TW494087B - Method to remove metal cation - Google Patents
Method to remove metal cation Download PDFInfo
- Publication number
- TW494087B TW494087B TW088119436A TW88119436A TW494087B TW 494087 B TW494087 B TW 494087B TW 088119436 A TW088119436 A TW 088119436A TW 88119436 A TW88119436 A TW 88119436A TW 494087 B TW494087 B TW 494087B
- Authority
- TW
- Taiwan
- Prior art keywords
- metal
- cation
- exchange resin
- iron
- organic compound
- Prior art date
Links
- 229910052751 metal Inorganic materials 0.000 title claims abstract description 31
- 239000002184 metal Substances 0.000 title claims abstract description 31
- 238000000034 method Methods 0.000 title claims abstract description 28
- 150000001768 cations Chemical class 0.000 title claims abstract description 27
- NWUYHJFMYQTDRP-UHFFFAOYSA-N 1,2-bis(ethenyl)benzene;1-ethenyl-2-ethylbenzene;styrene Chemical compound C=CC1=CC=CC=C1.CCC1=CC=CC=C1C=C.C=CC1=CC=CC=C1C=C NWUYHJFMYQTDRP-UHFFFAOYSA-N 0.000 claims abstract description 22
- 239000003729 cation exchange resin Substances 0.000 claims abstract description 20
- 150000002894 organic compounds Chemical class 0.000 claims abstract description 18
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 37
- 229910052742 iron Inorganic materials 0.000 claims description 19
- SIOXPEMLGUPBBT-UHFFFAOYSA-N picolinic acid Chemical compound OC(=O)C1=CC=CC=N1 SIOXPEMLGUPBBT-UHFFFAOYSA-N 0.000 claims description 4
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 claims description 3
- 239000003456 ion exchange resin Substances 0.000 claims description 3
- 229920003303 ion-exchange polymer Polymers 0.000 claims description 3
- 238000004064 recycling Methods 0.000 claims description 3
- 239000002253 acid Substances 0.000 claims description 2
- 229910052804 chromium Inorganic materials 0.000 claims description 2
- 239000011651 chromium Substances 0.000 claims description 2
- 229940081066 picolinic acid Drugs 0.000 claims description 2
- VGGSQFUCUMXWEO-UHFFFAOYSA-N Ethene Chemical compound C=C VGGSQFUCUMXWEO-UHFFFAOYSA-N 0.000 claims 1
- 239000005977 Ethylene Substances 0.000 claims 1
- -1 gold cations Chemical class 0.000 description 8
- 239000010931 gold Substances 0.000 description 6
- 229910052737 gold Inorganic materials 0.000 description 6
- VTLYFUHAOXGGBS-UHFFFAOYSA-N Fe3+ Chemical compound [Fe+3] VTLYFUHAOXGGBS-UHFFFAOYSA-N 0.000 description 5
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 description 5
- 239000011347 resin Substances 0.000 description 5
- 229920005989 resin Polymers 0.000 description 5
- 239000002699 waste material Substances 0.000 description 5
- 238000005202 decontamination Methods 0.000 description 3
- 230000003588 decontaminative effect Effects 0.000 description 3
- 239000010410 layer Substances 0.000 description 3
- 238000005025 nuclear technology Methods 0.000 description 3
- 239000011241 protective layer Substances 0.000 description 3
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 2
- 239000000470 constituent Substances 0.000 description 2
- 230000002079 cooperative effect Effects 0.000 description 2
- UQSXHKLRYXJYBZ-UHFFFAOYSA-N iron oxide Inorganic materials [Fe]=O UQSXHKLRYXJYBZ-UHFFFAOYSA-N 0.000 description 2
- 150000002739 metals Chemical class 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- JTXMVXSTHSMVQF-UHFFFAOYSA-N 2-acetyloxyethyl acetate Chemical compound CC(=O)OCCOC(C)=O JTXMVXSTHSMVQF-UHFFFAOYSA-N 0.000 description 1
- BDDLHHRCDSJVKV-UHFFFAOYSA-N 7028-40-2 Chemical compound CC(O)=O.CC(O)=O.CC(O)=O.CC(O)=O BDDLHHRCDSJVKV-UHFFFAOYSA-N 0.000 description 1
- 229910052778 Plutonium Inorganic materials 0.000 description 1
- XCYOHCWRRZZRHL-UHFFFAOYSA-N acetic acid;ethene Chemical compound C=C.CC(O)=O.CC(O)=O XCYOHCWRRZZRHL-UHFFFAOYSA-N 0.000 description 1
- 150000007513 acids Chemical class 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 229940023913 cation exchange resins Drugs 0.000 description 1
- 239000013043 chemical agent Substances 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 238000011109 contamination Methods 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 125000004122 cyclic group Chemical group 0.000 description 1
- 238000004090 dissolution Methods 0.000 description 1
- 230000003628 erosive effect Effects 0.000 description 1
- DEFVIWRASFVYLL-UHFFFAOYSA-N ethylene glycol bis(2-aminoethyl)tetraacetic acid Chemical compound OC(=O)CN(CC(O)=O)CCOCCOCCN(CC(O)=O)CC(O)=O DEFVIWRASFVYLL-UHFFFAOYSA-N 0.000 description 1
- 238000002309 gasification Methods 0.000 description 1
- 235000000396 iron Nutrition 0.000 description 1
- 235000013980 iron oxide Nutrition 0.000 description 1
- VBMVTYDPPZVILR-UHFFFAOYSA-N iron(2+);oxygen(2-) Chemical class [O-2].[Fe+2] VBMVTYDPPZVILR-UHFFFAOYSA-N 0.000 description 1
- HEQBUZNAOJCRSL-UHFFFAOYSA-N iron(ii) chromite Chemical compound [O-2].[O-2].[O-2].[Cr+3].[Fe+3] HEQBUZNAOJCRSL-UHFFFAOYSA-N 0.000 description 1
- 229910021645 metal ion Inorganic materials 0.000 description 1
- 229910052759 nickel Inorganic materials 0.000 description 1
- OYEHPCDNVJXUIW-UHFFFAOYSA-N plutonium atom Chemical compound [Pu] OYEHPCDNVJXUIW-UHFFFAOYSA-N 0.000 description 1
- 230000002285 radioactive effect Effects 0.000 description 1
- 230000002000 scavenging effect Effects 0.000 description 1
- ONHSTXDKEXKNQL-UHFFFAOYSA-N secretin porcine pentaacetate Chemical compound CC(O)=O.CC(O)=O.CC(O)=O.CC(O)=O.CC(O)=O ONHSTXDKEXKNQL-UHFFFAOYSA-N 0.000 description 1
- 239000000758 substrate Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Classifications
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- G—PHYSICS
- G21—NUCLEAR PHYSICS; NUCLEAR ENGINEERING
- G21F—PROTECTION AGAINST X-RADIATION, GAMMA RADIATION, CORPUSCULAR RADIATION OR PARTICLE BOMBARDMENT; TREATING RADIOACTIVELY CONTAMINATED MATERIAL; DECONTAMINATION ARRANGEMENTS THEREFOR
- G21F9/00—Treating radioactively contaminated material; Decontamination arrangements therefor
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/42—Treatment of water, waste water, or sewage by ion-exchange
-
- 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
- B01J39/00—Cation exchange; Use of material as cation exchangers; Treatment of material for improving the cation exchange properties
- B01J39/04—Processes using organic exchangers
-
- G—PHYSICS
- G21—NUCLEAR PHYSICS; NUCLEAR ENGINEERING
- G21F—PROTECTION AGAINST X-RADIATION, GAMMA RADIATION, CORPUSCULAR RADIATION OR PARTICLE BOMBARDMENT; TREATING RADIOACTIVELY CONTAMINATED MATERIAL; DECONTAMINATION ARRANGEMENTS THEREFOR
- G21F9/00—Treating radioactively contaminated material; Decontamination arrangements therefor
- G21F9/04—Treating liquids
- G21F9/06—Processing
-
- G—PHYSICS
- G21—NUCLEAR PHYSICS; NUCLEAR ENGINEERING
- G21F—PROTECTION AGAINST X-RADIATION, GAMMA RADIATION, CORPUSCULAR RADIATION OR PARTICLE BOMBARDMENT; TREATING RADIOACTIVELY CONTAMINATED MATERIAL; DECONTAMINATION ARRANGEMENTS THEREFOR
- G21F9/00—Treating radioactively contaminated material; Decontamination arrangements therefor
- G21F9/04—Treating liquids
- G21F9/06—Processing
- G21F9/12—Processing by absorption; by adsorption; by ion-exchange
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/30—Treatment of water, waste water, or sewage by irradiation
- C02F1/32—Treatment of water, waste water, or sewage by irradiation with ultraviolet light
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/70—Treatment of water, waste water, or sewage by reduction
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/42—Treatment of water, waste water, or sewage by ion-exchange
- C02F2001/425—Treatment of water, waste water, or sewage by ion-exchange using cation exchangers
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2101/00—Nature of the contaminant
- C02F2101/006—Radioactive compounds
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2101/00—Nature of the contaminant
- C02F2101/10—Inorganic compounds
- C02F2101/20—Heavy metals or heavy metal compounds
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2101/00—Nature of the contaminant
- C02F2101/10—Inorganic compounds
- C02F2101/20—Heavy metals or heavy metal compounds
- C02F2101/203—Iron or iron compound
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2101/00—Nature of the contaminant
- C02F2101/10—Inorganic compounds
- C02F2101/20—Heavy metals or heavy metal compounds
- C02F2101/22—Chromium or chromium compounds, e.g. chromates
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- General Engineering & Computer Science (AREA)
- High Energy & Nuclear Physics (AREA)
- Physics & Mathematics (AREA)
- Organic Chemistry (AREA)
- Life Sciences & Earth Sciences (AREA)
- Water Supply & Treatment (AREA)
- Environmental & Geological Engineering (AREA)
- Hydrology & Water Resources (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Treatment Of Water By Ion Exchange (AREA)
- Physical Water Treatments (AREA)
- Removal Of Specific Substances (AREA)
- Treatment Of Water By Oxidation Or Reduction (AREA)
- Processing Of Solid Wastes (AREA)
Description
經濟部智慧財產局員工消費合作社印製 494087 A7 __JB7^_ 五、發明說明(1) 本發明是有關一種方法,其藉由在陽離子交換樹脂中 的結合,而去除金颶陽離子。 在通常去除污染的方法之中會産生金羼陽離子,其必 須被去除。因此,此陽離子,其在被溶解的腐蝕所産生 的經常的陽離子,是在離子交換樹脂上進行而被結合。 然而它本身還可以以陽離子處理,其來自不再須要的保 護層。此種保護層是必須的,以防止在清除污染期間對 基材金屬之侵蝕。此等陽離子還可以具有放射性。 由DE 4 1 1 7 6 2 5 C2可得知一種清除方法,其尤其可 以用於清除金颶構件表面之污染。此外,此種方法提供 ,由陽離子交換樹脂溶液所結合之金屬陽離子,以清除 化學劑來再生c首先,三價的鐵被還原成二價的鐵,此 三價的鐵不能完全由溶液中去除。重要的是,此清除化 學劑可再生。 本發明以此課題為基礎,其規範一種去除金屬陽離子 的方法,其以明顯的較迄今通常為少的陽離子交換樹脂 也可以達到目的。因此它應該改善陽離子交換樹脂的容 量,以産生較迄今為少的負載陽離子交換樹脂,其為去 除廢物時所必須。 根據本發明的目的因而獲得解決,此形成金屬離子之 金屬的原子價的值變得最小,並且此金羼陽離子,其金 颶具有最低的原子價,在陽離子交換樹脂中結合。 本發明是基於此認知,卽當金屬陽離子之金颶的原子 價較小時,在相同數量的陽離子交換樹脂中,可以化合 本紙張尺度適用中國國家標準(CNS)A4規格(210 X 297公釐) I,— :--------衣------- 訂—^------ (請先閱讀背面之注音?事項再填寫本頁) 494087 經濟部智慧財產局員工消費合作社印製 A7 B7 五、發明說明(2 ) 更多的金屬陽離子。因此而至高無上此優點,即可以以 少量的陽離子交換樹脂,以便結合相同數董的金屬陽離 子。只要以根據本發明所設計的方法,使得金屬的原子 價變小至可能的最低值。因此産生較小負載的陽離子交 換樹脂,此對於樹脂有利地須要較小的廢物處理容量。 例如當將金屬由二價轉換成一價時,須要50%較少的 樹脂。當將金屬由三價變成為二價時,須要33%較少的 樹脂。它因此産生顯箸的節省。 此金屬的價數是例如是經由在溶液中金靥陽離子 的還原而變小,此種化學方法是可以相當容易地實行。 例如將在溶液之中之有機化合物的陽離子還原,並且 然後對此溶液以紫外光(UV)照射。 特別合適的有機化合物是乙二酸四乙酸(EDTA)或皮考 林酸。它還可以使用這些酸的混合物。例如此方法可以 修改,使得此有機化合物與所結合的金颶陽離子在陽離 子交換樹脂中再度産生,並且在一個循環製程中可以再 被使用。因此得到比特別的優點,即此有機化合物,例 如是乙二函f四乙酸(EDTA),不須要經常的供應,而可以 以相當少數量之有機化合物達成目的。 此金羼陽離子的金羼例如是鐵,鎳及/或鉻待別是金 屬鐵,其首先至少部份是三價,此三價的鐵然後被轉變 成兩價。 在氧化層中,其應被去除的是,除了經常存在的兩價 錁化鐵之外並有三價的鉻化鐵之兩種穩定的價位,即兩 本紙張尺度適用中國國家標準(CNS)A4規格(210 X 297公釐) I* ----------------訂---;----.— (請先閱讀背面之注意事項再填寫本頁) 經濟部智慧財產局員工消費合作社印製 494087 A7 B7_ 五、發明說明(3 ) 價與三價。鐵是此種層的主要構成成份。此由氣化物構 成的靥中三價鐵的成份可以取決於可去除污染的核子技 術裝置之特性而大於90 %。因此而産生,僅僅藉由將三 價的鐵轉變成兩價的鐵,此待去除之廢物數量大約減少 30%。因此可以有利地節省30%陽離子交換樹脂,所以 可以以顯箸較小的廢物處理容積達成目的。 以根據本發明的方法,可以尤其獾得其優點,必須去 除少量的陽離子交換樹脂,然而還有此形成的陽離子由 於其金屬較少的價數而牢固地結合於樹脂之上。此意味 箸此陽離子交換樹脂的突破未必是真的。因此所得出陽 離子的缺點經由陽離子交換樹脂而減少。其包括對於裝 置的清洗時間,此還包含從所使用的溶液去除陽離子的 時間,顯箸地縮短。其裝置停機時間,尤其是核子技術 裝置的停機時間,其對於去除污染的目的是有利的較以 前為短。 以下是各値化學反應,其在根據本發明的方法的進行 期間,根據一些例子而列舉。因此其說明像是三價鐵的 陽離子之去除: 三價鐵的氧化物可以在核子技術的裝置之中是具有污 染的層或是保護層之組成部份。 首先是由一個此種三價鐵之氧化物借助於一個有機化 合物,例如是借助於乙二四乙酸(EDTA),其形成一種 三價鐵之有機化合物,它是存在於稀薄的溶液之中。因 此是三價鐵之溶液組成成份之陽離子。 本紙張尺度適用中國國家標準(CNS)A4規格(210 X 297公釐) 丨:---Ί--------------^—訂---a------ (請先閱讀背面之注意事項再填寫本頁) 494087 A7 B7 五、發明說明(4 ) 在一個第二步驟之中,此三價鐵之有機化合物的溶液 以紫外線光照射。它因此産生二價鐵以及二氣化破之有 機化合物溶液。由EP 0 753 196 B1可以得知以紫外光 照射以還原鐵之方法。 在第三步驟之中,此現在存有之二價鐵之有機化合物 溶液經由陽離子交換樹脂的伴隨。在那裡此二僙鐵的陽 離子被結合。其存留此有機化合物,例如是乙二®务四乙 酸(EDTA),其於第一步驟中使用。在一循環製程之中, 此在第三步驟中所發展的有機化合物可以於第一步驟中 再使用,甚至其他三價鐵的氣化物應該被清除。 當所有的二價鐵的氧化物被清除,而存留剩餘少量的 有機化合物。這可以用熟知的方法,例如以EP 0 527 416 B1的方法去除。此外只剩餘存留水,二氣化碩,以及一 値相對於熟知方法顯著變小數置的剩餘陽離子交換樹脂 ,其只包含二價鐵陽離子。 此有利地産生如此少的陽離子交換樹脂,以一値小的 廢物處理容器就可以將其裝載。 (請先閱讀背面之注音心事項再填寫本頁) 經濟部智慧財產局員工消費合作社印製 本紙張尺度適用中國國家標準(CNS)A4規格(210 X 297公釐)
Claims (1)
- 494087六、申請專利範圍 第88119436號「去除金屬陽離子所用之方法」專利案 (90年12月修正) Λ申請專利範圍 1· 一種藉由在陽離子交換樹脂中結合的方式而去除金屬陽 離子之方法,其特徵爲: 將形成金屬陽離子之金屬的價數變成爲可能的最低値, 並且此金屬陽離子,其金屬具有可能的最低價數,是在 陽離子交換樹脂中結合。 2·如申請專利範圍第1項之方法,其中 此金屬的價數經由在溶液中金屬陽離子的還原而變小。 3·如申請專利範圍第2項之方法,其中 將有機化合物在所提供的溶液中還原,並且然後此溶液 以紫外光照射。 4. 如申請專利範圍第3項之方法,其中 此有機化合物是乙二綠四乙酸(EDTA)或皮考林酸。 5. 如申請專利範圍第3項之方法,其中 此有機化合物與金屬陽離子的結合是在離子交換樹脂中 再度產生,並且於循環製程中再度使用。 6·如申請專利範圍第4項之方法,其中 此有機化合物與金屬陽離子的結合是在離子交換樹脂中 再度產生,並且於循環製程中再度使用。 7·如申請專利範圍第1至6項中任一項之方法,其中 此金屬是鐵、鎮、及/或鉻。 8·如申請專利範圍第7項之方法,其中 此金屬首先至少部份是三價鐵,並且此三價鐵被轉變成 二價鐵。
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
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DE19851850 | 1998-11-10 |
Publications (1)
Publication Number | Publication Date |
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TW494087B true TW494087B (en) | 2002-07-11 |
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Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
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TW088119436A TW494087B (en) | 1998-11-10 | 1999-11-06 | Method to remove metal cation |
Country Status (7)
Country | Link |
---|---|
US (1) | US20010031232A1 (zh) |
EP (1) | EP1141975A2 (zh) |
JP (1) | JP2002529751A (zh) |
KR (1) | KR20010080404A (zh) |
CA (1) | CA2350206A1 (zh) |
TW (1) | TW494087B (zh) |
WO (1) | WO2000028553A2 (zh) |
Family Cites Families (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3664870A (en) * | 1969-10-29 | 1972-05-23 | Nalco Chemical Co | Removal and separation of metallic oxide scale |
JPH0651567B2 (ja) * | 1986-01-29 | 1994-07-06 | 住友化学工業株式会社 | 希有金属の回収方法 |
US4943357A (en) * | 1988-06-27 | 1990-07-24 | Photo Redux Corp. | Photodegradation of metal chelate complexes |
DE4117625C2 (de) * | 1991-05-29 | 1997-09-04 | Siemens Ag | Reinigungsverfahren |
US5205999A (en) * | 1991-09-18 | 1993-04-27 | British Nuclear Fuels Plc | Actinide dissolution |
DE4410747A1 (de) * | 1994-03-28 | 1995-10-05 | Siemens Ag | Verfahren und Einrichtung zum Entsorgen einer Lösung, die eine organische Säure enthält |
DE4423398A1 (de) * | 1994-07-04 | 1996-01-11 | Siemens Ag | Verfahren und Einrichtung zum Entsorgen eines Kationenaustauschers |
-
1999
- 1999-10-25 EP EP99962033A patent/EP1141975A2/de not_active Withdrawn
- 1999-10-25 WO PCT/DE1999/003405 patent/WO2000028553A2/de not_active Application Discontinuation
- 1999-10-25 CA CA002350206A patent/CA2350206A1/en not_active Abandoned
- 1999-10-25 KR KR1020017005902A patent/KR20010080404A/ko not_active Application Discontinuation
- 1999-10-25 JP JP2000581656A patent/JP2002529751A/ja active Pending
- 1999-11-06 TW TW088119436A patent/TW494087B/zh not_active IP Right Cessation
-
2001
- 2001-05-10 US US09/854,261 patent/US20010031232A1/en not_active Abandoned
Also Published As
Publication number | Publication date |
---|---|
CA2350206A1 (en) | 2000-05-18 |
US20010031232A1 (en) | 2001-10-18 |
KR20010080404A (ko) | 2001-08-22 |
JP2002529751A (ja) | 2002-09-10 |
WO2000028553A2 (de) | 2000-05-18 |
WO2000028553A3 (de) | 2000-08-17 |
EP1141975A2 (de) | 2001-10-10 |
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