Since I didn't found any toppic on recycling generaly this might be neat one.
There is nothing bad about being green,right?!
Especially if it saves a lot of money...
Since methanol is extremely expensive and hard to come by where I live.
I got idea for recycling methanol after reductive amination,so tell me will it work.
After reductive amination is done you add NaOH in gray mess to from black mess and you extract it with toluene,now most people throw it away.
I figured out that you can't simply distill this since methanol forms ionic compound with strong base,
so can you neutralize basic black mess with some strong mineral acid and distill methanol!?
There should be some methylamine in but that doesn't bothers me at all since it will be used for same purpose again :-)
Only issue might be water,but there is MgSO4 for that...
Other thing is toluene.
Since I claim my crystals by washing freebase in toluene with 10%HCl solution and letting it evaporate it gets foggy(emulsion) after that last step.
So my guess is that you can simply wash toluene with 30% NaOH (cheap and readily available here) and that it will suck all the emulsioned
water,convert remaining of the salt from that acidic water in freebase (that emigrates back in toluene).
No need to distill...but you can to see how much of crap or freebase left.
What do you think!?
Will it work,what contaminants to expect!?
There is nothing bad about being green,right?!
Especially if it saves a lot of money...
Since methanol is extremely expensive and hard to come by where I live.
I got idea for recycling methanol after reductive amination,so tell me will it work.
After reductive amination is done you add NaOH in gray mess to from black mess and you extract it with toluene,now most people throw it away.
I figured out that you can't simply distill this since methanol forms ionic compound with strong base,
so can you neutralize basic black mess with some strong mineral acid and distill methanol!?
There should be some methylamine in but that doesn't bothers me at all since it will be used for same purpose again :-)
Only issue might be water,but there is MgSO4 for that...
Other thing is toluene.
Since I claim my crystals by washing freebase in toluene with 10%HCl solution and letting it evaporate it gets foggy(emulsion) after that last step.
So my guess is that you can simply wash toluene with 30% NaOH (cheap and readily available here) and that it will suck all the emulsioned
water,convert remaining of the salt from that acidic water in freebase (that emigrates back in toluene).
No need to distill...but you can to see how much of crap or freebase left.
What do you think!?
Will it work,what contaminants to expect!?
