# US 2016/0257578 A1 · Resin-made porous particles and water treatment process using same > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2016/0257578 A1 - Document ID: US20160257578A1 - Status: Published application - Kind: A1 - Application number: 15/024,585 - Filed: 2014-07-15 - Published: 2016-09-08 - Earliest claimed: 2013-09-26 - Assignees: Chiyoda Corporation - Applicants: Chiyoda Corporation - Inventors: Zhixiong You; Yoichi Umehara; Masayo Shinohara; Kazushige Kawamura; Takeshi Minami - Web page: https://patentgrep.com/patent/US20160257578A1 ## CPC - C02F 1/285: {using synthetic organic sorbents} - B01J 20/261: {obtained by reactions only involving carbon to carbon unsaturated bonds (macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds per se C08F)} - B01J 20/264: {derived from different types of monomers, e.g. linear or branched copolymers, block copolymers, graft copolymers} - B01J 20/267: {Cross-linked polymers} - B01J 20/3285: {Coating or impregnation layers comprising different type of functional groups or interactions, e.g. different ligands in various parts of the sorbent, mixed mode, dual zone, bimodal, multimodal, ionic or hydrophobic, cationic or anionic, hydrophilic or hydrophobic} - B01J 20/3425: {of sorbents or filter aids comprising organic materials} - B01D 17/0202: {by ab- or adsorption} - C02F 2101/32: Hydrocarbons, e.g. oil - C02F 2101/322: {Volatile compounds, e.g. benzene} - C02F 2101/345: {Phenols} - C02F 2103/10: from quarries or from mining activities - C02F 2103/36: from the manufacture of organic compounds - C02F 2103/365: {from petrochemical industry (e.g. refineries)} - C02F 2303/16: Regeneration of sorbents, filters - C02F: TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE (separation in general B01D; special arrangements on waterborne vessels of installations for treating water, waste water or sewage, e.g. for producing fresh water, B63J; adding materials to water to prevent corrosion C23F; treating radioactively-contaminated liquids G21F9/04; regeneration of reactants for recirculation into processes, see the relevant places for the processes) - B01J: CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS - B01D: SEPARATION (separating solids from solids by wet methods B03B, B03D; by pneumatic jigs or tables B03B; by other dry methods B07; magnetic or electrostatic separation of solid materials from solid materials or fluids, separation by high-voltage electric fields B03C; centrifuges, vortex apparatus B04; presses per se for squeezing-out liquid from liquid-containing material B30B9/02; treatment of water C02F, e.g. softening by ion-exchange C02F1/42; {arrangements of air intake cleaners in gas turbine plants F02C7/05} ; arrangements or mounting of filters in air-conditioning, air-humidification or ventilation F24F13/28) ## Abstract 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. ## Claims ### Claim 1 A method for treating oil-containing water, comprising the steps of: preparing an oil-adsorbing material that is made of a lipophilic 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. ### Claim 2 (depends on 1) The method for treating oil-containing water according to claim 1, wherein the step of preparing the oil-adsorbing material includes the step of converting some of hydrophobic groups on the inner surface of the pores to hydrophilic groups. ### Claim 3 (depends on 1) The method for treating oil-containing water according to claim 1, wherein the hydrophilic groups are quaternized amine or sulfonic acid. ### Claim 4 (depends on 2) The method for treating oil-containing water according to claim 2, wherein the hydrophobic groups are nitrogen-containing aromatic rings. ### Claim 5 (depends on 2) The method for treating oil-containing water according to claim 2, wherein the step of converting to hydrophilic groups is performed by bringing the resin into contact with an alkyl halide or a hydrohalic acid to quaternize some of nitrogen-containing aromatic rings. ### Claim 6 (depends on 2) The method for treating oil-containing water according to claim 2, wherein the step of converting to hydrophilic groups is performed by bringing the resin into contact with concentrated sulfuric acid or chlorosulfonic acid to sulfonate some of aromatic rings. ### Claim 7 (depends on 1) The method for treating oil-containing water according to claim 1 wherein the oil-adsorbing material is regenerated using a lower alcohol. ### Claim 8 A method for treating oil-containing water, comprising the steps of: preparing porous particles that are made of lipophilic resin having hydrophobic groups and that have many pores in their surface and; converting 5% or more but 40% or less of all the hydrophobic groups to hydrophilic groups to introduce hydrophilic groups onto an inner surface of the pores; and bringing oil-containing water into contact with the surface of the porous particles. ### Claim 9 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. ### Claim 10 (depends on 9) The porous particles according to claim 9, wherein the hydrophilic groups are quaternized amine or sulfonic acid. ### Claim 11 (depends on 9) The porous particles according to claim 9, wherein the resin has nitrogen-containing aromatic rings. ### Claim 12 (depends on 9) The porous particles according to claim 9, wherein the resin is a pyridine resin. ### Claim 13 (depends on 9) The porous particles according to claim 9, wherein the resin has a cross-linked structure. ### Claim 14 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. ### Claim 15 (depends on 2) The method for treating oil-containing water according to claim 2, wherein the hydrophilic groups are quaternized amine or sulfonic acid. ### Claim 16 (depends on 2) The method for treating oil-containing water according to claim 2 wherein the oil-adsorbing material is regenerated using a lower alcohol. ### Claim 17 (depends on 3) The method for treating oil-containing water according to claim 3 wherein the oil-adsorbing material is regenerated using a lower alcohol. ### Claim 18 (depends on 10) The porous particles according to claim 10, wherein the resin is a pyridine resin. ### Claim 19 (depends on 11) The porous particles according to claim 11, wherein the resin is a pyridine resin. ### Claim 20 (depends on 10) The porous particles according to claim 10, wherein the resin has a cross-linked structure.