Process for the concentration of solutions with simultaneous setting

US4318773A · kind A · utility

Assignee

• BAYER HEALTHCARE LLC · DE

Inventors

• Martin Ullrich · Leverkusen, DE
• Manfred Hederich · Leverkusen, DE
• Karl-Friedrich Jerchel · Krefeld, DE

Key dates

• Filing date: May 2, 1978
• Grant date: Mar 9, 1982
• Expiry date: May 2, 1998

Classification

• Technology area (CPC B): Performing Operations; Transporting
• CPC primary: B29C48/03
• WIPO field: Chemical engineering
• WIPO sector: Chemistry

Abstract

Liquid solutions are evaporated to their setting points and the set material so formed is crushed in a screw machine. The phase conversion from the still viscous state to the flowable crushed solid state is carried out in a single closed housing zone of the screw machine and comprises simultaneous evaporation, setting, crushing and further concentration.