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Preparation method for inorganic-organic modified attapulgite clay

An attapulgite clay, organic technology, applied in the field of deep processing of non-metallic minerals, can solve the problems of poor suspension and dispersibility of attapulgite clay, achieve excellent pH stability, shear thinning characteristics, good compatibility and Compounding effects

Inactive Publication Date: 2012-10-03
中国科学院兰州化学物理研究所盱眙凹土应用技术研发中心
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Aiming at the deficiencies in the surface modification of the existing attapulgite clay, the purpose of the present invention is to provide a preparation method of inorganic-organic modified attapulgite clay, the purpose of which is to solve the problems of poor suspension and dispersibility of the existing attapulgite clay in my country

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] Example 1: Attapulgite clay with a water content of 35% is extruded by a pair of rollers, and the extruded attapulgite clay is added to an aqueous solution of sodium phosphate under stirring conditions to make attapulgite clay with a mass concentration of 5%. The amount of sodium phosphate added is 1% of the mass of the attapulgite clay ore; the suspension is passed through a 200-mesh sieve to remove impurities, stirred for 1 hour, and cetyltrimethylammonium chloride is added to continue the reaction for 2 hours at 20°C To obtain a slurry, the amount of cetyltrimethylammonium chloride added is 0.05% of the mass of the attapulgite clay dry material; the obtained slurry is centrifugally dehydrated, dried, and pulverized to obtain a double-modified high-viscosity attapulgite clay product. The raw ore viscosity of attapulgite clay is 942mPa.s, after modification by the above process, its viscosity is 2682mPa.s, and the settlement rate is less than 1% after 24 hours.

Embodiment 2

[0018] Example 2: Extrude the attapulgite clay with a water content of 40% through a pair of rollers, and add the extruded attapulgite clay to the sodium pyrophosphate aqueous solution under stirring to make the attapulgite clay with a mass concentration of 10 % of the suspension, the amount of sodium pyrophosphate added is 3% of the mass of the attapulgite clay ore; the suspension is passed through a 200-mesh sieve to remove impurities, stirred for 2 hours, and then cetyl dimethyl benzyl ammonium bromide is added at 40 ° C The reaction was continued for 1.5 h to obtain a slurry, the amount of cetyl dimethyl benzyl ammonium bromide added was 1% of the mass of the attapulgite clay ore; Attapulgite clay products. The raw ore viscosity of attapulgite clay is 942mPa.s, after modification by the above process, its viscosity is 2825mPa.s, and the settlement rate is less than 1% after 24h.

Embodiment 3

[0019] Embodiment 3: the attapulgite clay with a water content of 45% is extruded by a pair of rollers, and in a stirring state, the attapulgite clay after being extruded is added in an aqueous solution of sodium dihydrogen phosphate to make the attapulgite clay with a mass concentration of 15% of the suspension, the amount of sodium dihydrogen phosphate added is 5% of the mass of the attapulgite clay ore; the suspension is passed through a 200 mesh sieve to remove impurities, stirred for 3 hours, and then added didodecyl dimethyl ammonium bromide at 60 Continue to react at ℃ for 2 hours to obtain a slurry. The amount of dodecyldimethylammonium bromide added is 2% of the mass of the attapulgite clay ore; the resulting slurry is centrifugally dehydrated, dried, and pulverized to obtain a double-modified high-viscosity attapulgite Stick clay products. The raw ore viscosity of attapulgite clay is 942mPa.s, after modification by the above process, its viscosity is 2930mPa.s, and t...

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Abstract

The invention discloses a preparation method for inorganic-organic modified attapulgite clay. The preparation method comprises the steps as follows: dissolving phosphate in water while stirring, then adding the preprocessed attapulgite clay to prepare a suspension liquid with the mass concentration of 5 to 20%; enabling the suspension liquid to pass through a 200-mesh sieve so as to remove impurities, reacting for 1 to 3 h at room temperature, then adding a certain amount of cationic surfactant, and continuously reacting for 1 to 2 h at the temperature of 20 to 90 DEG C so as to obtain pulp; and centrifuging, dehydrating, drying and grinding the obtained pulp so as to obtain the inorganic-organic modified attapulgite clay, wherein the addition amount of the phosphate is 1 to 10% of the attapulgite clay by mass, and the addition amount of the cationic surfactant is 0.05 to 5% of the attapulgite clay by mass. According to the preparation method, the process is easy to operate, the obtained inorganic-organic modified attapulgite clay has the characteristics of high viscosity, shear thinning and the like, and the requirements of fine chemical engineering industries, such as coatings, printing inks and cosmetics, on mineral thickeners are satisfied.

Description

technical field [0001] The invention relates to a method for modifying attapulgite clay, in particular to a method for preparing inorganic-organic modified attapulgite clay, which belongs to the field of deep processing of non-metallic ore. Background technique [0002] At present, the thickening, thickening and rheological additives of many fine chemical products are mostly natural polymers or modified natural polymer products such as guar gum, hydroxyethyl cellulose, sodium carboxymethyl cellulose and chitosan Derivatives, etc., but the cost of natural polymer products is relatively high. In recent years, inorganic mineral thickeners have received widespread attention. Bentonite thickening rheological agents have been favored as inorganic mineral thickeners, and have been widely used in many ways to replace natural polymers. However, bentonite has poor electrolyte resistance. With the development of high-end product industries such as coatings, inks, and cosmetics, the r...

Claims

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Application Information

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IPC IPC(8): C01B33/40
Inventor 王爱勤康玉茹王文波汪琴郑易安
Owner 中国科学院兰州化学物理研究所盱眙凹土应用技术研发中心
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