Patent · US Expired

Ionic liquids as selective additives for separation of close-boiling or azeotropic mixtures

US7435318B2 · kind B2 · utility

32Cited by

3References

30Claims

0Family size

Assignee

BASF SE

Inventors

Wolfgang Arlt · Hohen Neuendorf, DE
Matthias Seiler · Soest, DE
Carsten Jork · Berlin, DE
Thomas Schneider · Frederick, US

Key dates

Filing date	Mar 14, 2002
Grant date	Oct 14, 2008
Priority date	—
Expiry date	Jul 31, 2024

Classification

Technology area (CPC B)Performing Operations; Transporting
CPC primaryB01D3/36
WIPO fieldChemical engineering
WIPO sectorChemistry

Abstract

The invention relates to a process for separating close-boiling, homo- and heteroazeotropic mixtures by using ionic liquids. Due to the selectivity and unusual combination of properties of the ionic liquids the process is superior to conventional extractive rectification from the point of view of costs and energy.

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