Columnar crystals of 6-hydroxy-2-naphthoic acid and process...

Details Columnar crystals of 6-hydroxy-2-naphthoic acid and process... Columnar crystals of 6-hydroxy-2-naphthoic acid and process...

C - Chemistry, Metallurgy

07

C

C07C 51/43 (2006.01) C07C 65/11 (2006.01)

Patent

CA 2348401

A process for the production of columnar crystals of 6-hydroxy-2-naphthoic acid, which comprises dissolving crude 6-hydroxy-2-naphthoic acid in an aqueous medium, adding seed crystals of 3-hydroxy-2,7-naphthoic acid or seed columnar crystals to the solution, and cooling the resulting mixture to conduct crystallization; and columnar crystals of 6-hydroxy-2-naphthoic acid produced by the process, which exhibit in the X-ray diffraction a peak 2$g (u) ranging from 16.8 to 17.8 and/or from 21.3 to 22.3 and have a high apparent specific gravity and excellent fluidity.

L'invention concerne un procédé de production de cristaux colonnaires d'acide 6-hydroxy-2-naphtoïque, consistant à dissoudre de l'acide 6-hydroxy-2-naphtoïque brut dans un milieu aqueux, à ajouter à la solution des germes cristallins d'acide 3-hydroxy-2,7-naphtoïque ou des germes cristallins colonnaires à la solution, et à refroidir le mélange obtenu pour réaliser une cristallisation. L'invention concerne également des cristaux colonnaires d'acide 6-hydroxy-2-naphtoïque produits conformément audit procédé, lesquels cristaux présentent, en diffraction aux rayons X, un pic 2.theta. compris entre 16,8 et 17,8 et/ou entre 21,3 et 22,3, et ont une gravité spécifique apparente élevée et une excellente fluidité.

Affiliated with

Also associated with

Rating

Columnar crystals of 6-hydroxy-2-naphthoic acid and process... does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Columnar crystals of 6-hydroxy-2-naphthoic acid and process..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Columnar crystals of 6-hydroxy-2-naphthoic acid and process... will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFCA-PAI-O-1398580