 |
 | Home | Contact Us | FAQ | Search & Site Map | Link to Us |
 | Sign In | Join | Other 45 Sites in Network |
Natural Science Forum / Chemistry / Organic Synthesis / September 2004Acetonitrile recovery from Sulfuric Acid, Water and Acetonitrile Mixture.
Dear Sir/madam, I am doing a project to recover Acetonitrile (or Acetonitrile & water azeotrope) from a mixture of 900 Lt. of Sulfuric Acid (We use 98% one), 900 Lt. of Water and 600 Lt. of Acetonitrile. is it possible to recover the acetonitrile? what about the Sulfuric acid that is being present in the mixture? Would the Acetonitrile remains same at elevated temparatures in presense of Sulfuric acid? looking forward for you reply and thanking you in advance. regards, Venkateswara Reddy.G,  SignaturePaul J. Franklin(moderator - sci.chem.organic.synthesis) http://organicworldwide.net/sci.chem.organic.synthesis Georgia State University <chepjf@panther.gsu.edu> Atlanta, GA > Dear Sir/madam, > [quoted text clipped - 11 lines] > > Venkateswara Reddy.G, Acetonitrile boils at 82C Water boils at 100C Sulphuric boils at 335C Odds are you will get azeotrope of just water and actonitrile. Thus if you have a reasonable column, you will get 16 parts water to 84 parts acetonitrile. Then the acetonitrile will run out well before much water is lost, and the temperature won't be elevated much above 100C. How much acetonitrile will be lost (it is a nitrile and you have an acidic aqueous medium) to hydroysis will be a function of the time taken for distillation. It may be better to either (1) vac strip OR (2) flash off with short path still first to remove the acid and then go for fractionation. You will still have the problem to solve of how to remove the last 16% of water from your product if you want dry acetonitrile. Signature-- Ron Jones Don't repeat history, see unreported near misses in chemical lab/plant at http://www.crhf.org.uk -- Paul J. Franklin(moderator - sci.chem.organic.synthesis) http://organicworldwide.net/sci.chem.organic.synthesis Georgia State University <chepjf@panther.gsu.edu> Atlanta, GA Dear Jones! Thank you for the reply. I am just wondering whether the Acetonitrile will remain the same at elevated temperatures in presence of acidic aqueous solution. Please reply. regards, venkat Ron Jones <ron@ronjones.org.uk> wrote in message news:<chni13$e6j@panther.Gsu.EDU>... > venkateswara reddy g wrote: > > Dear Sir/madam, > > I am doing a project to recover Acetonitrile (or Acetonitrile & water > > azeotrope) from a mixture of 900 Lt. of Sulfuric Acid (We use 98% [quoted text clipped - 3 lines] > > acid that is being present in the mixture? Would the Acetonitrile > > remains same at elevated temparatures in presense of Sulfuric acid? > > looking forward for you reply and thanking you in advance. > > > > regards, > > Venkateswara Reddy.G, > Acetonitrile boils at 82C > Water boils at 100C > Sulphuric boils at 335C > Odds are you will get azeotrope of just water and actonitrile. Thus if you > have a reasonable column, you will get 16 parts water to 84 parts [quoted text clipped - 6 lines] > still have the problem to solve of how to remove the last 16% of water from > your product if you want dry acetonitrile. > Don't repeat history, see unreported near misses in chemical lab/plant > at http://www.crhf.org.uk SignaturePaul J. Franklin(moderator - sci.chem.organic.synthesis) http://organicworldwide.net/sci.chem.organic.synthesis Georgia State University <chepjf@panther.gsu.edu> Atlanta, GA Dear Sir, Thank you for the reply. I just wonder whether Acetonitrile would be in Acetonitrile form only at Elevated temperatures in presense of Sulfuric Acid. PLease Clarify. Regards, Venkat Ron Jones <ron@ronjones.org.uk> wrote in message news:<chni13$e6j@panther.Gsu.EDU>... > venkateswara reddy g wrote: > > Dear Sir/madam, > > I am doing a project to recover Acetonitrile (or Acetonitrile & water > > azeotrope) from a mixture of 900 Lt. of Sulfuric Acid (We use 98% > > one), 900 Lt. of Water and 600 Lt. of Acetonitrile. > > is it possible to recover the acetonitrile? what about the Sulfuric > > acid that is being present in the mixture? Would the Acetonitrile > > remains same at elevated temparatures in presense of Sulfuric acid? > > looking forward for you reply and thanking you in advance. > > > > regards, > > Venkateswara Reddy.G, > Acetonitrile boils at 82C > Water boils at 100C > Sulphuric boils at 335C > Odds are you will get azeotrope of just water and actonitrile. Thus if you > have a reasonable column, you will get 16 parts water to 84 parts [quoted text clipped - 6 lines] > still have the problem to solve of how to remove the last 16% of water from > your product if you want dry acetonitrile. > Don't repeat history, see unreported near misses in chemical lab/plant > at http://www.crhf.org.uk SignaturePaul J. Franklin(moderator - sci.chem.organic.synthesis) http://organicworldwide.net/sci.chem.organic.synthesis Georgia State University <chepjf@panther.gsu.edu> Atlanta, GA |
Reply to this Message |
 Sign In
 Join
 My Latest Posts My Monitored Threads My Blog My Photo Gallery My Profile My Homepage Start New Thread Enable EMail Alerts Rate this Thread
|
©2009 Advenet LLC Privacy Policy - Terms of Use
This website includes both content owned or controlled by Advenet as well as content owned or controlled by third parties.