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Modified bentonite as well as preparation method and application thereof

A bentonite and modification technology, which is applied in the field of modified bentonite and its preparation, can solve the problems of low surface activity, poor adsorption and encapsulation, and small specific surface area, and achieve the goal of increasing the coagulation and floating rate, reducing COD content, and improving surface activity. Effect

Pending Publication Date: 2020-09-29
苏州国建慧投矿物新材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The paint slag of this invention cannot completely float to the water surface, and a small amount (about 5%) of the paint slag is suspended in the circulating water or sinks to the bottom of the water, causing the turbidity or transparency of the circulating water to fail to meet the standard
[0005] In the prior art, the bentonite type paint mist coagulant used is common bentonite particles, which itself has low surface activity, few pores, and small specific surface area. Poor adsorption and wrapping effect, high mutual adhesion rate of paint mist, and poor adhesion breaking effect make the treatment efficiency of bentonite-type paint mist coagulant for paint mist sewage poor, which needs to be improved urgently

Method used

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  • Modified bentonite as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] (1) Get 100 parts by weight of sodium bentonite, put it into distilled water and fully soak it, after the sodium bentonite is fully expanded, add distilled water that can completely immerse the sodium bentonite and stir, during the stirring process, add 15 parts by weight of Methylcellulose, after stirring slowly for 30-60min, after standing still, take out the upper suspension to obtain bentonite slurry;

[0026] (2) Add 5-10 parts by weight of sodium chloride to the purified bentonite slurry, heat and stir at 50-55°C for 2-3 hours, put the filtered slurry into a drying oven, and then add 120 parts by weight of 30-60% sulfuric acid, heated at 50-70°C for 1-2 hours, filtered, washed and dried for use;

[0027] (3) Mix and grind the bentonite obtained in step S2 with 15 parts by weight of trimethylbenzyl ammonium chloride and 3 parts by weight of N-methylformamide, then add and stir to form a suspension. Next, heat for 1-2 hours, cool for later use;

[0028] (4) Add 0....

Embodiment 2

[0030] (1) Take 100 parts by weight of sodium bentonite, put it into distilled water and fully soak it, and then add distilled water that can completely immerse the sodium bentonite after the sodium bentonite is fully expanded and stir. During the stirring process, add 16 parts by weight of Methylcellulose, after stirring slowly for 30-60min, after standing still, take out the upper suspension to obtain bentonite slurry;

[0031] (2) Add 5-10 parts by weight of sodium chloride to the purified bentonite slurry, heat and stir at 50-55°C for 2-3 hours, put the filtered slurry into a drying oven, and then add 126 parts by weight of 30-60% sulfuric acid, heated at 50-70°C for 1-2 hours, filtered, washed and dried for use;

[0032] (3) The bentonite obtained in step S2 is mixed and ground with 17 parts by weight of trimethylbenzyl ammonium chloride and 4 parts by weight of N-methylformamide, and then added and stirred to form a suspension. Next, heat for 1-2 hours, cool for later u...

Embodiment 3

[0035] (1) Get 100 parts by weight of sodium bentonite, put it into distilled water and fully soak it, and then add distilled water that can completely immerse the sodium bentonite after the sodium bentonite is fully expanded and stir. During the stirring process, add 17 parts by weight of Methylcellulose, after stirring slowly for 30-60min, after standing still, take out the upper suspension to obtain bentonite slurry;

[0036] (2) Add 5-10 parts by weight of sodium chloride to the purified bentonite slurry, heat and stir at 50-55°C for 2-3 hours, put the filtered slurry into a drying oven, and then add 133 parts by weight of 30-60% sulfuric acid, heated at 50-70°C for 1-2 hours, filtered, washed and dried for use;

[0037] (3) Mix and grind the bentonite obtained in step S2 with 19 parts by weight of trimethylbenzyl ammonium chloride and 5 parts by weight of N-methylformamide, and then add and stir to form a suspension. Next, heat for 1-2 hours, cool for later use;

[0038...

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Abstract

The invention discloses modified bentonite as well as a preparation method and application thereof. The preparation method comprises the following steps: dissolving a bentonite raw material in distilled water, and adding methylcellulose and sulfuric acid to respectively carry out surface activation on bentonite; then performing sulfuric acid treatment to weaken the interlayer bond energy of bentonite and preliminarily expand the layer distance; then adding trimethyl benzyl ammonium chloride to enter the expanded bentonite sheet interlayers through ion exchange; finally adding lauryl sodium sulfate to generate bubbles; and then performing ultrasonic cleaning to increase the bubble amount, so that the modified bentonite has more pores. The modified bentonite prepared by the method has largerspecific surface area and stronger adsorption capacity, and is used in a paint mist coagulant to improve the coagulation floating rate, reduce the COD content and improve the perspective degree.

Description

technical field [0001] The invention relates to the field of coagulation agents for water treatment, in particular to a modified bentonite and its preparation method and application. Background technique [0002] If the equipment is exposed to the air or the external environment for a long time, it is prone to rust or other chemical reactions, causing damage to the equipment and affecting its service life and functions. Therefore, it is necessary to spray paint on the surface or wall of the equipment. During the air spray painting process, a large amount of paint mist and organic solvent gas are produced, which affects the health of the operator and seriously pollutes the surrounding environment and air. [0003] In the 1980s, the painting system of the wind pressure-water washing spray booth began to be used in China, which made a leap in the coating method, greatly improved the painting quality, and greatly reduced the pollution to the environment. However, the wind pressu...

Claims

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Application Information

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IPC IPC(8): C01B33/40C02F1/52
CPCC01B33/40C02F1/5236C02F2103/34
Inventor 王齐汪思孝任伟华周琳郁晨阳
Owner 苏州国建慧投矿物新材料有限公司