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Method for preparing high thermal-stability clay mineral-iron oxide red hybrid pigment by co-precipitation technology

A clay mineral and co-precipitation technology, which is applied in chemical instruments and methods, inorganic pigment treatment, fibrous fillers, etc., can solve the problems of uneconomical application and harsh experimental conditions, and achieve low price, easy large-scale production, and economical improvement value effect

Active Publication Date: 2018-06-01
LANZHOU INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the experimental conditions of the above research are relatively harsh, and they are hydrothermal conditions, which are not economical from the perspective of application.

Method used

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  • Method for preparing high thermal-stability clay mineral-iron oxide red hybrid pigment by co-precipitation technology
  • Method for preparing high thermal-stability clay mineral-iron oxide red hybrid pigment by co-precipitation technology
  • Method for preparing high thermal-stability clay mineral-iron oxide red hybrid pigment by co-precipitation technology

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] The attapulgite ore is crushed and crushed to 200 mesh. Weigh 10 g and disperse in 100 mL aqueous solution containing 10 g ferric chloride, add 5 mol / L sodium hydroxide drop by drop after fully stirring and sonicating, adjust the pH to about 8, continue to stir and react for 4 h; The solid product was obtained by centrifugation, washed, dried at 105°C until the water content was 10%, and then directly transferred to a muffle furnace for calcination. The heating rate was controlled at 10°C / min, and crystallized at 500°C for 2 h; after calcination, it was crushed The attapulgite-iron red hybrid pigment was obtained through the treatment. The color values ​​L*, a*, and b* of the hybrid pigment are 43.8, 33.9, and 36.0, respectively.

Embodiment 2

[0032]The attapulgite mineral powder is crushed and crushed to 200 mesh. Weigh 10 g and disperse it in 100 mL of aqueous solution containing 5 g of ferrous ammonium sulfate, stir and ultrasonically add 8 mol / L urea drop by drop, adjust the pH to about 10, and continue to stir for 2 h. At the end of the reaction, the solid product was centrifuged and dried directly in an oven at 80 °C until the water content was about 1%, and then transferred to a muffle furnace for calcination at a controlled heating rate of 1 °C / min and crystallized at 400 °C for 1 h. The attapulgite ore-iron red hybrid pigment is obtained by pulverizing after calcining. The color values ​​L*, a*, and b* of the hybrid pigment are 45.1, 21.8, and 25.1, respectively.

Embodiment 3

[0034] Sepiolite ore powder is crushed and crushed to 200 mesh. Weigh 10 g and disperse in 100 mL of aqueous solution containing 20 g of ferrous nitrate, stir and ultrasonically add 6 mol / L hexamethylenetetramine dropwise, adjust the pH to about 10, and continue to stir for 4 h. At the end of the reaction, the solid product was centrifuged. After washing, it was dried in an oven at 80 °C until the water content was about 30%, and then transferred to a muffle furnace for calcination. The heating rate was controlled at 5 °C / min, and crystallization was carried out at 200 °C for 4 h. After calcining, pulverize to obtain sepiolite-iron red hybrid pigment. The color values ​​L*, a*, and b* of the hybrid pigment are 41.6, 32.9, and 35.1, respectively.

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Abstract

The invention discloses a method for preparing high thermal-stability clay mineral-iron oxide red hybrid pigment by a co-precipitation technology. The method comprises the following steps: dispersingnatural clay mineral in an iron salt aqueous solution; fully stirring and performing ultrasonic treatment; adding a precipitant; regulating the pH to 6-10; reacting for 0.5-4h at room temperature to obtain a clay mineral-ferric hydroxide hybrid precursor; centrifuging the precursor, washing, drying and calcining to obtain a series of clay mineral-iron oxide red hybrid pigment. According to the method disclosed by the invention, by adding the clay mineral, the preparation cost of the iron oxide red pigment is effectively reduced, and the agglomeration and size increase of alpha-Fe2O3 nano particles in the follow-up calcination and crystallization process are avoided; the prepared clay mineral-iron oxide red hybrid pigment has bright color and show excellent high-temperature resistance and is far more superior to the general commercial iron oxide red pigment and can meet the needs of high-end fields. Moreover, with a co-precipitation process, the method disclosed by the invention is simple in technology and facilitates large-scale production.

Description

technical field [0001] The invention relates to a preparation method of a clay mineral-iron red hybrid pigment, in particular to a method for preparing a highly thermally stable clay mineral-iron red hybrid pigment by co-precipitation technology, which belongs to the deep processing of natural non-metallic minerals and nanocomposite materials Preparation technology field. Background technique [0002] Pigment is an important element that makes up the colorful world, and it has played a very important role throughout the ages. Pigments can be divided into organic pigments and inorganic pigments. Relatively speaking, inorganic pigments have superior light resistance and high temperature resistance, and are irreplaceable in many fields (Nature 404 (6781) (2000) 980-982). Among many inorganic pigments, red pigments are widely used because of their high visibility. Common red pigments include iron red ( α -Fe 2 o 3 ), cadmium red (CdS•CdSe), mercury red (HgS), lead red (Pb ...

Claims

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Application Information

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IPC IPC(8): C09C1/24C09C3/06
CPCC01P2002/77C01P2004/03C01P2004/64C01P2006/37C01P2006/62C01P2006/63C01P2006/64C09C1/24C09C3/06
Inventor 王爱勤田光燕王文波汪琴牟斌
Owner LANZHOU INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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