Production method of titanium dioxide particles

A titanium dioxide and production method technology, applied in the direction of titanium dioxide, titanium oxide/hydroxide, coating, etc., can solve the problems of slow promotion, high price, single color of pigment, etc., and achieve excellent near-infrared reflection ability, excellent weather resistance, The effect of excellent scattering ability

Active Publication Date: 2014-06-25
JIANGSU TOP FINE NEW RAW MATERIAL CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In order to reduce the absorption of solar radiation energy by colored buildings and so on to achieve energy-saving effects, many varieties of cold pigments have been sold, but these pigments are relatively single in color and expensive, and their promotion is slow
Therefore, the problem of strong absorption of solar radiant energy by colored surfaces exposed to sunlight has not been effectively solved.

Method used

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  • Production method of titanium dioxide particles
  • Production method of titanium dioxide particles

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0015] The index of the prepared titanium solution is: TiO 2 =160.5g / L; F-H 2 SO 4 =103.5g / L; Fe / TiO 2 =0.26, the seed crystal titanium solution is taken according to the proportion volume of 2.0% of the total volume of the hydrolyzed titanium solution, preheated to 80°C, and NaOH is used according to 15.1% of the total titanium content of the seed crystal titanium solution and preheated to 82°C, at 2 Add the preheated titanium solution into the preheated NaOH solution within 1 minute, then raise the temperature to 92°C, stop heating; take 10ml seed crystals to measure the stability, control the stability to 160ml, and the seed crystal preparation is completed; hydrolyze the titanium solution Raise the temperature to 90°C, add the prepared seed crystals, stir for 1 minute, raise the temperature to 102°C at a rate of 0.4-0.6°C / min, keep the temperature until the titanium liquid becomes slightly turbid and stop heating, and press 0.9°C when the temperature drops to 98°C ~1.1°...

Embodiment 2

[0017] The operation process is the same as in Example 1, except that the qualified metatitanic acid is prepared into a slurry with a concentration of 420g / L for salt treatment, and calcined seeds are added in a proportion of 1.5% for salt treatment, and hydrogen is added in a proportion of 0.2%. Potassium oxide, phosphoric acid is added at a rate of 0.15%, and aluminum sulfate is added at a rate of 0.4%. After stirring evenly, filter and dry and calcined, the maximum temperature of calcining is controlled at 1000±10°C.

Embodiment 3

[0019] Operation process is with embodiment 1. The difference is that 2.5% calcined seeds are added in the bleaching process, and the salt treatment is no longer added.

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Abstract

The invention relates to a production method of titanium dioxide particles applied to paint. According to the production method and on the basis of the existing sulfate process titanium dioxide production line, technical indexes and operation methods of processing steps such as titanium liquid index, preparation of seed crystal, normal-pressure hydrolysis, salt treatment, calcining and aftertreatment are regulated and improved and detection and control are also regulated correspondingly, thus obtaining total rutile type titanium dioxide particles more than 60% of which have the particle size being 400 to 1100 nanometers. The titanium dioxide particles produced by the production method disclosed by the invention has an excellent capability of reflecting a near-infrared ray wave part of the sunlight, and products such as the paint and plastic products prepared from the titanium dioxide particles have good cooling and consumption reduction effects.

Description

technical field [0001] The present invention relates to a process for the production of titanium dioxide particles for pigment use. Background technique [0002] Titanium dioxide pigment is the most widely used white pigment. There are two types of crystal products in industrial production, namely anatase type and rutile type. The production process of titanium dioxide pigment mainly includes sulfuric acid method and chlorination method, among which sulfuric acid method is the most widely used production technology in China at present. Titanium dioxide pigment by sulfuric acid method is mainly composed of acid hydrolysis of titanium ore, precipitation of titanium liquid, filtration of titanium liquid, crystallization of titanium liquid, separation of ferrous iron, concentration of titanium liquid, hydrolysis of titanium liquid, washing with metatitanic acid, bleaching of metatitanic acid, secondary treatment of metatitanic acid Washing (rinsing), metatitanate treatment, rot...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G23/047C01G23/053C01G23/08C09D133/00C09D7/12C08K3/22
Inventor 谢宏伟廖向阳王玲倪晓光
Owner JIANGSU TOP FINE NEW RAW MATERIAL CO LTD
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