A method for large-scale production of potassium titanate by utilizing ore-grade titanium-containing compounds

A technology of titanium compounds and potassium titanate, which is applied in the fields of titanium compounds, chemical instruments and methods, and inorganic chemistry, can solve the problems of complicated production procedures, high raw material costs, and difficulty in large-scale production, and reduce alkaline corrosion loss , reduce calcination time, reduce the effect of calcination temperature

Active Publication Date: 2011-11-30
唐山原力新材料科技有限公司
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  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Excessive raw material costs, high-temperature alkaline corrosion, complicated procedures, and difficulty in achieving large-scale production are the main reasons for the high production cost of potassium titanate whiskers
[0004] At present, people cannot directly prepare flaky potassium titanate in one step, and its synthesis generally requires the addition of magnesium-containing raw materials, so what is actually obtained is flaky potassium magnesium titanate, not potassium titanate.
The preparation method of flaky potassium magnesium titanate often needs to add auxiliary solvents such as potassium chloride, potassium fluoride, potassium molybdate, potassium tungstate, for example: patent CN 1444544A uses potassium chloride as auxiliary solvent, and patent CN 101254945A uses potassium chloride as auxiliary solvent. Carnallite (KMgCl 3 ·6H 2 O) as cosolvent and magnesium source, although the use of cosolvent can reduce temperature of reaction, improve product quality, also brought following serious shortcoming to the production preparation of potassium magnesium titanate simultaneously: (1) cosolvent brings Alkaline environment leads to rapid equipment corrosion loss at high temperature; (2) The loss of co-solvent increases the production cost of potassium magnesium titanate; (3) The extensive use of co-solvent causes the mixed raw materials to soften severely at high temperature, even appearing in a liquid state, This is not conducive to large-scale production; (4) the use of cosolvent makes subsequent pickling and water washing indispensable, causing the production process to become complicated, for example: the CN 1444544A patent of Otsuka Chemical Co., Ltd. is to mix 294 grams of titanium dioxide, 128 grams Anhydrous potassium carbonate, 200 grams of KC1, 56 grams of magnesium hydroxide, 40 milliliters of water are fully mixed and uniform → pressed into a certain shape → calcined at 1050 ° C for 1 hour → crushed → pickling and washed at a certain pH value → drying → about 600 ° C Heat treatment for 12h
[0005] At present, in the actual production of potassium titanate whiskers and flaky potassium magnesium titanate, there are strict restrictions on the stacking height of the reaction raw materials, generally below 10cm, and the highest is no more than 20cm, so it is not true. Large-scale production, so the development of large-scale production methods for potassium titanate series products is also of great urgency

Method used

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  • A method for large-scale production of potassium titanate by utilizing ore-grade titanium-containing compounds
  • A method for large-scale production of potassium titanate by utilizing ore-grade titanium-containing compounds
  • A method for large-scale production of potassium titanate by utilizing ore-grade titanium-containing compounds

Examples

Experimental program
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Effect test

Embodiment 1

[0062] The crystalline rutile ore powder and potassium carbonate are TiO 2 And K 2 Based on O, according to the molar ratio of TiO 2 : K 2 O=5.5:1, fully mix the above two raw materials, add an appropriate amount of water during the mixing process, and the amount of water added to facilitate subsequent molding; then use a mold to press the above mixture into a three-dimensional channel structure with a height of 8cm, A cylindrical shape with a diameter of 10cm, the channel direction is parallel to the height direction, the channel diameter is 8mm, and the hole-to-hole spacing is 1cm; the above-mentioned cylindrical blank is heated to 1150℃ in a microwave shuttle kiln for 2 hours, and then cooled to 800 with the furnace After ℃, air-cooled to room temperature; the calcined product is crushed to 150 mesh with Raymond mill, and the product obtained is powdered potassium titanate. After X-ray diffraction analysis (such as figure 1 Shown) shows that the resulting product is potassium...

Embodiment 2

[0064] Amorphous titanium slag and potassium carbonate are TiO 2 And K 2 Based on O, according to the molar ratio of TiO 2 : K 2 O=5:1, fully mix the above two raw materials, add an appropriate amount of water during the mixing process, and the amount of water added to facilitate subsequent molding; then use a mold to press the above mixture into a three-dimensional channel structure with a height of 8cm, A cylindrical shape with a diameter of 10cm, the channel direction is parallel to the height direction, the channel diameter is 8mm, and the hole-to-hole spacing is 1cm; the above cylindrical blank is heated in a microwave shuttle kiln to 1050°C for 2 hours, and then cooled to 800 with the furnace After ℃, air-cooled to room temperature; the calcined product is crushed to 150 mesh with Raymond mill, and the product obtained is powdered potassium titanate. After X-ray diffraction analysis (such as image 3 Shown) shows that the resulting product is potassium hexatitanate (K 2 Ti...

Embodiment 3

[0066] The crystalline anatase ore powder and potassium carbonate are TiO 2 And K 2 Based on O, according to the molar ratio of TiO 2 : K 2 O=4:1, fully mix the above two raw materials, add an appropriate amount of water during the mixing process, and the amount of water added to facilitate subsequent molding; then use a mold to press the above mixture into 10cm×10cm with a three-dimensional channel structure ×8cm rectangular parallelepiped, the channel direction is parallel to the height direction, the channel diameter is 1cm, and the hole-to-hole spacing is 1cm; the above cuboid blank is heated to 1050℃ in a microwave-assisted electric heating shuttle kiln, kept for 2 hours, and then cooled with the furnace After reaching 800°C, air-cooled to room temperature; the calcined product was pulverized to 100 mesh with a Raymond mill, then washed with water, stirred, filtered, and finally heat treated at 600°C for 5 hours. The resulting product was powdered potassium titanate. X-ray ...

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Abstract

The invention discloses a method for producing potassium titanate in a large scale by utilizing an ore-grade titanium-containing compound, belonging to the technical field of preparation of inorganic materials. The method is mainly characterized in that: the ore-grade titanium-containing compound and potassium-containing compound are directly taken as raw materials, the raw materials are mixed to be uniform, the mixture is subjected to high temperature calcining (microwave calcining preferably) for 30 minutes to 24 hours at the high temperature of 900-1300 DEG C, whisker potassium titanate or flaky potassium titanate can be prepared by one-step synthesis, and the potassium titanate obtained by calcination is smashed, thus the finished product is obtained. A cheap ore-grade titanium-containing compound is taken as a reaction raw material, no fluxing agent is used in a preparation process, and no magnesium-containing raw material is used in preparation of the flaky potassium titanate, thus the raw material cost is greatly reduced, the procedure is simplified, and the corrosion loss of equipment in a high temperature alkali environment is reduced, thus being more applicable to mass production; and meanwhile, calcinations under the catalysis of microwave is utilized to speed up synthetic reaction of the potassium titanate, and the production efficiency is improved.

Description

Technical field [0001] The invention belongs to the technical field of inorganic material preparation, and specifically relates to a method for large-scale production of potassium titanate by using ore grade titanium-containing compounds. Background technique [0002] Potassium titanate, including potassium hexatitanate (K 2 Ti 6 O 13 ) And potassium octatitanate (K 2 Ti 8 O 17 ), has excellent mechanical properties, and its special tunnel structure gives it many unique physical and chemical properties, such as: high infrared reflectivity, low thermal conductivity, high heat resistance, high wear resistance, high electrical insulation and medium The electrical constant, high chemical stability, etc., therefore have an attractive and broad application prospect, especially in the automotive industry, and its application is receiving increasing attention. As a new generation of friction material, the use of potassium titanate in brake pads can not only greatly improve braking perfor...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G23/00
Inventor 申玉田徐艳姬申偲伯王玺龙
Owner 唐山原力新材料科技有限公司
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