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Method for continuously producing rare-earth sulfide coloring agent in large scale

A rare earth sulfide and rare earth compound technology, which is applied in chemical instruments and methods, dyeing low molecular organic compound treatment, dyeing physical treatment, etc. problem, to achieve the effect of low cost, high production efficiency and simple process operation

Inactive Publication Date: 2019-06-25
包头中科世纪科技有限责任公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] However, the synthesis methods of the above-mentioned rare earth sulfide colorants all use hydrogen sulfide or carbon disulfide as the vulcanizing agent to react at high temperature in a tube furnace. Greatly restrict the promotion and use of rare earth sulfide colorants

Method used

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  • Method for continuously producing rare-earth sulfide coloring agent in large scale
  • Method for continuously producing rare-earth sulfide coloring agent in large scale
  • Method for continuously producing rare-earth sulfide coloring agent in large scale

Examples

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Effect test

Embodiment 1

[0033] This embodiment provides a method for continuous large-scale production of cerium sulfide colorant, comprising the following steps:

[0034] (1) Get 0.05mol cerium carbonate, 0.15mol sulfur, 0.003mol lithium carbonate, 0.3mol solid carbon and 0.033mol aluminum fluoride and place them in a crucible, put them into a pusher kiln for reaction, and set the temperature of the pusher kiln to be 800 ℃, high-temperature zone for 2400min roasting reaction, the first product of cerium sulfide colorant is obtained;

[0035] (2) After adding water to the initial product of the sulfide cerium sulfide and cleaning it 3 times, then add 2 times of quality water to prepare a suspension;

[0036] (3) Add magnesium stearate, sodium silicate, zirconium oxychloride, and zinc dihydrogen phosphate to the suspension, mix well and adjust the pH to 2, stir and react at 0°C for 10 hours, and then perform solid-liquid separation. The solid phase is dried at 20°C for 24 hours to obtain the cerium s...

Embodiment 2

[0042] This embodiment provides a method for continuous large-scale production of cerium sulfide colorant, comprising the following steps:

[0043] (1) Take 0.05mol of lanthanum carbonate, 0.35mol of sulfur, 0.015mol of sodium carbonate, 5mol of solid carbon and 0.005mol of sodium fluoride in a crucible, put them into a pusher kiln for reaction, and set the temperature of the pusher kiln to 1500°C , the high-temperature zone was roasted for 20 minutes to obtain the primary product of cerium sulfide colorant;

[0044] (2) After adding water to the initial product of the cerium sulfide colorant and cleaning it 3 times, then add 20 times of quality water to prepare a suspension;

[0045](3) Add calcium stearate, sodium silicate, zirconium oxychloride, and aluminum dihydrogen phosphate to the suspension, mix well and adjust the pH to 12, stir and react at 140°C for 1 hour, and then perform solid-liquid separation. The solid phase was dried at 400° C. for 0.5 h to obtain the ceriu...

Embodiment 3

[0047] This embodiment provides a method for continuous large-scale production of cerium sulfide colorant, comprising the following steps:

[0048] (1) Get 0.05mol cerium oxide, 0.2mol sulfur, 0.015mol lithium carbonate, 2mol solid carbon and 0.01mol ammonium fluoride to be placed in the crucible, put into the pusher kiln and react, the temperature of the pusher kiln is set to 1000°C, 1200min roasting reaction in the high temperature zone to obtain the primary product of cerium sulfide colorant;

[0049] (2) After adding water to the initial product of the cerium sulfide colorant and cleaning it 3 times, then adding 10 times the quality of water to prepare a suspension;

[0050] (3) Add calcium stearate, sodium silicate, zirconium silicate, and boron dihydrogen phosphate to the suspension, mix well and adjust the pH to 8, stir and react at 80°C for 6 hours, and then perform solid-liquid separation. The solid phase is dried at 60°C for 5 hours to obtain the cerium sulfide colo...

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Abstract

The invention relates to a method for continuously producing a rare-earth sulfide coloring agent in a large scale. The method comprises the following steps: firstly, adopting a rare-earth compound, sulfur, an alkali metal compound, solid carbon and a fluoride in a suitable weight ratio for roasting reaction at 800-1500 DEG C to prepare a rare-earth sulfide coloring agent primary product; then adding one or more of stearate, phosphate, oxalate, an aluminum salt, silicate, a zirconium source and ammonia water into the rare-earth sulfide coloring agent primary product for washing for several hours, and performing spray drying to finally prepare the rare-earth sulfide coloring agent; the product performance of the finally prepared rare-earth sulfide coloring agent is stable, and the temperature resistance, the acid resistance, the weather resistance and the chromaticity are obviously improved. The method disclosed by the invention has the advantages that the operation is simple, the cost is low, poisonous and harmful gases such as hydrogen sulfide and carbon sulfide are not used in the production process, and the production efficiency is high.

Description

technical field [0001] The invention relates to the technical field of rare earth sulfide colorants, in particular to a method for continuous and large-scale production of rare earth sulfide colorants. Background technique [0002] Because of its excellent coloring performance, non-toxic and harmless characteristics, rare earth sulfide colorants can replace the currently widely used organic pigments and pigments and other colorants that cannot meet environmental protection requirements. Rare earth sulfide colorants are listed by the Ministry of Science and Technology and the Ministry of Industry and Information Technology and In 2016, the Ministry of Environmental Protection jointly promulgated the "List of Alternatives to Toxic and Hazardous Raw Material Products Encouraged by the State". [0003] Inner Mongolia University of Science and Technology uses a rare earth salt solution to react with a vulcanizing reagent to prepare a rare earth sulfide precursor, and then passes ...

Claims

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Application Information

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IPC IPC(8): C09C1/00C09C3/04C09C3/06C09C3/08
Inventor 田磊李成宇傅继澎董伟池建义张洪杰庞然王滨董开强
Owner 包头中科世纪科技有限责任公司
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