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Titanium dioxide with low oil absorption and preparation method of titanium dioxide

A technology of oil absorption and titanium dioxide, which is applied in the field of preparation of titanium dioxide with low oil absorption, can solve the problems such as the preparation method of titanium dioxide with low oil absorption, etc., and achieve the effects of good dispersibility and low oil absorption

Active Publication Date: 2015-09-02
PANZHIHUA IRON & STEEL RES INST OF PANGANG GROUP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, according to the existing relevant literature and patent reports, there is no preparation method for low oil absorption titanium dioxide

Method used

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Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0016] The present invention provides a kind of preparation method of low oil absorption titanium dioxide, and the method comprises the following steps:

[0017] (1) mixing rutile titanium dioxide, water and the first dispersant to obtain a slurry;

[0018] (2) sanding the slurry obtained in step (1), and optionally diluting and heating up the material obtained after sanding;

[0019] (3) mixing the slurry obtained in step (2) with the second dispersant, and then performing the first aging;

[0020] (4) adding sodium metaaluminate solution and acid solution concurrently to the material obtained after the first slaking, and then carrying out the second slaking;

[0021] (5) Adjust the pH value of the material obtained after the second aging to 7-7.8, and then carry out the third aging.

[0022] According to the present invention, in step (1), the function of the first dispersant is to shorten the time and energy required for the rutile titanium dioxide to complete the dispers...

Embodiment approach

[0038]Compared with the prior art, the titanium dioxide prepared by adopting the above technical solution of the present invention has better dispersibility and lower oil absorption. However, the inventors of the present invention have found that the titanium dioxide prepared by the above technical scheme is further organically treated with an organic treatment agent, which can further reduce the oil absorption of the titanium dioxide. Thus, according to a preferred embodiment of the present invention, the method further includes filtering, washing and drying the material obtained after the third slaking in sequence to obtain a solid, and then removing the solid in the presence of an organic treatment agent To crush.

[0039] Wherein, the filtering method is not particularly limited, and the separation of the solid phase and the liquid phase shall be achieved as fully as possible, and details will not be described here. The washing process can adopt conventional operating met...

Embodiment 1

[0045] Take 1000g of rutile titanium dioxide, add a certain amount of water to make a slurry to a concentration of 500g / L, then add 2g of sodium polycarboxylate as a dispersant to obtain a slurry; sand the above dispersed slurry to a slurry The proportion of particles with a particle size of less than 1 μm in the material reaches more than 95%. The material obtained after sand milling is then diluted with water to a concentration of 300g / L, and the temperature is raised to 60°C; then sodium polycarboxylate is added as a dispersant to the material obtained after dilution and heating, and then stirred (stirred) Speed ​​is 300r / min) under the conditions of aging 30min; within 300min simultaneously and flow into 150mL sodium metaaluminate solution (sodium metaaluminate is Al 2 o 3 The amount calculated is the same as that of the material obtained after the above slaking in terms of TiO 2 The weight ratio of the amount used is 1.5:100) and 300mL concentration of 5% by weight of h...

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Abstract

The invention discloses a preparation method of titanium dioxide with low oil absorption. The preparation method comprises the following steps: (1) mixing rutile titanium dioxide, water and a first dispersing agent to obtain slurry; (2) sanding the slurry obtained in the step (1) and optionally diluting and heating the sanded material; (3) mixing the slurry obtained in the step (2) and a second dispersing agent and then performing primary curing; (4) adding a sodium aluminate solution and an acid solution at the same time into the material obtained after primary curing and performing secondary curing; and (5) adjusting the pH value of the material obtained after secondary curing to 7-7.8 and performing third curing. The titanium dioxide with low oil absorption, obtained through the method disclosed by the invention, has the advantages of excellent dispersity and low oil absorption; particularly, the dispersity of the prepared titanium dioxide can reach 5.76-6.5HB and the oil absorption can be reduced to 16.5-18g / 100g so that the prepared titanium dioxide has relatively good fluidity and color contrast property.

Description

technical field [0001] The invention relates to a preparation method of low oil absorption titanium dioxide and the low oil absorption titanium dioxide prepared by the method. Background technique [0002] Titanium dioxide is mainly composed of crystalline titanium dioxide. The refractive index of crystalline titanium dioxide is much higher than that of other inorganic substances, so that titanium dioxide has the strongest covering ability and thus becomes the best white pigment. Titanium dioxide (titanium dioxide) has three crystallizations in nature: brookite, anatase (referred to as A-type) and rutile (Rutile) abbreviated as R-type. The plate titanium type is an unstable crystal type and has no industrial application value. Both the anatase type and the rutile type have stable crystal lattices and are important white pigments and porcelain glazes. [0003] Titanium dioxide has formed a considerable scale of chemical manufacturing industry, and has been widely used as an ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09C1/36C09C3/04C09C3/10C09C3/08C09C3/06
Inventor 李礼徐玉婷杜剑桥吴健春杨仰军刘婵
Owner PANZHIHUA IRON & STEEL RES INST OF PANGANG GROUP
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