Method and apparatus for short-path distillation

US4517057A · kind A · utility

Assignee

• Leybold-Heraeus GmbH · DE

Inventors

• Friedrich Fauser · Karlsruhe, DE
• Willi Fischer · Seligenstadt, DE

Key dates

• Filing date: Jun 4, 1982
• Grant date: May 14, 1985
• Expiry date: Jun 4, 2002

Classification

• Technology area (CPC B): Performing Operations; Transporting
• CPC primary: B01D3/12
• WIPO field: Chemical engineering
• WIPO sector: Chemistry

Abstract

In a method and apparatus for short-path, high-vacuum distillation from a liquid on plate-like evaporating surfaces from which distillable fractions evaporate and precipitate onto condensation surfaces a short distance away, the liquid is placed upon the evaporating surfaces at a temperature such that the energy required for its evaporation is taken, at least in part, from the still-unevaporated fraction of the liquid.