CN101549233A - Devices and methods for chemical reactive filtration - Google Patents
Devices and methods for chemical reactive filtration Download PDFInfo
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- CN101549233A CN101549233A CNA2008101253717A CN200810125371A CN101549233A CN 101549233 A CN101549233 A CN 101549233A CN A2008101253717 A CNA2008101253717 A CN A2008101253717A CN 200810125371 A CN200810125371 A CN 200810125371A CN 101549233 A CN101549233 A CN 101549233A
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- acid
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D47/00—Separating dispersed particles from gases, air or vapours by liquid as separating agent
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/34—Chemical or biological purification of waste gases
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Environmental & Geological Engineering (AREA)
- Analytical Chemistry (AREA)
- Health & Medical Sciences (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Biomedical Technology (AREA)
- Solid-Sorbent Or Filter-Aiding Compositions (AREA)
- Filtering Materials (AREA)
- Filtering Of Dispersed Particles In Gases (AREA)
- Chemical Or Physical Treatment Of Fibers (AREA)
- Treatments For Attaching Organic Compounds To Fibrous Goods (AREA)
Abstract
A gas contaminant is filtered using fibers (2) having internal cavities (10) containing a chemically reactive oxidizing agent (12), an acid or base, a coordinating agent, a complexing agent, or a deliquescing agent. Where the contaminant is basic, the reagent (12) is preferably an oxidizing agent. Where the contaminant is acidic, the reagent (12) is preferably basic, and more preferably comprises a group 1 or group 2 metal cation. The reagent (12) may also advantageously comprise a phosphate, chitosan, hypochlorite, borate, carbonate, hydroxide, or oxide. Where the contaminant is neutral, the reagent (12) is preferably an oxidizing agent, complexing agent, coordinating agent, or deliquescing agent. The reagent (12) is preferably impregnated into an adsorptive solid, including, for example, carbon powder, zeolite, aluminum oxide, or silica. The fibers (2) are preferably multilobal, and most preferably either trilobal or quadrilobal. It is also preferred that the fibers (2) contain a plurality of T shaped lobes (6).
Description
The application is dividing an application of the PCT/US01/11902 (it enters the application number of China national after the stage is 01817482.5) that submits to April 11 calendar year 2001, and enjoys in the priority of the PCT/US00/28680 of application on October 17th, 2000.
Technical field
The present invention relates to filtration system, and relate to the system of utilizing solid and liquid reactants particularly.
Background technology
Conventionally known be to use active carbon and other materials will be removed in the foreign substances from air stream as absorptive element.Because effectively the appearance of fiber cross section might be made the fiber with part hollow.Especially effectively cross section is a kind ofly to have from the cross section at the outstanding position of three T shapes that centronucleus stretches out, as at U.S.Patent 5057, described in 368 " Filaments Having Trilobal Or Quadrilobal Cross-Sections " toLargman etc., be introduced into as a reference at this.In multiple application, traditional filter uses the filter medium that scribbles solid or fluent material; Yet many application-dependent are in absorption, rather than absorption.Absorption is to take place in particulate to be transferred surperficial part attached to the filtering material element; Yet absorption is that the mobility that occurs in molecular motion is used for moving unnecessary particulate part in non-mechanical mode from a zone to another zone.When some liquid or solid of removing pollutant was filled in capillary (wicking) fiber formed hole, the fiber of multiple-blade (multilobal) had special-effect as capillary fiber.
Filter and remove in the application of smell at absorbed air, use multiple-blade fiber with the solid filtering grain packing.This filter particulates comprises the use carbon granule, zeolite, sodium acid carbonate, cyclodextrin and the solid (see U.S.Patent 5,759,394, be introduced into as a reference at this) that can adsorb some pollutant.Other utilize the application of multiple-blade fiber type as capillary fiber, also comprise the absorbent properties that is filled in some liquid in the fiber hole.Select these liquid from contaminated air stream, to absorb smell and gas molecule slightly typically, (see U.S.Patents5,891 to help the final dispersion of these molecules to enter another air stream in reversible mode, 221 and 5,704,966, be introduced into as a reference at this).
In integrated circuit production process, keep environment and avoid polluting and be very crucial, because wafer very easily is subjected to the influence of the chemicals of little particulate and some low concentration.This can accomplish by making wafer in the inside, room of the cleaning with filtered air.Filter is used for making particulate and chemicals concentration to reduce to extremely low content (less than 1ppb).Semiconductor tools is also assembled in control for environment sometimes, and it can provide the air-flow of the super cleaning of part when handling.Yet traditional chemicals filter has extremely short service life, needs frequent replacing, and to remove effectively aspect some chemicals at needs be invalid.
Priority application was instructed and is used the fiber with longitudinally extending inner cavity contain with the reagent of alkaline gas chemically reactive to filter alkaline gas.Preferred reagent comprises acid, compounding ingredient, and complexing agent, and moisture absorption (deliquescing) reagent, and these reagent can be impregnated in the solid of adsorptivity easily.At that time, also do not recognize and can filter alkaline gas yet, perhaps can filter acidity or neutral gas with similar mode with oxidant.Therefore, it still needs to provide the apparatus and method that are suitable for filtering various gas with various.
Summary of the invention
The invention provides some apparatus and method, wherein, use the fiber filter gas pollutant with inner cavity, this fiber contains the chemical reaction oxidant, hydrogen ion acceptor or provide body, compounding ingredient, complexing agent, or moisture absorption reagent.
Gas pollutant can be acid, alkalescence, or pH neutrality.If pollutant is alkaline, reagent can be any acid, but oxidant preferably.If pollutant is acid, preferred reagent is alkaline, and preferred I family or the II family metal cation of comprising, is preferred anionic surfactants below: phosphate, shitosan, hypochlorite, borate, carbonate, hydroxide, or oxide.When pollutant was neutrality, preferred reagent was a kind of complexing agent, compounding ingredient, oxidant, perhaps moisture absorption reagent.
Reagent comprises a kind of metal cation in preferred embodiments, especially I family or II family metal cation.Reagent also may further include phosphate, shitosan, hypochlorite, borate, carbonate, hydroxide, or oxide.
Reagent preferably is impregnated in a kind of solid of absorption, comprises for example powdered carbon, zeolite, aluminium oxide or silica.
Preferred fiber is mutliblade, most preferably three blades or four-bladed.The fiber that contains many T shape blades also is preferred.
From the detailed description of the following preferred embodiment of the invention, together with accompanying drawing, can clear and definite more various purpose of the present invention, characteristics, each side and advantage, the various compositions of digitized representation in the accompanying drawings.
Description of drawings
Fig. 1 represents the cross-sectional view strength of an independent multiple-blade fiber.
Fig. 2 is illustrated in and deposits reagent in each leafy fiber, the close up view of the fiber mat of being made by the multiple-blade fiber.
The wide view of fiber mat in Fig. 3 presentation graphs 2.
Fig. 4 represents in one embodiment, uses the chamber through the multiple-blade fabric filter filtered air stream of acid dip.
Chamber in Fig. 5 presentation graphs 4 with multilayer multiple-blade fabric filter.
In different figure, use identical reference symbol to show similar or identical project.
The invention specific embodiment
Fig. 1 represents the detailed view of independent Multiblade fiber 2 cross sections.Fiber 2 is a kind ofly to be made by thermoplastic polymer, and with the fiber of conventional fibre forming technique moulding, for example in the above with reference to U.S.Patent5, described in 057,368, fiber composition is by the conventional formed spinning fiber of spinning head.Fiber 2 comprises a core 4, stretches out three blades 6 from wicking surface.With each blade 6 of top cover 8 end-blockings, terminal vertical linking to each other of top cover 8 and blade 6 wherein.The hole that forms between blade 6 and adjacent top cover 8 forms vertical slit 10 along the whole length of Multiblade fiber 2.Multiblade fiber 2 has for example ability of Powdered charcoal of the powdery granule of reservation material.Powdered carbon can be captured and mechanically remain in the slit 10 by top cover 8, does not need to use any liquid substance.The powder of capturing in slit 10 can be spread into fiber, remove unnecessary powder or blow away unnecessary powder by vibration then with fan.
Preferably, by capillary force, fiber 2 can keep liquid in slit 10.What Fig. 2 represented is the close-up shot of fiber mat 100, and wherein liquid reagent 12 is filled in the slit 10 of porous fibre 2.By with drop permeable fiber pad 100, and be siphoned into mode in the slit 10 after having an effect with fiber 2 surfaces, liquid reagent 12 can be used to fill slit 10.After drop was clamp-oned fiber 2, they are very fast coalescently went in the slit 10 and stay the porous space between fiber 2.Make air-flow in the clear by fiber mat 100.Select as another kind, also can will by capillary force reagent 12 be wicked in the slit 10 in the fiber 2 immersion reagent 12, and remove unnecessary reagent 12.
Can adopt diverse ways to make reagent 12 form drop, for example give reagent 12 pressurizations, perhaps, preferably adopt conventional liquid dropper by mechanical atomizer.The scope of reagent 12 can be different liquid, for example acid, alkali, oxidant, reducing agent, complexing agent, compounding ingredient, and moisture absorption reagent.
Acid as reagent 12 for example comprises inorganic acid, for example boric acid, preferably phosphoric acid or sulfuric acid.Also can use organic acid rather than inorganic acid.Organic acid for example comprises, monobasic, binary and tricarboxylic acid; The organic acid of these types comprises citric acid, lactic acid, maleic acid, fumaric acid, caproic acid, laurate, oxalic acid, malonic acid, tartaric acid, butanedioic acid, salicylic acid (salicyclic), and malic acid.In another embodiment, also can replace liquid acid, and, be immersed in the slit 10 to be similar to the method for above-mentioned carbon dust with solid acid.In another embodiment, powdery alkali also is used to filter non-alkaline pollutant.Such powdery alkali may comprise, such as sodium acid carbonate, and sodium carbonate, NaOH, sodium phosphate, potash, potassium hydroxide, and sodium tetraborate.In addition, reagent 12 can comprise compounding ingredient, and it comprises transition metal, copper for example, and tin, iron, zinc and titanium, and complexing agent, it comprises captures agent, for example cyclodextrin.
Comprise as the alkali of reagent 12, for example, I family or II family metal cation, and may advantageously comprise phosphate more, shitosan, hypochlorite, borate, carbonate, hydroxide, or oxide.Especially being worth the alkali of expection is NaOH and potassium hydroxide, the phosphate of potassium and sodium, the oxide of calcium or magnesium or hydroxide, the carbonate of sodium or potassium.
The oxidant of worth expection comprises the permanganate of I family or II family metal herein, hydrogen peroxide, and other inorganic and organic peroxides, and the hypochlorite of I family or II family metal, metal oxide comprises zinc, tin, iron, titanium or the like.
Yu Qi complexing agent comprises urea herein, cyclodextrin, crown ether or the like.
Yu Qi compounding ingredient comprises acetate of zinc and tin or the like herein.
Yu Qi moisture absorption reagent comprises the halide (comprising bromide and chloride) of lithium and potassium, fructose, propylene and ethylene glycol etc. herein.
Fig. 3 represents the wide view of fiber mat 100.Fiber 2 can be by the pleating or fiber mat 100 of moulding to form various different structures in layer.Usually, the volume in the slit 10 can reach half of leafy fiber 2 volumes, and according to the density of pollutant, and fiber 2 can hold the liquid pollutant of about 100 weight % and the 25 weight % any pressed powder to 125 weight % in slit 10.Utilize leafy fiber 2 to capture the character of liquid or solid pollutant, reagent 12 is used to the filtration application of adsorbing and absorbing.Reagent 12 is flooded slit 10 consciously, and it can be reactive liquid or solid reagent, preferred both is acid, and fiber mat 100 is used as supporting network so that maintenance reagent 12 is in the structure of high degree of dispersion, to remove absorption and absorbefacient molecular contaminants.Leafy fiber 2 not only can liquid hold-up or solid (acid) reagent 12, and also effective in the Composition Aspects of liquid hold-up reagent and solid particle.Solid absorbent, zeolite for example, aluminium oxide, active carbon (dipping with reset condition) and can combine with the liquid or solid form with sour reagent 12 with chemically modified silica is immersed in the slit 10 of leafy fiber 2.Solid absorbent also can combine and be immersed in the slit 10 with alkaline reagent 12.
100 pairs of the fiber mats pollutant of filter acid or alkali from fluid is effective especially.The acid contaminant of expection is any chemicals or the compound that is considered to acid in chemical field usually, comprises hydrogen ion donor and electron acceptor (lewis acid).The alkaline pollutant of expection is any chemicals or the compound that is considered to alkali in chemical field usually, comprises hydrogen ion acceptor and electronq donor (lewis base).The acid contaminant of special expection is inorganic acid and organically acid, especially comprises hydrochloric acid, the oxyacid of sulphur (Sulfur oxideacids), organic acid.The alkaline pollutant of special expection is ammonia and amine.
Adopt technology of the present invention also can filter PH herein and be neutral pollutant.The pollutant of the pH neutrality of special expection is arsenic and derivative thereof, alcohol, hydrocarbon, and oxygenated hydrocarbon.Special expection to be used for these neutral pollutant reaction reagent are compounding ingredients, oxidant, and complexing agent.
With the fiber mat 100 of liquid basified reagent 12 dippings, at the special acid contaminant that absorbs from fluid, for example inorganic acid or organic acid especially comprise the acid of nitrogenous or sulphur, sulfur oxide, and nitrogen oxide, hydrogen sulfide, effective especially.In an exemplary illustration, cross fiber mat 100 by the circulation of air of sulfate pollution.When pollutant by with alkaline reagent 12, during as the leafy fiber 2 of NaOH dipping, bronsted lowry acids and bases bronsted lowry generation chemical reaction and form water and non-volatile sodium sulfate salt.Afterwards, fiber 2 reserve parts or whole salt.
Use the fiber mat 100 of alkaline reagent 12 in leafy fiber 2, can be used for various application, for example, pleating or layering is to form fiber mat 100 with leafy fiber 2.In one embodiment, fiber mat 100 can be used for the filter element of filter chamber 102 as shown in Figure 4.Filter chamber 102 is made up of cavity 18, and it can design with common metal (for example aluminium), handles and on-the-spot the installation to adapt to.The fiber mat 100 of pleating or layering is attached on the cavity 18, preferably utilizes binding agent or low degassing glue.In another embodiment, also can be with fiber mat 100 attached on the framework (framework does not draw); The framework that this is had fiber mat 100 then in cavity 18 is installed or is removed alternately and carry out.Cavity 18 enters the mouth 14 and outlet 16 in addition,, filtered by fiber mat 100, and air-flow can pass through during through filter chamber 102 with convenient air-flow 20.Filter chamber 102 can be used to provide particle and/or chemicals filters.
Fig. 5 represents another embodiment of fiber mat 100.Fig. 6 is similar in many aspects to the filter chamber 102 among Fig. 4, just replaces fiber mat 100 with multi-layer fiber pad 100 '.The filter that multi-layer fiber pad 100 ' is made up of some adjacent separately layers.Each independent layer is with any reagent-impregnated discussed above; And make several independent layers of the different reagent of every layer of usefulness, be combined into single multi-layer fiber pad.The scope of the number of plies is from 1 to N, and according to required function, fiber mat 100 ' can comprise any layer and combination of agents.
Therefore, the specific embodiments and applications of the apparatus and method that are used for chemical reactive filtration are disclosed.Yet, significantly, do not deviating under the notion of the present invention, present technique field those of ordinary skill can do except the more improvement describing.Therefore, need only the spirit without prejudice to appended claims, theme of the present invention is also unrestricted.
Claims (29)
1. pneumatic filter comprises:
Many extension fibers, every fiber is defined as the inner cavity of many longitudinal extensions; With
Be deposited on the reaction reagent in the fibrous inside hole, and this reagent is selected from the group that is made of acid, alkali, compounding ingredient, complexing agent and moisture absorption reagent.
2. the filter of claim 1, wherein reagent comprises acid.
3. the filter of claim 1, wherein reagent comprises alkali.
4. the filter of claim 1, wherein reaction reagent is impregnated in a kind of solid of adsorptivity.
5. the filter of claim 1, wherein the solid of adsorptivity is selected from the group that is made of carbon dust, zeolite, aluminium oxide and silica.
6. the filter of claim 1, wherein each root of many fibers is three blade shaped.
7. the filter of claim 1, wherein each root of many fibers is a quaterfoil shape.
8. the filter of claim 1, wherein each root of many fibers comprises the blade of many T shapes.
9. use the method for filter filtering gaseous contaminant from gas of claim 1, comprising:
Select reaction reagent with the pollutant chemistry reaction;
Described reaction reagent is impregnated into the solid of adsorptivity; With
The deposition of solid of described adsorptivity is gone in described many inner cavities.
10. the method for claim 9, wherein pollutant is acid.
11. the method for claim 9, wherein pollutant is alkaline.
12. the method for claim 9, the solid of wherein said adsorptivity is selected from the group that is made of carbon dust, zeolite, aluminium oxide and silica.
13. a fiber mat, it comprises:
The fiber of many elongations, every fiber comprises inner cavity;
Many powdery granule materials; With
Be arranged in the chemical reaction reagent of the inner cavity of described fiber, wherein said reagent comprises at least a acid, at least a moisture absorption reagent or itself and at least a acid, at least a alkali, at least a compounding ingredient of at least a transition metal, at least a moisture absorption reagent of comprising, and wherein said at least a moisture absorption reagent comprises halide, fructose, propylene or the ethylene glycol of lithium, potassium.
14. the pad of claim 13, wherein said at least a acid comprises liquid acid.
15. the pad of claim 13, wherein said at least a acid comprises powder acid.
16. the pad of claim 13, wherein said at least a alkali comprises pulverous alkali.
17. the pad of claim 16, wherein said pulverous alkali comprises sodium acid carbonate, sodium carbonate, NaOH, sodium phosphate, potash, potassium hydroxide or sodium tetraborate.
18. the pad of claim 13, wherein said at least a transition metal comprises copper.
19. the pad of claim 18, wherein said many fibers comprise at least a thermoplastic polymer.
20. the pad of claim 13, wherein said powdery granule material comprises carbon dust.
21. the pad of claim 13, wherein said powdery granule material comprises zeolite, aluminium oxide or silica.
22. the pad of claim 13, at least some of wherein said many fibers are three blade shaped.
23. the pad of claim 13, at least some of wherein said many fibers are quaterfoil shapes.
24. the pad of claim 13, at least some of wherein said many fibers comprise the blade of many T shapes.
25. the pad of claim 13, wherein said pad is pleating.
26. the pad of claim 13 also comprises the framework that is connected to described pad.
27. comprise the pneumatic filter of the pad of claim 13.
28. comprise the filter chamber of the pad of claim 13.
29. comprise the shell of the pad of claim 13.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| PCT/US2000/028680 WO2001028657A1 (en) | 1999-10-20 | 2000-10-17 | Complex shaped fiber for particle and molecular filtration |
| USPCT/US00/28680 | 2000-10-17 |
Related Parent Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNA018174825A Division CN1469770A (en) | 2000-10-17 | 2001-04-11 | Devices and methods for chemical reactive filtration |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101549233A true CN101549233A (en) | 2009-10-07 |
Family
ID=21741900
Family Applications (2)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNA2008101253717A Pending CN101549233A (en) | 2000-10-17 | 2001-04-11 | Devices and methods for chemical reactive filtration |
| CNA018174825A Pending CN1469770A (en) | 2000-10-17 | 2001-04-11 | Devices and methods for chemical reactive filtration |
Family Applications After (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNA018174825A Pending CN1469770A (en) | 2000-10-17 | 2001-04-11 | Devices and methods for chemical reactive filtration |
Country Status (5)
| Country | Link |
|---|---|
| JP (1) | JP2004511337A (en) |
| KR (1) | KR20030046513A (en) |
| CN (2) | CN101549233A (en) |
| AU (1) | AU2001257017A1 (en) |
| WO (1) | WO2002032548A1 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103801780A (en) * | 2012-11-06 | 2014-05-21 | 尔萨有限公司 | Method and cleaning system for cleaning the process gas in soldering installations |
| CN109395531A (en) * | 2012-05-07 | 2019-03-01 | 唐纳森公司 | Material, method and apparatus for the removal of silicone contamination object |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8016125B2 (en) | 2005-05-20 | 2011-09-13 | Lutek, Llc | Materials, filters, and systems for immobilizing combustion by-products and controlling lubricant viscosity |
| CN109107392A (en) * | 2007-05-29 | 2019-01-01 | 懿华水处理技术有限责任公司 | Use the Membrane cleaning of pulsed airlift pump |
| US20090194484A1 (en) | 2008-02-01 | 2009-08-06 | Lutek, Llc | Oil Filters Containing Strong Base and Methods of Their Use |
| KR101321493B1 (en) | 2011-08-16 | 2013-10-28 | 한국화학연구원 | Air filter which having superior effective to filtration of super fine particle and sterilization |
| KR101719227B1 (en) * | 2016-09-21 | 2017-03-24 | (주) 클푸 | Fiber for anti-allergen and method of making same |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5891221A (en) * | 1994-12-23 | 1999-04-06 | Alliedsignal Inc. | Chemical reagent package and method of operation effective at removing a wide range of odors |
| WO1996020097A1 (en) * | 1994-12-23 | 1996-07-04 | Alliedsignal Inc. | A filtration device using absorption for the removal of gas phase contaminants |
| US5759394A (en) * | 1996-11-27 | 1998-06-02 | Alliedsignal Inc. | Elongate fiber filter mechanically securing solid adsorbent particles between adjacent multilobes |
-
2001
- 2001-04-11 AU AU2001257017A patent/AU2001257017A1/en not_active Abandoned
- 2001-04-11 CN CNA2008101253717A patent/CN101549233A/en active Pending
- 2001-04-11 CN CNA018174825A patent/CN1469770A/en active Pending
- 2001-04-11 WO PCT/US2001/011902 patent/WO2002032548A1/en active Application Filing
- 2001-04-11 KR KR10-2003-7005374A patent/KR20030046513A/en not_active Application Discontinuation
- 2001-04-11 JP JP2002535782A patent/JP2004511337A/en not_active Withdrawn
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109395531A (en) * | 2012-05-07 | 2019-03-01 | 唐纳森公司 | Material, method and apparatus for the removal of silicone contamination object |
| CN103801780A (en) * | 2012-11-06 | 2014-05-21 | 尔萨有限公司 | Method and cleaning system for cleaning the process gas in soldering installations |
| CN103801780B (en) * | 2012-11-06 | 2016-01-20 | 尔萨有限公司 | For method and the cleaning systems of the process gas in clean brazing device |
Also Published As
| Publication number | Publication date |
|---|---|
| AU2001257017A1 (en) | 2002-04-29 |
| WO2002032548A1 (en) | 2002-04-25 |
| CN1469770A (en) | 2004-01-21 |
| KR20030046513A (en) | 2003-06-12 |
| JP2004511337A (en) | 2004-04-15 |
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Open date: 20091007 |