Method and Apparatus for Preparing Blue Tungsten Oxide by Ammonium Paratungstate Self-reduction

The present invention discloses a method and a device for the preparation of the self-reducible paratungstate blue tungsten oxide, ammonium paratungstate which is 5 (NH.

A method paratungstate since reducing preparation blue tungsten oxide, which is based paratungstate 5 (NH4) 2O · 12WO3 · 5H2O as raw material, characterized in that: it comprises the following steps:. A will paratungstate 5 (NH4) 2O · 12WO3 · 5H2O thermally decomposed into tungsten trioxide WO3, ammonia NH3 and water vapor H2O; paratungstate said heating temperature is 400 ℃ ~ 600 ℃;. b using the tungsten oxide WOX good properties of ammonia NH3 decomposition catalyst, and said control of the reaction; the heat decomposition of the ammonia NH3 is further decomposed into nitrogen N2 and hydrogen H2;. c by controlling the reaction temperature and the gas pressure of the furnace proper, the reduction of tungsten trioxide WO3 tungsten oxide blue WO2.9 temperature is set to 550 ℃ ~ 800 ℃; furnace gas pressure in the range of 0 to 2 mbar.




Tungsten Manufacturer & Supplier: Chinatungsten Online - http://www.chinatungsten.com
Tel.: 86 592 5129696; Fax: 86 592 5129797
Email:   sales@chinatungsten.com
Tungsten News & Tungsten Prices, 3G Version: http://3g.chinatungsten.com
Tungsten News & Tungsten Prices, WML Version: http://m.chinatungsten.com

The above is reproduced from: Application Technology Network, if in doubt, please contact the content belongs website.

• < Prev
• Next >