Filtering device, purification device, chemical liquid manufacturing device, filtered substance to be purified, chemical liquid, and actinic ray-sensitive or radiation-sensitive resin composition

Patent metadata

Field	Value
Publication number	US-11559758-B2
Application number	US-202016745493-A
Country	US
Kind code	B2
Filing date	Jan 17, 2020
Priority date	Jul 26, 2017
Publication date	Jan 24, 2023
Grant date	Jan 24, 2023

Abstract

An object of the present invention is to provide a filtering device which makes it possible to obtain a chemical liquid having excellent performance and enables filter media to have sufficiently long pot life. Another object of the present invention is to provide a purification device, a chemical liquid manufacturing device, a filtered substance to be purified, a chemical liquid, and an actinic ray-sensitive or radiation-sensitive resin composition. A filtering device according to an embodiment of the present invention has a first filter unit including a first filter, which satisfies at least one condition selected from the group consisting of following conditions 1 to 3, and a housing accommodating the first filter and a second filter unit including a second filter different from the first filter and a housing accommodating the second filter, in which the first filter unit and the second filter unit are independently disposed in a pipe line through which a substance to be purified is supplied.Condition 1: the filter has a filter medium including two or more layers containing materials different from each other.Condition 2: the filter has a filter medium including two or more layers having different pore structures.Condition 3: the filter has a filter medium including one layer in which different materials are mixed together.

First claim

What is claimed is:

1. A filtering device comprising:
a first filter unit including a first filter, which satisfies at least one condition selected from the group consisting of the following conditions 1 to 3, and a housing accommodating the first filter; and
a second filter unit including a second filter different from the first filter and a housing accommodating the second filter,
wherein the first filter unit and the second filter unit are independently disposed in a pipe line through which a substance to be purified is supplied,
condition 1: the first filter has a filter medium including two or more layers containing materials different from each other,
condition 2: the first filter has a filter medium including two or more layers having different pore structures,
condition 3: the first filter has a filter medium including one layer in which different materials are mixed together, and
wherein in a cumulative pore distribution of the filter medium that the first filter has, a difference between a size of cumulative 10% and a size of cumulative 75% is equal to or greater than 3 nm.

2. The filtering device according to claim 1 ,
wherein a ratio of a size of cumulative 75% to a size of cumulative 10% is 2.0 to 20.0.

3. The filtering device according to claim 1 ,
wherein a pore size of a filter medium that the second filter has is equal to or smaller than 200 nm.

4. The filtering device according to claim 1 ,
wherein a pore size of a filter medium that the second filter has is equal to or smaller than 100 nm.

5. The filtering device according to claim 1 ,
wherein a pore size of a filter medium that the second filter has is equal to or smaller than a pore size of the filter medium that the first filter has.

6. The filtering device according to claim 1 ,
wherein the second filter unit is on a secondary side of the first filter unit, and
a pore size of a filter medium that the second filter has is equal to or smaller than a pore size of the filter medium that the first filter has.

7. The filtering device according to claim 1 ,
wherein the second filter unit is disposed on a primary side of the first filter unit.

8. The filtering device according to claim 7 ,
wherein a pore size of a filter medium that the second filter has is equal to or greater than a pore size of the filter medium that the first filter has.

9. The filtering device according to claim 1 ,
wherein the second filter unit is further disposed on a secondary side of the first filter unit,
a pore size of a filter medium included in the second filter unit disposed on the secondary side is equal to or smaller than a pore size of the filter medium that the first filter has, and
the filter medium that the first filter has includes a layer containing a base material having undergone a surface treatment.

10. The filtering device according to claim 1 ,
wherein the first filter has a filter medium including two or more layers containing materials different from each other.

11. The filtering device according to claim 1 ,
wherein a filter medium that the second filter has contains the same material as the material of any of the two or more layers.

12. The filtering device according to claim 1 ,
wherein in a relationship among Hansen solubility parameters δDp, δPp, and δHp and an interaction radius R0 of at least one kind of filter medium selected from the group consisting of the filter medium that the first filter has and a filter medium that the second filter has and Hansen solubility parameters δDs, δPs, and δHs of the substance to be purified, provided that Ra is represented by an equation of Ra 2 =4(δDs−δDp) 2 +(δPs−δPp) 2 +(δHs−δHp) 2 , a ratio of Ra to R0 is equal to or lower than 1.0.

13. The filtering device according to claim 1 ,
wherein the first filter has a filter medium including two or more layers having pore structures different from each other.

14. The filtering device according to claim 1 ,
wherein the first filter has a filter medium including a layer having pore structures different from each other in a thickness direction.

15. The filtering device according to claim 1 ,
wherein the filter medium that the first filter has includes a layer containing a base material having an ion exchange group.

16. The filtering device according to claim 1 ,
wherein the filter medium that the first filter has includes a layer containing a base material having undergone a surface treatment selected from the group consisting of a chemical modification treatment and a plasma treatment and a layer containing a base material having not undergone a surface treatment.

17. The filtering device according to claim 1 ,
wherein at least one kind of filter selected from the group consisting of the first filter and the second filter is capable of being backwashed.

18. The filtering device according to claim 1 ,
wherein the filter medium that the first filter has and a filter medium that the second filter has contain at least one kind of material selected from the group consisting of nylon, polyethylene, polypropylene, polyfluorocarbon, cellulose, diatomite, polystyrene, glass, and polysulfone.

19. The filtering device according to claim 1 ,
wherein at least one kind of filter medium selected from the group consisting of the filter medium that the first filter has and a filter medium that the second filter has includes at least one kind of layer selected from the group consisting of a nanoporous membrane layer and a nanofiber layer.

20. The filtering device according to claim 19 ,
wherein the filter medium that the first filter has includes at least the nanoporous membrane layer and the nanofiber layer.

21. The filtering device according to claim 1 ,
wherein the filter medium that the first filter has includes a non-sieving membrane layer having a pore size distribution of 10 to 50 nm, a sieving membrane layer having a pore size distribution of 2 to 50 nm, and a nylon nanofiber layer.

22. The filtering device according to claim 21 ,
wherein the nylon nanofiber layer is between the non-sieving membrane layer and the sieving membrane layer.

23. The filtering device according to claim 21 ,
wherein the non-sieving membrane layer is between the sieving membrane layer and the nylon nanofiber layer.

24. The filtering device according to claim 21 ,
wherein the sieving membrane layer is between the non-sieving membrane layer and the nylon nanofiber layer.

25. The filtering device according to claim 18 ,
wherein the first filter further includes a porous support constituted with one layer or two or more layers.

26. The filtering device according to claim 1 ,
wherein the first filter is capable of being backwashed by causing a washing solution to flow from the secondary side of the first filter unit to the primary side of the first filter unit.

27. A purification device comprising:
the filtering device according to claim 1 ; and
a tank which is on a primary side of the filtering device and capable of storing a substance to be purified.

28. The purification device according to claim 27 ,
wherein a secondary side of the first filter unit is connected to the tank through a pipe line, and
a filtered substance to be purified having been filtered through at least the first filter is capable of being sent back to the tank through the pipe line.

Assignees

• Fujifilm Corp

Inventors

• Shimizu Tetsuya
• Kamimura Tetsuya

Classifications

• B01D2239/065

  More than one layer present in the filtering material · CPC title

• B01D63/065

  on the outer surface thereof · CPC title

• B01D61/027

  Nanofiltration · CPC title

• B01D29/23

  arranged for outward flow filtration · CPC title

• B01D29/58 Primary

  arranged concentrically or coaxially · CPC title