Dissolving method of high purity titanium dioxide

A titanium dioxide, high-purity technology, applied in the field of high-purity titanium dioxide dissolution, can solve the problems of small amount of sample dissolution, distortion of analysis data, long time consumption, etc., reduce the influence of interference signals, scientific and simple operation process, and improve the efficiency of analysis and testing Effect

Active Publication Date: 2015-05-27
CDGM OPTICAL GLASS
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

It takes a long time to use this dissolution method, the amount of sample dissolved is small, and it is easy to substitute impurities when adding more reagents. The toxic reagents are highly volatile and harmful to the human body and the environment. The analysis data of impurity elements is seriously distorted, and the accuracy and precision of the measurement results are poor, which cannot meet the requirements of the analysis of trace impurity elements in high-purity titanium dioxide. Therefore, the above dissolution method is not suitable for the determination of the content of impurity elements in high-purity titanium dioxide.

Method used

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  • Dissolving method of high purity titanium dioxide

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Embodiment

[0024] 1) Grind high-purity titanium dioxide to a particle size > 300 mesh, put it in an oven at 110°C for 2 hours, and then cool to room temperature;

[0025] 2) Put the polytetrafluoroethylene standard reaction tanks (removing the lid on the reaction tank) that are numbered 1#, 2#, 3# respectively on the balance and weigh the high-purity titanium dioxide 1.0000g that step 1) obtains respectively, and Place them evenly in the standard polytetrafluoroethylene reaction tank;

[0026] 3) Add 8.0ml of 40.0wt% hydrofluoric acid (9.20g by weight) and 5 drops of 30.0wt% hydrogen peroxide into the polytetrafluoroethylene standard reaction tank numbered 1# with a pipette gun (conversion into weight is 0.36g); Adding 8.0ml purity is 40.0wt% hydrofluoric acid (conversion into weight is 9.20g) and 5 drops Purity is 30.0wt% hydrogen peroxide (converted into weight and is 0.36g); Add 8.0ml of purity into 40.0wt% hydrofluoric acid (converted into weight) in the polytetrafluoroethylene stan...

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Abstract

The invention provides a dissolving method for measuring the content of impurity elements suitable for high purity titanium dioxide. The dissolving method of high purity titanium dioxide comprises the following steps: 1) grinding high purity titanium dioxide, and drying and cooling; 2) weighing the high purity titanium dioxide obtained by the step 1), and placing the high purity titanium dioxide in a reaction tank; 3) adding hydrofluoric acid and hydrogen peroxide to heat, wherein the high purity titanium dioxide is completely dissolved; and 4) taking off a lid on the reaction tank, and adding concentrated sulfuric acid after distillation to continuously heat, wherein hydrofluoric acid in the liquor is volatilized; and cooling to complete. With the adoption of the dissolving method provided by the invention, the interference caused by introduced solvents is reduced to the maximum extent, the influence by interference signals is reduced, the analytic and detecting lower limit of elements to be detected is reduced, the sensitivity, accuracy and precision for analysis are improved, the analytical testing efficiency is greatly improved, and the analytical testing cost is low.

Description

technical field [0001] The invention relates to a method for dissolving high-purity titanium dioxide. Background technique [0002] The chemical properties of high-purity titanium dioxide (purity > 99.9wt%) are very stable, and it hardly reacts with other substances at room temperature. Only under certain conditions can it be completely dissolved in concentrated sulfuric acid and hydrofluoric acid, so it is very difficult to dissolve titanium dioxide. Usually, the dissolution method of high-purity titanium dioxide in the laboratory is to place a high-purity titanium dioxide sample in a beaker, add concentrated sulfuric acid and ammonium sulfate dissolution reagents, and heat and dissolve on a resistance furnace. It takes a long time to use this dissolution method, the amount of sample dissolved is small, and it is easy to substitute impurities when adding more reagents. The toxic reagents are highly volatile and harmful to the human body and the environment. The analysi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N1/28G01N1/44
Inventor 巫兰萍李青
Owner CDGM OPTICAL GLASS
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