Title:
【発明の名称】有機化合物の濃縮ならびに精製法
Document Type and Number:
Japanese Patent JP3304972
Kind Code:
B2
Abstract:
A process aimed at concentrating and purifying raw aqueous solutions of water-soluble non-ionic organic compounds, preferably those which are useful as contrast enhancing agents in diagnostic procedures, such as for example X-ray, NMR and ultrasound diagnosis, through the use of techniques of tangential filtration on membranes is disclosed. This process also allows the recovery of valuable reactants in excess and of reaction solvents, if any, and it is particularly useful for purifying expensive non-ionic iodinated compounds, which now have been widely used in X-ray imaging.
Inventors:
Viscardi Carlo
Piva Radolf
Piva Radolf
Application Number:
JP50489692A
Publication Date:
July 22, 2002
Filing Date:
February 19, 1992
Export Citation:
Assignee:
Bracco Esse Pierre
Techno Pharmacy Es.pi.a.
Techno Pharmacy Es.pi.a.
International Classes:
A61K49/00; A61K49/04; B01D61/02; B01D61/12; B01D61/14; B01D61/58; C07C231/24; C07C237/46; (IPC1-7): B01D61/12; A61K49/04; B01D61/58
Domestic Patent References:
| JP5182236A | ||||
| JP6178404A | ||||
| JP53118699A |
Attorney, Agent or Firm:
Ichiro Sugawara