Process for the removal of impurities from hydrazine hydrate

US5484511A · kind A · utility

Assignee

• BAYER HEALTHCARE LLC · DE

Inventors

• Wolfgang Ohlendorf · Leverkusen, DE
• Michael Batz · Leichlingen, DE
• Hans-Heinrich Moretto · Cologne, DE
• Peter C. Schmidt · Leverkusen, DE
• Gerhard Jonas · Leverkusen, DE

Key dates

• Filing date: Aug 26, 1994
• Grant date: Jan 16, 1996
• Expiry date: Aug 26, 2014

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10S203/11
• WIPO field: Materials, metallurgy
• WIPO sector: Chemistry

Abstract

A process for the removal of organic impurities and dissolved salts from hydrazine hydrate and aqueous solutions thereof by distillation of the hydrazine hydrate under reduced pressure, passing the hydrazine hydrate vapor through an adsorbent, and condensing the vapor.