Ammonium Paratungstate is Synthesis

When concentrating an ammoniacal solution of tungstic acid (i.e. hydrous WO3), the product obtained is ammonium paratungstate. Below 50 C, the hexahydrate is formed, whereas when the temperature of the solution is above 50 °C, the pentahydrate or heptahydrate is formed. The former crystallizes as triclinic plates or prisms, whereas the latter as pseudorhombic needles.If a calcined WO3 is used, refluxing the ammonia solution is advisable to speed up the dissolution of the oxide.

Ammonium paratungstate is a white, crystalline powder with a very high degree ofchemical purity. It is used as a universal intermediate product for a variety of applications such as manufacturing tungsten oxides and tungsten metal powder, tungstic acid, ammonium paratungstate and organometallic components as well as in catalysis and fine chemistry.

Tungsten Powder Manufacturer & Supplier: Chinatungsten Online - http://www.tungsten-powder.com
Tel.: 86 592 5129696; Fax: 86 592 5129797
Email: sales@chinatungsten.com
Tungsten & Molybdenum Information Bank: http://i.chinatungsten.com
Tungsten News & Tungsten Prices, 3G Version: http://3g.chinatungsten.com
Molybdenum News & Molybdenum Price: http://news.molybdenum.com.cn

• < Prev
• Next >