Filter medium, method for producing filter medium, water treatment module, and water treatment device

• US 10,294,125 B2
• Filed: 07/30/2015
• Issued: 05/21/2019
• Est. Priority Date: 07/30/2014
• Status: Active Grant

• Current Assignee: Mitsubishi Materials Corporation, Mitsubishi Materials Electronic Chemicals Co., Ltd. (Mitsubishi Materials Corporation)
• Original Assignee: Mitsubishi Materials Corporation, Mitsubishi Materials Electronic Chemicals Co., Ltd. (Mitsubishi Materials Corporation)
• Inventors: Fujita, Masato, Uotani, Masakazu, Koshiyama, Hiroshi, Kamiya, Takeshi, Honda, Tsunetoshi, Takano, Daisuke
• Primary Examiner(s): Kim, John
• Application Number:
  US15/329,841
• Publication Number:
  US 20170247265A1
• Time in Patent Office: 1,391 Days
• CPC Class Codes: B01D 17/045 with coalescers
• CPC Class Codes: B01D 17/10 with stationary filtering elements
• CPC Class Codes: B01D 2239/0421 Rendering the filter material hydrophilic
• CPC Class Codes: B01D 2239/086 Binders between particles or fibres
• CPC Class Codes: C02F 1/40 Devices for separating or removing fatty or oily substances or similar floating material cleaning or keeping clear the surface of open water from oil or like materials E02B15/04; devices in sewers for separating liquid or solid substances from sewage E03F5/14, e.g. for use in drains leading to the sewer E03F5/16
• CPC Class Codes: C02F 2101/32 Hydrocarbons, e.g. oil
• CPC Class Codes: C07C 227/08 by reaction of ammonia or amines with acids containing functional groups
• CPC Class Codes: C07C 227/18 by reactions involving amino or carboxyl groups, e.g. hydrolysis of esters or amides, by formation of halides, salts or esters
• CPC Class Codes: C07C 229/06 having only one amino and one carboxyl group bound to the carbon skeleton
• CPC Class Codes: C07C 231/12 by reactions not involving the formation of carboxamide groups
• CPC Class Codes: C07C 233/36 having the carbon atom of the carboxamide group bound to a hydrogen atom or to a carbon atom of an acyclic saturated carbon skeleton
• CPC Class Codes: C07C 233/37 having the carbon atom of the carboxamide group bound to an acyclic carbon atom of a saturated carbon skeleton containing rings
• CPC Class Codes: C07C 303/02 of sulfonic acids or halides thereof
• CPC Class Codes: C07C 303/22 from sulfonic acids, by reactions not involving the formation of sulfo or halosulfonyl groups; from sulfonic halides by reactions not involving the formation of halosulfonyl groups
• CPC Class Codes: C07C 303/40 by reactions not involving the formation of sulfonamide groups
• CPC Class Codes: C07C 309/04 containing only one sulfo group
• CPC Class Codes: C07C 311/03 having the nitrogen atoms of the sulfonamide groups bound to hydrogen atoms or to acyclic carbon atoms
• CPC Class Codes: C07C 311/10 of a saturated carbon skeleton containing rings
• CPC Class Codes: C08K 5/19 Quaternary ammonium compounds
• CPC Class Codes: C08K 5/20 Carboxylic acid amides
• CPC Class Codes: C08K 5/3415 : Five-membered rings
• CPC Class Codes: C08K 5/3462 : Six-membered rings
• CPC Class Codes: C08K 5/357 : Six-membered rings
• CPC Class Codes: C08K 5/42 : Sulfonic acids; Derivatives thereof
• CPC Class Codes: C08K 5/435 : Sulfonamides
• CPC Class Codes: C09D 129/14 : Homopolymers or copolymers of acetals or ketals obtained by polymerisation of unsaturated acetals or ketals or by after-treatment of polymers of unsaturated alcohols
• CPC Class Codes: C09D 167/00 : Coating compositions based on polyesters obtained by reactions forming a carboxylic ester link in the main chain based on polyester-amides C09D177/12; based on polyester-imides C09D179/08; Coating compositions based on derivatives of such polymers
• CPC Class Codes: C09D 201/00 : Coating compositions based on unspecified macromolecular compounds
• CPC Class Codes: C09D 5/00 : Coating compositions, e.g. paints, varnishes or lacquers, characterised by their physical nature or the effects produced electrically insulating plastics, resins or waxes H01B3/30; Filling pastes
• CPC Class Codes: C09D 7/63 : organic
• CPC Class Codes: D06M 13/408 : Acylated amines containing fluorine atoms; Amides of perfluoro carboxylic acids
• CPC Class Codes: D06M 13/438 : Sulfonamides ; Sulfamic acids
• CPC Class Codes: D06M 13/461 : Quaternised amin-amides from polyamines or heterocyclic compounds or polyamino-acids

Abstract

The filter medium is a filter medium which uses a liquid containing oil and water as a separation target, and has a channel for the liquid. The filter medium includes a base constituting the channel, and one or more of nitrogen-containing fluorine compounds which are provided on at least a portion of a surface of the channel. The nitrogen-containing fluorine compound includes an oil-repellency imparting group and any one hydrophilicity imparting group selected from a group consisting of an anion type, a cation type, and an amphoteric type, in a molecule.

Claims

1. A filter medium which uses a liquid containing oil and water as a separation target, and has a channel for the liquid, the medium comprising:

a base constituting the channel; and

one or more of nitrogen-containing fluorine compounds which are provided on at least a portion of a surface of the channel and are represented by the following formulas (1) to (4),

2. The filter medium according to claim 1, wherein

the one or more of nitrogen-containing fluorine compounds are bonded to the surface of the channel by one or both of an organic binder and an inorganic binder.

3. The filter medium according to claim 2, wherein

the organic binder contains any of a thermoplastic resin, a thermoplastic elastomer, a thermosetting resin, and an UV curable resin.

4. The filter medium according to claim 2, wherein

the inorganic binder contains any of a silane compound and water glass.

5. The filter medium according to claim 1, wherein

the base is a fiber assembly, and the channel is configured by a gap between fibers.

6. The filter medium according to claim 5, wherein

the fiber includes an organic fiber selected from a group consisting of synthetic fiber, natural fiber, and cellulosic fiber, or an inorganic fiber selected from a group consisting of metallic fiber, carbon fiber, glass fiber, and ceramics fiber.

7. The filter medium according to claim 1, wherein

the base is an aggregate of particles, and the channel is configured by a gap between the particles.

8. The filter medium according to claim 7, wherein

the particle includes an inorganic particle selected from a group consisting of anthracite, sand, gravel, garnet, glass, ceramics, and metal.

9. The filter medium according to claim 1, wherein

the base is a porous medium having a continuous pore, and the channel is configured by the continuous pore.

10. The filter medium according to claim 9, wherein

the porous medium is an organic porous medium selected from a group consisting of porous fluororesin, porous polypropylene, porous polyethylene, porous polyester, porous polysulfone, porous polyethersulfone, porous vinylon, porous nylon, porous polyvinyl alcohol, porous vinyl copolymer containing polyalkylene oxide chain, and porous cellulose, or an inorganic porous medium selected from a group consisting of active carbon, ceramics, sintered metal, silica, alumina, zeolite, calcium carbonate, and clay mineral.

11. The filter medium according to claim 1, wherein

the width of the channel is 0.1 to 180 μ

m.

12. A method for producing the filter medium according to claim 1, the method comprising:

a process of preparing a coating liquid in which one or more nitrogen-containing fluorine compounds represented by the formulas (1) to (4) are dispersed or dissolved in water, an organic solvent, or a solvent mixture of water and an organic solvent;

a process of coating at least a portion of the surface of the base with the coating liquid in which the nitrogen-containing fluorine compound is dispersed or dissolved; and

a process of removing a dispersion medium or a solvent by drying, and forming a coating film on at least a portion of the surface of the base.

13. The method for producing a filter medium according to claim 12, wherein

the coating liquid contains an organic binder or an inorganic binder.

14. A water treatment module comprising:

the filter medium according to claim 1.

15. A water treatment device comprising:

the water treatment module according to claim 14.