Apparatus for making (DL) pantolactone

US4095952A · kind A · utility

Assignee

• Veb Jenapharm Jena · US

Inventors

• Joachim Schmidt · Schlangen, DE
• Wolfgang Bamberg · Jena, DE
• Hartmut Grunert
• Erhard Schorm
• Christian Weigelt · Jena, DE

Key dates

• Filing date: Oct 15, 1976
• Grant date: Jun 20, 1978
• Expiry date: Oct 15, 1996

Classification

• Technology area (CPC B): Performing Operations; Transporting
• CPC primary: B01J19/2435
• WIPO field: Organic fine chemistry
• WIPO sector: Chemistry

Abstract

An apparatus for making DL-pantolactone in a continuous process comprises the following parts and setup: A circulation heater and a circulation reactor, means for introducing the components into the reactor, a heat-exchanger forming part of the circulation reactor, a longitudinal aftertreatment reactor and a final longitudinal reactor comprising dual reaction chambers with means for applying heat and pressure in the first chamber and maintaining the reaction product in the second chamber at such heat and pressure. The apparatus may also include a chamber for forming a premix of some of the components with a subsequent cooling device prior to the introduction into the circulation reactor. It may furthermore include a stripping column and pulsation column for recovering the final product from the solution.