Filter and metal ion removal device
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United States of America Patent
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Sep 26, 2023
Grant Date -
Jul 29, 2021
app pub date -
May 29, 2019
filing date -
May 31, 2018
priority date (Note) -
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Abstract
To provide a filter capable of efficiently removing metal ions in a treatment liquid, and capable of easily obtaining a solution having an extremely low metal ion content. A depth filter includes a porous molded article. The porous molded article is a sintered material of mixed powder or a swollen material of the sintered material. The mixed powder contains dried gel powder and thermoplastic resin powder. The dried gel powder contains an ion exchange resin including a sulfonic acid group, and a nitrogen-containing chelating resin.
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