Aluminum hydroxide analysis method

Abstract

The invention provides an aluminum hydroxide analysis method, and relates to the technical field of aluminum hydroxide analysis in ultra-white glass production. The aluminum hydroxide analysis method comprises the following steps: S1, determining the ignition loss of an aluminum hydroxide sample, firing the dried sample, and calculating the calculation fraction of the ignition loss according to the lost mass, S2, preparing an aluminum hydroxide solution, washing the sample dried and fired in the step S1 with boiling water, melting the sample on a sand bath, transferring the sample into a 250ml volumetric flask, and preparing a solution to be detected, and S3, determining that the solution to be detected is obtained. Measuring the to-be-measured solution, and respectively adding an indicator into the to-be-measured solution and the standard solution. According to the method, component analysis of aluminum hydroxide is studied, after the research is completed, the factory entering standard of the aluminum hydroxide raw material is effectively controlled, a data basis is provided for ultra-white glass production, a proper amount of aluminum hydroxide can be accurately added, risks caused by components are reduced, few impurities can be introduced, and the production efficiency is improved. After research, the stability of raw material factory-entering components can be ensured, and the company cost is reduced.

Description

Technical Field

[0001] The invention relates to the technical field of aluminum hydroxide analysis in ultra-white glass production, in particular to an aluminum hydroxide analysis method. Background Art

[0002] Aluminum hydroxide in ultra-white glass is an important raw material used to improve the whiteness and light transmittance of glass. It helps to reduce the iron content in the glass, thereby improving the whiteness and light transmittance of the glass. The addition of aluminum hydroxide can also increase the whiteness of the glass and improve the clarification effect of glass melting.

[0003] In the production process of ultra-white glass, the aluminum content requirement is relatively high, and feldspar can no longer meet the production needs. Therefore, aluminum hydroxide is selected to replace feldspar. During the production of ultra-white glass, the composition of aluminum hydroxide is tested according to the national standard method, and the detection process is complicated and the detection time is long. The rapid and accurate inspection of incoming raw materials is of great significance for subsequent production adjustments. Summary of the invention

[0004] 1. Technical issues to be resolved

[0005] In view of the shortcomings of the prior art, the present invention provides an aluminum hydroxide analysis method, which solves the problems of complicated detection process and long detection time in the past.

[0006] (II) Technical solution

[0007] To achieve the above purpose, the present invention is implemented by the following technical scheme: Aluminum hydroxide analysis method comprises the following steps:

[0008] S1, loss on ignition of aluminum hydroxide sample, burn the dried sample and calculate the loss on ignition fraction based on the lost mass;

[0009] S2, prepare aluminum hydroxide solution, dry and burn the sample in S1, wash it with boiling water, melt it on a sand bath, and then transfer it to a 250ml volumetric flask to prepare the solution to be tested;

[0010] S3, measuring the test solution, adding an indicator to the test solution and the standard solution respectively, adjusting the environment, and then measuring the standard solution with a spectrophotometer, and calibrating the spectrophotometer;

[0011] S4, taking measurement readings of the solution to be tested after calibration;

[0012] S5, calculation, fill in the measured standard solution data into the table, calculate its linear relationship and related values, substitute the values ​​of the solution to be tested, and calculate the silicon dioxide and ferric oxide contents.

[0013] Preferably, the drying temperature in S1 and S2 is 110°C±5°C, and the burning temperature is 1100°C±20°C.

[0014] Preferably, the indicator in S3 is ascorbic acid solution.

[0015] (III) Beneficial effects

[0016] The present invention provides an aluminum hydroxide analysis method having the following beneficial effects:

[0017] 1. This method studies the composition of aluminum hydroxide. After the study is completed, the standard of aluminum hydroxide raw materials entering the factory can be effectively controlled, providing a data basis for the production of ultra-white glass. It can accurately add appropriate aluminum hydroxide, reduce the risks caused by the composition, and introduce less impurities. After the study is completed, the stability of the composition of raw materials entering the factory can be guaranteed, reducing the company's costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a linear relationship diagram calculated from the standard solution data of the present invention. DETAILED DESCRIPTION

[0019] The technical solutions in the embodiments of the present invention are described clearly and completely below. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0020] The aluminum hydroxide analysis method comprises the following steps:

[0021] S1, for the loss on ignition of aluminum hydroxide sample, the dried sample is burned, and the loss on ignition is calculated based on the lost mass. The drying temperature is 110℃±5℃, and the burning temperature is 1100℃±20℃;

[0022] S2, prepare aluminum hydroxide solution, dry and burn the sample in S1, wash it with boiling water, melt it on a sand bath, and then transfer it to a 250ml volumetric flask to prepare the solution to be tested;

[0023] The sample purity was improved by washing with boiling water, and the sample was melted in a sand bath to ensure the uniformity and safety of the melting process. The sample was transferred to a 250 ml volumetric flask and water was added to prepare the test solution.

[0024] S3, measuring the test solution, adding an indicator to the test solution and the standard solution respectively, adjusting the environment, and then measuring the standard solution with a spectrophotometer, and calibrating the spectrophotometer;

[0025] Ascorbic acid solution is added to a standard solution of known concentration and a solution to be tested, the ambient temperature is adjusted, and then the standard solution of known concentration is tested by a spectrophotometer. The trivalent iron ions are reduced to divalent iron ions and form a red complex with o-phenanthroline. The absorbance of the solution is then measured by a spectrophotometer to calculate the content of ferric oxide, and the spectrophotometer is calibrated by a standard solution of known concentration.

[0026] The calibration data is shown in the following table:

[0027] Abs(Absorbance) Iron (III) oxide Corrected absorbance 0.001 0.000 0.000 0.015 0.025 0.014 0.067 0.075 0.066 0.149 0.125 0.148 0.178 0.150 0.177

[0028] S4, taking measurement readings of the solution to be tested after calibration;

[0029] S5, calculation, fill in the measured standard solution data into the table, calculate its linear relationship and related values, as follows Figure 1 As shown:

[0030] Substitute the values ​​of the solution to be tested to find out the content of silicon dioxide and ferric oxide, and refer to the following data table:

[0031]

[0032]

[0033] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. Aluminum hydroxide analysis method, characterized in that, The following steps are involved: S1, loss on ignition of aluminum hydroxide sample, burn the dried sample and calculate the loss on ignition fraction based on the lost mass; S2, prepare aluminum hydroxide solution, dry and burn the sample in S1, wash it with boiling water, melt it on a sand bath, and then transfer it to a 250ml volumetric flask to prepare the solution to be tested; S3, measuring the test solution, adding an indicator to the test solution and the standard solution respectively, adjusting the environment, and then measuring the standard solution with a spectrophotometer, and calibrating the spectrophotometer; S4, taking measurement readings of the solution to be tested after calibration; S5, calculation, fill in the measured standard solution data into the table, calculate its linear relationship and related values, substitute the values ​​of the solution to be tested, and calculate the silicon dioxide and ferric oxide contents.

2. The aluminum hydroxide analysis method according to claim 1, wherein: In S1 and S2, the drying temperature is 110°C±5°C, and the burning temperature is 1100°C±20°C.

3. The aluminum hydroxide analysis method according to claim 1, wherein: The indicator in S3 is ascorbic acid solution.

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