Apparatus and method for controlling resistivity of ultra...

Details Apparatus and method for controlling resistivity of ultra... Apparatus and method for controlling resistivity of ultra...

2005-04-26

2005-04-26

Hoey, Betsey Morrison (Department: 1724)

Liquid purification or separation

Processes

Chemical treatment

C210S192000, C210S198100, C210S500230, C210S900000, C261S075000

Reexamination Certificate

active

06884359

ABSTRACT:
An apparatus for controlling the resistivity of ultra pure water, including a housing to house a gas permeable membrane, an inlet for untreated ultra pure water which communicates with an ultra pure water path, and an outlet for resistivity-controlled ultra pure water which communicates with the ultra pure water path. The gas permeable membrane divides the interior of the housing into the ultra pure water path and a mixed gas path. A mixed gas is selected from the group consisting of a mixed gas including carbon dioxide and a gas having a lower resistivity controlling ability than carbon dioxide and a mixed gas including ammonia and a gas having a lower resistivity controlling ability than ammonia. The gas permeable membrane is capable of supplying carbon dioxide or ammonia to the untreated ultra pure water at a concentration equal to or more than 90% of the equilibrium concentration.

REFERENCES:
patent: 5188257 (1993-02-01), Plester
patent: 6158721 (2000-12-01), Katou et al.
patent: 59-173184 (1984-01-01), None
patent: 59-196706 (1984-11-01), None
patent: 59-229320 (1984-12-01), None
patent: 60-027603 (1985-02-01), None
patent: 61-101206 (1986-05-01), None
patent: 61-101227 (1986-05-01), None
patent: 06-210146 (1994-08-01), None
patent: 7-60082 (1995-07-01), None
patent: 10-212105 (1998-11-01), None
patent: 11-139804 (1999-05-01), None
patent: 2000 - 159504 (2000-06-01), None

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