Patent · US Expired

Processes and apparatus for removing suspended matter from suspensions by filtration through foams

US4212737A · kind A · utility

2Cited by

4References

2Claims

0Family size

Assignee

BASF SE

Inventors

Hans Daucher · Ludwigshafen, DE
Manfred Dressel · Lambsheim, DE
Klaus Hess
Hubert Engelhardt · Ludwigshafen, DE

Key dates

Filing date	Mar 6, 1978
Grant date	Jul 15, 1980
Priority date	—
Expiry date	Mar 6, 1998

Classification

Technology area (CPC B)Performing Operations; Transporting
CPC primaryB01D2201/282
WIPO fieldChemical engineering
WIPO sectorChemistry

Abstract

A process and apparatus for removing suspended matter from suspensions by filtering through foams, in which the suspended matter retained in the foam (polyurethane foam produced by foaming with water vapor being preferred) is substantially flushed out by expressing the liquid held in the foam, and is removed as a concentrate. This for the the first time permits the removal of suspended matter from continuously flowing suspensions without the flow of the suspensions having to be interrupted in order to clean the filtering means.

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