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Preparation method of ferric oxide yellow

A technology of iron oxide yellow and iron glue, applied in the field of pigments, can solve problems such as poor heat resistance

Inactive Publication Date: 2014-03-26
QINGDAO WINCHANCE TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the heat resistance is relatively poor. When heated above 177°C, it loses hydration, and dehydration is accelerated at 270-300°C and turns into iron oxide red.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] A kind of preparation method of iron oxide yellow, the present invention comprises following technological process:

[0018] (1) Remove Mn by "adsorption co-precipitation" method by the by-product of titanium dioxide 2+ and "decomposition method" to remove Ti 4+ The resulting refined vitriol is dubbed Fe 2+ A solution with a concentration of 1.5mol / L;

[0019] (2) At a temperature of 410°C and an oscillation condition of 155r / min, add waste sulfuric acid and oxidant sodium chlorate to the refined green vitriol solution, react for 400 minutes, and Fe 2+ Oxidized to Fe 3+ ;

[0020] (3) At a temperature of 40°C, add C to the ferric solution NaOH =2.0mol / L, v=10ml / min NaOH solution, the shaking speed is 150r / min, and the preparation of colloidal ferric hydroxide is completed;

[0021] (4) Add a high iron solution with a molar ratio of high iron solution:iron glue 10:4 and iron sheet with a mass ratio of iron sheet:iron glue 1:100 to the iron glue, and react for 10 h...

Embodiment 2

[0024] A kind of preparation method of iron oxide yellow, the present invention comprises following technological process:

[0025] (1) Remove Mn by "adsorption co-precipitation" method by the by-product of titanium dioxide 2+ and "decomposition method" to remove Ti 4+ The resulting refined vitriol is dubbed Fe 2+ A solution with a concentration of 1.5mol / L;

[0026] (2) At a temperature of 410°C and an oscillation condition of 160r / min, add waste sulfuric acid and oxidant sodium chlorate to the refined green vitriol solution, react for 400min, and Fe 2+ Oxidized to Fe 3+ ;

[0027] (3) At a temperature of 40°C, add C to the ferric solution NaOH =2.0mol / L, v=10ml / min NaOH solution, the shaking speed is 150r / min, and the preparation of colloidal ferric hydroxide is completed;

[0028] (4) Add a molar ratio of high iron solution:iron glue 7:4 to the iron glue and a mass ratio iron sheet:iron glue 5:100 iron sheet, and react for 15 hours at a temperature of 100°C to comple...

Embodiment 3

[0031] A kind of preparation method of iron oxide yellow, the present invention comprises following technological process:

[0032] (1) Remove Mn by "adsorption co-precipitation" method by the by-product of titanium dioxide 2+ and "decomposition method" to remove Ti 4+ The resulting refined vitriol is dubbed Fe 2+ A solution with a concentration of 1.5mol / L;

[0033] (2) At a temperature of 410°C and an oscillation condition of 165r / min, add waste sulfuric acid and oxidant sodium chlorate to the refined green vitriol solution, react for 400 minutes, and Fe 2+ Oxidized to Fe 3+ ;

[0034] (3) At a temperature of 40°C, add C to the ferric solution NaOH =2.0mol / L, v=10ml / min NaOH solution, the shaking speed is 150r / min, and the preparation of colloidal ferric hydroxide is completed;

[0035] (4) Add a high iron solution with a molar ratio of high iron solution: iron glue 8:4 and an iron sheet with a mass ratio of iron sheet: iron glue 3:100 to the iron glue, and react at a...

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PUM

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Abstract

The invention discloses a preparation method of ferric oxide yellow in the field of pigments. The method comprises the following process steps: (1) preparing refined green vitriol into a solution with the Fe<2+> concentration of 1.5mol / L, wherein the refined green vitriol is obtained after Mn<2+> and Ti<4+> in green vitriol as a side product of titanium dioxide are removed; (2) adding waste sulfuric acid and an oxidizing agent sodium chlorate into the refined green vitriol solution at the temperature of 410-500 DEG C under a vibration condition, reacting for 400min, and oxidizing Fe<2+> to form Fe<3+>; (3) adding an NaOH solution into a solution with high ferrum content at the temperature of 40 DEG C, and vibrating at the speed of 150r / min to finish the preparation of colloid ferric hydroxide; (4) adding the solution with high ferrum content and a ferric sheet into the ferric colloid, and reacting at the temperature of 90-100 DEG C for 10-15h to finish the conversion of the ferric colloid to the ferric oxide yellow; and (5) filtering and drying to finally obtain ferric oxide yellow powder. The preparation method is economic, environmental friendly and high in practical value.

Description

technical field [0001] The invention belongs to the field of pigments, and in particular relates to a preparation method of iron oxide yellow. Background technique [0002] Titanium dioxide (titanium dioxide) is one of the important chemical raw materials at home and abroad. Almost all titanium dioxide is produced by the sulfuric acid method in China. In the production process of sulfuric acid titanium dioxide, according to statistics, every 1t of titanium dioxide will be produced by-product green vitriol (FeSO 4 · 7H 2 0 ) 2.5~4t, waste acid (containing about 20% sulfuric acid) 8~10t, these three wastes have brought serious pollution to the surrounding environment, if not handled properly, will seriously affect the development of titanium dioxide industry. [0003] Iron oxide yellow is also called hydroxyl iron, referred to as iron yellow, and its chemical formula is Fe 2 o 3 · H 2 O or n-FeOOH. Its color varies from lemon to yellow-orange depending on the grain s...

Claims

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Application Information

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IPC IPC(8): C01G49/06
Inventor 苏建丽
Owner QINGDAO WINCHANCE TECH
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