Filter, metal ion removal method, and metal ion removal device
AssigneeThermo Fisher Bioprocessing Inc.
InventorsMitsuaki Kobayashi, Yukihisa Okada
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Abstract
A filter includes a porous molded article, which is a sintered material of mixed powder containing activated carbon powder and thermoplastic resin powder. When water having a specific electrical resistance value of 18 MΩ·cm or greater is caused to pass through the filter at a space velocity of 1200 hr−1, a specific electrical resistance value of the water after being caused to pass through the filter is 13 MΩ·cm or greater. 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.
Claims8
A filter for the removal of metal ions in a treatment liquid, said filter comprising:
- a porous molded article, the porous molded article being a sintered material formed by sintering mixed powder consisting essentially of activated carbon powder and thermoplastic resin powder, wherein;
- an average particle diameter of the activated carbon powder is 1 μm to 25 μm, and a ratio d2/d1 of an average particle diameter d2 of the activated carbon powder to an average particle diameter d1 of the thermoplastic resin powder is 10 or less;
- the content of the activated carbon powder in the mixed powder is 300 parts by mass or more and 900 parts by mass or less, with respect to 100 parts by mass of the content of the thermoplastic resin powder;
- and
- when water having a specific electrical resistance value of 18 MΩ·cm or greater is caused to pass through the filter at a space velocity of 1200 hr−1, a specific electrical resistance value of the water after being caused to pass through the filter is 13 MΩ·cm or greater.
Dependencies are inferred from the claim text.