EP0930932A1 - Module de plaque tubulaire - Google Patents

Module de plaque tubulaire

Info

Publication number
EP0930932A1
EP0930932A1 EP97944901A EP97944901A EP0930932A1 EP 0930932 A1 EP0930932 A1 EP 0930932A1 EP 97944901 A EP97944901 A EP 97944901A EP 97944901 A EP97944901 A EP 97944901A EP 0930932 A1 EP0930932 A1 EP 0930932A1
Authority
EP
European Patent Office
Prior art keywords
hose
plates
module
fluid
hoses
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.)
Ceased
Application number
EP97944901A
Other languages
German (de)
English (en)
Inventor
Richard Witzko
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.)
WL Gore and Associates GmbH
Original Assignee
WL Gore and Associates GmbH
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 WL Gore and Associates GmbH filed Critical WL Gore and Associates GmbH
Publication of EP0930932A1 publication Critical patent/EP0930932A1/fr
Ceased 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
    • B01D63/02—Hollow fibre modules
    • B01D63/021—Manufacturing thereof
    • B01D63/0231—Manufacturing thereof using supporting structures, e.g. filaments for weaving mats
    • 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
    • B01D63/06—Tubular membrane modules
    • B01D63/061—Manufacturing thereof
    • 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
    • B01D53/14—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 by absorption
    • B01D53/18—Absorbing units; Liquid distributors therefor
    • 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
    • B01D53/22—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 by diffusion
    • 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
    • B01D53/22—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 by diffusion
    • B01D53/229—Integrated processes (Diffusion and at least one other process, e.g. adsorption, absorption)
    • 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
    • B01D63/02—Hollow fibre modules
    • 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
    • B01D63/02—Hollow fibre modules
    • B01D63/021—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
    • B01D63/02—Hollow fibre modules
    • B01D63/026—Wafer type modules or flat-surface type modules
    • 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
    • B01D63/02—Hollow fibre modules
    • B01D63/04—Hollow fibre modules comprising multiple hollow fibre assemblies
    • 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
    • B01D63/06—Tubular membrane modules
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2313/00—Details relating to membrane modules or apparatus
    • B01D2313/14—Specific spacers

Definitions

  • the invention relates to a hose plate module, in particular a hose plate module containing membrane hoses for treating
  • modules are used for a wide variety of purposes. In general, it is about the treatment of one fluid, possibly with the aid of a second fluid.
  • Each fluid can be either gaseous or liquid.
  • hose in the present context means a tubular body made of a membrane.
  • hose diameters in the range of ⁇ approx. 2 mm, such a body can also be used as
  • the tubular or hollow fiber plate module according to the invention thus belongs to the general technical field of membrane separation.
  • This technical field includes, for example, ultrafiltration and reverse osmosis (cf. "Membrane separation process; ultrafiltration and reverse osmosis” by R. Rautenbach and R. Albrecht, Otto Salle Verlag / Verlag Sauerators, Chapter 5, Module Construction and Module Characteristics, Seiteg. 109 to 121).
  • Such a hose module consists of a bundle of more or less exactly parallel membrane hoses, which are cast at both ends and are also equipped on the opposite side with a fluid inlet or a fluid outlet.
  • the tube bundle is located inside a cylindrical housing, which is in counterflow (with respect of the fluid flowing through the hoses) or is cross-flowed around by a second fluid.
  • a special area of application for membrane modules is in the field of gas cleaning, in particular exhaust gas cleaning.
  • Membrane contactors (GB-A-2 025 256 Shindo et al.), In which an absorber liquid is kept in motion on one side of a membrane, are proposed for removing, for example, CO 2 and H 2 S from natural gas and exhaust gases from power plants processing fossil fuels. and on the other side of this membrane, a gas mixture is passed, which contains one or more gas components to be removed from the mixture (CO 2 ; H 2 S).
  • the microporous membrane allows these polar gases to pass through, so that there is a chemical reaction between the absorber liquid and the gas component to be removed from the gas mixture.
  • a hollow fiber membrane arrangement which consists of bundles of hollow fiber membranes which are cast in at the end so that an absorber liquid can flow through them and which are also arranged in a housing so that they are on the outside be washed around by the gas to be cleaned.
  • the production of the known hollow fiber membrane modules, each with a bundle of hollow fiber membranes encased in a housing, is relatively difficult because the handling of the hollow fibers during production is cumbersome. This difficult handling of the individual hollow fibers also results in the flow resistance, which can only be set within certain limits, for the fluid flowing around the outside of the hollow fibers.
  • the flow resistance of the flow path past the outer surfaces of the hollow fiber can vary very greatly from module to module.
  • the flow resistance mentioned above can only be reduced to a very limited extent; because the hoses cannot be arranged in a module with relatively large distances between them without considerable effort.
  • WO 91/09668 shows an arrangement of hollow fiber or tubular membranes in modular form, with an array of rows and columns of tubes of the same length being held at the end by perforated plates in which the ends of the tubes are seated. At each of these end plates there is a cavity as an inlet or outlet for a fluid to be conducted through the hoses.
  • the tubes are at a considerable distance from one another and a second fluid flows around them on the outside in cross flow.
  • This module is said to be suitable for micro and ultrafiltration, reverse osmosis, dialysis and gas separation.
  • WO 91/09668 it is not detailed how the individual tubes in their
  • a module for loading aqueous suspensions of microorganisms and gaseous substances can be found in EP-B-0 554 255 (Biller), for which purpose the module has approximately rectangular module pockets which are suspended parallel to one another and are filled with the aqueous suspension. The gas is then passed through the spaces between these membrane pockets.
  • filling the membrane pockets in batches does not correspond to the usual tion for a device that allows a steady-state procedure, even if the membrane pockets should be filled in the installed state according to the EP '255 mentioned.
  • the invention has for its object to provide a hose plate module which enables continuous treatment of a fluid at high throughput, which is easy to produce, which has a stable structure, and in which in particular the flow resistance for the fluid can be set to comparatively low values .
  • a tube plate module with a module body made up of a plurality of membrane tube plates arranged parallel to one another, each having a plurality of tubes connected by means of webs, the tubes extending in the Z direction of a cartesian coordinate system and the Hose plates each extend approximately in a ZY plane between a first and a second potting material plate, in which first and second ends of the hoses of the hose plates are embedded, with an inlet for a first fluid on the outside of the first potting material plate and an inlet for a second fluid on a side of the module body pointing in the Y direction.
  • the tubular plate module according to the invention can make use of the above-described coherent tubular flat strips, which go back to the inventor of the present invention and are referred to here as tubular plates.
  • the modules according to the invention can be produced and handled very easily, they are distinguished by a particularly low flow resistance, which is particularly advantageous with large gas volumes, for example exhaust gases from conventional power plants, the fossil
  • the moduf according to the invention is designed for a cross flow, the first fluid flowing through the hoses and the second fluid flowing between the plates in a direction perpendicular thereto.
  • the invention provides that an outlet for the first on the outside of the second potting material plate
  • the module according to the invention has an inlet and an outlet both for the first fluid and for the second fluid, so that a cross flow with very low flow resistance for the second fluid is possible between the spaced tube plates.
  • the module according to the invention can be used for practically all purposes in the field of membrane separation, but in particular it serves to separate one or more gas components from a gas mixture with the aid of an absorber liquid by chemical reaction.
  • the first fluid is the absorber fluid, which is passed through the interior of the hoses, and the second fluid is that
  • This gas component permeates through the membrane towards the inside of the individual hose and chemically combines there with the absorber liquid.
  • the module according to the invention is used in particular for the operation in cross flow of the two fluids, in that the first fluid is passed through the interior of the tubes and the second fluid between the tube plates in a direction perpendicular thereto.
  • the ends of the hoses facing away from the inlet side of the hoses are closed, can the inside of these hoses are pressurized with gas under a certain pressure. This gas "present” inside the hoses can then permeate through the hose membrane in order to react with the fluid on the outside of the hose. If you have a large number of hose plates parallel to each other
  • the stability of the module can be increased further by equipping individual hoses with stabilizing bars ("wires"), for example "wires” made of metal, plastic or glass, which are inserted into individual hoses. The inside of these hoses is then no longer available for the through-flow of the fluid, but the module as a whole has an extremely stable arrangement, so that it can be handled and processed like a completely rigid structure.
  • stabilizing bars for example "wires” made of metal, plastic or glass
  • the membrane can consist of continuously microporous material, for example microporous PTFE. However, it can also consist, for example, of a microporous carrier material with a thin, so-called “dense layer", this "dense layer" being semi-permeable to polar gases.
  • the membrane consists of a microporous support and a 0.5 ... 5 ⁇ m thick, semi-permeable layer.
  • the tubular plates have a center distance of 0.1 ... 10 mm (preferably 0.5 ... 5 mm).
  • the maximum flow resistance required can be set in these areas.
  • the flow resistance for the second fluid is too high for the module to be suitable in practice.
  • the module no longer works efficiently, which means that the second fluid emerges from the module before a significant proportion of the fluid has come into contact with the surface of the membrane hose plates. It is taken into account here that the dimensions of a module in question range from approximately 10 x 10 x 10 cm to approximately 50 x 50 x 100 cm.
  • the tube plates can be arranged in such a way that the two adjacent tubes of adjacent tube plates are in X- Align in the direction, but the plates can also be moved in the Y direction in such a way that the hoses of one plate are approximately aligned with the center of the adjacent hose plate.
  • the invention also relates to the use of a tube plate module of the type mentioned above as a gas absorption module, for which purpose an absorption liquid is introduced into the tubes and the gas flows through the interstices of the tube plates in cross flow.
  • the invention also provides a method for producing a tubular plate module of the type mentioned above.
  • the method according to the invention contains the following steps:
  • Hose plates are formed, a distance being set between the hose plates and the hoses all running in one direction (e.g. Z direction);
  • the sides of the stack containing the hose ends are poured into a casting compound (for example a resin); and c) at least at one end of the stack, the potting compound hardened into a plate is cut in order to open the hose ends embedded therein.
  • a casting compound for example a resin
  • the distance between the adjacent hose plates is preferably set with the aid of spacer strips which are inserted into the stack, the thickness of the spacer strips corresponding to the distance minus the outer diameter of a hose.
  • the stacking and setting of the predetermined distances between adjacent tube plates is made considerably easier by introducing stabilizing rods into individual tubes.
  • Figure 1 is a schematic, perspective view of a hose plate module with indicated parts of the housing for the module.
  • FIG. 2 shows a schematic, perspective partial view of a module according to FIG. 1;
  • 3a shows a schematic plan view of a part of a tubular plate module according to the invention against the Z direction;
  • Fig. 3b is a view similar to Fig. 3a, but with the hoses of the hose plates aligned with one another, whereas they are offset from plate to plate by half a hose distance according to Fig. 3a;
  • 5a shows a perspective view of part of a hose arrangement in the form of a flat band from the prior art (DE-A-44 12 756); 5b shows an end view of the arrangement according to FIG. 5a; and
  • Fig. 6 is a schematic view of a tube plate provided with housing module according to the invention 's.
  • FIGS. 5a and 5b represents a known arrangement of hoses designed as a flat strip, as is known from the prior art (DE-A- 44 12 756).
  • membrane tube plate or simply as “tube plate” 100.
  • the tubular plate 100 is produced by pressing together two microporous PTFE flat lands with the interposition of shaped wires, so that this continuous production process results in a continuous tubular plate 100 in which tubes 102 are formed at the locations of the shaped wires, which are flat
  • the channels 106 in the tubes 102 have a defined inner diameter di according to FIG. 5b.
  • the outer diameter de of the individual hoses 102 is about the web thickness t. larger than the inner diameter di.
  • the neighboring ones have
  • Hoses 102 a center distance b. ⁇
  • the tubular plates 100 are formed by pressing two porous flat band membranes together.
  • the interior 106 of a hose 102 flows through a first fluid
  • polar gas molecules can permeate through the microporous material, so that the concentration of the permeated gas component in the one fluid is reduced.
  • first fluid for example a liquid
  • second fluid for example a gas mixture from which a component is to be separated
  • FIG. 5 a shows that with such a sequence the membrane surfaces in the area of the webs 104 make practically no contribution to the separation process, but only the membranes in the area of the tubes 102.
  • FIG. 1 shows on the right side a Cartesian coordinate system with the axes X, Y and Z perpendicular to one another. Reference will be made to this in the following.
  • a module body 2 is shown on the left in FIG. 1.
  • the module body contains an arrangement of, for example, five tubular plates 100, which run parallel to one another, of the type shown in FIG. 5a.
  • the individual tubular plates with the tubes 102 and the webs 104 connecting two adjacent tubes each extend in the YZ plane or in parallel to it Levels.
  • the hose plates are of equal length, their upper and lower ESu are held together by potting material plates 20 and 22, so that there is a rectangular structure.
  • On the outside of the upper potting material plate 20 there is an only indicated inlet space 4 for a first fluid, the fluid in the negative Z direction through the
  • Hoses 102 is pumped.
  • An outlet space 5 is indicated on the underside of the potting material plate 22, which is mainly formed by a lower housing wall 6, which is indicated by a dash-dotted line.
  • FIG. 2 shows a detail of the arrangement according to FIG. 1 in an enlarged representation, the flow directions for the first and the second fluid also being shown.
  • a first fluid is introduced via the inlet space 4 (shown in FIG. 1) on the upper side of the upper potting material plate 20, which is indicated by the arrows Li.
  • this fluid can be an absorber liquid for CO 2 .
  • This absorber liquid flows through the individual tubes 102 and exits at their opposite end, which is indicated by the arrow Lo.
  • a gas mixture for example an exhaust gas from a power plant
  • the module body 2 which is indicated with Gi on the inlet side and with Go on the outlet side.
  • the gas mixture runs through the interstices of the tubular plates, so that CO 2 molecules come into contact with the membrane of the tubular plates, partially penetrate this membrane and come into contact with the absorber liquid which flows in the tubes 102.
  • 3a and 3b show an end view of the hose plates in a hose plate module according to the invention.
  • the center distance between adjacent hose plates is a. In the present exemplary embodiment, this center distance is set to 3 mm.
  • the center distance a can be between 0, 1 and 10 mm, preferably between 0.5 and 5 mm.
  • stabilizing rods 40 are inserted into individual tubes.
  • these consist of metal wires, but in modified embodiments they can also consist of plastic or glass.
  • the adjacent hoses 102 of adjacent hose plates 100 are aligned with one another, so that the hoses of the entire module form a matrix arrangement with regular rows and columns.
  • hose plate module To produce the hose plate module shown in FIG. 1, several hose plates 100 of the same length and width are stacked according to FIG. 4, spacer strips 30 running perpendicular to the individual hoses 102 being interposed. The thickness of the
  • Last 30 corresponds to the center distance a * of adjacent hose plates less an outer diameter de of a hose (see. Fig. 5b).
  • Metal wires 40 are inserted into individual tubes as stabilizing rods.
  • This stack is then immersed in a potting resin with the open end face of the stack visible in FIG. 4 and the end face of the stack not visible in FIG. 4.
  • the hardened sealing resin forms the sealing material plates 20 and 22 shown in FIG. 1. These plates are then removed on the outside. cut to expose the opposite ends of the tubes in the tube plates 100.
  • the module body 2 ′′ thus obtained is arranged in a housing which is shown schematically in FIG. 6.
  • FIG. 6 shows a liquid outlet 10 and a gas outlet 12 in the housing walls 6 and 9 of the tubular plate module.
  • the liquid inlet or the gas outlet is located in each case on the diametrically opposite housing wall sides of the module. It can be seen that the liquid (first fluid) and the gas (second fluid) form a cross flow when they flow through the module.
  • the first fluid does not need to flow through the hoses.
  • the lower end of the hoses can also be closed, so that the fluid (for example a gas) is introduced into the hoses under pressure and abuts against the inner walls of the hoses.
  • the fluid for example a gas
  • the same also applies to the second fluid, which can "line up" in the spaces between the adjacent tube plates without causing an essentially rectified, laminar flow.
  • the spacer strips 30 inserted according to FIG. 4 during the manufacture of the module can be removed after the manufacture of the module, but they can also remain in the tubular plate sleeve and be glued with their respective ends to the inner walls of a housing.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Analytical Chemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • Separation Using Semi-Permeable Membranes (AREA)

Abstract

L'invention concerne un module de plaque tubulaire servant par exemple à la séparation de gaz et fonctionnant en flux croisé. Ce module comprend un corps de module (2) présentant une pluralité de plaques tubulaires à membranes (100) disposées de façon parallèle, et parallèle au plan (z-y) d'un système de coordonnées rectangulaires. Les tuyaux individuels (102) des plaques (100) sont parcourus par un premier fluide dans la direction positive ou négative de l'axe des z. Un deuxième fluide s'écoule en flux croisé à travers les espaces entre les plaques (100) dans la direction de l'axe des y. Les extrémités mutuellement opposées des tuyaux ou des plaques (100) sont maintenues ensemble par des plaques de matériau de scellement (20, 22). Ce module de plaque tubulaire permet de résoudre la majorité des problèmes des modules connus formés de tuyaux individuels, apparaissant lors de la fabrication des modules. En outre, ce module présente une bonne stabilité.
EP97944901A 1996-09-27 1997-09-26 Module de plaque tubulaire Ceased EP0930932A1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE19639964 1996-09-27
DE19639964A DE19639964A1 (de) 1996-09-27 1996-09-27 Hohlfaserplattenmodul und Verfahren zu seiner Herstellung
PCT/EP1997/005294 WO1998013129A1 (fr) 1996-09-27 1997-09-26 Module de plaque tubulaire

Publications (1)

Publication Number Publication Date
EP0930932A1 true EP0930932A1 (fr) 1999-07-28

Family

ID=7807206

Family Applications (1)

Application Number Title Priority Date Filing Date
EP97944901A Ceased EP0930932A1 (fr) 1996-09-27 1997-09-26 Module de plaque tubulaire

Country Status (5)

Country Link
EP (1) EP0930932A1 (fr)
AU (1) AU4624797A (fr)
DE (1) DE19639964A1 (fr)
NO (1) NO991486L (fr)
WO (1) WO1998013129A1 (fr)

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1450930A (zh) * 2000-03-23 2003-10-22 W·L·戈尔有限公司 软管装置
DE10244707A1 (de) * 2002-09-24 2004-04-01 Daimlerchrysler Ag Vorrichtung zum Austausch von Feuchtigkeit zwischen einem feuchten und einem trockenen Gasstrom
DE102005028718A1 (de) 2005-06-20 2006-12-28 Carl Freudenberg Kg Hohlfaseranordnung
US20110239692A1 (en) * 2010-04-01 2011-10-06 Exxonmobil Research And Engineering Company Utilization of waste heat using fiber sorbent system and method of using same
SG184909A1 (en) 2010-04-20 2012-11-29 Fibracast Ltd Formed sheet membrane element and filtration system
KR20200057119A (ko) 2011-10-20 2020-05-25 파이브라케스트 리미티드 성형 시이트 막 요소를 코팅하기 위한 코팅 기기 및 공정
DE102015005100A1 (de) * 2015-04-22 2016-03-03 Mann + Hummel Gmbh Hohlfaseranordnung, Verfahren und Vorrichtung zur Herstellung einer Hohlfaseranordnung, Vorrichtung mit wenigstens einer Hohlfaseranordnung
CN106563335B (zh) * 2016-03-23 2019-01-25 国家海洋局天津海水淡化与综合利用研究所 多功能膜吸收塔

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Publication number Priority date Publication date Assignee Title
NL7904388A (nl) * 1978-06-15 1979-12-18 Mitsubishi Rayon Co Werkwijze en inrichting voor overdracht van gassen.
US4425234A (en) * 1979-07-30 1984-01-10 Hospal Ltd. Hollow fiber separatory device
WO1981002683A1 (fr) * 1980-03-24 1981-10-01 Baxter Travenol Lab Dispositif de diffusion par canaux tubulaires ayant des guides d'ecoulement internes
JPH0696098B2 (ja) * 1988-05-27 1994-11-30 株式会社クラレ 中空糸型流体処理装置
DE4412756C2 (de) * 1994-04-13 1996-06-20 Gore W L & Ass Gmbh Schlaucheinheit und Verfahren zur Herstellung derselben

Non-Patent Citations (1)

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Title
See references of WO9813129A1 *

Also Published As

Publication number Publication date
DE19639964A1 (de) 1998-04-02
WO1998013129A1 (fr) 1998-04-02
AU4624797A (en) 1998-04-17
NO991486D0 (no) 1999-03-26
NO991486L (no) 1999-05-26

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