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Preparation method and application of ball-milling organic modified bentonite for retention and filter aids in papermaking

A retention and drainage aid, bentonite technology, applied in the direction of retention aid addition, chemical instruments and methods, inorganic chemistry, etc., can solve problems such as difficulty in ensuring product uniformity, large equipment investment, and surfactant pollution, and achieve improved Retention and drainage effect, simple preparation method, effect of improving retention rate

Inactive Publication Date: 2011-09-14
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

These two modification methods are more complicated, and the equipment investment is large, so the cost is higher
And it is difficult to ensure the uniformity of the product, it is easy to cause the pollution of the surfactant, and the waste water produced is also relatively serious to the pollution of the environment.

Method used

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  • Preparation method and application of ball-milling organic modified bentonite for retention and filter aids in papermaking
  • Preparation method and application of ball-milling organic modified bentonite for retention and filter aids in papermaking
  • Preparation method and application of ball-milling organic modified bentonite for retention and filter aids in papermaking

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] (1) Disperse 5g of bentonite with a 200-mesh sieve in 100ml of water, stir on a magnetic stirrer for 0.5h, and place it in an ultrasonic instrument for 10min to make the bentonite fully disperse into a suspension in water;

[0035] (2) Take 16g of surfactant STAB and add 100ml of distilled water to form a solution, add 45% of the surfactant relative to the mass of bentonite to the pretreated bentonite suspension, stir for 5 minutes, and then place it in a water bath at 60°C After reacting for 3 hours, take it out, place it in a Buchner funnel, and wash it with distilled water several times under the hydraulic suction filter until the filtrate washed out is in the AgNO 3Until there is no white precipitate under titration, the filter cake obtained by suction filtration is dried in a vacuum oven at 50°C for 30 minutes to obtain organically modified bentonite;

[0036] (3) Put the organically modified bentonite in step (2) in the ball mill tank of the planetary ball mill an...

Embodiment 2

[0039] (1) Disperse 5g of bentonite with a 200-mesh sieve in 100ml of water, stir on a magnetic stirrer for 1 hour, and place it in an ultrasonic instrument for 20 minutes of ultrasound to fully disperse the bentonite into a suspension in water;

[0040] (2) Take 30g of surfactant STAB and add 100ml of distilled water to make a solution, add 30% of the surfactant relative to the mass of bentonite to the pretreated bentonite suspension, stir for 10 minutes, and then place it in a water bath at 90°C After 2 hours of reaction, take it out, place it in a Bourg-style funnel, and rinse it with distilled water several times under a hydraulic suction filter until the filtrate washed out is in the AgNO 3 Titrate until there is no white precipitate, and dry the filter cake obtained by suction filtration in a vacuum oven at 30°C for 60 minutes;

[0041] (3) Put the organically modified bentonite in the ball mill tank of the planetary ball mill and mill for 2 hours. The mass ratio of the ...

Embodiment 3

[0044] (1) Take a certain amount of bentonite, pass it through a 200-mesh sieve, take 5g of the sieved bentonite and disperse it in 100ml of water, stir it on a magnetic stirrer for 0.5h, put it in an ultrasonic instrument for 10min, and make the bentonite fully dispersed in water into a suspension liquid;

[0045] (2) Take 40g of surfactant STAB and add 100ml of distilled water to make a solution, add 25% of surfactant relative to the mass of bentonite to the pretreated bentonite suspension, stir for 5 minutes, and then place in a water bath at 70°C After reacting for 3 hours, take it out, place it in a Buchner funnel, and wash it with distilled water several times under the hydraulic suction filter until the filtrate washed out is in the AgNO 3 Titrate until there is no white precipitate, and dry the filter cake obtained by suction filtration in a vacuum drying oven at 80°C for 30 minutes;

[0046] (3) Put the organically modified bentonite in the ball mill tank of the plan...

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Abstract

The invention relates to a preparation method and application of ball-milling organic modified bentonite for retention and filter aids in papermaking. The preparation method comprises the steps of: dispersing the bentonite in water, stirring and ultrasonically dispersing to form a bentonite suspension; adding octodecyl trimethyl ammonium bromide as a surface active agent into the bentonite suspension, stirring and undergoing a water bath reaction to obtain a reaction liquid; and washing the reaction liquid by utilizing distilled water, carrying out pumping filtration till the filtrate has no white precipitate under the AgNO3 titration, drying the obtained filter cake and carrying out ball-milling to obtain the ball-milling organic modified bentonite. The prepared ball-milling organic modified bentonite has smaller particle size, the particles are basically in submicron to nanometer scale and the size distribution is more uniform; and when the prepared ball-milling organic modified bentonite is cooperated with other retention aids such as cationic polyacrylamide (CPAM), phenolic resin polymer and the like to be applied to paper pulp retention and filter systems, the problems of paper stock molding and shearing can be more effectively solved, the pulp drainage property can be enhanced, the retention effect can be improved, the speed of a paper machine can be enhanced, and therefore, the production efficiency can be increased.

Description

technical field [0001] The invention relates to a paper-making particle retention and drainage aid, in particular to a preparation method and application of a ball-milled organically modified bentonite used in a paper-making retention and drainage system. Background technique [0002] The active ingredient of bentonite is montmorillonite, and the mass content of montmorillonite in bentonite accounts for about 90%. The total proven reserves of bentonite in my country ranks second in the world. Due to the large amount of bentonite and its wide application, Chinese paper workers have used it as a retention and drainage aid in the wet end chemistry of papermaking. With the rise of new multi-particle retention and drainage systems, bentonite is also playing an increasingly important role. Bentonite can not only cooperate with other retention and drainage aids to improve the retention and drainage effect, but also can be used as an effective purifier in the wet end. Its surface c...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D21H21/10C01B33/44
Inventor 陈威李友明万小芳雷利荣陈冬海
Owner SOUTH CHINA UNIV OF TECH
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