Patent · US Active

Halogen-free ionic liquids

US7863458B2 · kind B2 · utility

8Cited by

3References

17Claims

0Family size

Assignee

Merck Patent GmbH · DE

Inventors

Peter Wasserscheid · Cologne, DE
Andreas Bösmann · Stegen, DE
Roy Van Hal

Key dates

Filing date	Aug 31, 2004
Grant date	Jan 4, 2011
Priority date	—
Expiry date	Sep 17, 2027

Classification

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

Abstract

An ionic liquid according to the invention is substantially halogen-free, has a low viscosity and is stable to hydrolytic degradation under test conditions. The ionic liquid is a compound of the formula (cation) (R′—O—SO3), (cation) (R′—SO3), or a mixture of the two compounds. It can be used in processes for the chemical conversion and separation of materials by employing the ionic liquid as a solvent, solvent additive, extraction agent or phase-transfer catalyst. It can also be used in a heat exchange device wherein the ionic liquid serves as a heat carrier or heat carrier additive.

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