Process and device for recovering amines and use of residues...

C - Chemistry – Metallurgy – 07 – C

Patent

Rate now

  [ 0.00 ] – not rated yet Voters 0   Comments 0

Details

C07C 211/08 (2006.01) C04B 7/04 (2006.01) C04B 11/00 (2006.01) C07C 209/84 (2006.01) C07C 209/86 (2006.01) C07C 211/05 (2006.01)

Patent

CA 2187428

The invention relates to a process for recovering amines from acid amine salt solutions by the addition of bases and evaporating the solution at a pH of 11 to 13 in a kneading drier until a useful solid is obtained as the distillation residue and a device for separating sludges and suspensions into a solid and a plurality of liquid fractions separated according to their boiling point. The low-water-content amine phase separated out by distillation is dehydrated with calcium oxide or potassium hydroxide and then separated into pure amine fractions by rectification. The process described makes it possible to utilise all the secondary flows and completely recycle the amines and the absorption medium (sulphuric acid). The flows for the recycling process are amine-charged washing acids from absorbers obtained from the cleaning of amine-containing exhaust gases obtained, produced for instance in the cold box process for hardening core sand in foundries.

L'invention concerne un procédé de récupération d'amines provenant de solutions acides de sel d'amine, par adjonction de bases et évaporation de la solution à un pH compris entre 11 et 13, dans un sécheur malaxeur, jusqu'à obtention d'un solide utilisable, sous forme de résidu de distillation. L'invention concerne également un dispositif de réduction de boues et de suspensions en un solide et une pluralité de fractions liquides séparées en fonction du point d'ébullition. La phase d'amine pauvre en eau séparée par distillation est déshydratée avec de l'oxyde de calcium ou de l'hydroxyde de potassium et est ensuite séparée par rectification en fractions d'amine pures. Ce procédé permet d'utiliser tous les flux secondaires et de recycler complètement les amines et l'absorbant (l'acide sulfurique). Les flux utilisés dans le processus de recyclage sont des acides de lavage chargés en amines, issus d'absorbants, obtenus pendant l'épuration de l'air d'évacuation contenant des amines, produit par ex. lors du processus cold-box utilisé pour le durcissement de sable à noyaux dans les fonderies.

LandOfFree

Say what you really think

Search LandOfFree.com for Canadian inventors and patents. Rate them and share your experience with other people.

Rating

Process and device for recovering amines and use of residues... does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Process and device for recovering amines and use of residues..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Process and device for recovering amines and use of residues... will most certainly appreciate the feedback.

Rate now

     

Profile ID: LFCA-PAI-O-1669037

  Search
All data on this website is collected from public sources. Our data reflects the most accurate information available at the time of publication.