Patent · US Active

Method for the continuous dehydration of 3-hydroxypropionic acid to form acrylic acid

US9809526B2 · kind B2 · utility

1Cited by

6References

12Claims

0Family size

Assignee

BASF SE

Inventors

Tim Blaschke · Stuttgart, DE
Ortmund Lang · Quirnbach, DE
Marta Zajaczkowski-Fischer · Schifferstadt, DE
Marco Hartmann · Jockgrim, DE

Key dates

Filing date	May 13, 2015
Grant date	Nov 7, 2017
Priority date	—
Expiry date	May 13, 2035

Classification

Technology area (CPC C)Chemistry; Metallurgy
CPC primaryC07C51/43
WIPO fieldOrganic fine chemistry
WIPO sectorChemistry

Abstract

The invention relates to a process for dehydrating aqueous 3-hydroxypropionic acid to acrylic acid, wherein an aqueous mixture of 3-hydroxypropionic acid and oligomeric 3-hydroxypropionic acid is converted to acrylic acid in the liquid phase in a first step and aqueous acrylic acid is distilled out of the liquid phase, and the aqueous acrylic acid is separated by distillation into an acrylic acid-rich phase and a water-rich phase in a second step.

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