Patent · US Expired

Method for extracting impurities using ionic liquids

US7605297B2 · kind B2 · utility

9Cited by

0References

20Claims

0Family size

Assignee

BASF SE

Inventors

Matthias Maase · Speyer, DE
Manuel Budich · Haßloch, DE
Georg Groβmann · Mannheim, DE
Laszlo Szarvas · Ludwigshafen, DE

Key dates

Filing date	Jul 3, 2004
Grant date	Oct 20, 2009
Priority date	—
Expiry date	Dec 31, 2025

Classification

Technology area (CPC Y)Emerging Cross-Sectional Technologies
CPC primaryY02P20/54
WIPO fieldOrganic fine chemistry
WIPO sectorChemistry

Abstract

The invention relates to a process for the extractive removal of phenols, alcohols, amines, phoshines, hydroxylamines, hydrazines, oximes, imines, water, carboxylic acids, amino acids, hydroxamic acids, sulfinic acids, sulfonic acids, peroxycarboxylic acids, phosphonous acids, phosphinous acids, phosphonic acids, phosphinic acids or phosphoric acids from aprotic solvents by means of ionic liquids of the formula [K]n+[A]n−, where n, [K]+ and An− are defined as in the description.

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