Process for the purification of polyethers using a tubular coil evaporator

US4143072A · kind A · utility

Assignee

• BAYER HEALTHCARE LLC · DE

Inventors

• Hartmut Hetzel · Cologne, DE
• Pramod Gupta · Bedburg, DE
• Hans-Joachim Sandhagen · Dormagen, DE

Key dates

• Filing date: Apr 27, 1978
• Grant date: Mar 6, 1979
• Expiry date: Apr 27, 1998

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C08G65/30
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

This invention relates to a process for the removal of troublesome secondary products, particularly small quantities of water, solvents, low molecular weight glycols, and pungent-smelling substances, from polyethers by means of a tubular coil evaporator.