Preparation method of high-fluidity TiO2 and organic surface treatment mechanism thereof

A high fluidity, surface treatment technology, applied in the direction of dyeing organosilicon compound treatment, inorganic pigment treatment, chemical instruments and methods, etc., can solve problems such as inability to prepare titanium dioxide well, low surface energy, etc., to reduce surface tension. and free energy, high fluidity, easy washing effect

Active Publication Date: 2015-02-18
ANHUI JXTB GRP
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0008] The present invention provides a high fluidity TiO 2 The preparation method and its organic surface treatment mechanism. In the present invention, the inorganic surface coating and the organic surface coating process complement each other and optimize cooperation, so that the surface defects of titanium dioxide particles are reduced, and the particles are round and smooth as a whole; at the same time, the present invention selects in the jet milling stage Add silicone (silicone oil) to TiO 2 Coating with organic surfactants, using the lubricating effect of silicone and low surface energy, to achieve high fluidity on a macro level, which can fully meet the needs of upstream and downstream customers for the flow properties of titanium dioxide

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  • Preparation method of high-fluidity TiO2 and organic surface treatment mechanism thereof
  • Preparation method of high-fluidity TiO2 and organic surface treatment mechanism thereof

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Embodiment 1

[0041] A kind of high fluidity TiO of the present embodiment 2 The preparation method, its steps are:

[0042] Step 1. Crushing and calcining the crude product of rutile titanium dioxide whose seed crystal is aluminum salt, the TiO2 in the crude product 2 The content is more than 99%, the crude product is calcined completely, the impurity content is less, the particle shape is regular, the overall particle size is larger, the surface energy is small, and the force between particles is small, so the macro fluidity is better. Use deionized water with a conductivity of 4μs cm to make a slurry with a concentration of 500g / L, and add 3‰100g / L sodium silicate as a dispersant (the concentration of sodium silicate is SiO 2 meter), the pH of the slurry is controlled to be 9.5, and the slurry is ground and dispersed.

[0043] Step 2, carry out inorganic surface coating treatment to the slurry obtained in step 1, the specific process is:

[0044] 1) Dilute the slurry obtained in step ...

Embodiment 2

[0059] A kind of high fluidity TiO of the present embodiment 2 The organic surface treatment mechanism is basically the same as in Example 1, and this example prepares high fluidity TiO 2 The process is as follows:

[0060] Step 1, after crushing the crude rutile titanium dioxide, make a slurry with a concentration of 550g / L with deionized water with a conductivity of 3.9 μs cm, and add 3.5‰120g / L of sodium hexametaphosphate as a dispersant ( Concentration is calculated as oxide), the pH of the slurry is controlled to be 9.8, and the slurry is ground and dispersed.

[0061] Step 2, carry out inorganic surface coating treatment to the slurry obtained in step 1, the specific process is:

[0062] 1) Dilute the slurry obtained in step 1 to 310g / L, heat up to 55°C, keep warm, and adjust the pH of the slurry to 4.3 with sulfuric acid with a concentration of 15% by mass at a stirring speed of 550rpm.

[0063] 2) Within 1.2h, the zirconium sulfate solution with a concentration of 1...

Embodiment 3

[0072] A kind of high fluidity TiO of the present embodiment 2 The organic surface treatment mechanism is basically the same as in Example 1, and this example prepares high fluidity TiO 2 The process is as follows:

[0073] Step 1. After crushing the crude rutile titanium dioxide, use deionized water with a conductivity of 3.5 μs cm to make a slurry with a concentration of 600 g / L, and add 3.8‰150 g / L of MIPA (isopropanolamine) as Dispersant, control slurry pH to 10, grind and disperse.

[0074] Step 2, carry out inorganic surface coating treatment to the slurry obtained in step 1, the specific process is:

[0075] 1) Dilute the slurry obtained in step 1 to 320g / L, raise the temperature to 65°C, keep it warm, and adjust the pH of the slurry to 4.5 with hydrochloric acid with a mass percentage concentration of 20% under the stirring condition of a rotation speed of 600rpm.

[0076] 2) Within 1.4h, the zirconium sulfate solution with a concentration of 140g / L (concentration i...

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Abstract

The invention discloses a preparation method of high-fluidity TiO2 and an organic surface treatment mechanism thereof and belongs to the technical field of TiO2 preparation. The preparation method comprises the following steps: 1, a titanium dioxide crude product is ground and dispersed; 2, inorganic surface treatment is carried out on slurry; 3, suction filtration and washing are carried out on the slurry by the use of deionized water, and the slurry is dried; 4, a cavity in a high-temperature bag filter is preheated, steam pressure is controlled, and steam is conveyed to the high-temperature bag filter; 5, when temperature in the cavity reaches 200-300 DEG C, steam temperature is controlled to 280-300 DEG C; 6, when temperature in the cavity reaches 140-160 DEG C, thermal insulation is carried out on the high-temperature bag filter; and 7, 40-60% of an organosilicone surface treating agent is added into a jet mill, and the dosage is 0.3-0.5 percent; and simultaneously, feeding is conducted to carry out organic surface treatment. In the stage of jet pulverization, organosilicon (silicone oil) is selected to be added so as to carry out organic surfactant coating on TiO2, and by lubrication effect and low surface energy of organosilicon, high fluidity is achieved at macro level.

Description

technical field [0001] The present invention relates to TiO 2 The field of preparation technology, more specifically, relates to a kind of high fluidity TiO 2 The preparation method and its organic surface treatment mechanism. Background technique [0002] TiO 2 The English name of Titanium Dioxide is the most widely used white pigment. Worldwide, TiO 2 Pigments are mainly used in coatings, plastics, papermaking and other fields. The development of titanium dioxide industry is closely related to the development of the entire national economy. [0003] TiO 2 According to the crystal form, it is roughly divided into rutile type, anatase type and brookite type. Because rutile titanium dioxide has many advantages such as the smallest lattice, non-directional lattice arrangement, and good stability, more than 80% of the titanium dioxide used in the market is rutile titanium dioxide, and the titanium dioxide referred to in the following content is all rutile type Titanium d...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09C1/36C09C3/12C09C3/06
Inventor 韩小刚张进孙和庆曹德宏
Owner ANHUI JXTB GRP
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