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A kind of o-chloroaniline adsorbent and preparation method thereof

A technology of o-chloroaniline and adsorbent, which is applied in the application field of o-chloroaniline, can solve the problems that o-chloroaniline has not been reported in the literature, and achieve the effect of high adsorption performance

Active Publication Date: 2020-09-15
CHINESE RES ACAD OF ENVIRONMENTAL SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] However, the application of anionic surfactant-modified hydrotalcite as an adsorbent to remove o-chloroaniline in wastewater has not been reported in the literature.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0014] Preparation of SAS-Mg 1.5 Adsorption performance test of Al-LDHs and o-chloroaniline

[0015] 38.46g of magnesium nitrate and 37.51g of aluminum nitrate were dissolved in 300mL of decarbonated water, named solution A. Dissolve 30.5 g of sodium secondary alkylsulfonate (SAS) and 10 g of sodium hydroxide into 300 mL of decarbonated water, named solution B. Add solution A and solution B dropwise to decarbonated deionized water at the same time at a rate of 10mL / min to form a reaction solution. By adjusting the drop rate of solution A and solution B, the pH of the deionized water is always maintained at (9± 0.3), crystallize at room temperature for 6 hours after the dropwise addition, and centrifuge and dry to obtain powdered SAS-Mg 1.5 Al-LDHs, the amount of SAS in modified hydrotalcite was determined by high performance liquid chromatography to obtain SAS-Mg 1.5 The mass fraction of SAS in the Al-LDHs sample was 41%.

[0016] (a) Add 0.018g of SAS-Mg 1.5 Al-LDHs disp...

Embodiment 2

[0019] Preparation of LAS-Mg 1.5 Adsorption performance test of Al-LDHs and o-chloroaniline

[0020] 38.46g of magnesium nitrate and 37.51g of aluminum nitrate were dissolved in 300mL of decarbonated water, named solution A. Dissolve 27.6 g of sodium dodecylbenzenesulfonate (LAS) and 9 g of sodium hydroxide into 300 mL of decarbonated water, and name it solution B. Add solution A and solution B dropwise to decarbonated deionized water at a rate of 10mL / min at the same time to form a reaction solution. By adjusting the dropping speed of solution A and solution B, the pH of the deionized water is always maintained at (8.5± 0.3), crystallize at room temperature for 6 hours after the dropwise addition, and centrifuge and dry to obtain powdered LAS-Mg 1.5 Al-LDHs, the amount of LAS in the modified hydrotalcite was determined by high-performance liquid chromatography, and the LAS-Mg 1.5 The mass fraction of LAS in the Al-LDHs sample was 39%.

[0021] (a) Add 0.018g of LAS-Mg 1....

Embodiment 3

[0024] Preparation of SDS-Mg 1.5 Adsorption performance test of Al-LDHs and o-chloroaniline

[0025] 38.46g of magnesium nitrate and 37.51g of aluminum nitrate were dissolved in 300mL of decarbonated water, named solution A. Dissolve 21.3 g of sodium dodecyl sulfate (SDS) and 11 g of sodium hydroxide into 300 mL of decarbonated water, named solution B. Add solution A and solution B dropwise to decarbonated deionized water at a rate of 10mL / min at the same time to form a reaction solution. By adjusting the dropping speed of solution A and solution B, the pH of the deionized water is always maintained at (8.5± 0.3), crystallize at room temperature for 6 hours after the dropwise addition, and dry by centrifugation to obtain powdered SDS-Mg 1.5 Al-LDHs, using high-performance liquid chromatography to measure the amount of SDS in modified hydrotalcite, to obtain SDS-Mg 1.5 The mass fraction of SDS in the Al-LDHs sample was 35%.

[0026] (a) Add 0.018g of SDS-Mg 1.5 Al-LDHs dis...

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Abstract

The invention provides a hydrotalcite based on anionic surfactant modification and a preparation method. The modified hydrotalcite can be used as an adsorbent to adsorb o-chloroaniline in wastewater. The anionic surfactant is used as a modifying agent and is one of secondary alkane sulfonate sodium (SAS), sodium dodecyl benzene sulfonate (LAS), lauryl sodium sulfate (SDS), and alpha-alkenyl sodium sulfonate (AOS). The modified hydrotalcite (Mg1.5Al-LDHs) is prepared by a co-precipitation method. At a room temperature, the o-chloroaniline adsorption amount of modified hydrotalcite is 90-178 mg / g, and adsorption balance can be reached within 2 hours. The adsorbent has the advantages of cheap price, large adsorption capacity, and strong operability.

Description

technical field [0001] The invention relates to the technical field of water treatment, in particular to the application of magnesium-aluminum binary hydrotalcite as an adsorbent to remove o-chloroaniline in wastewater. Background technique [0002] O-Chloroaniline is an amber liquid with an ammonia odour. O-chloroaniline is a very important industrial raw material, which is widely used as the color base of ice dyeing dyes, as a color developer for dyeing and printing of cotton fabrics such as towels, colored yarns, and colored cloths, and viscose fabrics. Intermediates in organic synthesis. O-Chloroaniline is highly toxic to aquatic organisms, not easy to degrade, and may cause long-term adverse effects on aquatic organisms. As a persistent organic pollutant, it has strong carcinogenic, teratogenic, and mutagenic effects. The research on the wastewater treatment of chloroaniline is very important. [0003] At present, the methods for removing o-chloroaniline in industry ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J20/22B01J20/30C02F1/28C02F101/38
CPCB01J20/08B01J20/223C02F1/285C02F2101/38
Inventor 王成许秋瑾
Owner CHINESE RES ACAD OF ENVIRONMENTAL SCI