resin. The resin apertures are concentrated and distributed in the area of 1.5-2.5nm; the micro-hole proportion is more than 60%. The preparation method of the resin has the steps as follows: (1) synthesis of narrow distribution micro-hole low crosslinking polystyrene resin; (2) chloromethylation of the narrow distribution micro-hole low crosslinking polystyrene resin under the catalysis of lewis acid catalyst; (3) subsequent crosslinking reaction of chloromethylated low crosslinking polystyrene resin under the catalysis of lewis acid catalyst. The microporosity of the resin prepared by the invention achieves 60-95%; the micro-hole has uniform distribution and has obvious single peak characteristic and obvious separation effect on the organic matters with identical chemical structure type and different molecule sizes, and can be effectively used for disposing and recycling corresponding organic wastewater. The reagent used by the method provided by the invention is relatively simple and easy to buy, and the required equipment is simple and easy.

Description

technical field [0001] The invention relates to an adsorption resin and a synthesis method thereof, in particular to an ultra-high cross-linking adsorption resin with concentrated pore diameter and large micropore specific surface area and a preparation method thereof. Background technique [0002] Adsorption resin is characterized by porosity, and its pore size, pore distribution, pore volume, pore surface area, resin skeleton structure, and surface chemical structure are key factors affecting its performance. In the general adsorption separation process, the adsorption selectivity of the resin can be significantly improved by adjusting the polarity of the resin skeleton and introducing special functional groups to cause hydrogen bond interaction, electrostatic interaction, and dipole interaction. The composition of organic chemical wastewater is complex, and some raw materials, intermediates and products coexist. These substances are often basically similar in chemical pro...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/26B01J20/30
Inventor 李爱民邓丛林张波钱洪明陆朝阳张晓张龙钟声张全兴
Owner NANJING UNIV
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