Crystallization method for benzphetamine

C - Chemistry – Metallurgy – 07 – C

Patent

Rate now

  [ 0.00 ] – not rated yet Voters 0   Comments 0

Details

C07C 209/84 (2006.01) C07C 211/27 (2006.01)

Patent

CA 2588724

There is disclosed a method for the crystallization of benzphetamine hydrochloride from an organic medium by the steps of removing water from the system to a very low level and then reducing the temperature of the organic medium to provide crystallization of the acid salt. In the event that crystallization does not occur upon lowering the temperature of the medium, it has been discovered that gentle heating of the organic medium results in crystallization of the acid salt. It has also been discovered that higher temperature crystallization has been provided by removal of methamphetamine from the composition. The crystalline benzphetamine hydrochloride can then be isolated by typical liquid/solid separation means such as filtration or centrifugation.

La présente invention a pour objet une méthode de cristallisation du chlorhydrate de benzphétamine dans un milieu organique qui comporte les étapes suivantes : éliminer l~eau du milieu jusqu~à un niveau très bas, puis diminuer la température du milieu organique afin de provoquer la cristallisation du sel acide. Dans le cas où la cristallisation ne se produit pas lorsque la température du milieu diminue, il a été démontré qu~un faible chauffage du milieu organique provoquait la cristallisation du sel acide. Il a également été démontré qu~une cristallisation à plus haute température pouvait avoir lieu en éliminant la méthamphétamine du mélange. Le chlorhydrate de benzphétamine cristallin peut alors être isolé par des techniques de séparation solide/liquide courantes telles que la filtration ou la centrifugation.

LandOfFree

Say what you really think

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

Rating

Crystallization method for benzphetamine does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Crystallization method for benzphetamine, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Crystallization method for benzphetamine will most certainly appreciate the feedback.

Rate now

     

Profile ID: LFCA-PAI-O-1996159

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