Patent · US Expired

Process and apparatus for gassing liquids

US4370151A · kind A · utility

10Cited by

10References

7Claims

0Family size

Assignee

Hoechst GmbH · DE

Inventors

Peter Herbrechtsmeier · Königstein, DE
Hans-Ludwig Schafer · Hochheim, DE
Rudolf Steiner · Bassersdorf, CH

Key dates

Filing date	Mar 24, 1981
Grant date	Jan 25, 1983
Priority date	—
Expiry date	Mar 24, 2001

Classification

Technology area (CPC Y)Emerging Cross-Sectional Technologies
CPC primaryY10S261/29
WIPO fieldChemical engineering
WIPO sectorChemistry

Abstract

The invention provides a process for multistep gassing of liquids streaming downward in a gassing apparatus, which comprises using a gassing apparatus consisting of at least two superposed downstream parts, wherein the gas is fed in at the upper end of each downstream part and fresh gas is fed in exclusively at the upper end of the lowest downstream part, the gas bubbles are separated at the lower end of each downstream part and the separated gas bubbles are discharged to the outside and recycled to the next downstream part above. The invention provides furthermore a corresponding gassing apparatus.

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