Oil-water separation apparatus and drainage system

Patent metadata

Field	Value
Publication number	US-10399868-B2
Application number	US-201515329393-A
Country	US
Kind code	B2
Filing date	Jul 29, 2015
Priority date	Jul 30, 2014
Publication date	Sep 3, 2019
Grant date	Sep 3, 2019

Abstract

The oil-water separation apparatus includes an oil-water-separating member configured to separate a liquid mixture containing water and oil into moisture and oil, and a liquid reservoir subdivided into an upper region and a lower region by the oil-water-separating member. The oil-water separation apparatus filters the liquid mixture by gravity. The oil-water-separating member includes a base which includes a channel for the liquid mixture. The oil-water-separating member is formed in the base, and the oil-water-separating member contains a fluorine compound which has an oil-repellency-imparting group and a hydrophilicity-imparting group. A drain port for discharging the moisture is formed in the lower region of the liquid reservoir.

First claim

The invention claimed is:

1. An oil-water separation apparatus, comprising:
an oil-water separation filter medium which includes a base and an oil-water-separating member which is formed on the base and is configured to separate a liquid mixture containing water and oil into moisture and oil,
wherein
the oil-water-separating member contains a fluorine compound which has an oil-repellency-imparting group and a hydrophilicity-imparting group, and
a form of the base is fibrous organic matter, particulate organic matter, fibrous inorganic matter, particulate inorganic matter, a porous medium of organic matter, or a porous medium of inorganic matter,
and wherein
the fluorine compound contains one or more compounds having a structure represented by the following formulas (1) to (4),

in the formulas (1) and (2), a nitrogen-containing perfluoroalkyl group formed from Rf 1 and Rf 2 and a nitrogen-containing perfluoroalkylene group formed from Rf 3 constitute the oil-repellency-imparting group,
each of Rf 1 and Rf 2 in the formulas (1) and (2) is a straight-chain or branched perfluoroalkyl group which is the same as or different from each other, and has 1 to 6 carbon atoms, and Rf 3 is a straight-chain or branched perfluoroalkylene group which has 1 to 6 carbon atoms,
in the formulas (3) and (4), a nitrogen-containing perfluoroalkylene group formed from Rf 4 , Rf 5 , and Rf 6 , further, Z constitutes the oil-repellency-imparting group,
each of Rf 4 , Rf 5 , and Rf 6 in the formulas (3) and (4) is a straight-chain or branched perfluoroalkylene group which is the same as or different from each other, and has 1 to 6 carbon atoms, and Z includes any of an oxygen atom, a nitrogen atom, a CF 2 group, and a CF group,
in the formulas (2) and (4), R is a linking group which is a bivalent organic group, and
in the formulas (1) to (4), X is any one hydrophilicity-imparting group selected from the group consisting of an anion type, a cation type, and an amphoteric type,
in a case where the hydrophilicity imparting group X is the anion type, the X has “—CO 2 M 1 ”, “—SO 3 M 1 ”, “—OSO 2 M 1 ”, “—OP(OH)O 2 M 1 ”, “—OPO 3 M 1 2 ”, “═O 2 PO 2 M 1 ”, or “PO(OH) y (OM 1 ) 2−y ”(wherein M 1 indicates alkali metal, alkaline-earth metal, Mg, and Al, and R 1 R 2 R 3 R 4 N + ; R 1 to R 4 indicate straight chain or branched alkyl groups which are independent from each other, and have hydrogen atoms or 1 to 20 carbon atoms),
in a case where the hydrophilicity-imparting group X is the cation type, the X has “—N + R 5 R 6 R 7 Cl 31 ”,“—N + R 5 R 6 R 7 Br 31 ”,“—N + R 5 R 6 R 7 I − ”,“—N + R 5 R 6 R 7 .CH 3 SO 3 31 ”,“—N + R 5 R 6 R 7 R 7 SO 4 31 ”,“—N + R 5 R 6 R 7 NO 3 − ”, “(—N + R 5 R 6 R 7 ) 2 CO 3 2− ”, or “(—N + R 5 R 6 R 7 ) 2 SO 4 2− ” at the termination (R 5 to R 7 are straight chain or branched alkyl groups which are independent from each other, and have hydrogen atoms or 1 to 20 carbon atoms), and
in a case where the hydrophilicity-imparting group X is the amphoteric type, the X has a carboxy betaine type of “—N + R 8 R 9 (CH 2 ) n CO 2 − ”, a sulfobetaine type of “—N + R 8 R 9 (CH 2 ) n SO 3 − ”, an amine oxide type of “—N + R 8 R 9 O − ”, or a phosphobetaine type of “—OPO 3 − (CH 2 ) n N + R 8 R 9 R 10 ” at the termination (n is an integer of 1 to 5, R 8 and R 9 indicates an alkyl group having a hydrogen atom or 1 to 10 carbon atoms, and R 10 indicates an alkyl group having a hydrogen atom or 1 to 10 carbon atoms or an alkylene group having 1 to 10 carbon atoms).

2. The oil-water separation apparatus according to claim 1 , wherein the oil-water-separating member is bound to the base by an organic binder or an inorganic binder.

3. The oil-water separation apparatus according to claim 1 , further comprising:
a liquid reservoir which is subdivided into an upper region and a lower region by the oil-water-separating member,
wherein a water drain port for discharging the moisture is formed in the lower region of the liquid reservoir, and filtering the liquid mixture is performed by gravity.

4. The oil-water separation apparatus according to claim 3 , wherein an oil drain port for discharging the oil is formed in the upper region of the liquid reservoir.

5. The oil-water separation apparatus according to claim 1 , wherein
the base has a bag shape of which one end side is opened, and is formed from a porous medium which includes at least a channel through which the moisture is allowed to pass.

6. The oil-water separation apparatus according to claim 5 , wherein
a support member through which at least the moisture is allowed to pass is disposed on an outer surface side of the oil-water separation filter medium so as to overlap the outer surface side of the oil-water separation filter medium, and
the support member supports the oil-water separation filter medium from the outer surface side.

7. The oil-water separation apparatus according to claim 1 , further comprising:
a holding portion for holding the oil-water separation filter medium,
wherein the base is formed from a material including a channel through which at least the moisture passes.

8. The oil-water separation apparatus according to claim 7 , wherein
an edge of the base is attachable and detachable to and from the holding portion.

9. The oil-water separation apparatus according to claim 1 , wherein,
the base is a bag body, and
the bag body is formed from a material including a channel through which at least the moisture is allowed to pass, and is filled with weights.

10. The oil-water separation apparatus according to claim 9 , further comprising:
a drainage net which is extended from one end portion of the bag body, and includes the oil-water-separating member,
wherein the drainage net is formed from a material including a channel through which at least moisture is allowed to pass.

11. The oil-water separation apparatus according to claim 1 , wherein,
the base forms a curtain, and has a float for floating the base on a surface of water,
the curtain is attached to a lower portion of the float, and
the curtain is formed from a material including a channel through which at least the moisture is allowed to pass.

12. The oil-water separation apparatus according to claim 1 , wherein,
the base is formed from a porous base including multiple pores which penetrate a space between one surface into which the liquid mixture flows, and another surface which faces the one surface,
an opening diameter of the pore is from 0.1 μm to 180 μm, and
the oil-water-separating member is formed on a surface of the pore.

13. The oil-water separation apparatus according to claim 12 , wherein,
the pore is directed from the one surface toward the other surface, and
the opening diameter of the pores is reduced by stages or continuously.

14. The oil-water separation apparatus according to claim 1 , wherein
the oil-water separation apparatus constitutes a gathering machine,
at least a preceding-stage reservoir and a subsequent-stage reservoir are arranged in series from an inflow side into which the liquid mixture flows, toward an outflow side by which the moisture obtained by oil-water separation flows out, and
the oil-water separation filter medium is provided so as to be attachable and detachable to and from at least one of the preceding-stage reservoir or the subsequent-stage reservoir.

15. The oil-water separation apparatus according to claim 1 , where

Assignees

• Mitsubishi Materials Corp
• Mitsubishi Mat Electronic Chemicals Co Ltd

Inventors

• Sato Kosei
• Fujita Masato
• Uotani Masakazu
• Koshiyama Hiroshi
• Kamiya Takeshi
• Honda Tsunetoshi
• Imai Hiroyuki
• Takano Daisuke

Classifications

• B01D2239/0421

  Rendering the filter material hydrophilic · CPC title

• C08L101/00

  Compositions of unspecified macromolecular compounds · CPC title

• B01D2239/086

  Binders between particles or fibres · CPC title

• B01D17/10

  with stationary filtering elements · CPC title

• B01D2239/0613

  Woven · CPC title