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A method for controlling the content of tellurium dioxide and tellurite in tellurite products

A tellurite and tellurium dioxide technology, applied in the field of chemical chemistry, can solve the problems of low purity of potassium tellurite product, inability to prepare high-purity needle-like potassium tellurite trihydrate, affecting product purity and the like

Active Publication Date: 2017-09-26
广东先导稀贵金属材料有限公司
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Problems solved by technology

The purity of the potassium tellurite product prepared by the method is not high, because the potassium tellurite solution obtained by directly reacting tellurium dioxide with potassium hydroxide is evaporated and concentrated, and the potassium tellurite is easily decomposed into di Tellurium oxide affects the purity of the product; at the same time, its process cannot realize industrial production, nor can it prepare high-purity acicular potassium tellurite trihydrate

Method used

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  • A method for controlling the content of tellurium dioxide and tellurite in tellurite products
  • A method for controlling the content of tellurium dioxide and tellurite in tellurite products

Examples

Experimental program
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Effect test

Embodiment 2

[0042] The tellurite product prepared in Example 2 is compared with the tellurite product prepared in Comparative Example 2, because it also adds suitable potassium hydroxide to the filtrate after the tellurite solution is prepared, and When preparing tellurite solution, the ratio of alkali metal hydroxide to tellurium dioxide is appropriate, the amount of tellurium dioxide produced in the prepared tellurite product is reduced, and the content of anhydrous potassium tellurite is greatly increased , the content of potassium tellurite trihydrate was significantly reduced.

Embodiment 3

[0043] The tellurite product prepared in Example 3 is compared with the tellurite product prepared in Comparative Example 3, because it also adds suitable potassium hydroxide to the filtrate after preparing the tellurite solution. The amount of tellurium dioxide produced in the prepared tellurite product is greatly reduced, the content of potassium tellurite trihydrate is greatly increased, and needle-shaped crystals are obtained, and the content of anhydrous potassium tellurite is obviously reduce.

Embodiment 4

[0044] The tellurite product prepared in Example 4 is compared with the tellurite product prepared in Comparative Example 4, because it also adds suitable potassium hydroxide to the filtrate after the tellurite solution is prepared, and When preparing the tellurite solution, the ratio of alkali metal hydroxide to tellurium dioxide is appropriate, and the amount of tellurium dioxide produced in the prepared tellurite product is greatly reduced, and the anhydrous potassium tellurite The content is greatly increased, and the content of potassium tellurite trihydrate is also increased, and acicular crystals are obtained.

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Abstract

The invention discloses a method for controlling the content of tellurium dioxide, the content of anhydrous tellurite and the content of trihydrate tellurite in a tellurite product. The method comprises the following steps that firstly, alkali metal hydroxide and tellurium dioxide are reacted in an aqueous solution with the mole ratio of 2.00:(1.00-1.15) to obtain a tellurite solution; secondly, alkali metal hydroxide is added in the tellurite solution, wherein the adding amount of alkali metal hydroxide accounts for X of alkali metal hydroxide in the first step by weight, different numerical value ranges are selected from X to control the content of tellurium dioxide, the content of anhydrous tellurite and the content of trihydrate tellurite in the tellurite product, and X is larger than zero and smaller than or equal to 8.00%. By means of the method, high-purity potassium tellurite can be prepared, and high-purity needle-like trihydrate potassium tellurite can also be prepared in an industrialized mode.

Description

technical field [0001] The invention belongs to the field of chemical chemistry, and in particular relates to a method for controlling the contents of tellurium dioxide and tellurite in tellurite products. Background technique [0002] Potassium tellurite, molecular formula K 2 TeO 3 , the molecular weight is 253.79g / mol, it is a colorless crystalline powder at room temperature, and it is easy to absorb water and deliquescence. Its main purpose is for the cultivation of medical microorganisms, such as the preparation of microorganism culture medium. Commonly used are potassium tellurite blood agar plate medium and tellurite broth medium. The former is used to cultivate and diagnose diphtheria bacteria, and the latter can be used for Enrichment culture of Staphylococcus aureus. In addition, potassium tellurite can also be used in the glass industry, such as the production of tellurite glass. [0003] With the emergence of superbugs and the emergence of bacterial resistanc...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01B19/00
CPCC01B19/008C01P2004/10C01P2006/80
Inventor 王波朱刘刘留
Owner 广东先导稀贵金属材料有限公司
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