The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jul. 17, 2001
Filed:
Jun. 30, 1999
Method for producing hollow fibrous membranes for microfiltration, ultrafiltration or gas separation
Rinse Alle Terpstra, Geldrop, NL;
Joost Petrus Gerardus Maria Van Eijk, Berkel-Enschot, NL;
Abstract
A method for producing hollow fibrous membranes includes the steps of mixing a ceramic powder with a binder to form a paste having a sufficient viscosity to be extruded without heating, characterized in that said binder is a binder dissolved in water or another simple solvent or a thermosetting binder or an inorganic binder or a combination of said binders; extruding the paste to the form of hollow fibers by means of a spinneret; supporting the hollow fibers leaving the spinneret on a roller conveyor comprising a pair of rollers which rotate in opposite directions away from each other where the fibers contact the rollers; and sintering the hollow fibers. These membranes are used for microfiltration, ultrafiltration or gas separation. The fibrous membranes have an external diameter of 0.1-3 mm and a wall thickness of 10-500 &mgr;m.