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Black iron oxide pigment and preparation method thereof

A technology of iron oxide black and pigments, applied in the field of pigments, can solve the problems of poor temperature resistance, easy agglomeration, and limited application range of iron oxide black, and achieve the effects of good acid resistance, strong light absorption, and improved application range

Active Publication Date: 2016-11-09
阳山景润陶瓷色料实业有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, iron oxide black belongs to the spinel type with a wide particle size distribution, easy to agglomerate, and poor dispersibility and color performance. When the temperature reaches about 100°C, the color of ordinary iron oxide black will dehydrate and become brownish red. The temperature resistance of iron black is poor, which limits its scope of use, and the highest temperature of some medium-temperature-resistant iron oxide blacks is also around 180°C, which is far from meeting the needs of the market.

Method used

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  • Black iron oxide pigment and preparation method thereof
  • Black iron oxide pigment and preparation method thereof
  • Black iron oxide pigment and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] like figure 1 Shown, the preparation method of high temperature resistant iron oxide black, this preparation method is two stages of oxidative synthesis and high temperature calcination, concrete steps are as follows:

[0024] (1) Oxidative synthesis reaction part

[0025] ① Mixing: Put 100 kg of ferrous sulfate and 100 kg of scraps of iron red and iron yellow into the reaction tank, start stirring and mixing evenly, heat up to 90°C, add 60 kg of manganese sulfate, and then add 30% liquid alkali to adjust the pH When the value is 10, oxidation produces iron oxide black until the material liquid is mature.

[0026] ② Add 5% sodium silicate solution according to the amount of feed solution, react for 10 minutes, measure the pH of the feed solution to 10.0 and react for 30 minutes.

[0027] ③Finally, quickly adjust the pH with dilute sulfuric acid, and pass in air for 1 minute until the pH value stabilizes at 6.0 and react for 30 minutes. After oxidation reaction, the w...

Embodiment 2

[0031] like figure 1 Shown, the preparation method of high temperature-resistant iron oxide black, the preparation method is two stages of oxidation synthesis and high-temperature calcination, the specific steps are as follows:

[0032] (1) Oxidative synthesis reaction part

[0033] ①Mixing: Put 100kg of ferrous sulfate and 100kg of iron sludge scraps into the reaction tank, start stirring and mixing evenly, add 60kg of manganese sulfate, heat up to 90°C, add 30% liquid caustic soda to adjust the pH value to 10, and oxidize to form iron oxide Black until the material liquid is mature.

[0034] ②According to the amount of feed liquid, add 5% sodium silicate solution by mass fraction, react for 10 minutes, measure the pH value as 10.0 and react for 30 minutes.

[0035] ③Finally, quickly adjust the pH with dilute sulfuric acid, and pass in air for 1 minute until the pH value stabilizes at 7.0 and react for 30 minutes. After oxidation reaction, the whole reaction temperature is...

Embodiment 3

[0039] like figure 1 Shown, the preparation method of high temperature resistant iron oxide black, this preparation method is two stages of oxidative synthesis and high temperature calcination, concrete steps are as follows:

[0040] (1) Oxidative synthesis reaction part

[0041] ①Mixing: Put 100kg of ferrous sulfate and 100kg of iron mud scraps into the reaction tank, start stirring and mixing evenly, add 60kg of manganese chloride, heat up to 70°C, add 30% liquid caustic soda to adjust the pH value to 10, and oxidize to form oxidized Iron black until the feed liquid is mature.

[0042] ②According to the amount of feed liquid, add 5% sodium silicate solution by mass fraction, react for 10 minutes, measure the pH value as 10.0 and react for 30 minutes.

[0043] ③Finally, quickly adjust the pH with dilute sulfuric acid, and pass in air for 1 minute until the pH value stabilizes at 8.0 and react for 30 minutes. After oxidation reaction, the whole reaction temperature is 70°C....

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Abstract

The invention discloses a black iron oxide pigment and a preparation method thereof. The method comprises the following steps: (1) a ferrous sulfate raw material and manganese salt are mixed, an alkaline solution is then added to adjust the pH to be 10-11, a heating reaction is performed until a material liquid is sufficiently reacted; (2) a silicate solution is added to the material liquid in the step (1), the temperature is kept at 70-90 DEG C, the pH value is 9-11, a reaction is performed for 30-60 min, the pH value is adjusted to be 6-8, and a thermal-insulation reaction is performed for 30-60 min; (3) a product after the reaction is rinsed, dried, ground and then calcined at a high temperature, and the black iron oxide pigment is obtained. The high-temperature-resistant black iron oxide prepared with the method has the advantages that resistance to temperature of 700 DEG C or higher can be realized, the maximum temperature can exceed 1200 DEG C, and the black iron oxide pigment also has characteristics of quite good acid resistance, alkali resistance, high light-absorbing property and the like, therefore, the application range of black iron oxide is greatly broadened.

Description

technical field [0001] The invention belongs to the technical field of pigments, and relates to a high temperature-resistant iron oxide black pigment and a preparation method thereof. Background technique [0002] Iron-based pigments are important inorganic color pigments, and their annual output ranks first in inorganic color pigments. Due to the strengthening of the world's environmental protection awareness, inorganic iron-based pigments have continuously replaced organic pigments and lead-based and chromium-based toxic inorganic pigments such as red lead and lead chrome yellow due to their non-toxic, odorless, and non-polluting characteristics. Iron oxide pigments are mainly used as fillers in phenolic anti-rust paints and primers for heavy-duty anti-corrosion paints in the construction industry. When used in the coloring of rubber and plastics, it has the effect of strengthening aging and protecting organic matter from being degraded by ultraviolet light. In addition,...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09C1/24C09C1/00C09C3/06C09C3/04
CPCC09C1/00C09C1/24C09C3/006C09C3/043C09C3/063
Inventor 高顺强廖金华冯仕元
Owner 阳山景润陶瓷色料实业有限公司
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