DE69126692T2 - Zeolitische Membranen - Google Patents
Zeolitische MembranenInfo
- Publication number
- DE69126692T2 DE69126692T2 DE69126692T DE69126692T DE69126692T2 DE 69126692 T2 DE69126692 T2 DE 69126692T2 DE 69126692 T DE69126692 T DE 69126692T DE 69126692 T DE69126692 T DE 69126692T DE 69126692 T2 DE69126692 T2 DE 69126692T2
- Authority
- DE
- Germany
- Prior art keywords
- support
- zeo
- type material
- membranes
- gel
- 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.)
- Expired - Fee Related
Links
- 239000012528 membrane Substances 0.000 title abstract 3
- 239000000463 material Substances 0.000 abstract 3
- 239000013078 crystal Substances 0.000 abstract 2
- 230000015572 biosynthetic process Effects 0.000 abstract 1
- 239000011148 porous material Substances 0.000 abstract 1
- 238000003786 synthesis reaction Methods 0.000 abstract 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D67/00—Processes specially adapted for manufacturing semi-permeable membranes for separation processes or apparatus
- B01D67/0039—Inorganic membrane manufacture
- B01D67/0051—Inorganic membrane manufacture by controlled crystallisation, e,.g. hydrothermal growth
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D67/00—Processes specially adapted for manufacturing semi-permeable membranes for separation processes or apparatus
- B01D67/0039—Inorganic membrane manufacture
- B01D67/0048—Inorganic membrane manufacture by sol-gel transition
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D69/00—Semi-permeable membranes for separation processes or apparatus characterised by their form, structure or properties; Manufacturing processes specially adapted therefor
- B01D69/10—Supported membranes; Membrane supports
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D69/00—Semi-permeable membranes for separation processes or apparatus characterised by their form, structure or properties; Manufacturing processes specially adapted therefor
- B01D69/10—Supported membranes; Membrane supports
- B01D69/108—Inorganic support material
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D71/00—Semi-permeable membranes for separation processes or apparatus characterised by the material; Manufacturing processes specially adapted therefor
- B01D71/02—Inorganic material
- B01D71/028—Molecular sieves
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D71/00—Semi-permeable membranes for separation processes or apparatus characterised by the material; Manufacturing processes specially adapted therefor
- B01D71/02—Inorganic material
- B01D71/028—Molecular sieves
- B01D71/0281—Zeolites
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J29/00—Catalysts comprising molecular sieves
- B01J29/04—Catalysts comprising molecular sieves having base-exchange properties, e.g. crystalline zeolites
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2323/00—Details relating to membrane preparation
- B01D2323/46—Impregnation
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J2229/00—Aspects of molecular sieve catalysts not covered by B01J29/00
- B01J2229/60—Synthesis on support
- B01J2229/64—Synthesis on support in or on refractory materials
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J2229/00—Aspects of molecular sieve catalysts not covered by B01J29/00
- B01J2229/60—Synthesis on support
- B01J2229/66—Synthesis on support on metal supports
-
- B01J35/58—
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10S95/00—Gas separation: processes
- Y10S95/90—Solid sorbent
- Y10S95/902—Molecular sieve
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB909022836A GB9022836D0 (en) | 1990-10-19 | 1990-10-19 | Membranes |
Publications (3)
Publication Number | Publication Date |
---|---|
DE69126692D1 DE69126692D1 (de) | 1997-08-07 |
DE69126692T2 true DE69126692T2 (de) | 1997-10-23 |
DE69126692T3 DE69126692T3 (de) | 2000-11-30 |
Family
ID=10684063
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DE69126692T Expired - Fee Related DE69126692T3 (de) | 1990-10-19 | 1991-10-08 | Zeolitische Membranen |
Country Status (13)
Country | Link |
---|---|
US (3) | US5362522A (de) |
EP (1) | EP0481660B2 (de) |
JP (1) | JPH0543218A (de) |
KR (1) | KR100189210B1 (de) |
AT (1) | ATE154895T1 (de) |
AU (1) | AU8473991A (de) |
CA (1) | CA2052289C (de) |
DE (1) | DE69126692T3 (de) |
ES (1) | ES2102997T5 (de) |
GB (1) | GB9022836D0 (de) |
NZ (1) | NZ239958A (de) |
TW (1) | TW201276B (de) |
ZA (1) | ZA917712B (de) |
Families Citing this family (68)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB9022836D0 (en) * | 1990-10-19 | 1990-12-05 | British Petroleum Co Plc | Membranes |
GB9206783D0 (en) * | 1992-03-27 | 1992-05-13 | British Petroleum Co Plc | Deposition process |
DK0632744T3 (de) * | 1992-03-27 | 1997-09-01 | Stichting Energie | |
US5618435A (en) * | 1992-03-31 | 1997-04-08 | Inrad | Synthesis of inorganic membranes including metals |
US5779904A (en) * | 1992-03-31 | 1998-07-14 | Inrad | Synthesis of inorganic membranes on supports |
NL9201204A (nl) * | 1992-07-06 | 1994-02-01 | Stichting Tech Wetenschapp | Membraan. |
US5543047A (en) | 1992-11-06 | 1996-08-06 | Pall Corporation | Filter with over-laid pleats in intimate contact |
BR9406483A (pt) * | 1993-04-23 | 1996-01-09 | Exxon Chemical Patents Inc | Camada e processos para preparar a mesma para separar uma mistura fluida e para catalisar uma reaç o quimica |
US5464798A (en) * | 1994-02-24 | 1995-11-07 | Jia; Meng-Dong | Ceramic-zeolite composite membranes and use for separation of vapor/gas mixtures |
US5824617A (en) * | 1994-07-08 | 1998-10-20 | Exxon Research & Engineering Company | Low alkaline inverted in-situ crystallized zeolite membrane |
US5871650A (en) * | 1994-07-08 | 1999-02-16 | Exxon Research And Engineering Company | Supported zeolite membranes with controlled crystal width and preferred orientation grown on a growth enhancing layer |
US5968366A (en) * | 1994-07-08 | 1999-10-19 | Exxon Research And Engineering Company | Zeolite containing composition with a selectivity enhancing coating |
US5716527A (en) * | 1994-07-08 | 1998-02-10 | Exxon Research & Engineering Company | Zeolite membrane with a selectivity enhancing coating |
US5672388A (en) * | 1994-07-08 | 1997-09-30 | Exxon Research & Engineering Company | Membrane reparation and poer size reduction using interfacial ozone assisted chemical vapor deposition |
GB9413863D0 (en) * | 1994-07-08 | 1994-08-24 | Exxon Chemical Patents Inc | Molecular sieves and processes for their manufacture |
JPH10507155A (ja) * | 1994-09-20 | 1998-07-14 | ブラットン,グラハム,ジョン | 改良膜 |
GB9423805D0 (en) * | 1994-11-25 | 1995-01-11 | Bratton Graham J | Dehydration apparatus |
GB9502292D0 (en) * | 1995-02-06 | 1995-03-29 | Bratton Graham J | Adsorbent material |
US5772735A (en) * | 1995-11-02 | 1998-06-30 | University Of New Mexico | Supported inorganic membranes |
GB9523854D0 (en) * | 1995-11-22 | 1996-01-24 | Bratton Graham J | Water removal device |
FR2742071B1 (fr) | 1995-12-08 | 1998-01-09 | Inst Francais Du Petrole | Procede d'elaboration de membranes de zeolithe supportee par du verre poreux |
FR2742070B1 (fr) | 1995-12-08 | 1998-01-09 | Inst Francais Du Petrole | Procede d'elaboration controlee de membranes de zeolithe supportee |
DE69706522T2 (de) * | 1996-01-25 | 2002-05-02 | Exxonmobil Res & Eng Co | Trennungsverfahren in dem eine membran verwendet wird |
CN1061900C (zh) * | 1996-06-05 | 2001-02-14 | 中国石油化工总公司 | Sapo-34/陶瓷复合分离膜及其制备 |
CN1069848C (zh) * | 1996-06-05 | 2001-08-22 | 中国石油化工总公司 | 丝光沸石/金属或陶瓷催化复合材料及其制备 |
CN1058643C (zh) * | 1996-07-22 | 2000-11-22 | 中国石油化工总公司 | Zsm-5/金属或陶瓷催化复合材料及其制备 |
US6043177A (en) * | 1997-01-21 | 2000-03-28 | University Technology Corporation | Modification of zeolite or molecular sieve membranes using atomic layer controlled chemical vapor deposition |
US6060415A (en) * | 1997-02-10 | 2000-05-09 | National Science Council | Aligned molecular sieve crystals grown on anodic alumina membrane |
GB9723253D0 (en) * | 1997-11-04 | 1998-01-07 | Bratton Graham J | Water treatment process |
JP3686262B2 (ja) * | 1998-07-27 | 2005-08-24 | 三井造船株式会社 | 混合物分離膜 |
GB9821706D0 (en) * | 1998-10-07 | 1998-12-02 | Bratton Graham J | Membrane structure |
CN1067710C (zh) * | 1998-11-26 | 2001-06-27 | 中国石油化工集团公司 | 含zsm-5沸石的脱氮氧化物催化剂的制备方法 |
US6440885B1 (en) | 1998-12-30 | 2002-08-27 | Corning Incorporated | Zeolite membrane and a process for the production thereof |
US6649255B1 (en) | 1999-03-04 | 2003-11-18 | Douglas E. Fain, Sr. | Article and method for producing extremely small pore inorganic membranes |
US6767384B1 (en) * | 2000-01-21 | 2004-07-27 | The Regents Of The University Of Colorado | Isomorphously substituted molecular sieve membranes |
US6500490B1 (en) | 2000-03-23 | 2002-12-31 | Honeywell International Inc. | Hydrophilic zeolite coating |
US6340433B1 (en) * | 2000-09-15 | 2002-01-22 | Engelhard Corporation | Water purification using titanium silicate membranes |
US20020114958A1 (en) * | 2000-11-27 | 2002-08-22 | Toray Industries, Inc. | Method of coating zeolite crystals, substrate containing zeolite crystals, method of manufacturing zeolite membrane, method of processing zeolite membrane, zeolite membrane, aluminum electrolytic capacitor, degassing membrane and separation method |
US7476635B2 (en) * | 2002-06-03 | 2009-01-13 | Institut Francais Du Petrole | Process for making supported thin zeolite membrane |
US6962660B2 (en) * | 2002-09-25 | 2005-11-08 | Master Spas, Inc. | Fluid filter system with secondary flow path for augmented filtration |
KR100460450B1 (ko) * | 2002-10-04 | 2004-12-08 | 한국화학연구원 | 함침-롤링법에 의한 열적 안정성이 우수한 실리카 복합막의 제조방법 |
DE10250468A1 (de) * | 2002-10-30 | 2004-05-19 | Basf Ag | Verfahren zur Herstellung von Oligomeren abgeleitet von Butenen |
US20050067344A1 (en) * | 2003-09-30 | 2005-03-31 | Kabushiki Kaisha Kobe Seiko Sho (Kobe Steel, Ltd.) | Zeolite membrane support and zeolite composite membrane |
US7316727B2 (en) * | 2004-03-19 | 2008-01-08 | The Regents Of The University Of Colorado | High-selectivity supported SAPO membranes |
AU2005271542A1 (en) * | 2004-08-03 | 2006-02-16 | The Regents Of The University Of Colorado | Membranes for highly selective separations |
JP4751996B2 (ja) * | 2005-03-14 | 2011-08-17 | 三井造船株式会社 | Zsm−5型ゼオライト膜の製造方法 |
JP5142984B2 (ja) | 2005-04-29 | 2013-02-13 | ヴラームス インステリング ヴール テクノロギシュ オンデルゾーク | 液体、固体または気体物質の精製及び殺菌のための装置及び方法 |
JP4852930B2 (ja) * | 2005-08-12 | 2012-01-11 | 三菱化学株式会社 | 管端部接続体及びゼオライト分離膜エレメント |
JP2007203209A (ja) * | 2006-02-02 | 2007-08-16 | Denso Corp | 触媒体および無機担体および無機担体の製造方法 |
US8409326B2 (en) * | 2006-05-15 | 2013-04-02 | The Regents Of The University Of Colorado | High flux and selectivity SAPO-34 membranes for CO2/CH4separations |
WO2007144247A1 (de) * | 2006-06-13 | 2007-12-21 | Basf Se | Verfahren zur herstellung einer komposit-membran |
ITMI20061231A1 (it) * | 2006-06-26 | 2007-12-27 | Eni Spa | Proxcesso e materiali zeolitici per la separazione di gas |
JP5324067B2 (ja) * | 2006-08-22 | 2013-10-23 | 日本碍子株式会社 | ゼオライト膜の製造方法 |
WO2008112520A1 (en) * | 2007-03-09 | 2008-09-18 | The Regents Of The University Of Colorado, A Body Corporate | Synthesis of zeolites and zeolite membranes using multiple structure directing agents |
GB0704797D0 (en) * | 2007-03-13 | 2007-04-18 | Phoenix Ipr Ltd | Membrane structures and their production and use |
GB0705079D0 (en) * | 2007-03-16 | 2007-04-25 | Phoenix Ipr Ltd | Process and apparatus for treatment of organic solvents |
US20090000475A1 (en) * | 2007-06-29 | 2009-01-01 | Curtis Robert Fekety | Zeolite membrane structures and methods of making zeolite membrane structures |
EP2048261A1 (de) * | 2007-10-12 | 2009-04-15 | ArcelorMittal France | Industrieller Dampferzeuger zum Aufbringen einer Legierungsschicht auf einem Metallband |
CN101306327B (zh) * | 2008-07-08 | 2012-03-14 | 大连理工大学 | 一种卷式炭膜及其制备方法 |
WO2010110274A1 (ja) | 2009-03-24 | 2010-09-30 | 三菱化学株式会社 | ゼオライト膜、分離膜、および成分分離方法 |
JP5153809B2 (ja) * | 2010-03-15 | 2013-02-27 | 三井造船株式会社 | ゼオライト膜製造方法 |
AU2011245307B2 (en) | 2010-04-29 | 2014-10-09 | The Regents Of The University Of Colorado, A Body Corporate | High flux SAPO-34 membranes for CO2/CH4 separation and template removal method |
CN102600735B (zh) * | 2012-03-29 | 2014-09-03 | 吉林大学 | 一种无机相分离膜及其在油水分离中的应用 |
US8715391B2 (en) * | 2012-04-10 | 2014-05-06 | Milliken & Company | High temperature filter |
JP6559146B2 (ja) * | 2014-09-30 | 2019-08-14 | 日本碍子株式会社 | 分離膜構造体の製造方法 |
RU2596257C1 (ru) * | 2015-04-29 | 2016-09-10 | Открытое акционерное общество "Нефтяная компания "Роснефть" | Способ фракционирования смесей низкомолекулярных углеводородов с использованием капиллярной конденсации на микропористых мембранах |
CN108636441B (zh) * | 2018-04-28 | 2021-03-19 | 南京理工大学 | 一种掺杂纳米金属纤维的分子筛及制备方法和应用 |
US11154823B2 (en) | 2018-10-05 | 2021-10-26 | The Board Of Regents For Oklahoma State University | Zeolite-coated mesh for oil-water separation |
Family Cites Families (26)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3244643A (en) * | 1965-02-03 | 1966-04-05 | Socony Mobil Oil Co Inc | Method of preparing supported crystalline aluminosilicate composition |
US3368981A (en) * | 1965-07-02 | 1968-02-13 | Mobil Oil Corp | Utilization of superactive catalytic materials |
FR2039527A5 (en) * | 1969-04-02 | 1971-01-15 | Commissariat Energie Atomique | Catalyst support for exhaust gases for - automobiles |
US3730910A (en) * | 1971-02-02 | 1973-05-01 | Grace W R & Co | Novel zeolite surfaces |
US4199477A (en) * | 1975-03-27 | 1980-04-22 | General Motors Corporation | Method for application of porous wash coats to low porosity refractory catalytic monoliths and the resulting support |
FR2507920B1 (fr) * | 1981-06-22 | 1986-05-16 | Rhone Poulenc Spec Chim | Support de catalyseur, notamment de catalyseur de post-combustion et procede de fabrication de ce support |
JPS60500362A (ja) * | 1982-12-17 | 1985-03-22 | ロ−ヌ−プ−ラン スペシアリテ シミ−ク | 触媒、特に後燃焼用触媒の担体及びこの担体の製造方法 |
GB8317228D0 (en) * | 1983-06-24 | 1983-07-27 | Exxon Research Engineering Co | Magnetizable adsorbents |
JPS6028826A (ja) * | 1983-07-26 | 1985-02-14 | Hiroshi Suzuki | かご型ゼオライト薄膜表層を有する複合膜及びその製造法 |
GB8334626D0 (en) * | 1983-12-30 | 1984-02-08 | Exxon Research Engineering Co | Zeolite coated substrates |
CA1235684A (en) * | 1984-10-10 | 1988-04-26 | Satoshi Sakurada | Membraneous synthetic zeolite and process for producing the same |
JPH0628706B2 (ja) * | 1984-10-30 | 1994-04-20 | 宏志 鈴木 | ゼオライト,層間利用化合物又は結晶格子間利用化合物を多孔質支持体の細孔内に保有する複合体及びその製造法 |
DE3679990D1 (de) * | 1986-07-29 | 1991-08-01 | Gft Ges Fuer Trenntechnik | Pervaporationsverfahren und -membran. |
US4957890A (en) * | 1986-12-29 | 1990-09-18 | Aluminum Company Of America | Surface treated permeable inorganic membranes and method of making same |
JPS63287504A (ja) * | 1987-05-19 | 1988-11-24 | Ngk Insulators Ltd | 分離膜 |
JP2501825B2 (ja) * | 1987-05-26 | 1996-05-29 | 出光興産株式会社 | 膜状合成ゼオライトの製造方法 |
US4906524A (en) * | 1987-05-29 | 1990-03-06 | Orient Watch Co., Ltd. | Surface-coated article and a method for the preparation thereof |
US4800187A (en) * | 1987-10-28 | 1989-01-24 | Corning Glass Works | Method of crystallizing a zeolite on the surface of a monolithic ceramic substrate |
US4904518A (en) * | 1988-06-29 | 1990-02-27 | Uop | Multiphase composite and processes for preparing same |
DE3827049A1 (de) * | 1988-08-10 | 1990-02-15 | Schulten Rudolf Prof Dr | Zeolithisches molekularsieb zur trennung von fluiden |
US5104425A (en) * | 1989-11-14 | 1992-04-14 | Air Products And Chemicals, Inc. | Gas separation by adsorbent membranes |
US5019263A (en) * | 1990-06-05 | 1991-05-28 | Mobil Oil Corp. | Membrane composed of a pure molecular sieve |
GB9022836D0 (en) * | 1990-10-19 | 1990-12-05 | British Petroleum Co Plc | Membranes |
JPH05105420A (ja) * | 1991-03-29 | 1993-04-27 | Ngk Insulators Ltd | ゼオライト結晶体の合成膜およびその製造方法 |
US5258339A (en) * | 1992-03-12 | 1993-11-02 | Worcester Polytechnic Institute | Formation of zeolite membranes from sols |
US5248643A (en) * | 1992-11-23 | 1993-09-28 | Corning Incorporated | Mixed zeolites and method for producing same |
-
1990
- 1990-10-19 GB GB909022836A patent/GB9022836D0/en active Pending
-
1991
- 1991-09-25 AU AU84739/91A patent/AU8473991A/en not_active Abandoned
- 1991-09-26 NZ NZ239958A patent/NZ239958A/en unknown
- 1991-09-26 ZA ZA917712A patent/ZA917712B/xx unknown
- 1991-09-26 CA CA002052289A patent/CA2052289C/en not_active Expired - Lifetime
- 1991-09-27 TW TW080107680A patent/TW201276B/zh active
- 1991-10-08 EP EP91309239A patent/EP0481660B2/de not_active Expired - Lifetime
- 1991-10-08 DE DE69126692T patent/DE69126692T3/de not_active Expired - Fee Related
- 1991-10-08 ES ES91309239T patent/ES2102997T5/es not_active Expired - Lifetime
- 1991-10-08 AT AT91309239T patent/ATE154895T1/de not_active IP Right Cessation
- 1991-10-18 JP JP3297657A patent/JPH0543218A/ja active Pending
- 1991-10-18 KR KR1019910018418A patent/KR100189210B1/ko not_active IP Right Cessation
-
1993
- 1993-01-27 US US08/009,425 patent/US5362522A/en not_active Expired - Lifetime
-
1994
- 1994-08-04 US US08/285,897 patent/US5567664A/en not_active Expired - Lifetime
-
1995
- 1995-06-06 US US08/467,181 patent/US5605631A/en not_active Expired - Lifetime
Also Published As
Publication number | Publication date |
---|---|
AU8473991A (en) | 1992-04-30 |
JPH0543218A (ja) | 1993-02-23 |
US5605631A (en) | 1997-02-25 |
TW201276B (de) | 1993-03-01 |
US5567664A (en) | 1996-10-22 |
DE69126692D1 (de) | 1997-08-07 |
ES2102997T3 (es) | 1997-08-16 |
EP0481660B2 (de) | 2000-08-23 |
CA2052289A1 (en) | 1992-04-20 |
EP0481660B1 (de) | 1997-07-02 |
ZA917712B (en) | 1993-03-26 |
ATE154895T1 (de) | 1997-07-15 |
EP0481660A1 (de) | 1992-04-22 |
KR920007678A (ko) | 1992-05-27 |
DE69126692T3 (de) | 2000-11-30 |
ES2102997T5 (es) | 2000-12-01 |
KR100189210B1 (ko) | 1999-06-01 |
CA2052289C (en) | 2002-02-26 |
NZ239958A (en) | 1992-09-25 |
US5362522A (en) | 1994-11-08 |
GB9022836D0 (en) | 1990-12-05 |
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