Process for the production of diazonium compounds with a low content of sodium ions

US5986075A · kind A · utility

Assignee

• BAYER HEALTHCARE LLC · DE

Inventors

• John C. DuBose · Summerville, US
• Andrew David Johnson · Doylestown, US
• Samuel Shaun Murphree · Summerville, US
• Edzard Tholema · Odenthal, DE
• Helmut Hoffmann
• Wolfgang Zarges · Neunburg vorm Wald, DE
• Wolfgang Frank
• Bettina Burkhardt · Krefeld, DE

Key dates

• Filing date: Jan 20, 1999
• Grant date: Nov 16, 1999
• Expiry date: Jan 20, 2019

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C09D11/328
• WIPO field: Organic fine chemistry
• WIPO sector: Chemistry

Abstract

The present invention relates to a process for desalting aqueous suspensions containing an organic diazonium compound and electrolytes containing Na ions, in which the aqueous suspension is passed through a semipermeable membrane.