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Preparation method of high-whiteness high-temperature-resistance color masterbatch level titanium dioxide

A technology of high temperature resistance and titanium dioxide, applied in chemical instruments and methods, dyeing physical treatment, dyeing organic silicon compound treatment, etc., can solve the problem of whiteness, dispersibility, hiding power and processing torque of plastic masterbatch system No guarantee, great influence of titanium dioxide inorganic coating, etc., to achieve high yellowing resistance, improved whiteness, and high application performance

Active Publication Date: 2016-11-16
SICHUAN LOMON TITANIUM IND CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Our experiments in the laboratory show that the organic treatment of titanium dioxide for color masterbatch is very important, but the inorganic coating of titanium dioxide also has a great influence. Whiteness, dispersibility, hiding power, and processing torque are not guaranteed

Method used

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  • Preparation method of high-whiteness high-temperature-resistance color masterbatch level titanium dioxide
  • Preparation method of high-whiteness high-temperature-resistance color masterbatch level titanium dioxide

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] (1) Wash the metatitanic acid once, add Ti 3+ Bleaching with sulfuric acid, followed by secondary washing, press filtration after washing to obtain a metatitanic acid filter cake with an iron content of less than 10ppm;

[0029] (2) After beating and dispersing the metatitanic acid filter cake to obtain a slurry with a concentration of 300g / L, carry out combined salt treatment with zinc salt, potassium salt and phosphorus salt, and the addition of zinc sulfate, potassium carbonate and phosphoric acid is 0.05% respectively , 0.35%, 0.3% (based on the mass fraction of titanium dioxide, the addition amount is represented by oxide ZnO, K 2 O, P 2 o 5 mass meter), then calcined at 950° C. to obtain the kiln bottoms with a rutile conversion rate of 94%;

[0030] (3) After the calcined rutile kiln bottoms are prepared by adding water and sodium silicate as a dispersant to prepare a 500g / L slurry, it enters a ball mill for coarse grinding, then enters a sand mill for fine gr...

Embodiment 2

[0035] (1) Wash the metatitanic acid once, add Ti 3+ Bleaching with sulfuric acid, followed by secondary washing, press filtration after washing to obtain a metatitanic acid filter cake with an iron content of less than 10ppm;

[0036] (2) After beating and dispersing the metatitanic acid filter cake to obtain a slurry with a concentration of 200g / L, carry out combined salt treatment with zinc salt, potassium salt and phosphorus salt, and the addition of zinc sulfate, potassium carbonate and phosphoric acid is 0.2% respectively , 0.25%, 0.20% (based on the mass fraction of titanium dioxide, the addition amount is represented by oxide ZnO, K 2 O, P 2 o 5 mass meter), then calcined at 950° C. to obtain the kiln bottoms with a rutile conversion rate of 96%;

[0037] (3) After the calcined rutile kiln bottoms are prepared by adding water and sodium silicate as a dispersant to prepare a 300g / L slurry, it enters a ball mill for coarse grinding, then enters a sand mill for fine gr...

Embodiment 3

[0042] (1) Wash the metatitanic acid once, add Ti 3+ Bleaching with sulfuric acid, followed by secondary washing, press filtration after washing to obtain a metatitanic acid filter cake with an iron content of less than 10ppm;

[0043] (2) After beating and dispersing the metatitanic acid filter cake to obtain a slurry with a concentration of 400g / L, carry out combined salt treatment with zinc salt, potassium salt and phosphorus salt, and the addition of zinc sulfate, potassium carbonate and phosphoric acid is 0.15% respectively , 0.45%, 0.4% (based on the mass fraction of titanium dioxide, the addition amount is represented by oxide ZnO, K 2 O, P 2 o 5 mass meter), then calcined at 950° C. to obtain the kiln bottoms with a rutile conversion rate of 98%;

[0044] (3) After the calcined rutile kiln bottoms are prepared by adding water and sodium silicate as a dispersant to prepare a 700g / L slurry, it enters a ball mill for coarse grinding, then enters a sand mill for fine gr...

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Abstract

The invention discloses a preparation method of high-whiteness high-temperature-resistance color masterbatch level titanium dioxide. Based on a sulfuric acid process production technology, rutile type color masterbatch special titanium dioxide is prepared through the following steps of performing sufficient rinsing, performing washing with water, performing salting, and then performing calcining so as to prepare a rutile base material free from surface treatment, wherein the rutile base material has favorable whiteness and favorable particle fineness; and performing sufficient crushing through wet grinding and sand grinding, then performing inorganic enveloping, and performing flash evaporation and drying, wherein during crushing by gas streams, organic enveloping treatment is performed, so that the high-whiteness high-temperature-resistance color masterbatch level titanium dioxide with low moisture absorption and fine particle size is prepared. The color masterbatch level titanium dioxide prepared by the preparation method disclosed by the invention can notably improve the temperature resistance situations in down-stream enterprises and the application properties of resin, and has a wide market prospect that the color masterbatch level titanium dioxide can be used for different industrial uses and can be used for manufacturing different colorful plastic articles.

Description

technical field [0001] The invention belongs to the technology for producing titanium dioxide by a sulfuric acid method, and in particular relates to a preparation method of the masterbatch-grade titanium dioxide which performs inorganic coating and organic coating on the titanium dioxide to improve the product's better application performance in a plastic color masterbatch system. Background technique [0002] Titanium dioxide has stable physical and chemical properties, and has the best opacity, whiteness and highest brightness. It is an irreplaceable white pigment with the best performance in the world today. It is widely used in coatings, plastics, papermaking, inks, etc. industry. [0003] The production methods of titanium dioxide mainly include sulfuric acid method and chlorination method. Among them, the main raw materials for producing titanium dioxide by sulfuric acid method are ilmenite and sulfuric acid. The basic process includes: preparation of metatitanic aci...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09C1/36C09C3/04C09C3/06C09C3/12
CPCC09C1/363C09C1/3653C09C1/3661C09C1/3684C09C1/3692C09C3/006C09C3/043C09C3/06C09C3/063C09C3/12
Inventor 张玉荣郑丽娟周晓葵周春勇姚恒平
Owner SICHUAN LOMON TITANIUM IND CO LTD
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