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Resin regeneration performance strengthening method using surface functional group

A technology of adsorption resin and composite function, which is applied in the field of treating alkaline organic wastewater by using alkaline composite function adsorption resin

Inactive Publication Date: 2012-04-11
NANJING UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004]At present, the technical development of the resin adsorption method for purifying organic industrial wastewater mainly focuses on strengthening the adsorption performance of the adsorption resin, while most of the desorption regeneration resins simply use heating and conversion of organic The method where the pollutants are in the ionic state (i.e. using dilute alkali desorption to regenerate the adsorbed acidic organic pollutants, and dilute acid desorption to regenerate the adsorbed basic organic pollutants), the desorption regeneration process often accounts for 10% of the entire process operating cost. more than half

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] Take 30g of chlorine balls with a cross-linking degree of 8% (produced by Hebei Langfang Power Resin Factory, etc.), add 20ml of dichloroethane and swell for 12h in a 250ml three-neck flask, control the temperature of the solution to 278K, and keep stirring at a certain speed. 30ml of perchloric acid was added dropwise to continue the reaction for 12h, taken out for filtration, extraction, and drying. The product obtained was JX-101 acid composite functional adsorption resin, and the total content of hydroxyl and carboxyl groups of the resin was 0.6mmol / g.

[0028] Take 10mL (about 3g) of JX-101 acid composite functional adsorption resin (produced by Jiangsu Nanda Gold Environmental Protection Technology Co., Ltd., Hebei Langfang Power Resin Factory, etc.) and put it into a glass adsorption column with a jacket (Φ16×180mm). The COD of methyl salicylate production wastewater is about 16000mg / L after methanol is removed by stripping, mainly containing salicylic acid and re...

Embodiment 2

[0031] Take 30g of chlorine balls with a cross-linking degree of 6% (produced by Hebei Langfang Power Resin Factory, etc.), add 20ml of dichloroethane and swell for 12h in a 250ml three-neck flask, control the temperature of the solution to 303K, and keep stirring at a certain speed. 15ml of phenol was added dropwise and reacted continuously for 12h, then it was taken out and filtered, extracted and dried, and the obtained product was NDA-110 acid composite functional adsorption resin, and the hydroxyl content of the resin was 1.4mmol / g.

[0032] Take 10mL (about 3g) of NDA-110 acid composite functional adsorption resin (produced by Jiangsu Nanda Gold Environmental Protection Technology Co., Ltd., Hebei Langfang Power Resin Factory, etc.) and put it into a glass adsorption column (Φ16×180mm) with a jacket. The concentration of 2,4-dichlorophenol in the industrial wastewater is 300mg / L, adjust the pH to 2,4-dichlorophenol pKa (25℃) and then filter, and pass the filtrate through ...

Embodiment 3

[0035] Take 30g of chlorine balls with a cross-linking degree of 10% (produced by Hebei Langfang Power Resin Factory, etc.), add 20ml of nitrobenzene and swell for 12h in a 250ml three-necked flask, control the temperature of the solution to be 303K, and keep stirring at a certain speed. Add 10%H dropwise 2 O 2 25ml was continuously reacted for 8h, taken out and filtered, extracted and dried, and the obtained product was NDA-150 acid composite functional adsorption resin, and the carboxyl group content of the resin was 0.9mmol / g.

[0036] Take 10mL (about 3g) of NDA-150 acid composite functional adsorption resin (produced by Jiangsu Nanda Gold Environmental Protection Technology Co., Ltd., Hebei Langfang Power Resin Factory, etc.) and put it into a glass adsorption column with a jacket (Φ16×180mm). The TOC (total organic carbon) of the chromophenol As production wastewater is about 16000mg / L, mainly containing 2,3-acid. After adjusting the pH to 2,3-acid pKa (25℃), the TOC is...

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PUM

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Abstract

The invention discloses a method for utilizing surface functional group to intensify the regeneration performance of adsorption resin. The method comprises the following steps: (A), respectively adjusting the pH value of industrial waste water containing alkali organic substance to the pKb of the alkali organic substance at 25 DEG C and then carrying out filtration to eliminate suspended substances in the waste water; (B), ensuring that obtained filtrate passes through an adsorption tower filled with alkali composite functional adsorption resin; and (C), stopping adsorption when adsorption reaches a leakage point and taking dilute hydrochloric acid and dilute sulphuric acid as a desorption agent to desorb the alkali composite functional adsorption resin. The method does not influence adsorption performance and intensifies the regeneration performance of adsorption resin, thereby reducing the dosage of desorption agent, lowering desorption temperature and saving operation cost; therefore, the method is of great significance to the application and popularization of resin adsorption technology.

Description

[0001] This application is a divisional application with the application number 200710019265.6 of the invention titled "A Method for Introducing Surface Functional Groups to Strengthen the Regeneration Performance of Adsorption Resin" filed on January 10, 2007. technical field [0002] The invention relates to a method for introducing functional groups on the inner and outer surfaces of an adsorption resin to obtain an acidic functional resin or a basic functional resin, thereby enhancing the regeneration performance of the adsorption resin. Background technique [0003] Due to its high specific surface area, excellent pore structure, and easy operation, the adsorption resin has gradually replaced activated carbon and extractant for the adsorption and separation of organic poisons in water. Since the 1970s, scientists from various countries have used adsorption resins to carry out purification research on industrial wastewater containing toxic organic substances. China's ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J20/26B01J20/30
Inventor 张炜铭潘丙才许正文张庆建杜伟张庆瑞潘丙军洪昌红张全兴陈金龙
Owner NANJING UNIV
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