Patent · US Expired

Method for deacidifying a fluid stream and washing liquid used in such a method

US7749309B2 · kind B2 · utility

1Cited by

4References

15Claims

0Family size

Assignee

BASF SE

Inventors

Norbert Asprion · Ludwigshafen, DE
Christoph Grossmann · Hamburg, DE

Key dates

Filing date	Mar 4, 2003
Grant date	Jul 6, 2010
Priority date	—
Expiry date	Dec 16, 2023

Classification

Technology area (CPC B)Performing Operations; Transporting
CPC primaryB01D53/1493
WIPO fieldChemical engineering
WIPO sectorChemistry

Abstract

Disclosed is a method for deacidifying a fluid stream containing acidic gases as contaminants, according to which the fluid stream is brought into intimate contact with a washing liquid in at least one absorption step. Said washing liquid represents an aqueous solution containing a) tertiary aliphatic alkanolamines (alkanolamine A), at least 30 percent by weight of said tertiary aliphatic alkanolamines being 3-dimethylamino-1-propanol, and b) secondary aliphatic amines (activator B), at least 20 percent by weight of said secondary aliphatic amines being piperazin. The fluid stream which has been essentially purified of the acidic gases is then separated from the washing liquid that is loaded with acidic gases.

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