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Method for preparing sodium bentonite by using sodium fluoride through semi-dry method under assistance of microwaves

A sodium-based bentonite, microwave-assisted technology, applied in chemical instruments and methods, inorganic chemistry, silicon compounds, etc., can solve the problems of high filtration loss, low efficiency of nano-based bentonite, and many processing procedures.

Active Publication Date: 2021-04-23
LIAONING UNIVERSITY OF PETROLEUM AND CHEMICAL TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The main technical problem to be solved by the present invention is to provide a method for preparing sodium bentonite by semi-dry method using sodium fluoride under the assistance of microwaves, aiming at the shortcomings of low efficiency, complicated treatment process and high filtration loss in the preparation of nano bentonite

Method used

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  • Method for preparing sodium bentonite by using sodium fluoride through semi-dry method under assistance of microwaves
  • Method for preparing sodium bentonite by using sodium fluoride through semi-dry method under assistance of microwaves

Examples

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Embodiment 1

[0021] Weigh 0.6g of sodium fluoride and place it in a dry beaker, measure 15ml of ethanol solution with a mass fraction of 50% and put it into the beaker, adjust the pH value of the solution to 7 on a constant temperature magnetic stirrer, and set the stirring temperature to 80°C , The stirring speed is 70r / min, the stirring time is 7min, stirring to completely dissolve sodium fluoride in the ethanol solution; weigh 7g of calcium-based bentonite and put it into a special beaker for microwave-assisted synthesis reactor, and add 14ml of modified Put it on a constant temperature magnetic stirrer, set the stirring temperature to 80°C, the stirring speed to 70r / min, and the stirring time to 7min, stir it evenly, add 30ml of water to make the solution evenly dispersed, and put it in the microwave reactor , set the microwave power to 400 W, the microwave treatment temperature to 50°C, and carry out the microwave reaction for 2 minutes; heat the solution after the microwave reaction t...

Embodiment 2

[0023] Weigh 0.5g of sodium fluoride and place it in a dry beaker, measure 12ml of ethanol solution with a mass fraction of 50% and put it into the beaker, adjust the pH value of the solution to 7 on a constant temperature magnetic stirrer, set the stirring temperature to 70°C, The stirring speed is 65r / min, the stirring time is 7min, and the sodium fluoride is completely dissolved in the ethanol solution by stirring; weigh 6g of calcium-based bentonite and put it into a special beaker for microwave-assisted synthesis reactor, and add 13ml of modifier into the special beaker , put it on a constant temperature magnetic stirrer, set the stirring temperature to 75°C, the stirring speed to 65r / min, and the stirring time to 7min, stir it evenly, add 25ml of water to make the solution evenly dispersed, in the microwave reactor, Set the microwave power at 500 W, the microwave treatment temperature at 45°C, and carry out the microwave reaction for 2 minutes; heat the solution after the...

Embodiment 3

[0025] Weigh 0.4g of sodium fluoride and place it in a dry beaker, measure 10ml of ethanol solution with a mass fraction of 50% and put it into the beaker, adjust the pH value of the solution to 7 on a constant temperature magnetic stirrer, and set the stirring temperature to 65°C , the stirring speed is 60r / min, the stirring time is 6min, stirring to completely dissolve sodium fluoride in the ethanol solution; weigh 6g of calcium-based bentonite and put it into a special beaker for microwave-assisted synthesis reactor, and add 10ml of modified Put it on a constant temperature magnetic stirrer, set the stirring temperature to 70°C, the stirring speed to 60r / min, and the stirring time to 6min, stir it evenly, add 20ml of water to make the solution evenly dispersed, and put it in a microwave reactor , set the microwave power to 400W, the microwave treatment temperature to 45°C, and carry out the microwave reaction for 1.5min; heat the solution after the microwave reaction to 70°C...

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Abstract

The invention discloses a method for preparing sodium bentonite by using sodium fluoride through a semidry method under assistance of microwaves, and the sodium bentonite is prepared by the following preparation method: weighing a certain amount of sodium fluoride and an ethanol solution to prepare a modifier solution, weighing calcium bentonite, adding the modifier solution, adding a proper amount of water, carrying out microwave reaction, standing and centrifuging the reacted mixed solution, washing the supernatant, conducting drying and grinding to obtain sodium bentonite, filtering out impurities from the lower residue, and conducting purifying and recycling. Compared with the sodium bentonite prepared by a conventional method, the sodium bentonite provided by the invention has the advantages of simple treatment, higher modification efficiency, better expansion capacity and better filtrate loss reduction capacity.

Description

technical field [0001] The invention belongs to the technical field of bentonite, and in particular relates to a method for preparing sodium-based bentonite by a semi-dry method using sodium fluoride under the assistance of microwaves. Background technique [0002] Bentonite is a clay rock mainly composed of montmorillonite, which has water absorption expansion, dispersion suspension, thixotropy, cohesiveness, plasticity and ion exchange properties. These properties are related to the type of cations contained in bentonite itself. Calcium-based bentonite is the main bentonite in the world, but calcium-based bentonite has low grade and poor performance, which cannot meet the national standard requirements in industry. The properties of sodium-based bentonite are superior to calcium-based bentonite in all aspects, so the modification of calcium-based bentonite to prepare sodium-based bentonite with better performance has always been the focus of bentonite processing and appli...

Claims

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Application Information

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IPC IPC(8): C01B33/40
CPCC01B33/40C01P2006/80C01P2002/72Y02P20/10
Inventor 杨双春张长青李巍李沼萱潘一崔祥龙李磊贾宇航詹倩茹佟乐
Owner LIAONING UNIVERSITY OF PETROLEUM AND CHEMICAL TECHNOLOGY