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A method of sulfuric acid method to remove fe from metatitanic acid in titanium dioxide of decorative base paper 2 o 3 Methods

A technology of decorating base paper and metatitanic acid, applied in chemical instruments and methods, titanium oxide/hydroxide, titanium dioxide, etc., can solve the effects of titanium dioxide whiteness, crystallization of trivalent titanium solution, and foaming of trivalent titanium and other issues to achieve the effect of avoiding disadvantages and potential problems

Active Publication Date: 2019-12-06
HEBEI MILSON TITANIUM DIOXIDE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The sulfuric acid consumption of the currently used aluminum powder reduction bleaching method is about 26-30% (based on TiO in metatitanic acid 2 base), and there is unreacted aluminum powder in metatitanic acid, which will affect the whiteness of titanium dioxide
The trivalent titanium reduction bleaching method can eliminate the disadvantage of incomplete aluminum powder reaction in the aluminum powder reduction method, and the sulfuric acid consumption is about 18-20%, but the preparation of trivalent titanium requires separate equipment and personnel, and there are often operating requirements, often Preparation process of trivalent titanium bubbling and trough, Ti 4+ Problems such as hydrolysis and crystallization during the transportation of trivalent titanium solution

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] Fe removal from metatitanic acid in titanium dioxide of decorative base paper by sulfuric acid method 2 o 3 method, the total amount of metatitanic acid used is 65m 3 , TiO in metatitanic acid 2 The concentration is 385.46g / L, including the following steps:

[0032] A. Add 0.65m to the bleach tank 3 Qualified metatitanic acid after washing with water, stirred, then added concentrated sulfuric acid (H 2 SO 4 98.34%)0.485m 3 , stir, heat preservation at 98-105°C until metatitanic acid dissolves into a clear solution, dilute with water to TiO 2 Concentration is 115.76g / L, obtains titanium sulfate solution;

[0033] B, in titanium sulfate liquid, add aluminum powder (Al98.5%) 38.15kg reaction, to without solid matter;

[0034] C. The remaining 64.35m 3 Metatitanic acid was added to the bleaching tank, diluted and adjusted to a concentration of 210.85g / L (based on TiO 2 meter), after stirring, adding H 2 SO 4 98.34% concentrated sulfuric acid, stir evenly, the am...

Embodiment 2

[0037] Fe removal from metatitanic acid in titanium dioxide of decorative base paper by sulfuric acid method 2 o 3 method, the total amount of metatitanic acid used is 65m 3 , TiO in metatitanic acid 2 The concentration is 368.23g / L, including the following steps:

[0038] A. Add 0.52m to the bleach tank 3 Qualified metatitanic acid after washing with water, stirred, then added concentrated sulfuric acid (H 2 SO 4 98.56%)0.423m 3 , stir, heat preservation at 95-103°C until metatitanic acid dissolves into a clear solution, dilute with water to TiO2 Concentration is 110.98g / L, obtains titanium sulfate solution;

[0039] B, in titanium sulfate liquid, add aluminum powder (Al97.8%) 35.24kg reaction, to without solid matter;

[0040] C. The remaining 64.48m 3 Metatitanic acid was added into the bleaching tank, diluted and adjusted to a concentration of 187.74g / L (based on TiO 2 meter), after stirring, adding H 2 SO 4 98.56% concentrated sulfuric acid, stir evenly, the am...

Embodiment 3

[0043] Fe removal from metatitanic acid in titanium dioxide of decorative base paper by sulfuric acid method 2 o 3 method, the total amount of metatitanic acid used is 64.5m 3 , TiO in metatitanic acid 2 The concentration is 392.57g / L, including the following steps:

[0044] A. Add 0.35m to the bleach tank 3 Qualified metatitanic acid after washing with water, stirred, then added concentrated sulfuric acid (H 2 SO 4 98.06%)0.412m 3 , stirred, heat preservation at 95-105°C until metatitanic acid dissolves into a clear solution, dilute with water to TiO 2 Concentration is 95.82g / L, obtains titanium sulfate solution;

[0045] B, in titanium sulfate solution, add aluminum powder (Al98.2%) 21.0kg reaction, to without solid matter;

[0046] C. The remaining 64.15m 3 Metatitanic acid was added into the bleaching tank, diluted and adjusted to a concentration of 195.26g / L (based on TiO 2 meter), after stirring, adding H 2 SO 4 98.06% concentrated sulfuric acid, stir evenly,...

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Abstract

The invention relates to a method for removing Fe2O3 in metatitanic acid in decorative body paper titanium dioxide with a sulfuric acid process and belongs to the technical field of titanium dioxide by sulfuric acid method. The method comprises steps as follows: A, metatitanic acid with the content of TiO2 being 300-400 g / L after water washing is added to a bleaching tank, wherein the adding amount of metatitanic acid is 0.5%-1.0% of the total mass of metatitanic acid; stirring is performed, then, concentrated sulfuric acid is added, the mixture is stirred, the mixture is subjected to thermalinsulation at the temperature of 90-120 DEG C until metatitanic acid is dissolved into a clear solution, water is added to dilute the solution, and a titanium sulfate solution is obtained; B, aluminumpowder is added to the titanium sulfate solution and stirred, the temperature is heated to 60-80 DEG C, and thermal insulation treatment is performed for 1.5-2.0 h; D, filtration and washing are performed. The method is simple and the content of Fe2O3 in metatitanic acid is reduced to 0.002% or below.

Description

technical field [0001] The invention belongs to the technical field of sulfuric acid method titanium dioxide, and relates to a method for removing Fe from metatitanic acid in titanium dioxide for decorative base paper by sulfuric acid method 2 o 3 Methods. This method is simple, and Fe in metatitanic acid can be 2 o 3 The content is reduced to below 0.002%. Background technique [0002] Decorative base paper titanium dioxide is a kind of rutile titanium dioxide, Fe 2 o 3 It has a great influence on the whiteness of titanium dioxide, if Fe 2 o 3 The content of titanium dioxide exceeds 0.0030%, and the titanium dioxide appears an obvious yellow phase. [0003] Titanium dioxide by sulfuric acid method uses concentrated sulfuric acid to decompose ilmenite to prepare titanium sulfate solution. Titanium sulfate solution is hydrolyzed to generate metatitanic acid, which is then prepared into titanium dioxide through a series of processes. Fe in metatitanic acid 2 o 3 The ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01G23/053
CPCC01G23/0532
Inventor 张建平张川张千张潇
Owner HEBEI MILSON TITANIUM DIOXIDE
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