Titania coating kaolinite compound powder and method for preparing same

A composite powder and kaolin technology, applied in chemical instruments and methods, inorganic pigment treatment, fibrous fillers, etc., can solve the problems of weak binding force between titanium oxide and kaolin, large final powder particles, etc., and achieve a small particle size distribution range. , The effect of uniform whiteness and cost reduction

Inactive Publication Date: 2008-08-27
中国高岭土有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide a titanium oxide-coated kaolin composite powder and its preparation method, which solves the problem of weak bonding between titanium oxide and kaolin existing in the preparation of titanium oxide-coated kaolin composite powder by the existing dry method. The problem that the final powder particles are too large

Method used

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  • Titania coating kaolinite compound powder and method for preparing same
  • Titania coating kaolinite compound powder and method for preparing same
  • Titania coating kaolinite compound powder and method for preparing same

Examples

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Effect test

Embodiment 1

[0040] Example 1: A preparation method of titanium oxide-coated kaolin composite powder

[0041] According to attached figure 1 Shown preparation method flowchart, the raw material formula that adopts is made up of following composition:

[0042] Titanium sulfate: 17Kg;

[0043] Kaolin: 8Kg;

[0044] Urea: 15Kg;

[0045] Sodium hexametaphosphate: 0.25Kg;

[0046] Starch: 1.1Kg;

[0047] Potassium carbonate: 0.07Kg;

[0048] Phosphoric acid: 0.04Kg;

[0049] Water: 58.5Kg.

[0050](1) Coating reaction: Add kaolin, urea, sodium hexametaphosphate and water into the reaction vessel, stir and mix evenly, and then heat it, during which a small amount of bubbles are generated. When the solution is heated to 70°C to 90°C, evenly add the titanium sulfate solution, and stir well, so that the metatitanic acid precipitate generated by the titanium sulfate evenly covers the surface of the kaolin. The titanium sulfate solution must be heated to 70°C to 90°C to avoid hydrolysis reac...

Embodiment 2

[0065] Example 2: A preparation method of titanium oxide-coated kaolin composite powder

[0066] According to attached figure 1 Shown preparation method flowchart, the raw material formula that adopts is made up of following composition:

[0067] Titanium sulfate: 13Kg;

[0068] Kaolin: 7Kg;

[0069] Urea: 11Kg;

[0070] Sodium hexametaphosphate: 0.17Kg;

[0071] Starch: 0.55Kg;

[0072] Sodium carbonate: 0.04Kg;

[0073] Phosphoric acid: 0.015Kg;

[0074] Water: 68.2Kg.

[0075] The preparation method is the same as in Example 1.

Embodiment 3

[0076] Example 3: A preparation method of titanium oxide-coated kaolin composite powder

[0077] According to attached figure 1 Shown preparation method flowchart, the raw material formula that adopts is made up of following composition:

[0078] Titanium sulfate: 15Kg;

[0079] Kaolin: 7Kg;

[0080] Urea: 13Kg;

[0081] Sodium hexametaphosphate: 0.2Kg;

[0082] Starch: 0.9Kg;

[0083] Ammonium carbonate: 0.06Kg;

[0084] Phosphoric acid: 0.03Kg;

[0085] Water: 63.8Kg.

[0086] The preparation method is the same as in Example 1.

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Abstract

Titanium oxide coating kaolin composite powder belongs to a process for producing composite white pigment powder through the inorganic treatment method. The raw material formulation is formed by following components with percentage by weight: 12%-18% titanium sulfate, 6%-9% kaolin, 10%-19% carbamide, 0.15%-0.30% sodium hexametaphosphate, 0.5%-1.2% starch, 0.04%-0.08% water-soluble carbonate, 0.01%-0.05% phosphorus acid and rest amount of water. The preparation process comprises the steps of coating reacting, water scouring, salt treatment, acid treatment, dispersion, drying and calcination. The titanium oxide coating kaolin composite powder which is prepared through adopting the homogenous precipitation method has the advantages of even whiteness and small particle size distribution range, and each index all approximates to the index of titanium white powder.

Description

technical field [0001] The invention relates to a method for producing composite white pigment powder by an inorganic treatment method, in particular to a titanium oxide-coated kaolin composite powder and a preparation method thereof. Background technique [0002] Titanium dioxide is a white pigment with excellent heat resistance, weather resistance, chemical stability, easy dispersion and good hiding power. With the merger and reorganization of the titanium dioxide industry, the high concentration and monopoly of titanium dioxide production, and the shortage of titanium ore resources, the production capacity of titanium dioxide is greatly restricted. Today, with the accelerated progress of society, the demand for titanium dioxide in coatings, plastics, paper, cosmetics and other industries is also increasing. These factors lead to the shortage of titanium dioxide, which keeps the price of titanium dioxide high. Therefore, the concept of using cheap materials such as kaoli...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09C1/28C09C3/06
Inventor 李勇申益兰周竹发吴龙陈丽昆张忠飞朱明秀
Owner 中国高岭土有限公司
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