Sciencemadness Discussion Board
Not logged in [Login ]
Go To Bottom

Printable Version  
Author: Subject: Removing NaCl
SAM4CH
Hazard to Others
***




Posts: 162
Registered: 16-7-2004
Location: TA
Member Is Offline

Mood: PERFECT

[*] posted on 5-5-2009 at 05:26
Removing NaCl


How can I use new technique to remove "1-2%" of sodium chloride in aqueos solution with another dissolved chemical in the same solution??

What about Membranes?
View user's profile View All Posts By User This user has MSN Messenger
hissingnoise
International Hazard
*****




Posts: 3940
Registered: 26-12-2002
Member Is Offline

Mood: Pulverulescent!

[*] posted on 5-5-2009 at 06:04


It's hard to say without knowing what it is you want to purify and how much is in solution. . .
1-2% shouldn't be too difficult.
View user's profile View All Posts By User
SAM4CH
Hazard to Others
***




Posts: 162
Registered: 16-7-2004
Location: TA
Member Is Offline

Mood: PERFECT

[*] posted on 5-5-2009 at 06:30


It is 2% NaCl in water with 550g/L NaClO3!!
I should purfied NaClO3 with out recrystalyzation or washing, I like to use membrane technique..
View user's profile View All Posts By User This user has MSN Messenger
hissingnoise
International Hazard
*****




Posts: 3940
Registered: 26-12-2002
Member Is Offline

Mood: Pulverulescent!

[*] posted on 5-5-2009 at 08:08


If it's for pyro, 2% chloride is acceptable. . .
Recrystallisation is the way to go---a hot, saturated solution will deposit fairly pure chlorate.
Or you could use KCl to precipitate KClO3.
View user's profile View All Posts By User
not_important
International Hazard
*****




Posts: 3873
Registered: 21-7-2006
Member Is Offline

Mood: No Mood

[*] posted on 6-5-2009 at 05:10


I've not heard of membranes that give good selection of chloride vs chlorate, at least not afforable ones. This is a good example where recrystallisation would be the preferred method, just draw the solubility curves and see why.

View user's profile View All Posts By User
Rich_Insane
National Hazard
****




Posts: 371
Registered: 24-4-2009
Location: Portland, Oregon
Member Is Offline

Mood: alive

[*] posted on 6-5-2009 at 08:12


Considering how small the impurity is (I don't know your use, however), I think that recrystallizing the hot solution would be the way to go.
View user's profile View All Posts By User

  Go To Top