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Specialty Chemistry Forums => Citizen Chemist => Topic started by: Laurocapram on August 05, 2013, 04:16:53 AM

Title: How to make up molybdenum???
Post by: Laurocapram on August 05, 2013, 04:16:53 AM
I know one of the way to make up molybdenum is to use molybdenum dioxide, but how to do in detail? Will it produce poison?
Title: Re: How to make up molybdenum???
Post by: Hunter2 on August 05, 2013, 04:36:08 AM
Nothing for at home

http://en.wikipedia.org/wiki/Molybdenum
Title: Re: How to make up molybdenum???
Post by: billnotgatez on August 05, 2013, 07:41:17 AM
WIKI says
Melting point    2896 K, 2623 °C, 4753 °F
Oh My Goodness
Title: Re: How to make up molybdenum???
Post by: Enthalpy on August 08, 2013, 02:03:52 PM
Few companies offer molybdenum for mechanical engineering; Plansee produces the metal through hydrogen reduction of a powder of mixed ammonium molybdate and molybdenum trioxide. The metal powder is then sintered (1800-2200°C under hydrogen), and finally hot (1200-1500°C) laminated, forged, extruded...
www.plansee.com/pdfs/Molybdenum.pdf
not really simple for home process, is it? Though for chemical uses, you don't need to sinter  ;D
Title: Re: How to make up molybdenum???
Post by: 408 on August 08, 2013, 09:16:25 PM
How much work do you want to put into doing this at home?  Doable, but rather a bit of work.

First you need to build or buy a tube furnace
http://www.versuchschemie.de/ptopic,168531.html#168531
here too http://www.sciencemadness.org/talk/viewthread.php?tid=9705

Then place the MoO2 inside, heat the thing up, and pass hydrogen through it.  Of course ensuring no H2 leaks and contacts the heating elements in the presence of oxygen.

Title: Re: How to make up molybdenum???
Post by: Leiem on August 26, 2013, 07:31:52 AM
MoO2 + 2 H2 -----1223~1373K-----> Mo + 2 H2O
Title: Re: How to make up molybdenum???
Post by: vmelkon on October 27, 2013, 06:44:12 PM
I have heard that halogen lights contain molybdenum sheets. They are located at the 2 extremities. They melt the glass and cover the molybdenum and it makes contact with the steel wire and tungsten filament. The suspension coils for the tungsten might also be molybdenum.