Method for synthesizing organic bentonite by ultrasonic wave combined with microwave

A technology of microwave synthesis and bentonite, applied in chemical instruments and methods, inorganic chemistry, silicon compounds, etc., can solve the problems of secondary pollution of surfactants, time-consuming and energy-consuming, large water volume, etc., to improve adsorption performance, improve product quality, etc. The effect of reducing quality and energy consumption

Inactive Publication Date: 2008-05-21
JIANGSU POLYTECHNIC UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The amount of water used is large, most of the energy is absorbed by the water, time-consuming and energy-consuming, and a large amount of wastewater containing surfactants is generated, which requires further treatment, making this organic modification method very uneconomical and prone to surfactant degradation. secondary pollution

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] Inner Mongolia calcium-based bentonite is selected, the organic modifier is cetylpyridinium chloride (CPC), and the dosage is 100% CEC. The organic modification was carried out in a box ultrasonic reactor for 2 minutes, and then placed in a rectangular resonant cavity microwave reactor for conditioning for 2 minutes. The ultrasonic frequency is 20kHz, the power is 2000W, and the microwave power is 5000W. Bake at 60°C for 12 hours, and grind through a 100-mesh sieve. The obtained organic bentonite has stable properties and uniform texture, and is used for the treatment of 2-naphthol-containing wastewater. When the mass ratio of the organic bentonite to wastewater is 1:3000, the removal rate of the wastewater with an organic matter concentration of 30 mg / L reaches 95%.

Embodiment 2

[0026] Lin'an sodium-based bentonite is selected, the organic modifier is cetyltrimethylammonium chloride (CTMAC), the dosage is 25% CEC, and the mass ratio of bentonite to modifier solution is 1:0.8 to prepare a paste. First carry out organic modification in the vibrating box ultrasonic reactor for 10s, and then place it in a rectangular resonant cavity microwave reactor for conditioning for 10s. The ultrasonic frequency is 120kHz, the power is 200W, and the microwave power is 100W. Bake at 120°C for 20 minutes, and grind through a 100-mesh sieve. The obtained organobentonite is stable in properties and uniform in texture, and is used for wastewater treatment containing 2-naphthol (30mg / L) and phenanthrene (1mg / L) respectively. The removal rate of Hephenanthrene reaches 95% and 99%.

Embodiment 3

[0028]Acidified Lin'an sodium-based bentonite is selected, the organic modifier is dodecyltrimethylammonium bromide, and the dosage is 150% CEC. The mass ratio of bentonite to modifier solution is 1:4 to prepare a paste. The organic modification was carried out in the vibrating box ultrasonic reactor for 60s, and then placed in a rectangular resonant cavity microwave reactor for conditioning for 1min. The ultrasonic frequency is 40kHz, the power is 1000W, and the microwave power is 700W. Bake at 120°C for 20 minutes, and grind through a 100-mesh sieve. The obtained organobentonite has stable properties and uniform texture, and is used for decolorization treatment of wastewater containing 2-naphthol (30mg / L) and orange II (50mg / L) respectively. When the mass ratio of organobentonite and waste water is 1: 3000, the The removal rates of naphthol and phenanthrene reached 95% and 99%.

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Abstract

The invention discloses a method used for synthesizing organic bentonite by ultrasonic wave associating with microwave. Granular or powder bentonite is mixed to be pasty with surfactant solution, wherein, the quantity of the surfactant is 0.2 to 2.5 times cation exchange capacity of the bentonite; then the surfactant and the bentonite go through ion exchanging by the microwave conditioning after ultrasonic oscillation treatment of the ultrasonic wave and the organic bentonite is obtained. The invention has simple processing and saves original processes such as filtering, rinsing, etc., and does not produce waste water as well as reduces energy consumption; the invention has small amount of water attending reaction, little energy waste caused by water absorption and low total energy consumption and does not need stirring in process; the ultrasonic wave speeds up the reaction and the synthesizing time is short; the ultrasonic wave simultaneously exerts grinding effect and the requirement for original soil particles of the bentonite is low; the microwave conditioning effect improves product quality and absorption performance and has good effect of removing organic pollutants.

Description

technical field [0001] The invention relates to a preparation method for synthesizing organic bentonite. Background technique [0002] Bentonite is a clay rock mainly composed of montmorillonite, and it is one of the most widely used non-metallic minerals. Organic bentonite is an organic bentonite that replaces the interlayer exchangeable cations in montmorillonite with organic cations (organic ammonium salts, quaternary ammonium salts, etc.), so that the bentonite changes from hydrophilic and oleophobic to oleophilic and hydrophobic. Organobentonite has properties such as adsorption, thixotropy, suspension, plasticity, and lubricity, and is widely used in chemical, petroleum, environmental protection, nanomaterials, and other fields. For decades, people have been studying how to simplify the synthetic process route of bentonite, reduce investment and operating costs, and be environmentally friendly. At present, in order to meet the special application needs and realize th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B33/44
Inventor 马建锋李定龙黄文艳
Owner JIANGSU POLYTECHNIC UNIVERSITY
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