EP1289631A1 - Boitiers filtrants a contre-courant se presentant sous forme de modules a fentes larges ameliores - Google Patents

Boitiers filtrants a contre-courant se presentant sous forme de modules a fentes larges ameliores

Info

Publication number
EP1289631A1
EP1289631A1 EP01931623A EP01931623A EP1289631A1 EP 1289631 A1 EP1289631 A1 EP 1289631A1 EP 01931623 A EP01931623 A EP 01931623A EP 01931623 A EP01931623 A EP 01931623A EP 1289631 A1 EP1289631 A1 EP 1289631A1
Authority
EP
European Patent Office
Prior art keywords
retentate
filter cassettes
filtrate
longitudinal
thickness
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP01931623A
Other languages
German (de)
English (en)
Inventor
Hans-Weddo Schmidt
Ulrich Grummert
Ina Pahl
Claudia Hartmann
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Sartorius AG
Original Assignee
Sartorius AG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Sartorius AG filed Critical Sartorius AG
Publication of EP1289631A1 publication Critical patent/EP1289631A1/fr
Withdrawn legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D63/00—Apparatus in general for separation processes using semi-permeable membranes
    • B01D63/08—Flat membrane modules
    • B01D63/081—Manufacturing thereof
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D63/00—Apparatus in general for separation processes using semi-permeable membranes
    • B01D63/08—Flat membrane modules
    • B01D63/082—Flat membrane modules comprising a stack of flat membranes
    • B01D63/084—Flat membrane modules comprising a stack of flat membranes at least one flow duct intersecting the membranes

Definitions

  • Crossflow filter cartridges in the form of improved wide-gap modules are provided.
  • the invention relates to crossflow filter cassettes in the form of improved wide-gap modules which are arranged between clamping plates and operated in crossflow filtration systems.
  • fluids such as particle-laden liquids, in particular protein-containing, fat-containing and cell-containing media, such as those which occur above all in pharmaceutical and biotechnological processes, can be used on a laboratory, semi-technical and industrial scale according to the crossflow principle for the recovery of valuable substances, concentration of substances , Removal of unwanted components and sterilization are filtered.
  • the crossflow filtration is carried out with filter cassettes in appropriate crossflow filtration systems in which at least one filter cassette, but usually several filter cassettes, are arranged in a row as a stack.
  • Such crossflow filter cartridges are described for example in the patents DE-PS 34 41 249 and US-PS 47 15 955.
  • the filter cassettes are constructed from a Niekahl of adjacent filter cells, which consist of stacked, flat blanks of at least one retentate spacer element as a component for forming an overflow gap for fluid to be filtered, a first membrane, a filtrate spacer for forming a filtrate collecting gap and a second membrane. In the peripheral edge area, the blanks are connected from a sealing compound to the filter cassette.
  • the blanks have aligned openings in their edge regions for the formation of channels, which preferably run perpendicular to the surface of the blanks Fluid feed, retentate drain and filtrate drain.
  • Those openings of the spacers, which are to be kept closed towards the channels, are enclosed in their peripheral edge regions in a fluid-tight manner by a sealing compound which projects slightly beyond the level of the spacers.
  • the remaining openings in the spacers, which communicate with the channels, are not enclosed by any sealing compound, but are open.
  • crossflow filtration the fluid to be filtered is pressed through an inflow plate and corresponding channels into overflow gaps of the filter cassettes for the fluid to be filtered. It flows over the membrane surface and is discharged as retentate. Part of the fluid permeates through the membrane and is collected in the filtrate collecting gap and discharged from the system as filtrate via corresponding channels and an outflow plate.
  • DE-PS 3441 249 suggests installing protective frames between the blanks.
  • the height of the overflow gaps for the fluid to be filtered is increased within certain limits. It is also known to use thicker fabrics to increase the height of the overflow gaps. With these so-called wide-gap modules, premature blocking of the filter cassettes is to be avoided in crossflow filtration.
  • the invention is therefore based on the object of providing crossflow filter cassettes which are suitable for crossflow filtration of particle-laden protein-containing, fat-containing and cell-containing media, such as occur in particular in pharmaceutical and biotechnological processes, and which are characterized by a long service life and high retentate and filtrate flows.
  • the crossflow filter cassettes according to the invention constructed from microporous membranes have an overflow gap which is formed from a retentate spacer element and from two retentate spacer frames which cover the retentate spacer element on both sides in its flat edge regions.
  • the retentate spacer frames have a thickness that is in the range from greater than 50 to 200 ⁇ m, preferably 80 ⁇ m.
  • the retentate spacer frames are preferably made of plastic, for example PVDF, and they preferably have contours that are congruent with the edge region of the retentate spacer element, that is to say that corresponding openings for the formation of the channels for the fluid supply, for the retentate drain and for the filtrate drain are aligned are pronounced.
  • the thickness of the retentate spacer frame on the one hand, means that a gap remains between the retentate spacer element and the adjacent membrane over the entire membrane surface, through which relatively coarse particles can be rinsed out for their regeneration both during overflow and during backwashing of the filter cartridges.
  • the membrane is obviously caused to vibrate by this gap and by the turbulence of the fluid to be filtered caused by the flow through the retentate spacer element according to the invention, which makes it more difficult for substances to deposit on the surface of the membrane and blocks the membrane less (membrane fouling).
  • the whole Membrane surface is effective because the retentate spacer element does not rest on the membrane surface.
  • the means mentioned obviously lead to an increase in service life and filtration performance.
  • the membrane has no possibility of oscillation in the case of an overflow gap which is only formed by a retentate spacer element, for example a woven or non-woven fabric.
  • the retentate spacer element used according to the invention consists of an open-mesh matrix of intersecting longitudinal and transverse threads.
  • the adjacent longitudinal and transverse threads each have a distance of 5 to 15 times their thickness.
  • the thread thickness should be in the range of 150 to 600 ⁇ m.
  • the retentive spacer element obviously achieves an optimal turbulent overflow of the fluid to be filtered in the overflow gap.
  • the fabrics commonly used in cross-flow filter cartridges of the wide-gap module type as retentate spacers for example with a thread thickness of approximately 300 ⁇ m and a thread spacing that corresponds approximately to their thread thickness, already block the filter cartridge after a short filtration time.
  • the longitudinal and transverse threads consist of organic polymer fibers, which were produced by an extrusion process and where the threads are still fused in the form of an extruded lattice work at their crossing points. It has proven particularly advantageous for the blocking of the overflow gap to be suppressed if the threads of the matrix are stretched during the extrusion.
  • the diameter should decrease by at least 5%.
  • a such a matrix also has a reduced flow resistance to the medium to be filtered. If a matrix is used, for example in the form of a fabric, in which the threads are not connected at their crossing points, deposits form in the area of these crossing points, such as proteinaceous coagulates, which block the overflow gap.
  • the open-mesh matrix should preferably be constructed symmetrically, the threads being at an angle of 90 ° to one another.
  • An optimal filtration performance of the crossflow filter cassettes is achieved if the longitudinal and transverse threads of the matrix are at an angle of preferably 45 ° to the flow direction of the fluid to be filtered.
  • the longitudinal threads of the matrix lie in a first plane and the transverse threads of the matrix lie in a second plane, which is parallel to the first plane.
  • the possibility of membrane vibration is further supported by the fact that a filtrate spacer frame is also introduced on the filtrate side of the membrane.
  • the filtrate spacer consists of a filtrate spacer element with the filtrate spacer frame covering it on both sides in its flat edge regions.
  • the filtrate spacer frames have a smaller thickness than the retentate spacer frames. It is up to 50 ⁇ m, with 50 ⁇ m being preferred.
  • Fig. 1 schematically shows an exploded section through a section of a crossflow filter cartridge according to the invention
  • FIG. 2 shows a plan view of a retentate spacer along the line AA 'of FIG. 1.
  • the crossflow filter cassettes 1 consist of a large number of adjacent filter cells 2, which are constructed from flat blanks arranged in a stack.
  • the flat blanks are a retentate spacer element 3, which is covered on both sides in its flat edge region with retentate spacer frames 3 'and 3 "and which together form an overflow gap 4 for fluid to be filtered, a first membrane 5, a filtrate spacer 6 for forming a filtrate collecting gap 7 and one second membrane 8.
  • the flat blanks 3, 5, 6 and 8 have, according to FIGS.
  • the retentate spacer element 3 consists of an open-mesh matrix 16, which consists of crossing longitudinal 17 and transverse threads 18th The threads 17, 18 are connected to one another at their crossing points 19. The adjacent longitudinal and transverse threads each have a distance 20, 21 from one another which corresponds to 5 to 15 times their thickness.
  • the retentate spacer frames have a thickness 22 in the range from 75 to 200 ⁇ m (FIG. 1).
  • EXAMPLE 1 The filtration was carried out with a cross-flow filter cassette as wide-gap module of the prior art Sartocon Slice ® (Sartorius AG). It had: 16 overflow gaps for filtrate, 17 overflow gaps for fluid to be filtered, retentate spacer frame with a thickness of 50 ⁇ m and a fabric with a thickness of 610 ⁇ m as a retentate spacer element with threads with a thickness of approximately 300 ⁇ m, the distance between the threads being approximately 300 ⁇ m. The longitudinal and transverse threads of the matrix were at an angle of 60 ° and 30 ° to the flow direction of the fluid to be filtered.
  • the crossflow filter cassette had:
  • overflow gaps for filtrate 14 overflow gaps for fluid to be filtered, retentate spacer frame with a thickness of 125 ⁇ m and an open-mesh matrix in the form of a woven fabric with a thickness of 450 ⁇ m as a retentate spacer element with threads with a thickness of approximately 210 ⁇ m, the distance between the threads being approximately 250 ⁇ m was.
  • the longitudinal and transverse threads of the matrix were at an angle of 60 ° and 30 ° to the flow direction of the fluid to be filtered.
  • the crossflow filtration showed a sudden decrease in the retentate flow during the second filtration cycle, the filtrate flow decreased to about 70% of the initial value, while after 8 filtration cycles the overflow gaps did not become blocked.
  • the crossflow filter cassette had: 10 overflow gaps for filtrate, 11 overflow gaps for fluid to be filtered, retentate spacer frame with a thickness of 80 ⁇ m and an open-mesh matrix in the form of a lattice work with a thickness of 1030 ⁇ m as retentate spacer element with threads with a thickness of approximately 500 and 650 ⁇ m, the distance between the threads was about 1500 microns.
  • the threads were connected at the crossing points.
  • the longitudinal and transverse threads of the matrix were at an angle of 45 ° to the direction of flow of the fluid to be filtered.
  • Example 4 The crossflow filter cassette had:
  • a crossflow filter cassette was used, which had the same structure as the crossflow filter cassette described in Example 4, with the difference that the effective membrane area was not 0.1 m 2 , but 6 times (0.6 m 2 ).

Landscapes

  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Separation Using Semi-Permeable Membranes (AREA)

Abstract

L'invention concerne des boîtiers filtrants à contre-courant (1) qui sont placés entre des plaques de montage dans des installations de filtration à contre-courant et sont appropriés à la filtration de substances contenant des protéines, de la graisse et des cellules, et chargées de particules. Ils ont des vies utiles et des flux de produit de rétention et de filtrat importants. Selon l'invention, les fentes de décharge (4) sont constituées d'un élément espaceur produit de rétention (3) et deux cadres espaceurs produit de rétention (3', 3'') qui recouvrent l'élément espaceur produit de rétention (3) des deux côtés dans la zone de bordure. L'élément espaceur produit de rétention (3) est constitué d'une matrice à mailles ouvertes (16) réalisée à partir de fils longitudinaux (17) et de fils transversaux (18) croisés. Les fils longitudinaux (17) et les fils transversaux (18) adjacents sont respectivement séparés les uns des autres par une distance (20, 21) correspondant à 5 à 15 fois (20, 21) leur épaisseur et atteignant 150 à 600 νm. Les cadres espaceurs produit de rétention (3', 3'') ont une épaisseur (22) supérieure à 50 à 200 νm. Les boîtiers filtrants à contre- courant selon l'invention permettent de filtrer surtout des fluides dans le domaine pharmacologique et biotechnologique aux fins d'obtention de produits de valeur, de concentration de substances, de séparation de particules indésirables et de stérilisation.
EP01931623A 2000-05-08 2001-04-19 Boitiers filtrants a contre-courant se presentant sous forme de modules a fentes larges ameliores Withdrawn EP1289631A1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE10022259A DE10022259A1 (de) 2000-05-08 2000-05-08 Crossflow-Filterkassetten in Form von verbesserten Weitspaltmodulen
DE10022259 2000-05-08
PCT/EP2001/004435 WO2001085316A1 (fr) 2000-05-08 2001-04-19 Boitiers filtrants a contre-courant se presentant sous forme de modules a fentes larges ameliores

Publications (1)

Publication Number Publication Date
EP1289631A1 true EP1289631A1 (fr) 2003-03-12

Family

ID=7641111

Family Applications (1)

Application Number Title Priority Date Filing Date
EP01931623A Withdrawn EP1289631A1 (fr) 2000-05-08 2001-04-19 Boitiers filtrants a contre-courant se presentant sous forme de modules a fentes larges ameliores

Country Status (5)

Country Link
US (1) US6916420B2 (fr)
EP (1) EP1289631A1 (fr)
AU (1) AU5835101A (fr)
DE (1) DE10022259A1 (fr)
WO (1) WO2001085316A1 (fr)

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DE10000186C2 (de) 2000-01-05 2003-09-04 Sartorius Gmbh Vorrichtung und Anlage zur Crossflow-Filtration
US20050269255A1 (en) * 2002-04-19 2005-12-08 Attila Herczeg Shaped flow distribution in filtration cassettes
DE102005008924A1 (de) * 2005-02-24 2006-08-31 Mann + Hummel Gmbh Filtereinheit, Filtervorrichtung und Filtrationsprozess für Fluide
US7384549B2 (en) 2005-12-29 2008-06-10 Spf Innovations, Llc Method and apparatus for the filtration of biological solutions
US20080257814A1 (en) * 2007-04-23 2008-10-23 Millipore Corporation Filtration Cartridge
KR20140047736A (ko) * 2011-12-09 2014-04-22 이엠디 밀리포어 코포레이션 고점성 tff 장치 디자인
WO2013109749A1 (fr) * 2012-01-17 2013-07-25 The Penn State Research Foundation Dispositif de filtre flexible destiné à capturer des particules ou des cellules dans un fluide
EP2934727B1 (fr) 2012-12-21 2024-05-01 Porifera, Inc. Systèmes de séparation utilisant des membranes et des dispositifs d'espacement empilés
WO2014144704A1 (fr) 2013-03-15 2014-09-18 Porifera, Inc. Progrès dans des systèmes membranaires à entraînement osmotique comprenant un réglage de pression faible
DE102014104984A1 (de) * 2014-04-08 2015-10-08 Sartorius Stedim Biotech Gmbh Filtrationsvorrichtung
DE102015108501A1 (de) 2015-05-29 2016-12-01 Sartorius Stedim Biotech Gmbh Verfahren und Filtrationsvorrichtung zur Herstellung einer konzentrierten Produktlösung
KR102531484B1 (ko) 2015-06-24 2023-05-10 포리페라 인코포레이티드 정삼투를 통한 알콜성 용액의 탈수 방법 및 관련 시스템
DE102016004114A1 (de) 2016-04-05 2017-10-05 Sartorius Stedim Biotech Gmbh Crossflow-Filtrationseinheit
DE102016004115A1 (de) 2016-04-05 2017-10-05 Sartorius Stedim Biotech Gmbh Crossflow-Filtrationseinheit zur kontinuierlichen Diafiltration
CN110290854A (zh) 2016-12-23 2019-09-27 波里费拉公司 通过正向渗透除去醇溶液的组分和相关系统
DE102018006286B3 (de) * 2018-08-08 2019-10-10 Sartorius Stedim Biotech Gmbh Bioreaktor mit Filtereinheit und Verfahren zur Behandlung einer Zellbrühe
JP2022508107A (ja) * 2018-11-30 2022-01-19 レプリゲン・コーポレーション 単回使用の無菌接線流濾過システム及び方法
CN115888398B (zh) * 2021-09-23 2025-11-11 中国石油化工股份有限公司 切向流膜片组和切向流膜组件及其制备方法和应用
CN115382292A (zh) * 2022-08-18 2022-11-25 杭州科百特过滤器材有限公司 一种过滤膜包

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Also Published As

Publication number Publication date
US6916420B2 (en) 2005-07-12
DE10022259A1 (de) 2001-11-15
WO2001085316A1 (fr) 2001-11-15
AU5835101A (en) 2001-11-20
US20030173285A1 (en) 2003-09-18

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