Apparatus for producing USP or WFI purified water
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United States of America Patent
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Jan 20, 2004
Grant Date -
Jul 10, 2003
app pub date -
Jan 9, 2002
filing date -
Jan 9, 2002
priority date (Note) -
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Abstract
An improved water purification system for production of USP purified water and/or USP water for injection include backwashable, chlorine tolerant microfilter or ultrafilter for initial filtration of the feed water (10). The filtrate from the filter (18) is provided to a dechlorinator (18) prior to being subjected to an optional, reverse osmosis membrane unit (60) and then to a still (66) which discharges purified water at USP standards for purified water or water for injection.
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