Bleaching method of metatitanic acid in titanium dioxide production by sulfuric acid method

A technology of metatitanic acid and titanium dioxide, applied in the direction of titanium dioxide, titanium oxide/hydroxide, etc., can solve the problems of dangerous operation process, increased preparation workload, complicated preparation process, etc. High tinting strength and good dispersibility

Active Publication Date: 2014-02-05
CNMC GUANGXI PGMA
View PDF3 Cites 8 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the preparation of trivalent titanium solution requires additional equipment and increased preparation workload. At the same time, the preparation pro

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Bleaching method of metatitanic acid in titanium dioxide production by sulfuric acid method
  • Bleaching method of metatitanic acid in titanium dioxide production by sulfuric acid method
  • Bleaching method of metatitanic acid in titanium dioxide production by sulfuric acid method

Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0038] Example 1

[0039] Step 1. Add the qualified metatitanic acid and water to the heated enamel reaction pot with stirring. The trace iron impurities of metatitanic acid are Fe 2 O 3 The total content is 0.010%, stir and adjust the metatitanic acid slurry to contain TiO 2 235g / L, then add a certain amount of industrial sulfuric acid to make the sulfuric acid concentration of the metatitanic acid slurry 35g / L, and heat to 40℃ with steam to dissolve ferric hydroxide into ferric sulfate solution;

[0040] Step two, press EDTA-2Na / Fe 3+ The molar ratio is 4:1. Weigh the complexing agent EDTA-2Na and add water to make a solution, add it to the metatitanic acid slurry under stirring, continue heating, keep the temperature at 40℃ for 1.5h, The reaction between ferric sulfate and the complex EDTA-2Na is complete to form the corresponding ferric complex;

[0041] Step 3: Cooling the metatitanic acid slurry after complexation and bleaching to room temperature through cooling water, suction...

Example Embodiment

[0045] Example 2

[0046] Step 1. Add the qualified metatitanic acid and water to the heated enamel reaction pot with stirring. The trace iron impurities of metatitanic acid are Fe 2 O 3 The total content is 0.008%, stir and adjust the metatitanic acid slurry to contain TiO 2 245g / L, then add a certain amount of industrial sulfuric acid to make the sulfuric acid concentration of the metatitanic acid slurry 45g / L, and heat to 45℃ with steam to dissolve ferric hydroxide into ferric sulfate solution;

[0047] Step two, press EDTA-2Na / Fe 3+ The molar ratio is 3:1, weigh the complexing agent EDTA-2Na and add water to make a solution, add it to the metatitanic acid slurry under stirring, continue heating, keep the temperature at 45℃ for 1h, and make the sulfuric acid The high-speed iron and the complex EDTA-2Na react completely to form the corresponding high-speed iron complex;

[0048] Step 3: Cooling the metatitanic acid slurry after complexation and bleaching to room temperature through...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

No PUM Login to view more

Abstract

The invention relates to the production field of titanium dioxide and particularly relates to a bleaching method of metatitanic acid in titanium dioxide production by a sulfuric acid method. The bleaching method comprises the following steps: a step I of adding metatitanic acid which is qualified by water-washing and contains Fe<3+> impurities into a reaction pan, and adding industrial sulfuric acid after adding water and uniformly stirring; a step II of adding EDTA (Ethylene Diamine Tetraacetic Acid)-2Na into the metatitanic acid sizing agent of the step I, and keeping the temperature in the reaction pan between 40 DEG C and 45 DEG C; a step III of cooling the metatitanic acid sizing agent obtained in the step II, vacuum-filtering and water-washing. The invention provides a bleaching method of metatitanic acid in titanium dioxide production by a sulfuric acid method, which is simple in process, easy to realize, little in sulfuric acid dosage, low in operating environment, short in bleaching time, free from residue pollution and good in bleaching effect.

Description

technical field [0001] The invention relates to the production field of titanium dioxide, in particular to a bleaching method for producing metatitanic acid in titanium dioxide by a sulfuric acid method. Background technique [0002] At present, the bleaching methods of metatitanic acid in the production of titanium dioxide by sulfuric acid method mainly include zinc powder bleaching, aluminum powder bleaching, trivalent titanium bleaching, electric bleaching, and in the metatitanic acid slurry, first add ionic surfactant, then add metal A method in which the powder is used as a reducing agent for bleaching. In industry, two methods of aluminum powder bleaching and trivalent titanium bleaching are often used. Among them, the bleaching of trivalent titanium is better, the reason is that compared with zinc powder or aluminum powder bleaching, trivalent titanium solution bleaching has the advantages of less sulfuric acid, less reducing agent, low operating temperature, short b...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
IPC IPC(8): C01G23/04C01G23/08
Inventor 黄桂永王晔军
Owner CNMC GUANGXI PGMA
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap