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AssigneeChiyoda Corporation
InventorsZhixiong You, Yoichi Umehara, Masayo Shinohara, Kazushige Kawamura, Takeshi Minami
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Disclosed herein is a water treatment process for efficiently removing oils from oil-containing water. The water treatment process is a method for treating oil-containing water, comprising the steps of: preparing an oil-adsorbing material that is made of a lipophilic resin such as a pyridine resin and that has many pores in its surface and bears hydrophilic groups on an inner surface of the pores; and bringing oil-containing water into contact with the surface of the oil-adsorbing material. The step of preparing an oil-adsorbing material includes the step of converting some of hydrophobic groups, such as nitrogen-containing aromatic rings, on the inner surface of the pores to hydrophilic groups such as quaternized amine or sulfonic acid.
A method for treating oil-containing water, comprising the steps of:
A method for treating oil-containing water, comprising the steps of:
Porous particles that are made of lipophilic resin and that have many pores in their surface, the porous particles having hydrophilic groups on an inner surface of the pores.
Porous particles that are made of lipophilic resin and that have many pores in their surface, wherein the resin has hydrophobic groups and hydrophilic groups, and a ratio of the hydrophilic groups is 5.3 moles or more but 67 moles or less per 100 moles of the hydrophobic groups, the porous particles having hydrophilic groups on an inner surface of the pores.
Dependencies are inferred from the claim text.