A method for preparing high-brightness iron red hybrid pigments by using oil shale semi-coke

An oil shale semi-coke and pigment technology, which is applied in the field of nano-inorganic pigment preparation, can solve the problems of affecting the color performance of the pigment, the size of the powder particles is large, and the introduction of other impurities, etc., and achieves bright color, low synthesis temperature, and reduced preparation temperature. Effect

Active Publication Date: 2021-03-02
LANZHOU INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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  • Abstract
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Problems solved by technology

However, its process involves hydrothermal reaction, the preparation process is complicated, and accompanied by the generation of waste water, the production cost is relatively high
The solid-phase method is a traditional process for preparing inorganic pigments, but its preparation cycle is long, and other impurities are easily introduced during the preparation process. The size of the synthesized powder is relatively large, which seriously affects the color performance of the pigment.

Method used

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  • A method for preparing high-brightness iron red hybrid pigments by using oil shale semi-coke
  • A method for preparing high-brightness iron red hybrid pigments by using oil shale semi-coke
  • A method for preparing high-brightness iron red hybrid pigments by using oil shale semi-coke

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Experimental program
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Effect test

Embodiment 1

[0029] Take 0.35 g of semi-coke, 0.381 g of ferric chloride, 0.375 g of aluminum nitrate, and 0.12 g of sodium hydroxide, mix them and put them into an 80mL zirconia grinding jar, add 37g of zirconia balls with a diameter of 2mm, and the ball-to-material ratio is 30; placed in a mill, and ground at 500rpm for 60 minutes to obtain a precursor; calcined the precursor at 700°C for 60 minutes to obtain an iron red hybrid pigment, marked as S-1, which L * , a * , b * See Table 1 for color parameters.

Embodiment 2

[0031] Take 0.25 g of semi-coke, 0.72 g of ferric nitrate, 0.133 g of aluminum chloride, and 0.424 g of sodium carbonate, mix them and put them into a 80 mL zirconia grinding tank, add 31 g of zirconia balls with a diameter of 2 mm, the ball-to-material ratio 20, placed in a mill, and ground at 700 rpm for 30 min to obtain a precursor; the precursor was calcined at 800°C for 30 min to obtain an iron red hybrid pigment. marked S-2, its L * , a * , b * See Table 1 for color parameters.

Embodiment 3

[0033] Take 0.25 g of semi-coke, 0.254 g of ferric chloride, 0.360 g of ferrous nitrate, 0.258 g of potassium aluminum sulfate and 0.250 g of potassium hydroxide, mix them into a 80 mL zirconia grinding jar, add 48 g of 2 mm in diameter Zirconium dioxide balls with a ball-to-material ratio of 35; placed in a mill and ground at 500 rpm for 240 min to obtain a precursor; calcined the precursor at 500°C for 90 min to obtain an iron red hybrid pigment, marked as S -3, its L * , a * , b * See Table 1 for color parameters.

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Abstract

The invention discloses a method for preparing a high-bright iron red hybrid pigment by using oil shale semi-coke. The method comprises the steps that semi-coke, a soluble iron source, an aluminum source and an alkali source are mixed and put into a planetary mill for grinding, the ratio of grinding media to material is controlled to be 10-40, the grinding speed is controlled to be 300-1200 rpm, the grinding time is controlled to be 30-480 min, and a precursor is obtained; then the precursor is calcined at 300-800 DEG C for 30-120 min to obtain the high-bright-red iron red hybrid pigment. Theobtained iron red pigment has good thermal stability, good chemical stability, bright color, uniform particle size distribution and good color rendering, can meet the demands for high-performance ironred pigments in the fields of paint, engineering plastics, anti-corrosion coating and the like, and also provides a new approach for the high-value utilization of oil shale semi-coke solid waste.

Description

technical field [0001] The invention relates to a preparation method of a high-brightness iron red pigment, in particular to a method for preparing a high-brightness iron red hybrid pigment by using oil shale semi-coke as a raw material and adopting mechanochemistry and aluminum doping, which belongs to the preparation of nanometer inorganic pigments technology field. Background technique [0002] Oil shale semi-coke is the solid waste left after shale oil is extracted by dry distillation from oil shale. It is mainly composed of inorganic oxides and residual carbon components. The inorganic oxides mainly include SiO 2 、A1 2 o 3 , CaO, Fe 2 o 3 . At present, the research on oil shale semi-coke solid waste mainly focuses on the utilization of inorganic oxides, such as the extraction of SiO 2 Preparation of white carbon black (CN103395793B), building materials (CN108147736A), synthetic zeolite (CN106241829A) and porous tobermolite (oil shale semi-coke synthesis of porous ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09C1/24C09C3/06C09C3/04
CPCC01P2006/62C01P2006/63C01P2006/64C09C1/24C09C3/006C09C3/041C09C3/043C09C3/06
Inventor 牟斌王爱勤王文波汪琴康玉茹
Owner LANZHOU INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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