Preparation method of pigment titanium dioxide

A titanium dioxide and pigment technology, applied in chemical instruments and methods, inorganic pigment treatment, fibrous fillers, etc., can solve the problems of increasing the solid content of the filter cake and reducing the sintering of titanium dioxide, saving energy consumption and reducing particle sintering. , the effect of reducing natural gas consumption

Active Publication Date: 2020-10-09
CHENGDU ADVANCED METAL MATERIALS IND TECH RES INST CO LTD
View PDF1 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This method prepares high-purity titanium dioxide by adding a depolymerizing agent to depolymerize metatitanic acid and repeatedly washing and removing impurities. However, the depolymerizing agent is hydrophilic, which cannot improve the solid content of the filter cake, loosen the filter cake, and reduce the concentration of titanium dioxide on the filter cake. The purpose of sintering during calcination

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
  • Preparation method of pigment titanium dioxide

Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0018] The invention provides a method for preparing titanium dioxide as a pigment. The method comprises the following steps: a. adding water to metatitanic acid with an iron content of less than 30 ppm for beating to obtain a slurry 1 with a titanium dioxide concentration of 200-450 g / L; b. Add an organic modifier to the slurry 1, then add a treatment agent and stir to obtain a slurry 2; the treatment agent includes potassium salt, phosphoric acid, zinc salt and aluminum salt; b, add an organic modifier to the slurry 1, and then Add a treatment agent and stir to obtain slurry 2; the treatment agent includes potassium salt, phosphoric acid, zinc salt and aluminum salt; the organic modifier is a small molecule with a hydrophilic group and a hydrophobic group or has a hydrophilic The polymer of sexual group and hydrophobic group; c. Squeeze the slurry 2 into a metatitanic acid filter cake, and then obtain the primary product of titanium dioxide through calcination.

[0019] Wher...

Embodiment 1

[0032] Add water to the metatitanic acid with an iron content of less than 30ppm and make a slurry to obtain a slurry 1 with a titanium dioxide concentration of 300g / L; add 0.2wt% sodium stearate to the slurry 1, stir for 30 minutes, and then add a salt treatment agent for hydrogen oxidation Potassium, phosphoric acid and zinc oxide, control the addition amount, make the K in the slurry 2 O / TiO 2 = 0.60%, P 2 o 5 / TiO 2 =0.15%, ZnO / TiO 2 =0.30% (both by weight ratio), stir for 60min to obtain slurry 2; send slurry 2 to a diaphragm filter press for pressing to obtain a metatitanic acid filter cake, detect the water content of the filter cake, and then pass the filter cake through the lower hopper Send it to a rotary kiln for calcination until the rutile-type titanium dioxide content is 98.7% to obtain the primary product of titanium dioxide. Samples are taken at the kiln head to detect the rutile conversion rate, decolorization power, and brightness of the calcined primary pr...

Embodiment 2

[0034] Add water to the metatitanic acid with an iron content of less than 30ppm and make a slurry to obtain a slurry 1 with a titanium dioxide concentration of 200g / L; add 0.5wt% sodium oleate to the slurry 1, stir for 30min, and then add the salt treatment agent potassium hydroxide , phosphoric acid and zinc oxide, control the amount added so that K in the slurry 2 O / TiO 2 = 0.40%, P 2 o 5 / TiO 2 =0.1%, ZnO / TiO 2 = 0.20% (both by weight ratio), stir for 60min to obtain slurry 2; send slurry 2 to a diaphragm filter press for pressing to obtain a metatitanic acid filter cake, detect the water content of the filter cake, and then pass the filter cake through the lower hopper Send it to a rotary kiln for calcination until the rutile-type titanium dioxide content is 99.1% to obtain the primary product of titanium dioxide. Sampling is carried out at the kiln head to detect the rutile conversion rate, decolorization power, and brightness of the calcined primary product, and rec...

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 belongs to the technical field of inorganic chemistry, and more specifically relates to a preparation method of pigment titanium dioxide. The preparation method is capable of solving a problem in the prior art that water content of filter cake obtained through conventional titanium dioxide preparation method is high. The preparation method comprises following steps: a, water is addedinto metatitanic acid with iron content lower than 30ppm for beating so as to obtain a slurry 1 with a titanium dioxide concentration ranging from 200 to 450g / L; b, an organic modifying agent is added into the slurry 1, and a processing agent is added for stirring so as to obtain a slurry 2; c, the slurry 2 is subjected to squeezing so as to obtain a metatitanic acid filter cake, and sintering iscarried out so as to obtain a titanium dioxide product. The solid content of the metatitanic acid filter cake obtained using the preparation is increased from 60% to 70%, and energy consumption needed by dehydration is saved.

Description

technical field [0001] The invention belongs to the technical field of inorganic chemical industry, and in particular relates to a preparation method of pigment titanium dioxide. Background technique [0002] Titanium dioxide is considered to be the best white pigment in the world due to its high refractive index, good whiteness and gloss, and non-toxicity. It is widely used in coatings, plastics, papermaking, ink, chemical fiber, rubber and other fields. [0003] At present, the main production process of titanium dioxide by sulfuric acid method includes the following steps: (1) acidolysis: titanium concentrate or titanium slag is subjected to acidolysis reaction with sulfuric acid to obtain titanyl sulfate solution; (2) hydrolysis: titanyl sulfate solution is hydrolyzed to obtain Metatitanic acid slurry; (3) impurity removal: washing and bleaching the metatitanic acid slurry to obtain water-washed qualified metatitanic acid; (4) salt treatment: washing qualified metatitani...

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
Patent Type & Authority Patents(China)
IPC IPC(8): C09C1/36C09C3/06C09C3/08C09C3/10C09C3/12
CPCC01P2006/60C09C1/3653C09C1/3669C09C1/3676C09C1/3684C09C1/3692
Inventor 刘勇石瑞成吴小平
Owner CHENGDU ADVANCED METAL MATERIALS IND TECH RES INST CO LTD
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