Process for continuously preparing n-butyl acrylate or isobutyl acrylate

US10941103B2 · kind B2 · utility

Assignee

• BASF SE

Inventors

• Ortmund Lang · Quirnbach, DE
• Tim Blaschke · Stuttgart, DE
• Christian Raith · Mannheim, DE
• Michael Schafranka · Ludwigshafen, DE
• Claus Hechler · Mannheim, DE

Key dates

• Filing date: Aug 13, 2018
• Grant date: Mar 9, 2021
• Expiry date: Aug 13, 2038

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C07C69/54
• WIPO field: Organic fine chemistry
• WIPO sector: Chemistry

Abstract

A process for continuously preparing a butyl acrylate H2C═CH—C(═O)OR, with R=n-butyl or isobutyl, wherein aqueous 3-hydroxypropionic acid is converted under dehydrating and esterifying conditions in the presence of the corresponding butanol R—OH in a reactor with a rectification column and butyl acrylate formed, unconverted butanol and water used and formed are distilled off overhead as a ternary azeotrope, after separation into a liquid aqueous phase and liquid organic phase each of the aqueous and organic phases is at least partly discharged, and the organic phase comprising the butyl acrylate and the butanol is subjected to distillative separation.