C - Chemistry – Metallurgy – 07 – H
Patent
C - Chemistry, Metallurgy
07
H
C07H 1/06 (2006.01) C07H 5/02 (2006.01)
Patent
CA 2620875
A process of azeotropic removal of dimethylformamide, abbreviated as DMF, from a process stream containing DMF requiring its removal, is described wherein the said Process Stream being .obtained in a process for preparation of 4,1 ', 6' trichlorogalactosucrose, abbreviated as TGS, or TGS-6-ester including TGS-6- acetate or TGS-6-benzoate, comprising steps of (a) evaporation of the said process stream under reduced pressure to a concentrate to effect removal of a part of DMF azeotropically , (b) diluting the concentrate obtained at the end of step (a.) of this claim with water, preferably to about 5 to 10 times the volume of the said concentrate, and (c) repeating the cycles of evaporation under reduced pressure and dilution with water for more number of times until content of DMF in the concentrated mass is reduced to 0.5% or less of the concentrate.
La présente invention concerne un processus d'élimination azéotropique de diméthylformamide, abrégé en DMF, d'un flux de processus contenant le DMF et nécessitant son élimination, ce flux de processus étant obtenu dans un processus de préparation de 4,1 , 6' trichlorogalactosaccharose, abrégé en TGS ou ester de TGS-6 comprenant un acétate de TGS-6 ou un benzoate de TGS-6. Ce procesus comprend les étapes suivantes : (a) évaporation de ce flux de processus sous pression réduite de concentrat de façon à éliminer une partie du DMF de manière azéotropique, (b) dilution du concentrat obtenu à la fin de l'étape (a) de ces revendications avec de l'eau, de préférence d'un volume représentant cinq à dix fois celui du concentrat et, (c) répétition des cycles d'évaporation sous pression réduite et à nouveau dilution avec de l'eau un certain nombre de fois jusqu'à ce que le contenu en DMF dans la masse concentrée soit réduit à 0,5 % au maximum de ce concentrat.
Aurora Sundeep
Chandrasekhar Batchu
Ratnam Rakesh
Pharmed Medicare Pvt. Ltd.
Ridout & Maybee Llp
V. B. Medicare Private Limited
LandOfFree
A process for purification of trichlorogalactosucrose based... does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with A process for purification of trichlorogalactosucrose based..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and A process for purification of trichlorogalactosucrose based... will most certainly appreciate the feedback.
Profile ID: LFCA-PAI-O-1682079