Plastic and nonmetallic article shaping or treating: processes – Forming continuous or indefinite length work – By casting liquids on a solid supporting or shaping surface
Patent
1982-09-10
1984-05-29
Czaja, Donald E.
Plastic and nonmetallic article shaping or treating: processes
Forming continuous or indefinite length work
By casting liquids on a solid supporting or shaping surface
264212, 26433111, 521 27, 525906, B29D 706
Patent
active
044514247
ABSTRACT:
Polysulfone cast films, including polyethersulfone cast films, are partially gelled with mineral acid prior to or during the conventional water gelation to control the porosity of and improve the productivity of reverse osmosis and ultrafiltration membranes thus produced. The partial gelation may be carried out prior to the water gelation by contacting the cast film with the mineral acid in a gaseous or aqueous form and the gaseous form may be diluted with air. The partial gelation may, in different embodiments, be carried out simultaneously with the conventional gelation by dissolving the mineral acid in the gelation liquid.
REFERENCES:
patent: 3444286 (1969-05-01), King et al.
patent: 4026977 (1977-05-01), Bourganel
Kutowy Oleh
Sourirajan Srinivasa
Thayer William L.
Tweddle Thomas A.
Canadian Patents & Development Limited
Czaja Donald E.
Fischbach V.
Lemon Francis W.
LandOfFree
Method of gelling cast, polysulfone membranes does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Method of gelling cast, polysulfone membranes, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method of gelling cast, polysulfone membranes will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1396679