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Preparation method of sodium molybdate

A technology of sodium molybdate and ammonium molybdate, applied in chemical instruments and methods, molybdenum compounds, inorganic chemistry, etc., can solve the problems of complex synthesis process and high production cost of sodium molybdate, achieve good repeatability, and prevent product particles from passing too much. Large, low-cost effects

Active Publication Date: 2018-11-23
BENGBU COLLEGE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The purpose of the present invention is to solve the problems of high production cost and complicated synthesis process of existing sodium molybdate, and provide a preparation method of sodium molybdate

Method used

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  • Preparation method of sodium molybdate

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Effect test

Embodiment 1

[0015] Accurately take by weighing 1.7111 gram of industrial sodium nitrite, be dissolved in 100 mL of distilled water, make sodium nitrite solution, accurately take by weighing 2.1891 gram of industrial ammonium molybdate, be dissolved in 100 mL of distilled water, make ammonium molybdate solution; At ℃, sodium nitrite solution was added dropwise to ammonium molybdate solution, and stirred continuously, then a white precipitate was formed. After aging for 12 h, it was washed three times with distilled water and absolute ethanol, and filtered with filter paper. After drying in an oven at 70 °C for 12 h, 2.9057 g of white flaky sodium molybdate product was obtained.

Embodiment 2

[0017] Accurately take by weighing 1.7111 gram of industrial sodium nitrite, be dissolved in 50 mL of distilled water, make sodium nitrite solution, accurately take by weighing 2.1891 gram of industrial ammonium molybdate, be dissolved in 50 mL of distilled water, make ammonium molybdate solution; At ℃, sodium nitrite solution was added dropwise to ammonium molybdate solution, and stirred continuously, then a white precipitate was formed. After aging for 12 h, it was washed three times with distilled water and absolute ethanol, and filtered with filter paper. After drying in an oven at 70 °C for 12 h, 2.9586 g of white flaky sodium molybdate product was obtained.

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Abstract

The invention relates to a preparation method of sodium molybdate. The preparation method is characterized by comprising the following steps of at normal temperature, gradually dripping a sodium nitrite solution with concentration of 1.0g / L to 50g / L into an ammonia molybdate solution with concentration of 1.0g / L to 50g / L, controlling the atom molar ratio of sodium to molybdenum to 2:1, continuously stirring, producing white precipitate, aging for 12h, respectively washing by distilled water and anhydrous ethyl alcohol for three times, filtering, and drying, so as to obtain the finished product, namely white flaky sodium molybdate. The preparation method has the beneficial effects that the ammonia molybdate and the sodium nitrite are used as the raw materials to prepare the sodium molybdate, and a nitrite mother liquid after filtering can be used as the raw material for preparing the sodium nitrite; the cost is low, the reaction conditions are mild, the operation is convenient, the control is easy, and the repeatability is good; the particles of the prepared sample are uniform.

Description

technical field [0001] The invention belongs to the field of preparation of chemical preparations, and relates to a preparation method of sodium molybdate. Background technique [0002] With the progress and rapid development of society, molybdenum has been widely used, especially molybdate has great application value in inhibitors and corrosion inhibitors. At present, there are several aspects of consumption and processing of molybdenum industry in my country. First, the molybdenum concentrate is processed into metallurgical charge products and then applied to the steel industry and non-ferrous metal industry; second, anti-corrosion belongs to the chemical industry. First, molybdenum is processed into molybdenum salt or molybdenum oxide, and further processed Molybdenum catalysts, pigments, etc.; thirdly, it is used in the form of molybdenum metal or molybdenum-based alloys for structural or functional parts of machinery, facilities, and appliances used in high-temperature...

Claims

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Application Information

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IPC IPC(8): C01G39/00
CPCC01G39/00
Inventor 刘伟胡文娜
Owner BENGBU COLLEGE
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