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Rare earth red pigment and preparation method thereof

A red pigment and rare earth technology, applied in fibrous fillers and other directions, can solve the problems of color loss, increased deterioration, instability, etc., and achieve the effects of low equipment requirements, easy industrial production, and simple and easy process.

Active Publication Date: 2020-12-11
BAOTOU RARE EARTH RES & DEV CENT CHINESE ACADEMY OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

These pigments are unstable when exposed to air for a long time, and the deterioration is aggravated by high temperature and high humidity, which eventually leads to color loss

Method used

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  • Rare earth red pigment and preparation method thereof
  • Rare earth red pigment and preparation method thereof
  • Rare earth red pigment and preparation method thereof

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preparation example Construction

[0028] The embodiment of the present invention also relates to the preparation method of the above-mentioned rare earth red pigment, comprising the following steps:

[0029] (1) dissolving the soluble rare earth salt, soluble iron salt and soluble aluminum salt in water, adding a precipitating agent under stirring conditions, and standing still after stirring to obtain a suspension;

[0030] In one embodiment of the present invention, the stirring reaction time is 10-30 minutes, and the standing time is 1-3 hours. In order to completely precipitate the ions in the soluble metal salt, an excess amount of precipitant should be added in this step.

[0031] (2) solid-liquid separation is carried out to the suspension, and the solid phase is washed and dried to obtain a precipitate;

[0032] In one embodiment of the present invention, after the suspension is suction-filtered under reduced pressure, the obtained solid phase is washed with deionized water, ethanol, and deionized wat...

Embodiment 1

[0036] A red pigment doped with rare earth ions. The raw materials include, by weight, 5 parts of cerium nitrate, 30 parts of iron nitrate, 10 parts of aluminum nitrate and 30 parts of sodium hydroxide.

[0037] The rare earth red pigment is prepared by a liquid phase method, which specifically includes the following steps:

[0038] (1) dissolving cerium nitrate, ferric nitrate and aluminum nitrate in water, adding sodium hydroxide under stirring condition, stirring and reacting for 15 minutes and then standing for 2 hours to obtain a suspension;

[0039] (2) After the suspension is filtered under reduced pressure, the obtained solid phase is washed with deionized water, ethanol, and deionized water successively, and then vacuum-dried and ground to obtain a precipitate;

[0040] (3) calcining the precipitate at 800° C. for 60 min to obtain the rare earth red pigment.

[0041] The raw material components and calcination conditions in Examples 2-4 and Comparative Example were c...

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Abstract

The invention provides a rare earth red pigment. Compared with cadmium red and lead red on the market, the rare earth red pigment provided by the invention does not contain highly toxic cadmium and lead ions, and is harmless and pollution-free to human bodies and the environment. Compared with iron oxide red, the red degree value of the pigment is improved, the chromaticity can be adjusted throughthe doping amount of rare earth ions, and a series of red pigments from dark red to bright red can be obtained. The invention also provides a preparation method of the rare earth red pigment, which comprises the following steps: carrying out liquid-phase precipitation reaction on a soluble rare earth salt, a soluble iron salt, a soluble aluminum salt and a precipitant, and calcining the precipitate. The process is simple and feasible, the reaction conditions are controllable, the requirement on equipment in the large-scale production process is low, and industrial production is easy to realize.

Description

technical field [0001] The invention relates to the technical field of inorganic pigments, in particular to a rare earth red pigment and a preparation method of the rare earth red pigment. Background technique [0002] Pigments can be divided into organic pigments and inorganic pigments according to their composition. Organic pigments are bright in color, but poor in stability, so it is difficult to be applied to harsh environments such as long-lasting use, thus limiting its application. Inorganic pigments are widely used in coatings, plastics and ceramics due to their excellent stability, acid and alkali resistance and weather resistance. Among the inorganic pigments, the pigments that are difficult to synthesize are red pigments. At present, the industrial commercial inorganic red pigments are lead red, cadmium red and iron oxide red. However, lead red and cadmium red are directly harmful to human health, and are prohibited by law from being used in the environment and d...

Claims

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Application Information

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IPC IPC(8): C09C1/00
CPCC01P2002/50C01P2006/62C01P2006/63C01P2006/64C09C1/00
Inventor 解舒博李本龙王文村池建义高乐乐
Owner BAOTOU RARE EARTH RES & DEV CENT CHINESE ACADEMY OF SCI
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