Patent · US Expired

Process for separating by distillation pure (meth)acrylic acid from mixtures

US6350352B2 · kind B2 · utility

3Cited by

5References

11Claims

0Family size

Assignee

BASF SE

Inventors

Ruprecht Kroker · Frankenthal (Pfalz), DE
Manfred Wiedemann · Ludwigshafen, DE

Key dates

Filing date	Feb 22, 1999
Grant date	Feb 26, 2002
Priority date	—
Expiry date	Feb 22, 2019

Classification

Technology area (CPC Y)Emerging Cross-Sectional Technologies
CPC primaryY10S203/22
WIPO fieldOrganic fine chemistry
WIPO sectorChemistry

Abstract

A process for distillative separation of pure (meth)acrylic acid from mixtures which include comprise (meth)acrylic acid and dimers and oligomers of (meth)acrylic acid and are essentially free from aldehydes and from components whose boiling point is lower than that of (meth)acrylic acid, using a distillation apparatus which has a thin-film evaporator, a condenser and a connection which contains a baffle device and links the thin-film evaporator and the condenser.

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