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Preparation method of rare earth sulfide and/or rare earth oxysulfide colouring agent

A technology of rare earth sulfur oxides and rare earth sulfides, which is applied in the direction of rare earth metal sulfides, rare earth metal compounds, chemical instruments and methods, etc., can solve the problems of cerium sulfide such as unstable color, many impurities, and uneven particle size. Achieve the effect of easy automatic filling, high brightness and good uniformity

Active Publication Date: 2018-11-02
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

However, the color of cerium sulfide obtained by the above method is unstable, with many impurities and uneven particle size.

Method used

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  • Preparation method of rare earth sulfide and/or rare earth oxysulfide colouring agent
  • Preparation method of rare earth sulfide and/or rare earth oxysulfide colouring agent
  • Preparation method of rare earth sulfide and/or rare earth oxysulfide colouring agent

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] The present embodiment provides a kind of method of producing cerium sulfide coloring agent, comprises the steps:

[0038] (1) Take 0.05mol of cerium carbonate, 0.25mol of sulfur, 0.003mol of lithium carbonate, 0.5mol of polyethylene glycol 500 and 0.1mol of ammonium fluoroborate, respectively, and dry them at 115°C for 130min to obtain the raw materials after drying;

[0039] (2) Carry out dry grinding and stirring of each raw material after drying under the condition of 35r / min for 270min, so as to fully mix and evenly obtain the mixed material;

[0040] Put the mixed material into a mold of a certain size and press to form it. Set the pressure value of the press to 10Mpa, the automatic pressure supplement value is 0.3Mpa lower than the set value, and the pressurization speed before contacting the powder is 0.5mm / s , after contacting the powder, the speed of pressurization is 0.2mm / s, and the holding time is 10min. After the pressing work is completed, the pressure is...

Embodiment 2

[0043] The present embodiment provides a kind of method of producing samarium oxysulfide and samarium sulfide mixed coloring agent, comprises the steps:

[0044] (1) Take 0.05mol samarium carbonate, 0.2mol sulfur, 0.015mol sodium carbonate, 0.0005mol methyl cellulose and 0.005mol potassium fluoroborate, respectively, and dry them at 125°C for 110 minutes to obtain the raw materials after drying;

[0045] (2) Add water to each raw material after drying and carry out wet grinding for 240 min under the condition of 45 r / min, so as to fully mix and evenly, and spray dry at 220 ° C to obtain a mixed material;

[0046] Put the mixed material into a mold and press it into a mold, set the pressure value of the press to 20Mpa, the automatic pressure supplement value is 0.3Mpa lower than the set value, and the pressurization speed before contacting the powder is 0.3mm / s. The post-pressurization speed is 0.1mm / s, and the pressure holding time is 0.5min. After the pressing work is complet...

Embodiment 3

[0049] The present embodiment provides a kind of method of producing cerium sulfide coloring agent, comprises the steps:

[0050] (1) Take 0.05mol cerium oxide, 0.2mol sulfur, 0.015mol sodium silicate, 0.02mol hydroxypropyl methylcellulose and 0.01mol sodium fluoroborate, respectively, and dry them at 120°C for 120min to obtain raw materials after drying;

[0051] (2) Add water to each raw material after drying, and carry out wet grinding for 60 minutes under the condition of 40r / min, so that it is fully mixed and uniform, and spray-dried at 210°C to obtain a mixed material; the mixed material is put into a mold and pressed into shape, Set the pressure value of the press to 17Mpa, the automatic pressure supplement value is 0.3Mpa lower than the set value, the pressurization speed before contact with the powder is 0.5mm / s, and the pressurization speed after contact with the powder is 0.2mm / s, The pressure holding time is 4 minutes. After the pressing work is completed, the pre...

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Abstract

The invention relates to a preparation method of a rare earth sulfide and / or rare earth oxysulfide colouring agent. The preparation method comprises following steps: a rare earth compound, sulphur, analkali metal compound, an organic auxiliary agent, and a borate are taken as raw materials, and are subjected to drying; the dried raw materials are mixed fully, and are introduced into a die for pressing moulding so as to obtain a powder cake for calcining, and the rare earth sulfide and / or rare earth oxysulfide colouring agent is obtained at last. The product performance of the rare earth sulfide and / or rare earth oxysulfide colouring agent is stable; the yield is high; the lightness is high; the color degree is stable; the particle size is small; the homogeneity is high; the hardness and the stability of the powder cake are improved; transportation, moving, and storage are convenient; the hardness of the powder cake processed through calcining is higher, it is convenient to take the powder cake from a porcelain jar; automatic filling, automatic sampling, impurity removing, and crushing are convenient to realize, and the particle size of particles obtained through crushing is about0.5 to 5 micrometers.

Description

technical field [0001] The invention relates to the technical field of rare earth sulfide colorants, in particular to a new method for preparing rare earth sulfide and / or rare earth sulfur oxide colorants. Background technique [0002] Because of its excellent coloring performance, non-toxic and harmless properties, rare earth sulfide colorants can replace the currently widely used organic pigments and other colorants that cannot meet environmental protection requirements, and are widely used in toys, printing, textiles, paints, coatings, plastics, etc. in the industry. Rare earth sulfide colorants were included in the "List of Substitutes for Toxic and Harmful Raw Materials Encouraged by the State" jointly promulgated by the Ministry of Science and Technology, the Ministry of Industry and Information Technology, and the Ministry of Environmental Protection in 2016. [0003] A method for preparing rare earth sulfides is provided in the prior art: using rare earth compounds ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01F17/00C09C1/00
CPCC01P2004/03C01P2004/61C01P2004/80C01P2006/62C01P2006/63C01P2006/64C09C1/0081C01F17/288C01F17/294
Inventor 傅继澎李泽宇李成宇王滨董伟池建义张洪杰
Owner BAOTOU RARE EARTH RES & DEV CENT CHINESE ACADEMY OF SCI
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