Novel surface treatment method of phosphorus, aluminum and zirconium-coated TiO2

A surface treatment, phosphorus aluminum technology, applied in the direction of dyeing physical treatment, inorganic pigment treatment, chemical instruments and methods, etc., can solve the problem of light stability retention rate, dispersion and weather resistance, unreachable coloring effect, high cost, Harmful to health and other issues, to achieve high weather resistance, retention rate guarantee, promote hydrolysis effect

Active Publication Date: 2014-09-10
ANHUI JXTB GRP
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  • Abstract
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  • Claims
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Problems solved by technology

[0007] The purpose of the present invention is to overcome the existence of existing titanium dioxide surface treatment methods: 1) the ability to improve performances such as light stability, hiding power, retention rate, dispersibility, weather resistance, and coloring effect cannot reach printing paper, lamination, etc. 2) The use of cerium salt as a coating material, which is costly and harmful to health, provides a new type of aluminum-phosphorus-zirconium-coated TiO 2 Carry out the method for surface treatment; The present invention uses phosphate, zirconium salt, aluminum salt to TiO 2 Particles are surface-coated, which is low in cost and has no toxic side effects. The lack of cerium salts in weather resistance and other properties can be compensated for through appropriate process optimization. The treated titanium dioxide still has high light stability, hiding power, and retention. rate, dispersibility, weather resistance and coloring effect

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  • Novel surface treatment method of phosphorus, aluminum and zirconium-coated TiO2

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Experimental program
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Embodiment 1

[0032] A new type of phosphorus-aluminum-zirconium-coated TiO in this embodiment 2 The method of surface treatment is to add phosphate in the process of beating and dispersing the crude rutile titanium dioxide, and add phosphate, zirconium salt and aluminum salt to TiO2 in the inorganic surface treatment. 2 particles are surface-coated, compared to other coated TiO 2 The method of surface treatment, the sources of raw and auxiliary materials used in this example are convenient, sufficient, low in cost and low in risk factor. Compared with using expensive cerium salt as coating raw material, although it can increase the weather resistance of titanium dioxide, cerium Salt has a toxic effect on human lungs and is extremely irritating, which will cause breathing difficulties for titanium dioxide production personnel and endanger the health of production personnel, and metal cerium is also extremely harmful to the environment.

[0033] The specific processing steps of this embodimen...

Embodiment 2

[0049] A new type of phosphorus-aluminum-zirconium-coated TiO in this embodiment 2 The method for carrying out surface treatment, its treatment steps are:

[0050] 1) Weigh 800g of crude rutile titanium dioxide and crush it in a crusher, sieve it with a 450μm test sieve, use deionized water to make a slurry with a concentration of 800g / L, and use a high-speed mixer at a speed of 550rpm After stirring for 15 minutes, add sodium hexametaphosphate solution with a concentration of 100g / L, the mass ratio of sodium hexametaphosphate solution to slurry is 5‰, control the pH to 9.5, and carry out grinding and dispersion.

[0051] 2) Disperse the dispersed slurry in step 1) with 8.3m 3 The speed of / h is added to the sand mill for grinding to further reduce the particle size and increase the dispersion.

[0052] 3) Dilute the ground slurry in step 2) to a concentration of 300g / L, raise the temperature to 58°C, and keep it warm until the surface treatment is completed, and the rotatio...

Embodiment 3

[0060] A new type of phosphorus-aluminum-zirconium-coated TiO in this embodiment 2 The method for carrying out surface treatment, its treatment steps are:

[0061] 1) Weigh 900g of crude rutile titanium dioxide and crush it in a crusher, sieve it with a 450μm test sieve, and use deionized water to make a slurry with a concentration of 900g / L of the crude product after sieving, and use a high-speed mixer at a speed of 580rpm After stirring for 20 minutes, add sodium hexametaphosphate solution with a concentration of 120g / L, the mass ratio of sodium hexametaphosphate solution to slurry is 4.5‰, control the pH to 10.5, and carry out grinding and dispersion.

[0062] 2) Disperse the slurry in step 1) with 11m 3 The speed of / h is added to the sand mill for grinding to further reduce the particle size and increase the dispersion.

[0063] 3) Dilute the ground slurry in step 2) to a concentration of 320g / L, raise the temperature to 62°C, and keep it warm until the surface treatmen...

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Abstract

The invention discloses a novel surface treatment method of phosphorus, aluminum and zirconium-coated TiO2, belonging to the technical field of titanium dioxide. The method comprises the following steps: 1) crushing crude rutile titanium dioxide into slurry, adding alkaline phosphorus-containing compound solution, and conducting milling and dispersion; 2) adding the dispersed slurry into a sand mill for milling; 3) diluting and heating the milled slurry; 4) adding an acidic phosphorus-containing compound solution and regulating pH value; 4) adding zirconium salt solution and alkaline solution, regulating the pH value and curing for 1-2h; 6) adding acidic aluminum salt solution, regulating the pH value and curing for 0.5-2h; 7) adding acidic aluminum salt solution and alkaline aluminum salt solution, and regulating the pH value and curing for 1-2h; and 8) adding alkaline solution so that the pH value of the slurry is up to 7.2-7.5, and curing for 1-2h; and 9) conducting organic surface treatment. The titanium dioxide prepared has higher photostability, covering capability, retention, dispersibility, weather resistance and coloring effect.

Description

technical field [0001] The present invention relates to the technical field of titanium dioxide preparation, more specifically, relates to a novel phosphorus-aluminum-zirconium-coated TiO 2 Improve TiO 2 Methods for light stability, hiding power, retention, dispersibility, weather resistance and coloring effects. Background technique [0002] TiO 2 Commonly known as titanium dioxide, it is recognized as one of the best pigments in the world and is widely used in coatings, plastics, papermaking, chemical fibers, food, medicine, daily chemicals and other fields. TiO 2 According to the crystal form, it can be roughly divided into three categories: rutile type, anatase type, and brookite type. Because rutile titanium dioxide has many advantages such as the smallest crystal lattice, non-directional lattice arrangement, and good stability, more than 80% of the titanium dioxide sold in the market is rutile titanium dioxide. [0003] Rutile titanium dioxide is mainly prepared b...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09C1/36C09C3/04C09C3/06
Inventor 张本发韩小刚张进孙和庆张俊文马征程张杰
Owner ANHUI JXTB GRP
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