Apparatus for static membrane filtration

US4490256A · kind A · utility

Assignee

• Sartorius AG · DE

Inventors

• Dietmar Nussbaumer · Göttingen, DE
• Horst Perl · Göttingen, DE
• Khuong To Vinh · Göttingen, DE

Key dates

• Filing date: Nov 25, 1983
• Grant date: Dec 25, 1984
• Expiry date: Nov 25, 2003

Classification

• Technology area (CPC B): Performing Operations; Transporting
• CPC primary: B01D63/16
• WIPO field: Chemical engineering
• WIPO sector: Chemistry

Abstract

An apparatus for static membrane filtration, including a cylindrical sample vessel containing a filtration medium and subjected to centrifugal acceleration. A plunger is mounted in sealed manner in the sample vessel, and is being movable therein. An asymmetrical membrane is attached at the end of the plunger facing the bottom of the sample vessel, with the filtration active side of the membrane facing towards the outside. The bottom of the sample vessel is provided with a sealable opening. The mean density of the plunger is greater than the density of the filtration medium, and the length of the plunger in cm is greater or equal to the reciprocal of the mean plunger density in g/cm.sup.3 reduced by 1.