Patent · US Active

Microfiltration membrane with improved filtration properties

US8727136B2 · kind B2 · utility

8Cited by

10References

9Claims

0Family size

Assignee

Membrana GmbH · DE

Inventors

Wolfgang Ansorge · Essen, DE
Oliver Schuster · Schwelm, DE
Friedbert Wechs · Bad Mergentheim, DE
Klaus Dombrowski

Key dates

Filing date	May 28, 2010
Grant date	May 20, 2014
Priority date	—
Expiry date	Jul 20, 2031

Classification

Technology area (CPC B)Performing Operations; Transporting
CPC primaryB01D2325/38
WIPO fieldChemical engineering
WIPO sectorChemistry

Abstract

Method for producing this membrane from a casting solution comprising the hydrophobic first sulfone polymer and the hydrophilic second polymer in a solvent system, the method comprising the steps of pouring the casting solution, conditioned to a molding temperature, onto a carrier to form a film, which carrier has a temperature that is higher in comparison to the molding temperature, conveying the film through a climate-controlled zone, initiating the coagulation in a coagulation bath for the formation of a membrane structure, withdrawing the membrane structure from the carrier with a speed that is increased in comparison to the carrier speed, stabilizing, extracting, and subsequently drying the membrane.

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