Preparation method of high-viscosity attapulgite-based inorganic gel

An attapulgite and inorganic gel technology, applied in inorganic chemistry, chemical instruments and methods, silicon compounds, etc., can solve problems such as no research reports, and achieve the effects of increasing viscosity, green preparation process, and high suspension stability

Active Publication Date: 2021-05-25
LANZHOU INST OF CHEM PHYSICS CHINESE ACAD OF SCI +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, none of the above-mentioned preparation methods of attapulgite-based inorganic gels involve the modification of the attapulgite suspension with magnesium salt, ammonium salt or phosphate and the subsequent strong Drying and other important processes that affect the performance of gel products. The present invention combines various processes such as acid activation, purification and dissociation, and modification treatment to change the dispersion degree and surface charge of attapulgite rod crystals, and enhance the repulsion between rod crystals. Improve the suspension stability and colloidal properties of the product, and prepare a high-viscosity, high suspension stability and high adaptability attapulgite-based mineral inorganic gel. There is no relevant research report on this technology or process, and no application has been seen. precedent

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  • Preparation method of high-viscosity attapulgite-based inorganic gel

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] (1) 100 kg of natural attapulgite raw ore is crushed to 100 mesh, and the rollers are evenly dispersed to 3 m 3 Sulfuric acid aqueous solution (pH = 3), mechanically stirred for 6 hours to obtain a suspension, followed by three-stage cyclone classification treatment and ultrasonic treatment (ultrasonic treatment power 20KHZ, time 3min) to obtain a suspension after rod crystal beam dissociation treatment ;

[0018] (2) Add 0.5 kg magnesium sulfate solid powder to the suspension after rod crystal beam dissociation treatment, and mechanically stir for 4 hours to obtain a modified suspension;

[0019] (3) Filter the modified suspension through a plate and frame press to obtain a filter cake with a water content of 40%, and then roll the filter cake into 1mm thin slices, and perform a strong drying treatment (drying temperature is 90°C) to obtain an inorganic gel product. labeled APT-Gel-1;

[0020] (4) Disperse 7 g of APT-Gel-1 sample in 93 mL of water, stir at 11,000 rpm...

Embodiment 2

[0022] (1) After crushing 200 kg of natural attapulgite raw ore to 50 mesh and rolling it 3 times, it is evenly dispersed to 3 m 3 Hydrochloric acid aqueous solution (pH = 3), mechanically stirred and reacted for 2 hours to obtain a suspension; then the suspension was subjected to three-stage cyclone classification and ultrasonic treatment (ultrasonic treatment power 20KHZ, treatment time 6min), and rod crystal beam dissociation The treated suspension; (2) Add 2 kg of sodium dihydrogen phosphate solid powder to the suspension after rod crystal beam dissociation treatment, and mechanically stir for 4 hours to obtain a modified suspension;

[0023] (3) The modified suspension is filtered through plate and frame to obtain a filter cake with a water content of 40%, and then the filter cake is rolled into 1mm thin slices, and the inorganic gel product is obtained through strong drying (drying temperature is 100°C). Labeled APT-Gel-2;

[0024] (4) Take 7g of APT-Gel-2 sample and di...

Embodiment 3

[0026] (1) After crushing 200 kg of natural attapulgite raw ore to 100 mesh and rolling it 3 times, it is evenly dispersed to 3 m 3 Phosphoric acid aqueous solution (pH = 3.5), mechanically stirred for 6 hours to obtain a suspension; then the suspension was subjected to three-stage cyclone classification treatment and ultrasonic treatment (ultrasonic treatment power 20KHZ, treatment time 9min), to obtain rod crystal beam dissociation The treated suspension; (2) Add 10 kg of ammonium dihydrogen phosphate solid powder to the suspension after rod crystal beam dissociation treatment, and mechanically stir for 4 hours to obtain a modified suspension;

[0027] (3) The modified suspension is centrifuged to obtain a filter cake with a water content of 40%, and then the filter cake is rolled into a 2mm sheet, and the inorganic gel product is obtained after a strong drying treatment (drying temperature is 110°C), which is marked as APT-Gel-3;

[0028] (4) Disperse 7 g of APT-Gel-3 samp...

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Abstract

The invention discloses a preparation method of high-viscosity attapulgite-based inorganic gel, which comprises the steps of crushing natural attapulgite raw ore, rolling, dispersing into an acidic aqueous solution, activating, and sequentially carrying out rotational flow grading treatment and ultrasonic rod crystal beam dissociation treatment to obtain a suspension after rod crystal beam dissociation; adding inorganic salt into the suspension, and stirring to react to obtain a modified suspension; and obtaining the modified suspension through solid-liquid separation, finally, rolling a filter cake into slices, and drying the slices to obtain an inorganic gel product. According to the method, the attapulgite suspension subjected to acid activation, purification and rod crystal beam dissociation is subjected to inorganic salt modification and the like, so that the modification effect and the viscosity of the gel product are effectively improved, and the attapulgite-based mineral inorganic gel product with excellent suspension stability, viscosity and adaptability is obtained, and can be used as a tackifier and a suspension stabilizer to be applied to the fields of high-end coatings, biomedicine or daily chemicals and the like.

Description

technical field [0001] The invention relates to a preparation method of a mineral inorganic gel, in particular to a preparation method of a high-viscosity attapulgite-based inorganic gel, and belongs to the technical fields of preparation of nanometer mineral functional materials and deep processing of nonmetallic ores. Background technique [0002] As we all know, industries such as coatings, paints, textiles, paper and daily chemicals need to use a large amount of gel additives to improve the viscosity, suspension stability and rheological properties of the product. The traditional thickening products mainly include polyacrylamide, polyvinyl alcohol and polyacrylic acid, etc., and the emerging thickening products mainly include carboxymethyl cellulose, sodium alginate and modified starch. In recent years, the technology and process of using natural clay minerals to prepare inorganic gels has received extensive attention and research, and a series of representative products...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B33/40
CPCC01B33/40C01P2006/22
Inventor 许江王爱勤康玉茹马国超曹一康
Owner LANZHOU INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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