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A simple and pollution-free process for treating rare earth sulfide pigments

A rare earth sulfide, non-polluting technology, applied in dyeing physical treatment, inorganic pigment treatment, dyeing low-molecular organic compound treatment, etc., can solve problems such as affecting application and poor thermal stability, and achieve easy operation, improved weather resistance, and stability strong effect

Active Publication Date: 2020-07-24
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, untreated rare earth sulfides are easily hydrolyzed in aqueous solution and release hydrogen sulfide gas, and have poor thermal stability in an oxygen environment, decomposing at about 350 °C
This deficiency of rare earth sulfides has seriously affected its application in the field of pigments

Method used

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  • A simple and pollution-free process for treating rare earth sulfide pigments

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Effect test

Embodiment 1

[0026] This embodiment provides a simple and pollution-free process for treating cerium sulfide pigments, including the following steps:

[0027] (1) Take the cerium sulfide, use anhydrous ethanol and water for ultrasonic cleaning twice, and dry at 50°C for 8 hours to obtain a pretreated cerium sulfide with a particle size of 0.8 μm; add 2 times to the pretreated cerium sulfide Quality water, prepare cerium sulfide suspension;

[0028] (2) Add magnesium stearate, basic zinc carbonate and zinc dihydrogen phosphate to the cerium sulfide suspension, and mix them thoroughly to obtain suspension A; the stearate and the pre-treated post-cured The mass ratio of cerium is 1:10, the mass ratio of the basic zinc carbonate and the pretreated cerium sulfide is 1:10, the mass ratio of the zinc dihydrogen phosphate and the pretreated cerium sulfide 1:10;

[0029] (3) After solid-liquid separation of the suspension A, the solid phase was dried at 20° C. for 12 hours to obtain a crude cerium sulfi...

Embodiment 2

[0033] This embodiment provides a simple and pollution-free process for treating cerium sulfide pigments, including the following steps:

[0034] (1) Take the cerium sulfide, use absolute ethanol and water for ultrasonic cleaning 4 times, and dry at 50°C for 8 hours to obtain a pretreated cerium sulfide with a particle size of 1 μm; add 20 times to the pretreated cerium sulfide Quality water, prepare cerium sulfide suspension;

[0035] (2) Add calcium stearate, basic manganese carbonate and manganese dihydrogen phosphate to the cerium sulfide suspension, mix them thoroughly to obtain suspension A; the mass of the calcium stearate and the cerium sulfide The ratio is 1:20, the mass ratio of the basic manganese carbonate to the cerium sulfide is 1:20, and the mass ratio of the manganese dihydrogen phosphate to the cerium sulfide is 1:20;

[0036] (3) After solid-liquid separation of the suspension A, the solid phase was dried at 80°C for 10 hours to obtain a crude cerium sulfide pigmen...

Embodiment 3

[0040] This embodiment provides a simple and pollution-free process for treating cerium sulfide pigments, including the following steps:

[0041] (1) Take the cerium sulfide, use absolute ethanol and water for ultrasonic cleaning three times, and then dry at 50°C for 10 hours to obtain a pretreated cerium sulfide with a particle size of 0.9 μm; add 10 to the pretreated cerium sulfide Double the mass of water to prepare a suspension of cerium sulfide;

[0042] (2) Add zinc stearate, basic calcium carbonate and calcium dihydrogen phosphate to the cerium sulfide suspension, and mix them thoroughly to obtain suspension A; the quality of the zinc stearate and the cerium sulfide The ratio is 1:15, the mass ratio of the basic calcium carbonate to the cerium sulfide is 1:15, and the mass ratio of the calcium dihydrogen phosphate to the cerium sulfide is 1:15;

[0043] (3) After solid-liquid separation of the suspension A, the solid phase was dried at 60°C for 11 hours to obtain a crude ceri...

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Abstract

The invention relates to a simple and pollution-free technology for treating a rare earth sulfide pigment. The technology comprises pretreating a rare earth sulfide, passivating sulfur exposed on thesurface of the pretreated rare earth sulfide through one or more of stearates, basic carbonates and dihydrogen phosphates so that the sulfur is not easily bonded to hydrogen ions in water and does notreact with oxygen in the air, and adding a sodium silicate solution or a tetraethyl orthosilicate solution into a suspension C subjected to pH adjustment so that the absorption spectrum of the treated rare earth sulfide crystal produces blue shift and a transparent silica film coats the surface of the treated earth sulfide. The rare earth sulfide pigment has improved temperature resistance, acidresistance, weather resistance and chroma, has strong stability and is not easily hydrolyzed. The technology has simple processes, is free of high temperature treatment, has no pollution to the environment and effectively solves the problem that the fluorine washing treatment on the rare earth sulfide pollutes the water.

Description

Technical field [0001] The invention relates to the technical field of post-treatment of sulfide pigments, in particular to a simple and pollution-free process for treating rare earth sulfide pigments. Background technique [0002] Red pigments can be divided into two categories: organic red pigments and inorganic red pigments. Organic red pigment has strong coloring power, good dispersibility, bright color, and its application is wide. However, the disadvantages of organic red pigments are poor hiding power, thermal stability and light stability. [0003] Inorganic red pigments have the advantages of good hiding power and high thermal stability and are widely used in many industrial fields. However, most of the inorganic red pigments currently used contain cadmium, lead, mercury and other heavy metal elements that directly endanger human health and the environment. γ-Ce 2 S 3 Pigment has the advantages of non-toxic, environmental protection, high thermal stability, high acid re...

Claims

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Application Information

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IPC IPC(8): C09C1/00C09C3/04C09C3/06C09C3/08
CPCC09C1/00C09C3/006C09C3/04C09C3/063C09C3/08
Inventor 李成宇傅继澎姜伟田磊庞然池建义张洪杰王滨董开强董伟
Owner 包头中科世纪科技有限责任公司
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