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Colorant and preparation method thereof

A coloring agent and compound technology, which is applied in chemical instruments and methods, inorganic pigment treatment, fibrous fillers, etc., can solve the problem of brightness without phosphorus-containing rare earth sulfide colorants and without phosphorus-containing rare earth sulfide colorants and other problems, to achieve the effect of omitting the sewage treatment link, improving the vividness and reducing the production cost

Active Publication Date: 2017-09-12
包头中科世纪科技有限责任公司
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  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

[0007] In summary, there is no report on rare earth sulfide colorants containing phosphorus, which can achieve high vividness without fluorine washing process; there is no report on the use of phosphorus-containing compounds to improve the vividness of rare earth sulfide colorants

Method used

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  • Colorant and preparation method thereof
  • Colorant and preparation method thereof

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preparation example Construction

[0056]

[0057] The preparation method of the coloring agent of the present invention comprises the following steps: mixing a rare earth compound, a sulfur source, a phosphorus compound and an alkali metal compound to obtain a mixture, and reacting the mixture at 700-1500° C. to obtain the coloring agent. The above-mentioned preparation method does not include the fluorine washing treatment process, so the production cost can be saved, the industrial waste liquid can be reduced, and the process flow can be shortened. The order of mixing is not particularly limited. For example, the rare earth compound, the sulfur source and the phosphorus-containing compound are uniformly mixed, and then an alkali metal compound is added as a flux, and the mixture is obtained by uniform mixing. In another example, the rare earth compound, the sulfur source, the phosphorus-containing compound and the alkali metal compound are uniformly mixed together to obtain a mixture.

[0058] In the prep...

Embodiment 1

[0073] Mix 0.75 mol of sublimated sulfur, 0.15 mol of cerium carbonate, 0.0095 mol of anhydrous sodium carbonate and 0.063 mol of ammonium phosphate, and react at 1000°C for 3 hours. The reaction product is ground, washed, and dried to obtain the colorant Ce 0.3 S 0.45 0.063[CePO 4 ]. The chromaticity coordinates are (L*=55, a*=58, b*=40).

Embodiment 2

[0075] Mix 0.5 mol of sublimated sulfur, 0.15 mol of cerium oxide, 0.01125 mol of anhydrous sodium carbonate and 0.0675 mol of ammonium dihydrogen phosphate, and react at 1000°C for 3 hours. The reaction product is ground, washed, and dried to obtain the colorant Ce 0.3 S 0.45 0.0675[CePO 4 ]. The chromaticity coordinates are (L*=55, a*=58, b*=40).

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Abstract

The invention discloses a rare earth sulfide colorant and a preparation method thereof. The chemical formula of the rare earth sulfide colorant is RE2-2xS3-3x.2y[REPO4], wherein RE is one or more of La, Ce, Pr, Nd and Sm, and the ratio of y to x is 0.001-0.65. The invention further discloses application of a phosphorous compound to the improvement of color brightness of the rare earth sulfide colorant.

Description

technical field [0001] The invention relates to a colorant and a preparation method thereof, in particular to a phosphorus-containing rare earth sulfide colorant and a preparation method thereof. The present invention also relates to the use of a phosphorus-containing compound. Background technique [0002] With the enhancement of people's awareness of environmental protection, many countries have issued relevant laws to strictly prohibit the use of toxic pigments containing heavy metals such as lead, cadmium, and mercury. In 2016, my country's Ministry of Industry and Information Technology, Ministry of Science and Technology, and Ministry of Environmental Protection jointly issued the "Catalogue of Substitutes for Toxic and Hazardous Raw Materials (Products) Encouraged by the State", using rare earth sulfides (such as cerium sulfide) as substitutes. [0003] Rare earth sulfides are bright in color, non-toxic, strong in hiding power, and strongly absorb ultraviolet rays. T...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09C1/00C09C3/06
CPCC09C1/00C09C3/06C01P2006/62C01P2006/64C01P2006/63C01P2002/72C01F17/288
Inventor 李成宇张洪杰田磊池建义庞然姜伟王明王滨董开强
Owner 包头中科世纪科技有限责任公司
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