Patent · US Active

Absorption medium for the selective removal of hydrogen sulfide from fluid streams

US8221712B2 · kind B2 · utility

4Cited by

4References

18Claims

0Family size

Assignee

BASF SE

Inventors

Gerald Vorberg · Ludwigshafen, DE
Torsten Katz · Ludwigshafen am Rhein, DE
Georg Sieder · Bad Dürkheim, DE
Christian Riemann · Ludwigshafen, DE
Erika Dengler · Haßloch, DE

Key dates

Filing date	Oct 9, 2009
Grant date	Jul 17, 2012
Priority date	—
Expiry date	Apr 30, 2030

Classification

Technology area (CPC Y)Emerging Cross-Sectional Technologies
CPC primaryY02E50/30
WIPO fieldChemical engineering
WIPO sectorChemistry

Abstract

An absorption medium for the removal of acid gases from a fluid stream comprises an aqueous solution a) of at least one amine and b) at least one phosphonic acid, wherein the molar ratio of b) to a) is in the range from 0.0005 to 1.0. The phosphonic acid is, e.g., 1-hydroxyethane-1,1-diphosphonic acid. The absorption medium exhibits a reduced regeneration energy requirement compared with absorption media based on amines or amine/promoter combinations, without significantly decreasing the absorption capacity of the solution for acid gases.

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