Production of pyrogen controlled water
US6620314B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jun 14, 2002 |
| Grant date | Sep 16, 2003 |
| Priority date | — |
| Expiry date | Jun 14, 2022 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC02F1/444
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
A unit 1 for producing pyrogen controlled water on a small to medium factory scale comprises a number of charged ultrafiltration units 10 arranged in parallel. Orifice plates 15 are used to restrict and control the flow of deionized water to each filter 10. The filter units 10 are mounted on a frame 2 with a wheeled chassis 3 which may be pushed or moved by a forklift truck to a site where pyrogen controlled water is required. The unit 1 has an inlet line 4 for connection to a supply of deionized water and an outlet line 6 for connection to a user of pyrogen controlled water. The unit 1 may be purged with nitrogen from a supply 18. Sampling ports 17 in a common supply inlet 4 and a common outlet 6 ensure that the filtration efficiency can be closely monitored. The flow of water is monitored by a flowmeter 19 and pressure sensors 16 upstream of each filter facilitate a high level of control.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.