Ammonium metatungstate and ammonium paratungstate are significantly different in many aspects. The following will be elaborated on in terms of definition, physical and chemical properties, uses and production processes:
Ammonium metatungstate and ammonium paratungstate have different definitions
What is the definition of ammonium metatungstate?
Ammonium metatungstate is an inorganic compound, a type of tungstate, which easily decomposes when heated. Its molecular formula is HN₆OW, and it appears as white crystalline powder or slightly yellow.
What is the definition of ammonium paratungstate?
Also an inorganic compound of tungsten, ammonium metatungstate is a sulfate of tungsten, has low solubility and is not easily decomposed by heat. Its molecular formula is (NH₄)WO·5H₂O, which appears as monoclinic fine transparent crystals or white crystals.
Ammonium metatungstate and ammonium paratungstate have different physical and chemical properties
The physical and chemical properties of ammonium metatungstate: water-soluble white crystalline powder or slightly yellow, and soluble in water.
Physical and chemical properties of ammonium paratungstate: Slightly soluble in water, solubility in water is less than 2% at 20°C, insoluble in alcohol. Its aqueous solution is weakly acidic. When heated below 100°C, some ammonia molecules begin to be removed. When heated strongly, all ammonia molecules and crystal water are removed, turning into tungsten trioxide yellow powder.
Ammonium metatungstate and ammonium paratungstate have different uses
What are the uses of ammonium metatungstate?
Ammonium metatungstate is mainly used to make tungsten metal, alloy steel, fire-proof fabrics, etc., and is used in the ceramic industry. At the same time, it is also an important raw material for manufacturing various petrochemical catalysts and other tungsten compounds, and is the main raw material for tungsten-based catalysts in refineries.
What are the uses of ammonium paratungstate?
Ammonium paratungstate is mainly used to make metal tungsten powder from tungsten trioxide or blue tungsten oxide, as well as ammonium metatungstate and other tungsten compounds. Its downstream products include tungsten material series (such as tungsten strips, tungsten wires and other electric vacuum materials), alloy series (such as tungsten carbide, cemented carbide, alloy blades, alloy drill bits, alloy molds, etc.) and other wear-resistant, pressure-resistant, and resistant products. High temperature mechanical equipment parts, etc.
The production processes of ammonium metatungstate and ammonium paratungstate are different.
What is the production process of ammonium metatungstate?
There are various production processes and preparation methods for ammonium metatungstate, including solvent extraction or ion exchange method using ammonium tungstate solution or sodium tungstate solution as raw materials, as well as through heating and thermal dissociation of ammonium paratungstate (APT) or neutralization method. have to.
What is the production process of ammonium paratungstate?
The production process of ammonium paratungstate is usually made by smelting, dissolving, crystallizing and other steps of tungsten ore.
In summary, there are significant differences between ammonium metatungstate and ammonium paratungstate in terms of definition, physical and chemical properties, uses and production processes. These differences make them have unique application values in different industrial fields.
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