Home » Ask & Discuss » Chemistry. » Inorganic Chemistry « Back to Discussion

Inorganic Chemistry

Hot goIITian

Joined:	22 Jul 2008
Post:	109

28 Aug 2008 09:52:01 IST

0 People liked this

762

Whats the van Arkel method.....for extraction..i need details..Hat assured

None

Whats the van Arkel method.....for extraction..i need details

Share this article on:

Comments (2)

goiitian

Blazing goIITian

Joined: 28 Apr 2008

Posts: 781

1 Sep 2008 22:09:45 IST

Like 0 people liked this

van Arkel method----> In the Van Arkel method impure metal is first converted into one of its unstable compounds. Heating the unstable compound of the metal at higher temperatures, decomposes it to give pure metal. For example, pure titanium can be obtained from impure titanium by converting it into tetraiodide, and then decomposing this tetraiodide to pure Ti.
FOR READIN--->(How do you purify ores, which have easily oxidizable impurities)------>The method used to purify impurities that are easily oxidizable is cupellation. Silver is refined by this method. The impure metal is fused in small boat shaped dishes made of bone ash called as cupels. The cupels are heated in a suitable furnace by a blast of air blown over them. The impurity like lead is easily oxidized to lead monoxide and is carried away by the blast, while pure silver is left behind.

Halo

Blazing goIITian

Joined: 18 Apr 2007

Posts: 1537

4 Sep 2008 10:27:41 IST

Like 1 people liked this

if i am correct it is the process for purification of zirconium and titanium etc

fist the impure metal is tretaed with iodine and the resulting compound is again heated at a higher temp which decomposes to give the pure product

Quick Reply

Reply

	Some HTML allowed.
	Keep your comments above the belt or risk having them deleted.
	Signup for a avatar to have your pictures show up by your comment
	If Members see a thread that violates the Posting Rules, bring it to the attention of the Moderator Team