Patent · US Expired

Continuous distillative separation of liquid mixtures which contain (meth) acrylic acid as the main component

US5897749A · kind A · utility

22Cited by

1References

10Claims

0Family size

Assignee

BASF SE

Inventors

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

Key dates

Filing date	Oct 18, 1996
Grant date	Apr 27, 1999
Priority date	—
Expiry date	Oct 18, 2016

Classification

Technology area (CPC Y)Emerging Cross-Sectional Technologies
CPC primaryY10S203/22
WIPO fieldChemical engineering
WIPO sectorChemistry

Abstract

Liquid mixtures which contain (meth)acrylic acid as the main component are continuously separated in a distillation apparatus which comprises a still, a condenser and a connection between still and condenser and to which the liquid mixture to be separated is continuously fed, by a process in which the energy required for evaporation of the liquid mixture is supplied to the distillation apparatus by a procedure in which a part of the liquid content of the still is continuously removed, superheated and recycled to the still.

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