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Salicylic acid modified styrene polymer and method for adsorbing and recovering aniline components in industrial waste water by using salicylic acid modified styrene polymer

A technology of styrene polymer and salicylic acid, which is applied in separation methods, adsorption water/sewage treatment, water pollutants, etc., can solve the problems of increasing the difficulty and cost of secondary treatment, a large amount of sludge, and insufficient water supply. Achieve good adsorption effect and desorption effect, no secondary pollution, low production cost

Inactive Publication Date: 2018-09-04
HUIZHOU RES INST OF SUN YAT SEN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Another serious accident occurred in December 2012, when about 8.7 tons of aniline leaked into the Zhuozhang River, and the water supply of Handan City was cut off, resulting in insufficient water supply for more than 1 million people
However, the biggest disadvantage of this method is that a large amount of sludge will be generated during the purification process of aniline wastewater, which increases the difficulty and cost of secondary treatment for enterprises

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] Preparation of salicylic acid modified styrene polymer adsorption material (1):

[0030] Take styrene-chloromethylstyrene resin (5 g) in a 50 ml three-neck round bottom flask, add 25 mL of 1,2-dichloroethane to swell overnight. Add catalyst zinc chloride (0.6 g) and modifier salicylic acid 0.1 g to the swollen product, and stir slowly until the system is evenly mixed. Within 1.5 h, the temperature was slowly raised to 115 °C, and the reaction was continued at this temperature for 12 h. After the reaction was completed, the product was filtered, and the product was alternately washed with 1% hydrochloric acid aqueous solution and absolute ethanol until the washing liquid was transparent, and then washed with distilled water until the pH of the washing liquid was neutral. The resin was filtered, the product was placed in a vacuum drying oven, and dried under reduced pressure at 80 °C for 12 h to obtain the final product salicylic acid-modified styrene polymer adsorption ...

Embodiment 2

[0032] Preparation of salicylic acid modified styrene polymer adsorption material (2):

[0033] Take styrene-chloromethylstyrene resin (5 g) in a 50 ml three-neck round bottom flask, add 25 mL of 1,2-dichloroethane to swell overnight. Add catalyst ferric chloride (0.6 g) and modifying agent salicylic acid about 0.15 g to the swollen product, and stir slowly until the system is evenly mixed. Within 1.5 h, the temperature was slowly raised to 115 °C, and the reaction was continued at this temperature for 12 h. After the reaction was completed, the product was filtered, and the product was alternately washed with 1% hydrochloric acid aqueous solution and absolute ethanol until the washing liquid was transparent, and then washed with distilled water until the pH of the washing liquid was neutral. The resin was filtered, the product was placed in a vacuum drying oven, and dried under reduced pressure at 80° C. for 12 hours to obtain the final product salicylic acid-modified styren...

Embodiment 3

[0035] Treatment of aniline-containing wastewater solutions:

[0036]50 mL of 1000 mg / L aniline wastewater solution was placed in a 100 mL Erlenmeyer flask, and then 0.05 g of the adsorbent material of Example 1 was put into the Erlenmeyer flask, placed in a 20° C. Shake the culture at full temperature for 18 h. After shaking, the supernatant was taken, and the concentration of aniline in the wastewater solution before and after adsorption was analyzed by a UV-visible spectrophotometer. It is known from the results that the adsorption capacity of the adsorbent to aniline is 132 mg / g; then it is eluted with absolute ethanol, and the content of aniline in the desorption solution is measured using a UV-visible light spectrophotometer, and the elution rate is known from the results. 93%.

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Abstract

The invention discloses a salicylic acid modified styrene polymer and a method for adsorbing and recovering aniline components in industrial waste water by using the salicylic acid modified styrene polymer. According to the method, the synthesized salicylic acid modified styrene polymer serves as an adsorbing material to adsorb the aniline components such as aniline, p-aminotoluene, p-chloroaniline and para aminobenzoic acid in the waste water, and the maximal adsorption capacity can reach to 132, 155, 229 and 113 mg / g respectively. Experimental results show that the adsorption capacity is obviously higher than the maximal adsorption capacity, on the aniline compounds, of the adsorbing materials such as active carbon, coal ash and modified zeolite. The method provided by the invention hasthe advantages of simple material preparation process, reusability, mild adsorption condition, energy conservation, environmental friendliness, low cost and the like.

Description

technical field [0001] The invention belongs to the technical field of synthesis of adsorbent and sewage treatment, and in particular relates to a method for adsorbing and recovering aniline components in industrial waste water and the preparation of the adsorbent material. Background technique [0002] With the development of modern industry, vicious water pollution accidents occur frequently. According to statistics, a total of 1,176 water pollution accidents occurred from 2000 to 2011, and the occurrence of these pollution accidents threatened the safety of water sources. In these accidents, organic pollution accounts for a considerable proportion. For example, in 2005, 100 tons of benzene substances (benzene, nitrobenzene, etc.) flowed into the Songhua River after an explosion occurred in the workshop of Jilin Petrochemical Company's double benzene plant, causing serious pollution of the river and affecting the lives of millions of residents along the coast. A five-day...

Claims

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Application Information

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IPC IPC(8): B01J20/26B01J20/30B01J20/34C02F1/28C02F101/34C02F101/36C02F101/38
CPCB01J20/265B01J20/3425B01J20/3475C02F1/285C02F2101/34C02F2101/36C02F2101/38C02F2303/16
Inventor 纪红兵李秋如杨祖金
Owner HUIZHOU RES INST OF SUN YAT SEN UNIV
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