Titanium sesquioxide and preparation process and application thereof

A technology of titanium dioxide and preparation process, applied in the direction of titanium oxide/hydroxide, low-value oxide of titanium, etc., can solve the problems of high consumption of raw material hydrogen, long reaction time, high raw material cost, and reach a large market Prospect and application value, low requirements for production equipment and production environment, and the effect of shortening the production process

Active Publication Date: 2017-06-13
山东临港智能制造产业园有限公司
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Problems solved by technology

[0003] At present, there are mainly the following methods for preparing titanium dioxide: (1) heating titanium powder and titanium dioxide mixture at 1600°C in vacuum, which requires high equipment and relatively high raw material costs; (2) preparing titanium dioxide by hydrogen reduction at 1500°C , the reaction time of this method is long; (3) adopt TiO 2 TiCl 4 H 2 Gas reaction, the reaction time of this method needs 4~5h, the raw material hydrogen consumption is high, and the cost is high

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  • Titanium sesquioxide and preparation process and application thereof
  • Titanium sesquioxide and preparation process and application thereof
  • Titanium sesquioxide and preparation process and application thereof

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preparation example Construction

[0029] The preparation technology of titanium dioxide of the present invention comprises the following steps:

[0030] a. Mix titanium dioxide and silicon powder according to the weight ratio of 1:0.25 to 0.5, and shape them to obtain molding materials; wherein, titanium dioxide and silicon powder are preferably high-purity titanium dioxide and high-purity silicon powder, and are preferably in a weight ratio of 1:0.25~ 0.4 mixing, more preferably mixing at a weight ratio of 1:0.3; making the mixed powder into a molding material can increase the reaction contact area between silicon powder and titanium dioxide and improve the reaction kinetics conditions;

[0031] b. Evenly cover the surface of the molding material obtained in step a with silicon powder, heat it to 1400-1500°C in an air atmosphere, keep it warm for 5-25 minutes, cool, and ball mill to obtain a reduced product; the role of the silicon powder covering is to insulate The effect of air prevents the product from bei...

Embodiment 1

[0046] Take 100g TiO 2 , 25g silicon powder (TiO 2 The particle size of silicon powder and silicon powder are all less than 10 μm, and the impurity content is all less than 1wt%), mix uniformly and press into a block, put the mixture block into a crucible, and evenly cover the surface of the material with silicon powder (silicon powder thickness 0.5cm), Then put it into a high-temperature furnace, and reduce it at a reduction temperature of 1450°C for 20 minutes in an air atmosphere. After the reduction time is reached, quickly take out the crucible and pour the material into graphite powder for protection, cool to room temperature, and ball mill the reduction product. The obtained intermediate product is silicon-silicon dioxide-titanium trioxide composite material; alkali leaching is carried out on the material after ball milling with sodium hydroxide, the leaching temperature is 90°C, the leaching time is 120min, the solid-liquid ratio is 1:9g / mL, hydrogen The concentration...

Embodiment 2

[0050] Take 100g TiO 2 , 40g silicon powder (TiO 2 The particle size of silicon powder and silicon powder are all less than 10 μm, and the impurity content is all less than 1wt%), mix uniformly and press into a block, put the mixture block into a crucible, and evenly cover the surface of the material with silicon powder (silicon powder thickness 0.5cm), Then put it into a high-temperature furnace, and reduce it at a reduction temperature of 1430°C for 25 minutes in an air atmosphere. After the reduction time is reached, quickly take out the crucible and pour the material into graphite powder for protection, cool to room temperature, and ball mill the reduction product. The obtained intermediate product is silicon-silicon dioxide-titanium trioxide composite material; alkali leaching is carried out on the material after ball milling with sodium hydroxide, the leaching temperature is 80°C, the leaching time is 80min, the solid-liquid ratio is 1:10g / mL, hydrogen The concentration...

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Abstract

The invention relates to the field of inorganic material preparation, in particular to a preparation method of titanium sesquioxide. The titanium sesquioxide preparation process comprises the steps of step a, mixing titanium dioxide and silica fume in the weight ratio of 1:0.25-0.5, forming to obtain formed material; step b, making the silica fume cover the surface of the material obtained in step a, heating the material to 1400-1500 DEG C in an airy atmosphere, keeping the temperature for 5-25 minutes, cooling and ball-grinding the material to obtain an original product; adding alkaline solution into the original product obtained in step b, making the product soak in alkaline solution for 60-120 minutes, filtering the product to obtain the final product. The titanium sesquioxide and preparation process is simple in process, short in reduction time, capable of preparing middle product in the airy atmosphere, and low in the requirements of production equipment and production environment. The final product is high in titanium sesquioxide purity. The application scope is wide, and the preparation process has a big market potential and application value.

Description

technical field [0001] The invention relates to the field of preparation of inorganic materials, in particular to dititanium trioxide and its preparation method and application. Background technique [0002] Ti 2 o 3 It is a hexagonal silicon carbide type oxide, which is suitable for preparing high-quality titanium-doped sapphire and Li x Ti 2 o 4 main raw material. Titanium-doped sapphire can be used to manufacture solid-state tunable lasers, which can form very short pulses, and the noise is only one-tenth of that of tunable dye lasers. It has a wide range of applications; lithium-titanium composite oxides can also be used as electrochemical intercalation electrode materials for rechargeable batteries; in addition, doped with Ti 2 o 3 Al(PO 3 ) 3 Glass has the maximum light absorption at 590nm, which makes the glass have more excellent physical properties than the laser glass currently used. [0003] At present, there are mainly the following methods for preparin...

Claims

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Application Information

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IPC IPC(8): C01G23/04
CPCC01G23/043C01P2002/72C01P2004/03C01P2004/61C01P2006/80
Inventor 吴恩辉李军侯静黄平赖奇刘黔蜀徐众
Owner 山东临港智能制造产业园有限公司
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