Pyrogens separations by ceramic ultrafiltration
First Claim
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1. A method of separating pyrogens comprising passing pyrogen-containing liquid through a zirconium oxide membrane on ceramic support, wherein said zirconium oxide membrane has a nominal pore size in the range of about 20Å
- to 100Å
.
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Abstract
The method of the present invention for separating pyrogens includes passing a pyrogen-containing liquid through a zirconium oxide membrane on a ceramic support. The membrane on ceramic support preferably includes a porous sintered zircondium oxide membrane on alpha-alumina support.
188 Citations
18 Claims
- 1. A method of separating pyrogens comprising passing pyrogen-containing liquid through a zirconium oxide membrane on ceramic support, wherein said zirconium oxide membrane has a nominal pore size in the range of about 20Å
-
12. A method of purifying a liquid to remove pyrogens comprising passing pyrogen-containing liquid through a ceramic membrane having a nominal pore size in the range of about 20Å
- to 100Å and
further having a flux rate or permeability higher than about 40 L/hr/m2 / atm to remove pyrogens without substantial fouling of the membrane through a run time of at least 60 minutes. - View Dependent Claims (13, 14, 15, 16, 17)
- to 100Å and
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18. A method of separating pyrogens comprising:
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(a) providing an acid depyrogenated, ultrafiltration membrane of porous sintered zirconia oxide having a nominal pore size in the range of about 20Å
to 100Å
on alpha-alumina support by treating said membrane on support with nitric acid; and(b) passing pyrogen-containing water by cross-flow or tangential filtration over and through said zirconia oxide membrane on alpha-alumina support to separate pyrogens and form a non-pyrogenic permeate.
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Specification