Method for depleting 2-methoxyethanol (MOE)

US11214555B2 · kind B2 · utility

Assignee

• BASF SE

Inventors

• Eva Koch · Ludwigshafen am Rhein, DE
• Oliver Bussmann · Ludwigshafen am Rhein, DE
• Joachim Pfeffinger · Ludwigshafen, DE
• Joerg Pastre · Ludwigshafen, DE
• Johann-Peter Melder · Schifferstadt, DE

Key dates

• Filing date: Feb 11, 2019
• Grant date: Jan 4, 2022
• Expiry date: Feb 11, 2039

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C07C41/42
• WIPO field: Organic fine chemistry
• WIPO sector: Chemistry

Abstract

A process for the depletion of 2-methoxyethanol (MOE) from a mixture comprising predominantly morpholine (MO) (crude morpholine), wherein crude morpholine is distilled in a distillation column in the presence of an alkali metal compound of the general formula M+[RO−] (M+ is alkali metal cation and R is hydrogen (H), methyl, ethyl, propyl, isopropyl, n-butyl, isobutyl, sec-butyl or tert-butyl), where MO and a compound of the general formula R—OH are distilled off and an alkali metal methoxyethoxide of the general formula M+[MeOEtO−] is obtained in the bottom of the column.