Patent · US Expired

Purification method for (meth)acrylic acid

US6852881B2 · kind B2 · utility

10Cited by

1References

21Claims

0Family size

Assignee

BASF SE

Inventors

Emile De Decker · Schoten, BE
Erik Bastiaensen · Kapellen, BE
Dieter Baumann · Greven, DE
Bernd Eck · Viernheim, DE
Jorg Heilek · Bammental, DE

Key dates

Filing date	Jan 24, 2001
Grant date	Feb 8, 2005
Priority date	—
Expiry date	Jan 24, 2021

Classification

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

Abstract

(Meth)acrylic acid is purified by crystallization by a process in which the (meth)acrylic acid is purified by a combination of at least two different dynamic crystallization processes, in particular a suspension crystallization and a layer crystallization.

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