Device and process for removing pyrogens from aqueous solutions
US4261834A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | May 18, 1978 |
| Grant date | Apr 14, 1981 |
| Priority date | — |
| Expiry date | May 18, 1998 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB01D61/145
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
Pyrogens can be effectively removed from an aqueous solution by passing a stream of the solution through a device comprising at least two anisotropic ultrafiltration membranes positioned in series, said membranes having nominal molecular weight limits less than the molecular weight of the pyrogens, including aggregates or micelles thereof, to be removed, wherein at least one membrane is juxtaposed with at least one other membrane so that substantially all of the skin surface of one membrane is in intimate contact with substantially all of the skin surface of the other membrane and wherein the edges of one membrane are sealed to the corresponding edges of the other membrane.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.