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Method of preparing multicomponent titanium dioxide pigment mainly from wollastonite

A wollastonite and multi-component technology is applied in the field of preparation of multi-component titanium dioxide pigments, which can solve the problems of incomplete coating, low titanium dioxide and incomplete titanium dioxide coating.

Inactive Publication Date: 2019-07-26
大连环球矿产股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] Chinese patent CN89108819.9 discloses a method of using wollastonite to compound titanium dioxide, which is mainly composed of wollastonite, titanium dioxide and coupling agent, etc. poor effect
However, the problems of incomplete coating of titanium dioxide, weak hiding power and low amount of replacement titanium dioxide have not been solved.

Method used

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  • Method of preparing multicomponent titanium dioxide pigment mainly from wollastonite
  • Method of preparing multicomponent titanium dioxide pigment mainly from wollastonite

Examples

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Effect test

Embodiment 1

[0027] A kind of preparation method of the multi-element titanium dioxide pigment with wollastonite as main ingredient, described preparation method comprises the following steps:

[0028] (1) Take industrial-grade quicklime with a CaO content of 91.5%, add water to 14.8 times the quality of quicklime, put it into a reactor for slurrying and disperse it, and age it for 17 hours at a temperature of 110°C to obtain Ca(OH) with a concentration of 12.0%. 2 slurry;

[0029] (2) Get particle size 12 μ m rutile type titanium dioxide, its consumption is 85% of CaO quality, drop in the reactor of step (1);

[0030] (3) Prepare wollastonite with a particle size of 30 μm into an aqueous suspension with a mass fraction of 12%, heat it to 55° C., and add hydrochloric acid with a concentration of 2 mol / L under constant stirring, and control the reaction system to maintain a pH value of 4;

[0031] (4) pump the wollastonite suspension of step (3) into the reactor of step (2), carry out neut...

Embodiment 2

[0038] A kind of preparation method of the multi-element titanium dioxide pigment with wollastonite as main ingredient, described preparation method comprises the following steps:

[0039] (1) Take industrial-grade quicklime with a CaO content of 85%, add water to 10 times the mass of quicklime, put it into a reactor for slurrying and disperse, and age at a temperature of 100°C for 15 hours to obtain a Ca(OH) concentration of 11.55%. 2 slurry;

[0040](2) get particle size 15 μm rutile type titanium dioxide, its consumption is 80% of CaO quality, drop in the reactor of step (1);

[0041] Steps (3)-(9) are the same as in Example 1.

Embodiment 3

[0043] A kind of preparation method of the multi-element titanium dioxide pigment with wollastonite as main ingredient, described preparation method comprises the following steps:

[0044] (1) Take industrial-grade quicklime with a CaO content of 93%, add water to 20 times the mass of quicklime, put it into a reactor for slurrying and disperse it, and age it at a temperature of 120°C for 20 hours to obtain a concentration of 6.23% Ca(OH) 2 slurry;

[0045] (2) get particle size 8 μ m rutile type titanium dioxide, its consumption is 90% of CaO quality, drop in the reactor of step (1);

[0046] Steps (3)-(9) are the same as in Example 1.

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Abstract

The invention relates to a method of preparing multicomponent titanium dioxide pigment mainly from wollastonite and belongs to the field of production of white powdery pigments. The method comprises performing titanium dioxide and lime slaking to obtain binary strong base Ca(OH2) solution, generating calcium titanate with Ca-Ti-O structure through hydrothermal reaction, treating wollastonite CaSiO3 with dilute hydrochloric acid to break Ca-Si-O bonds on its surface, adding into a reactor, allowing TiO2 and CaSiO3 to experience chemical bond reaction under controlled process parameters, and carrying out interfacial reaction via mechanical-chemical effects in a stripping grinder so as to form firm composite particle aggregate.

Description

technical field [0001] The invention relates to a preparation method of a multi-element titanium dioxide pigment with wollastonite as the main material, and belongs to the field of white powder pigment production. Background technique [0002] Pigment-grade titanium dioxide, namely titanium dioxide, as a white pigment, has stable chemical properties and has high whiteness, hiding power, tinting strength, smoothness, and excellent weather resistance and heat resistance. It is currently recognized as the white pigment with the best performance, the widest application range and the absolute advantage in dosage. However, due to the global shortage of titanium ore resources, the manufacturing process is becoming more and more complicated, and the production cost is high, so its application is limited. Problems such as large resource and energy consumption and serious environmental pollution in the production and consumption of titanium dioxide pigments are becoming more and more...

Claims

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Application Information

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IPC IPC(8): C09C1/28C09C1/00C09C3/06C09C3/04
CPCC01P2006/10C01P2006/19C01P2006/60C01P2006/90C09C1/0087C09C1/28C09C3/006C09C3/04C09C3/041C09C3/063
Inventor 张延大黄宝萍顾正
Owner 大连环球矿产股份有限公司
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