Patent · US Active

CO2 removal from gas using ionic liquid absorbents

US7527775B2 · kind B2 · utility

17Cited by

2References

20Claims

0Family size

Assignee

CHEVRON U.S.A. INC. · US

Inventors

Daniel Chinn · Danville, US
De Vu · Bakersfield, US
Michael S. Driver · Oakland, US
Laura C. Boudreau · Lafayette, US

Key dates

Filing date	Apr 20, 2006
Grant date	May 5, 2009
Priority date	—
Expiry date	Dec 28, 2027

Classification

Technology area (CPC Y)Emerging Cross-Sectional Technologies
CPC primaryY02C20/40
WIPO fieldChemical engineering
WIPO sectorChemistry

Abstract

A process and method for separating CO2 from a gaseous stream such as natural gas. An ionic liquid comprising an anion having a carboxylate function and an effective amount of water is used as an adsorbent to selectively complex the CO2 yielding a gaseous stream with a greatly reduced CO2 content. The ionic liquid can then be readily be regenerated and recycled.

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