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Modification method of titanium dioxide

A technology of titanium dioxide and titanium dioxide slurry, which is applied in chemical instruments and methods, inorganic pigment treatment, dyeing physical treatment, etc., and can solve problems affecting product hue and whiteness of titanium dioxide

Active Publication Date: 2020-05-19
LOMON BILLIONS GRP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The addition of cerium-containing compounds can generally improve the light resistance of titanium dioxide, but at the same time i

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0046] After the titanium dioxide base material is sand-milled to a particle size of 0.3 μm, a slurry is made, introduced into a coating tank, and the concentration of the slurry is controlled to be 300 g / L (based on TiO 2 meter), the pH value was brought to 1, and the temperature was raised to 80°C at the same time.

[0047] Add P in 30min 2 o 5 Calculated, accounting for 1.0% Na by weight of titanium dioxide 2 HPO 4 solution, homogenized for 10 min.

[0048] Add 0.5% Fe(NO 3 ) 3 solution, homogenized for 10 min.

[0049] Adjust the pH of the slurry to 2 with dilute NaOH solution, adjust for 45 minutes, and homogenize for 30 minutes.

[0050] Add 0.2% TiOCl within 30min 2 solution (with TiO 2 count), while adding P 2 o 5 Calculated, accounting for 0.5% of the weight of titanium dioxide (NaPO 3 )6 solution, homogenized for 30min.

[0051] Adjust the pH of the slurry to 8.2 with dilute NaOH solution, adjust for 30 minutes, and homogenize for 20 minutes.

[0052] A...

Embodiment 2

[0055] After the titanium dioxide base material is sand-milled to a particle size of 0.4 μm, a slurry is made and introduced into a coating tank, and the concentration of the slurry is controlled to be 300 g / L (based on TiO 2 gauge), the pH value was brought to 3, and the temperature was raised to 80°C.

[0056] Add P in 30min 2 o 5 Calculated, accounting for 2.0% Na by weight of titanium dioxide 2 HPO 4 solution, homogenized for 10 min.

[0057] Add 1.0% Fe(NO 3 ) 3 solution, homogenized for 10 min.

[0058] Adjust the pH of the slurry to 2 with dilute NaOH solution, adjust for 45 minutes, and homogenize for 30 minutes.

[0059] Add 0.3% TiOCl within 30min 2 solution (with TiO 2 count), while adding P 2 o 5 Calculated, accounting for 0.75% of the weight of titanium dioxide (NaPO 3 ) 6 solution, homogenized for 30min.

[0060] Adjust the pH of the slurry to 8.2 with dilute NaOH solution, adjust for 20 minutes, and homogenize for 20 minutes.

[0061] Add Al withi...

Embodiment 3

[0064] After the titanium dioxide base material is sand-milled to a particle size of 0.35 μm, a slurry is made, introduced into a coating tank, and the concentration of the slurry is controlled to be 300 g / L (based on TiO 2 meter), pH value to 3, while heating to 80°C.

[0065] Add P in 30min 2 o 5 Calculated, accounting for 3.0% Na by weight of titanium dioxide 2 HPO 4 solution, homogenized for 10min

[0066] In 45min, add Fe (NO 3 ) 3 solution, homogenized for 10 min.

[0067] Adjust the pH of the slurry to 2 with dilute NaOH solution, adjust for 45 minutes, and homogenize for 30 minutes.

[0068] Add 0.40% TiOCl within 30min 2 solution (with TiO 2 count), while adding P 2 o 5 Calculated, accounting for 1% of the weight of titanium dioxide (NaPO 3 ) 6 solution, homogenized for 30min.

[0069] Adjust the pH of the slurry to 8.2 with dilute NaOH solution, adjust for 20 minutes, and homogenize for 20 minutes.

[0070] Add Al within 120min 2 o 3 Calculated, acco...

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PUM

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Abstract

The invention discloses a modification method of titanium dioxide. The modification method comprises the following steps: S1, separately adding a first phosphate solution and an iron salt solution totitanium dioxide slurry, and adjusting the pH value of the slurry to 1-3; S2, adding a TiOCl2 solution and second phosphate, and adjusting the pH value of the slurry to 8.0-9.0; S3, adding an aluminumsalt solution and an inorganic acid solution, and keeping the pH value of the slurry at 8.0-9.0; and S4, adjusting the pH value to 7, and carrying out filter pressing, drying and steam pulverizationto obtain modified titanium dioxide. The method is simple, and the prepared titanium dioxide is excellent in application performance in papermaking.

Description

technical field [0001] The invention relates to a modification method of titanium dioxide, which belongs to the field of titanium dioxide preparation. Background technique [0002] Titanium dioxide, also known as titanium dioxide, is considered to be the best white pigment in the world today because of its excellent optical properties. Titanium dioxide has the advantages of small particle size, narrow particle size distribution, good dispersibility, large specific surface area, good whiteness, high refractive index, good light and weather resistance, high chemical stability, etc., so it is widely used in coatings, plastics, papermaking, ink, Chemical fiber and other fields. [0003] According to statistics, the consumption of titanium dioxide in the paper industry accounts for the third place in the output of titanium dioxide. 10%-15% of the global titanium dioxide production is used in the paper industry, of which titanium dioxide for decorative base paper accounts for 11...

Claims

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Application Information

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IPC IPC(8): C09C1/36C09C3/04C09C3/06
CPCC09C1/3661C09C3/006C09C3/041C09C3/043C09C3/063
Inventor 和奔流王莉萍王永珊周文静冯亚阳马艳萍赵姗姗曹青喜豆君
Owner LOMON BILLIONS GRP CO LTD