Preparation method of high-light-resistance low-cost titanium dioxide

A titanium dioxide, low-cost technology, applied in the direction of chemical instruments and methods, fibrous fillers, inorganic pigment treatment, etc., can solve the problem of affecting the color of the product, to save production costs, improve light resistance, improve dispersion and hiding power Effect

Active Publication Date: 2022-02-11
LOMON BILLIONS GRP CO LTD +1
View PDF9 Cites 6 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] In the prior art, there are generally two ways to improve light resistance, namely adding titanium salt or cerium salt, both of which can achieve better light resistance; however, cerium salt itself is yellow, and adding it will affect the hue of the final product

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 high-light-resistance low-cost titanium dioxide

Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0025] The preparation method of high light fastness and low cost titanium dioxide provided by the invention comprises the following steps:

[0026] S1. Take the titanium dioxide-based material slurry, add waste secondary titanium oxychloride, and phosphoric acid or phosphate to the slurry, and homogenize to form a titanium phosphate coating layer;

[0027] S2. Continue to add phosphoric acid or phosphate to the slurry, homogenize, then add coating agent a, homogenize, finally add magnesium salt, homogenize, form a magnesium phosphate coating layer, coating agent a is added with lemon malic acid / malate solution of acid-sodium citrate buffer pair;

[0028] S3. Adjust the pH of the slurry to 7.5-8.5, then add aluminum salt and waste paratitanium oxychloride at the same time, keep the pH of the co-current flow at 7.5-8.5, and homogenize to form an aluminum oxide coating layer.

[0029] The waste para-titanium oxychloride is obtained by spraying the tail gas produced after chlori...

Embodiment 1

[0046] The prepared sand grinding slurry is pumped into the coating tank, and the slurry concentration is adjusted to be 300g / L (in the form of TiO 2 meter), while raising the temperature to 80°C; simultaneously adding 0.6% of the purified waste by-TiOCl 2 Solution (Fe content 3ppm, HCl content 30g / L, TiO 2 content about 50g / L, V content 20ppm) and 1.0% Na 4 P 2 o 7 Solution, after 60 minutes, the pH is 2, homogenized for 30 minutes; add 2.0% H within 30 minutes 3 PO 4 (in P 2 o 5 ) solution, homogenized for 20 minutes; 0.50% malic acid solution was added within 20 minutes, wherein citric acid-sodium citrate buffer pair to maintain the pH of the slurry was added to the malic acid solution, homogenized for 20 minutes; 1.0% MgSO was added within 30 minutes 4 , maintain the pH of the slurry at 5 (according to the 0.1mol / L buffer to adjust the different additions of citric acid and sodium citrate in the solution), homogenize for 30min; adjust the pH to 8.0 with NaOH, and ad...

Embodiment 2

[0048] The prepared sand grinding slurry is pumped into the coating tank, and the slurry concentration is adjusted to be 300g / L (in the form of TiO 2 meter), while raising the temperature to 80°C; simultaneously adding 0.8% of the purified waste by-TiOCl 2 solution and 1.5% Na 4 P 2 o 7 Solution, after 60 minutes, the pH is 2.5, homogenized for 30 minutes; add 2.5% H within 30 minutes 3 PO 4 (in P 2 o 5 ) solution, homogenized for 20 minutes; 0.80% malic acid solution was added within 20 minutes, wherein the malic acid solution was added with citric acid-sodium citrate buffer pair to maintain the pH of the slurry, homogenized for 20 minutes; 1.5% MgSO was added within 30 minutes 4 , maintain the pH of the slurry at 5.5 (according to the 0.1mol / L buffer to adjust the different additions of citric acid and sodium citrate in the solution), homogenize for 30min; adjust the pH to 8.2 with NaOH, and add 2.5% NaAlO in parallel within 90min 2 and purified waste TiOCl 2 , keep ...

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 discloses a preparation method of high-light-resistance low-cost titanium dioxide. The method comprises the following steps: S1, simultaneously adding waste titanium oxychloride and phosphoric acid or phosphate into titanium dioxide-based material slurry, and homogenizing; s2, continuing to add phosphoric acid or phosphate, homogenizing, then adding a coating agent a, homogenizing, finally adding magnesium salt, and homogenizing; and s3, adjusting the pH value of the slurry to 7.5-8.5, then adding alkaline aluminum salt and waste titanium oxychloride at the same time, keeping the parallel flow pH value to 7.5-8.5, and homogenizing. The surface of the titanium dioxide is uniformly coated with the titanium phosphate, the titanium phosphate has good adhesive force, the titanium phosphate adheres to the surface of the titanium dioxide, oxygen is prevented from making contact with the surface of the titanium dioxide, and therefore the light resistance of the product can be improved; then the titanium dioxide is coated with a magnesium phosphate film layer, so that the light resistance of the titanium dioxide can be further improved; the outermost layer is coated with an aluminum oxide film layer, so that the dispersity and covering power of the titanium dioxide are further improved; and the production cost is effectively saved by replacing a conventional titanium source and a pH regulator with waste titanium oxychloride.

Description

technical field [0001] The invention belongs to the technical field of pigment preparation, and in particular relates to a preparation method of titanium dioxide with high light resistance and low cost. Background technique [0002] Titanium dioxide is an important inorganic chemical raw material. Its chemical composition is titanium dioxide, which is non-toxic and harmless to health. It is currently recognized as the best white pigment in the world. Titanium dioxide is a kind of acidic amphoteric oxidation with very stable chemical properties. It has high dielectric constant and excellent semiconductor performance, low relative density, good thermal stability, and low hygroscopicity. In some countries and regions, it has become an important indicator to measure a country's economic development and people's living standards. One of the signs. [0003] In recent years, with the development of the epidemic, my country has introduced many protective policies, especially the re...

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 Applications(China)
IPC IPC(8): C09C1/36C09C3/06
CPCC09C1/3653C09C3/066
Inventor 许刚曹青喜张海涛申庆飞王永珊赵姗姗李瑞瑞王莉萍周文静王欢欢冯亚阳宋运萍郭永阳李晨琦
Owner LOMON BILLIONS GRP 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