Use of azeotropic distillation in process to dry 5-amino-N,N'bis (2,3-dihydroxypropyl)-2,4,6-triiodoisphthalamide

US5256393A · kind A · utility

Assignee

• MallincKrodt Medical, Inc. · US

Inventors

• William Z. McCarthy · Chesterfield, US
• Mills T. Kneller · University City, US
• Youlin Lin · Chesterfield, US
• David H. White · Ballwin, US

Key dates

• Filing date: Apr 16, 1991
• Grant date: Oct 26, 1993
• Expiry date: Apr 16, 2011

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C07C231/24
• WIPO field: Organic fine chemistry
• WIPO sector: Chemistry

Abstract

The use of azeotropic distillation to dry 5-amino-N,N'bis(2,3-dihydroxypropyl)-2,4,6-triiodoisophthalamide, an intermediate in the production of N,N'-bis(2,3-dihydroxypropyl)-5-N-(2-hydroxyethyl)glycolamido-2,4,6-triiod oisophthalamide.