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Production method for high-dispersity iron oxide black

A technology of iron oxide black and production method, which is applied in the field of chemical pigments, can solve the problems of poor dispersibility and limit the use range of iron oxide black, and achieve the effects of high tinting strength, expanded use occasions and purposes, and increased dispersibility

Inactive Publication Date: 2015-04-01
章小芳
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Problems solved by technology

However, the existing iron oxide black has poor dispersibility in paint coatings, printing inks, etc., thereby limiting the scope of use of iron oxide black

Method used

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  • Production method for high-dispersity iron oxide black

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Embodiment Construction

[0009] A production method of highly dispersed iron oxide black, which adopts the iron oxide black obtained by the sodium hydroxide oxidation method, directly uses the undried iron oxide black filter cake, and adds hexametaphosphoric acid equivalent to 6% of the iron oxide black filter cake Sodium, 1.5% fatty acid polyethylene glycol ester, 2500rpm high-speed grinding for 10 minutes, take out and dry, add appropriate amount of water and beat for 20 minutes to make a slurry with a concentration of 50%, and add 1,4- Butynediol, 0.3% aluminum nitride, 0.4% vanadium boride, stirred for 25 minutes, and then passed through a colloid mill to refine the particle size to less than 50 μm, and the liquid slurry was heated at a flow rate of 80 kg / hour at 350 ° C Spray drying under hot air flow into granular powder, drying and powdering is the finished product.

[0010] In the present invention, sodium hexametaphosphate and polyethylene glycol fatty acid ester are used as organic and inorg...

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Abstract

A disclosed production method for high-dispersity iron oxide black comprises: preparing iron oxide black by employing a sodium hydroxide oxidation process, adding 4-8% by weight ofsodium hexametaphosphate and 1-2% by weight of fatty acid polyethylene glycol ester, performing high-speed grinding at a speed of 2000-3000 rpm for 10-15 min, taking out and baking, adding proper amount of water and beating for 20-25 min, so as to prepare a slurry with the concentration of 45-55%, adding 2-butyne-1,4-diol accounting for 0.2-0.3% by weight of the slurry, aluminum nitride accounting for 0.2-0.3% by weight of the slurry, and vanadium boride accounting for 0.3-0.4% by weight of the slurry, stirring for 20-30 min, grinding the slurry by a colloid mill to have the particle size less than 50 mu m, baking and beating to form a powder, so as to obtain the finished product. By firstly employing sodium hexametaphosphate and fatty acid polyethylene glycol ester respectively as an organic dispersant and an inorganic dispersant for processing the surface of iron oxide black, the dispersibility of iron oxide black is increased, and the usage occasion and the purposes of iron oxide black are substantially expanded.

Description

technical field [0001] The invention relates to a production method of highly dispersed iron oxide black, which belongs to the field of chemical pigments. 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, red lead, lead chrome yellow and other lead-based and chromium-based toxic inorganic pigments due to their non-toxic, odorless, and non-polluting characteristics. Iron oxide black is widely used in paints and coatings in the construction industry due to its simple chemical composition, non-toxic and pollution-free, and strong chemical stability. However, the existing iron oxide black has poor dispersibility in paints, inks, etc., thereby limiting the scope of use of the iron oxide black. Contents of the invention [00...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09C1/24C09C3/04C09C3/06C09C3/08C09C3/10
Inventor 章小芳
Owner 章小芳
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