Patent · US Active

Process and plant for the purification of acrylic acid

US10029976B2 · kind B2 · utility

1Cited by

3References

8Claims

0Family size

Assignee

L'Air Liquide, Societe Anonyme Pour l'Etude et l'Exploitation des Procedes Georges Claude · FR

Inventors

Thomas Gutermuth · Maintal, DE
Markus Kreich · Otzberg, DE
Frank Castillo-Welter · Friedrichsdorf, DE

Key dates

Filing date	Jun 16, 2015
Grant date	Jul 24, 2018
Priority date	—
Expiry date	Jun 16, 2035

Classification

Technology area (CPC C)Chemistry; Metallurgy
CPC primaryC07C51/44
WIPO fieldChemical engineering
WIPO sectorChemistry

Abstract

This invention relates to a process for the purification of acrylic acid from a mixture containing acrylic acid and acetic acid, comprising the following steps: extraction of the mixture containing acrylic acid and acetic acid with an extractant stream, whereby a raffinate stream and an extract stream are obtained, distillation of the extract stream, whereby an acrylic acid stream and a return stream are obtained, wherein the return stream contains acetic acid and is recirculated into the extraction.Furthermore, the invention may include a plant for carrying out this process.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.