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Method for preparing iron oxide yellow with Fe<3+> solution

A technology of iron oxide yellow and iron hydroxide, which is applied in the directions of iron oxide, iron oxide/iron hydroxide, etc., can solve the problem of single source of raw materials, and achieve the effect of simple process and lower production cost.

Active Publication Date: 2012-10-10
SHENZHEN LVLI TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to utilize Fe 3+ After the solution is neutralized and precipitated, it is added to the iron oxide yellow crystal seed to prepare iron oxide yellow. The process is simple and the production cost is low, which solves the problem of single source of raw materials in traditional methods

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] ① Preparation of ferric hydroxide colloid and seed crystals: the concentration is 2.58 mol L -1 Fe 3+ Put 200mL of the solution into a 1L three-necked bottle, dilute to 400mL, add 26% ammonia water to make Fe 3+ Precipitate completely, control the pH value at the end of the reaction to 6.5, and dilute the ferric hydroxide colloid to 800mL after precipitation for 1h; the concentration is 1.78mol L -1 Fe 2+ Add 400mL of the solution into a 1L three-necked bottle, and slowly add a 20% sodium hydroxide solution to make Fe 2+ Precipitation, stirring oxidation reaction by introducing air at room temperature, adding sodium hydroxide to control the pH of the solution to 4-5 during the reaction, and obtaining iron oxide yellow crystal seeds after 20 hours of reaction.

[0018] ② Preparation of iron oxide yellow: According to the reaction initial iron oxide yellow crystal seed concentration is 0.11 mol L in terms of iron -1 , take 50mL of the above-mentioned ferric oxide yell...

Embodiment 2

[0020] ① Preparation of ferric hydroxide colloid and seed crystals: the concentration is 2.58mol L -1 Fe 3+ Put 2000mL of the solution into a 10L three-necked bottle, dilute to 4000mL, add 26% ammonia water to make Fe 3+ Precipitate completely, control the pH value of the reaction end point to 6.6, and obtain ferric hydroxide colloid after 1 hour of precipitation; the concentration is 1.78mol L -1 Fe 2+ Add 4000mL of the solution into a 10L three-necked bottle, and slowly add a 20% sodium hydroxide solution to make Fe 2+ Precipitation, stirring oxidation reaction by introducing air at room temperature, adding sodium hydroxide to control the pH of the solution to 4-5 during the reaction, and obtaining iron oxide yellow crystal seeds after 20 hours of reaction.

[0021] ② Preparation of iron oxide yellow: According to the reaction initial iron oxide yellow crystal seed concentration is 0.11 mol L in terms of iron -1 , take 500mL of the above iron oxide yellow crystal seed an...

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PUM

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Abstract

The invention relates to a method for preparing iron oxide yellow with an Fe<3+> solution, which comprises the following steps: adding alkali into an Fe<3+> solution to convert the Fe<3+> into a ferric hydroxide colloid; adding the generated ferric hydroxide colloid into an iron oxide yellow crystal seed solution; carrying out reaction, wherein the concentration of the iron oxide yellow crystal seeds is controlled at less than 1.5 mol.L<-1> on the basis of ferrum, the mol ratio of the ferric hydroxide colloid to the iron oxide yellow crystal seeds on the basis of ferrum is 0.01:1-5:1, an Fe<2+> solution is added to regulate the concentration of Fe<2+> in the reaction solution to be less than 0.6mol.L<-1>, the reaction temperature is 30-120 DEG C, the reaction time is 2-120 hours, and the pH value of the solution is controlled at 2-6 by adding alkali in the reaction process; and filtering the product, washing, drying, and pulverizing to obtain the acicular iron oxide yellow. By preparing the iron oxide yellow with the Fe<3+> solution, the invention has the advantages of simple technique and wide raw material sources, and lowers the production cost of the iron oxide yellow; and the invention reutilizes the resources, and thus, has environmental benefit and economic benefit.

Description

technical field [0001] The present invention relates to the method for preparing iron oxide yellow, with Fe 3+ Solution preparation of iron oxide yellow belongs to the field of preparation of inorganic powder materials. Background technique [0002] Iron oxide yellow has good weather resistance and light resistance, as well as absorption and shielding effects on ultraviolet rays, so it is widely used in flash paints, inks, leather, transparent plastics, high-end automotive topcoats, food and drug coloring, and art paints. Iron oxide yellow can be calcined at high temperature to produce permein, and has good application prospects in the fields of fine ceramics, high magnetic recording materials, catalysts and bioengineering. [0003] Iron oxide yellow pigment is used as a pigment or colorant in various concrete prefabricated parts and building product materials, and is directly added to cement for application. Iron oxide yellow pigments are suitable for various paint colori...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G49/06
Inventor 郑雅杰滕浩
Owner SHENZHEN LVLI TECH