rvdzero Posted September 6, 2008 Share Posted September 6, 2008 hey, i was just reading a patent on alkali metal carbonates. US patent : 4,495,107 . (can get the link if needed) Ok so i was wondering, what are my options for a solvent that could dissolve the urea, but not the alkali carbonate? I read that an inert solvent which doesnt really dissolve the alkali carbonate but dissolves the urea can be used. Any thoughts on toluene or xylene? any other suggestions? Link to comment Share on other sites More sharing options...
Tartaglia Posted September 6, 2008 Share Posted September 6, 2008 I would have thought that any slightly polar aprotic solvent would do Link to comment Share on other sites More sharing options...
rvdzero Posted September 7, 2008 Author Share Posted September 7, 2008 ah thanks. i read it recommended using a sulfoxide. so something like dmso. my next question, dmso is miscible in water so would the a 80% aqueous solution still be suitable, or would the presence of h20 interfere? Link to comment Share on other sites More sharing options...
Tartaglia Posted September 7, 2008 Share Posted September 7, 2008 If you use DMSO I would be tempted to use it dry or dryish. I would probably use something more volatile for ease of separation (eg CH2Cl2, diethylether). Link to comment Share on other sites More sharing options...
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