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Production technology of transparent iron oxide

A transparent iron oxide, production process technology, applied in the directions of iron oxide, iron oxide/iron hydroxide, nanotechnology, etc., can solve the problems of impure hue, difficult to control the particle size and shape of iron oxide red, poor dispersibility, etc. Pure, good dispersion, not easy to agglomerate effect

Inactive Publication Date: 2019-11-15
YIXING YUXING IND & TRADE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] At present, a lot of research has been done on the preparation methods of nano-iron oxide at home and abroad, which are generally divided into liquid-phase method and solid-phase method. Among them, the liquid-phase method includes air oxidation method, chlorate oxidation method, urea hydrolysis method, forced Hydrolysis, supercritical drying, etc. Solid-phase methods include mechanical pulverization, solid-phase chemical reaction, pyrolysis, etc., but there are problems such as difficulty in controlling the particle size and shape of iron oxide red, poor dispersion, and impure hue.

Method used

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  • Production technology of transparent iron oxide
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  • Production technology of transparent iron oxide

Examples

Experimental program
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Effect test

Embodiment 1

[0048] see figure 1 , take 750mL of ferrous sulfate solution in a 1000mL beaker, add 6.0g of sodium chlorate and 10mL of 98% sulfuric acid, heat and stir, keep the temperature at 80°C for 25min, so that Fe 2+ Oxidized to Fe 3+ The solution gradually changed from light green to brownish red, and mixed solution A was obtained, which was set aside; take 110mL sodium hydroxide solution and dilute it with water, the mass fraction of sodium hydroxide solution is 30%, and mix it with an appropriate amount of crystal form control agent evenly to control the crystal form. Sodium hexametaphosphate is selected as the agent, its function is to control the size and uniformity of the hydrated iron oxide yellow particles α-FeOOH, and avoid the formation of γ-FeOOH mixed crystals when the α-FeOOH particles are formed. If the iron oxide yellow contains γ-FeOOH mixed crystals , the iron oxide yellow powder will have a reddish-dark hue, uneven particle size, and inconsistent particle shape, and...

Embodiment 2

[0051] see figure 1 , take 750mL of ferrous sulfate solution in a 1000mL beaker, add 6.0g of sodium chlorate and 10mL of 98% sulfuric acid, heat and stir, keep the temperature at 75°C for 30min, so that Fe 2+ Oxidized to Fe 3+ The solution gradually changed from light green to brownish red, and mixed solution A was obtained, which was set aside; take 110mL sodium hydroxide solution and dilute it with water, the mass fraction of sodium hydroxide solution is 30%, and mix it with an appropriate amount of crystal form control agent evenly to control the crystal form. Sodium hexametaphosphate was selected as the agent to obtain mixed solution B; mixed solution A and mixed solution B were mixed dropwise and mixed synchronously through a space Y-shaped dropping device, and the dropping time was 35min, while heating while stirring, the heating temperature was 45°C, and control the pH value to 8, continue to heat up to 70°C, the reaction will form a brown-red colloid, that is, FeOH 3...

Embodiment 3

[0053] see figure 1 , take 750mL of ferrous sulfate solution in a 1000mL beaker, add 6.0g of sodium chlorate and 10mL of 98% sulfuric acid, heat and stir, keep the temperature at 80°C for 30min, so that Fe 2+ Oxidized to Fe 3+ The solution gradually changed from light green to brownish red, and mixed solution A was obtained, which was set aside; take 110mL sodium hydroxide solution and dilute it with water, the mass fraction of sodium hydroxide solution is 30%, and mix it with an appropriate amount of crystal form control agent evenly to control the crystal form. Sodium hexametaphosphate was selected as the agent to obtain mixed solution B; mixed solution A and mixed solution B were added dropwise and mixed synchronously through a space Y-shaped dropping device, and the dropping time was not less than 40 minutes. The temperature is 50°C, and the pH value is controlled to be 9, and the temperature continues to rise to 75°C, and the reaction produces a brown-red colloid, namely...

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Abstract

The invention discloses a production technology of transparent iron oxide, and belongs to the technical field of iron oxide red production. The production technology of transparent iron oxide comprises the following steps: adopting ferrous sulfate as a raw material, oxidizing Fe<2+> into Fe<3+>, simultaneously dropwise adding and mixing a solution containing Fe<3+> and a diluted sodium hydroxide solution by using a unique space Y-type drop-by-drop adding device, promoting the micro-mixing of Fe<3+> and OH-by using the impact force between the two added solutions, retaining the impact of the outer edge by the cooperation of centrifugal force and an oblique guide plate to drive the mixed solution to rotate and mix, raising the temperature, performing a sufficient reaction under the action ofa crystal form controlling agent to form a high-quality iron hydroxide colloid, interacting elemental iron with water at a certain temperature to promote the conversion of the iron hydroxide colloidinto transparent iron oxide yellow, performing surface treatment on the transparent iron oxide yellow by a surfactant, then carrying out a series of treatments, and calcining the treated transparent iron oxide yellow to obtain the transparent iron oxide red with uniform particle size distribution, good dispersibility and pure hue.

Description

technical field [0001] The invention relates to the technical field of iron oxide red production, more specifically, to a production process of transparent iron oxide. Background technique [0002] The basic chemical expression of iron oxide is Fe2O3, which exists in many different forms such as a-type iron oxide, and iron oxide in different forms presents different colors. Iron oxide is non-toxic and cheap, and is an important substrate with excellent performance widely used in various fields such as building materials, coatings, and rubber. When the particle size of iron oxide reaches the nanoscale level, the specific surface area and surface energy will increase significantly with the decrease of the particle size, which will highlight the small size effect, especially the visible light wave multi-scattering ability and surface covering power will decrease, while It presents a "transparent" state, and at the same time, many potential physical and chemical properties can ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G49/06B82Y40/00
CPCB82Y40/00C01G49/06
Inventor 单淼陆云飞
Owner YIXING YUXING IND & TRADE
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