JPH04501083A - Cross-flow moving bed reaction column for granular adsorbents with a rectangular cross section - Google Patents
Cross-flow moving bed reaction column for granular adsorbents with a rectangular cross sectionInfo
- Publication number
- JPH04501083A JPH04501083A JP1510994A JP51099489A JPH04501083A JP H04501083 A JPH04501083 A JP H04501083A JP 1510994 A JP1510994 A JP 1510994A JP 51099489 A JP51099489 A JP 51099489A JP H04501083 A JPH04501083 A JP H04501083A
- Authority
- JP
- Japan
- Prior art keywords
- cross
- moving bed
- reaction column
- flow
- adsorbent
- 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.)
- Pending
Links
- 238000006243 chemical reaction Methods 0.000 title claims description 32
- 239000003463 adsorbent Substances 0.000 title claims description 23
- 238000006477 desulfuration reaction Methods 0.000 claims 1
- 230000023556 desulfurization Effects 0.000 claims 1
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 5
- 239000003546 flue gas Substances 0.000 description 5
- 150000003863 ammonium salts Chemical class 0.000 description 4
- 239000000428 dust Substances 0.000 description 4
- 239000007789 gas Substances 0.000 description 4
- 239000002245 particle Substances 0.000 description 4
- 239000000463 material Substances 0.000 description 3
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 description 2
- RAHZWNYVWXNFOC-UHFFFAOYSA-N Sulphur dioxide Chemical compound O=S=O RAHZWNYVWXNFOC-UHFFFAOYSA-N 0.000 description 2
- 239000000853 adhesive Substances 0.000 description 2
- 230000001070 adhesive effect Effects 0.000 description 2
- 239000000443 aerosol Substances 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000006872 improvement Effects 0.000 description 2
- 230000009467 reduction Effects 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 229910021529 ammonia Inorganic materials 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 238000012856 packing Methods 0.000 description 1
- 238000005192 partition Methods 0.000 description 1
- 238000006748 scratching Methods 0.000 description 1
- 230000002393 scratching effect Effects 0.000 description 1
- 238000001179 sorption measurement Methods 0.000 description 1
Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B07—SEPARATING SOLIDS FROM SOLIDS; SORTING
- B07C—POSTAL SORTING; SORTING INDIVIDUAL ARTICLES, OR BULK MATERIAL FIT TO BE SORTED PIECE-MEAL, e.g. BY PICKING
- B07C5/00—Sorting according to a characteristic or feature of the articles or material being sorted, e.g. by control effected by devices which detect or measure such characteristic or feature; Sorting by manually actuated devices, e.g. switches
- B07C5/16—Sorting according to weight
- B07C5/22—Sorting according to weight using a plurality of stationary weighing mechanisms
-
- 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
- B01D53/02—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 adsorption, e.g. preparative gas chromatography
- B01D53/06—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 adsorption, e.g. preparative gas chromatography with moving adsorbents, e.g. rotating beds
- B01D53/08—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 adsorption, e.g. preparative gas chromatography with moving adsorbents, e.g. rotating beds according to the "moving bed" method
-
- 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
- B01D53/46—Removing components of defined structure
- B01D53/48—Sulfur compounds
- B01D53/50—Sulfur oxides
- B01D53/508—Sulfur oxides by treating the gases with solids
-
- 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
- B01J8/00—Chemical or physical processes in general, conducted in the presence of fluids and solid particles; Apparatus for such processes
- B01J8/08—Chemical or physical processes in general, conducted in the presence of fluids and solid particles; Apparatus for such processes with moving particles
- B01J8/12—Chemical or physical processes in general, conducted in the presence of fluids and solid particles; Apparatus for such processes with moving particles moved by gravity in a downward flow
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B07—SEPARATING SOLIDS FROM SOLIDS; SORTING
- B07C—POSTAL SORTING; SORTING INDIVIDUAL ARTICLES, OR BULK MATERIAL FIT TO BE SORTED PIECE-MEAL, e.g. BY PICKING
- B07C5/00—Sorting according to a characteristic or feature of the articles or material being sorted, e.g. by control effected by devices which detect or measure such characteristic or feature; Sorting by manually actuated devices, e.g. switches
- B07C5/16—Sorting according to weight
- B07C5/32—Sorting according to weight with associated check-weighing means
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2253/00—Adsorbents used in seperation treatment of gases and vapours
- B01D2253/10—Inorganic adsorbents
- B01D2253/102—Carbon
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2257/00—Components to be removed
- B01D2257/30—Sulfur compounds
- B01D2257/302—Sulfur oxides
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2257/00—Components to be removed
- B01D2257/40—Nitrogen compounds
- B01D2257/404—Nitrogen oxides other than dinitrogen oxide
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Analytical Chemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Health & Medical Sciences (AREA)
- Biomedical Technology (AREA)
- Environmental & Geological Engineering (AREA)
- Treating Waste Gases (AREA)
- Devices And Processes Conducted In The Presence Of Fluids And Solid Particles (AREA)
- Separation Of Gases By Adsorption (AREA)
Abstract
(57)【要約】本公報は電子出願前の出願データであるため要約のデータは記録されません。 (57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.
Description
【発明の詳細な説明】 方形横断面を持った、粒状吸着 開用の直交流形移動床式反応塔 び（または）脱窒素のためのものであり、この反応塔においては反応塔縦孔内の ガスの流入側および（または）流出側に吸着剤を導くだめの案内ルーバと前ルー バが設けられている。かかる移動床式反応塔は例えばＤＥ−ＡＳ １９４６４５ ７から公知である。[Detailed description of the invention] Granular adsorption with square cross section Open cross-flow moving bed reaction tower This is for denitrification, and in this reaction tower, the Guide louvers and front louvers for guiding the adsorbent to the gas inlet and/or outlet side. A bar is provided. Such a moving bed reaction column is, for example, DE-AS 194645 7.
更に前ルーバの代わりに案内ルーバの前方に多孔のエプロンを配置することがＤ Ｅ−Ｏ８３６３５５７１から知られている。Furthermore, it is possible to arrange a porous apron in front of the guide louver instead of the front louver. Known from E-O83635571.
ルーバおよび配属の前ルーバもしくは多孔のエプロンは反応塔縦孔内のガスの流 入側および（または）流出側におけるばら積換機構（物質の流れ）を改善する。The louvers and associated front louvers or perforated aprons control the flow of gas in the reactor vertical holes. Improve the bulk transfer mechanism (material flow) on the inlet and/or outlet side.
しかしルーバと側方の仕切９壁との間のコーナでは吸着剤の十分な交換が行われ ない仁とが示された。むしろ側壁の範囲でこげ付きが起り、これは下から上へと 徐々に反応塔の代表面積（Ａｎｓ ｔｒ６ｍ−ｆ １〜’、ｃｈｅｎ）の増大を もたらす。この範囲内で煙道ガスの流速が高められ、その結果吸着剤粒子が流出 側ルーバから運び出されることがある。However, sufficient exchange of adsorbent does not take place at the corner between the louver and the side partition 9 wall. It was shown that there was no Jin. Rather, scorching occurs in the side wall area, and this occurs from bottom to top. Gradually increase the representative area (Ans tr6m-f 1~', chen) of the reaction tower. bring. Within this range the flow velocity of the flue gas is increased, resulting in the escape of adsorbent particles. It may be carried out from the side louver.
こげ付きは煙道ガス中にダスト分が存在するために起り、ダストは吸着剤ばら覆 部の粒子間容積内に集ま＃）Ｘとｔらは互いに接着し、その上に側壁およびルー バへのこげ付きが起こる。別のエーロゾル例えばアンモニウム塩が加わると、こ げ付きは増大する。アンモニウム塩は二酸化−ｆオウの存在でＮＯｘ−還元時に 生じ、その吸湿特性はこげ向きと成長を強める。Burning occurs due to the presence of dust in the flue gas, and the dust is scattered when the adsorbent is covered. #) X and t adhere to each other in the interparticle volume of the Burning may occur. If another aerosol, e.g. an ammonium salt, is added, this Scratching increases. Ammonium salts are present during NOx reduction due to the presence of -f-dioxide. Its hygroscopic properties enhance the tendency to burn and growth.
本発明の課題はこのようなこげ付きを回避することである。An object of the present invention is to avoid such burning.
この課題は、冒頭に記載された移動床式反応塔において請求の範囲第１項に記載 された特電を有していることによって解決される。This problem is solved in the moving bed reaction tower mentioned at the beginning as set forth in claim 1. The problem is solved by having a special electric line.
その他の構成は従属項に記載されている。Other arrangements are described in the dependent claims.
反応塔縦孔の側壁の前方に横ルーバが配置され、かつこれが吸着剤の流れ方向で みて反応塔壁の方へ傾斜していることによって側壁の範囲において物質の流れが 強制され、この流れはこげ付きを生じることはなへ物質の流れの一層の改善は吸 着剤排出ロートのコーナ範囲に伺加的な排出縦孔が設けられていることによって 達成される。A horizontal louver is placed in front of the side wall of the reaction column vertical hole, and this is in the flow direction of the adsorbent. The inclination toward the reaction column wall results in a flow of material in the area of the side wall. This flow is forced and does not cause scorching. Further improvement of material flow is due to absorption. By providing an additional vertical discharge hole in the corner area of the adhesive discharge funnel, achieved.
本発明を以下図面を参照しながら実施例について詳説する、。The present invention will be described in detail below with reference to embodiments with reference to the drawings.
第１図は側部にこげ付きの生じる、従来技術による直交流形移動床式反応塔の流 入方向からみた図、第２図は側壁に平行に配置された本発明による横ルーバを備 えた、第１図による移動床式反応塔のＡで示された部分の図、第６図は第２図に 示された反応塔部分の部分断面図、第４図は第２図に示された反応塔部分を一部 断面して示した平面図、第５図、第６図、第７図はそれぞれ横ルーバの別の実施 例の第２図、第ろ図、第４図に相当する図、第８図は複数の排出縦孔を備えた吸 着剤のだめの排出ロートを示し５た図である。Figure 1 shows the flow of a cross-flow type moving bed reactor using conventional technology with scorching on the sides. FIG. 2, a view from the entrance direction, shows a device equipped with a horizontal louver according to the present invention arranged parallel to the side wall. Figure 6 is a diagram of the part indicated by A of the moving bed reaction tower according to Figure 1, which is shown in Figure 2. A partial sectional view of the reaction column shown in FIG. 4 is a partial cross-sectional view of the reaction column shown in FIG. The cross-sectional plan view, FIG. 5, FIG. 6, and FIG. 7 each show different implementations of the horizontal louver. Figures 2, 4, and 8 of the examples show a suction pipe with a plurality of vertical discharge holes. FIG. 5 is a diagram showing the discharge funnel of the adhesive reservoir.
従来技術を示した第１図には反応塔縦孔１１の下刃範囲が示されておシ、反応塔 縦孔は流入側に案内ルーバ２を備え、案内ルーバは側壁１と１８との間に配置さ れている。案内ルーバ２には前ルーバ３（第３図）が配属されているが、前ルー バは第１図では見えない。FIG. 1, which shows the prior art, shows the lower blade range of the reaction tower vertical hole 11. The vertical hole is provided with a guide louver 2 on the inflow side, and the guide louver is arranged between the side walls 1 and 18. It is. A front louver 3 (Fig. 3) is attached to the guide louver 2. The bar is not visible in Figure 1.
同様にして反応塔縦孔１１の流出側も見えないが、流出側も同様にして案内ルー バ２と前ルーバ３を備えている。Similarly, the outflow side of the reaction tower vertical hole 11 cannot be seen, but the outflow side is also covered with a guide hole. It has a front louver 2 and a front louver 3.
反応塔縦孔１１には図示されていないが吸着剤粒子から成る充填物が充填されて おり、これは反応塔縦孔１１を移動層として重力の作用下に丘から下へ移動する 。排ガス、例えば煙道ガスは反応塔縦孔１１およびこの内部に存在する移動層を 横断する方向に、すなわち矢印７（流入側）および矢印７１（流出側）によって 示される方向に貫流する（第４図、第７図）。第１図の反応塔縦孔１１の下方範 囲に示されているように側壁１，１ａの前方にこげ付きが形成されており、こげ 付き部分は例えば破線１２．１３で示された所まで達している。こルらのこげ付 きは、吸着剤流が壁範囲内で邪魔されることにより起る。こげ付き物は煙道ガス から分離したダスト分および（または）他のエーロゾル、例えばアンモニウム塩 から成っており、アンモニウム塩は炭素含勺吸着剤において二酸化イオウの存在 でアンモニアによりＮＯｘ−還元が起った際に生じ、吸湿性である。反応塔縦孔 １１のこの一部成長した部分においては狭く４つた流過横断面内で煙道ガスの流 速が高まり、その結果吸着剤粒子がルーバ２，３を通過して流出側へ運び出され るおそれがある。Although not shown, the reaction column vertical hole 11 is filled with a packing made of adsorbent particles. This moves downward from the hill under the action of gravity using the reaction column vertical hole 11 as a moving bed. . Exhaust gas, e.g. flue gas, passes through the reaction column vertical hole 11 and the moving bed present inside it. in the transverse direction, i.e. by arrow 7 (inflow side) and arrow 71 (outflow side) The flow flows through in the direction shown (Fig. 4, Fig. 7). The lower range of the reaction column vertical hole 11 in FIG. As shown in the box, burnt spots are formed in front of the side walls 1 and 1a. The marked portion reaches, for example, the point indicated by the broken line 12.13. With burnt parts This occurs because the adsorbent flow is obstructed in the wall area. Burnt parts are flue gas dust fractions and/or other aerosols separated from The ammonium salt is composed of sulfur dioxide in the carbon-containing adsorbent. It is produced when NOx reduction occurs with ammonia and is hygroscopic. Reaction tower vertical hole In this partially grown part of 11, the flue gas flows within four narrow flow cross sections. The speed increases, and as a result, the adsorbent particles pass through the louvers 2 and 3 and are carried out to the outflow side. There is a risk of
第２図から第４図には本発明による反応塔縦孔の実施例が示されており、ここで は上記の欠点は克服されている。反応塔縦孔１１の側壁１と１δの前には横ルー バ４，５，６，４Ｌ ５ｉ、６１が吸着剤の流れ方向でみて反応塔壁１，１ａに 対して斜めに配置されていて、しかも案内ルーバ２もし７くは前ルーツζ３に固 定されている（第６図）。横ルーバ４，５，６，４１゜５１．６１は、移動層の 吸着剤粒子が反応塔壁１，１ａの範囲においても運動するように働き、その結果 このようにしてこげ付きは効果的に阻止される。FIGS. 2 to 4 show examples of the reaction column vertical holes according to the invention, in which The above drawbacks have been overcome. In front of the side walls 1 and 1δ of the reaction column vertical hole 11, there is a horizontal route. Bars 4, 5, 6, 4L 5i, 61 are attached to the reaction tower walls 1, 1a when viewed in the flow direction of the adsorbent. It is arranged diagonally to the guide louver 2 or 7 or is fixed to the front root ζ3. (Figure 6). The horizontal louvers 4, 5, 6, 41°51.61 are for the moving layer. The adsorbent particles move even within the reaction tower walls 1 and 1a, and as a result, In this way scorching is effectively prevented.
第５図、第６図、第７図に示されているように本発明による別の実施例によれば 横ルーツ（８，９，１０゜８１．９Ｌ １０１は案内ルーツく２および前ルー／ （３の範囲内にのみ設けられている、それというのもこげ付きは大ていの場合側 壁１，１ａと案内ルー／（２もしくは前ルーバ３によって形成された縦孔１１の コーナ部から成長していくからである。According to another embodiment of the invention, as shown in FIGS. 5, 6 and 7, Side roots (8, 9, 10° 81.9L 101 is the guide root 2 and front root / (It is only provided within the range of 3, because the burnt part is mostly on the side. The vertical hole 11 formed by the walls 1, 1a and the guide louver/(2 or the front louver 3) This is because it grows from the corner.
第２図もしくは第５図から判るように、横ルーバ４゜５．６，４１，５１，６１ ；８，９，１０；８１゜９１．１０１は吸着剤の流れ方向でみて側壁１，１ａか らの距離が徐々に増大している。横ルーバ４，５゜６．４１，５１，６１ ；８ ，９，１０；８１，９１゜１０１はガス透過性の、または密閉状の薄板から成る 成形部材から製作することができる。As can be seen from Figure 2 or Figure 5, the horizontal louvers 4゜5.6, 41, 51, 61 ;8,9,10;81゜91.101 is the side wall 1, 1a when viewed in the flow direction of the adsorbent. The distance between them is gradually increasing. Horizontal louver 4,5゜6.41,51,61 ;8 ,9,10;81,91゜101 consists of a gas-permeable or sealed thin plate It can be manufactured from molded parts.
横ルーバの使用により次の利点が得られる：側壁１，１ａが吸着剤のばら積圧力 による負荷を軽減され、これによシこの範囲内の吸着剤の流れは容易になる。The use of transverse louvers provides the following advantages: side walls 1, 1a absorb the bulk pressure of the adsorbent; This eases the flow of the adsorbent within this range.
一様な吸着剤流によシダストおよびアンモニウム塩が一緒に流れ、かつ排出され ることも保証される。Uniform adsorbent flow allows dust and ammonium salts to flow together and be expelled. It is also guaranteed that
ガス流におけるこげ付きによる圧力損失が回避される。Pressure losses due to scorching in the gas flow are avoided.
横ルーバ４，５，６，４１，５１，６１；８，９゜１０；８Ｌ ９Ｌ １０１に よって受止められる水平方向の力はほんの僅かにすぎないので既存のルーバ２゜ ３への固定で十分である。Horizontal louver 4, 5, 6, 41, 51, 61; 8, 9° 10; 8L 9L 101 Therefore, the horizontal force that can be received is only a small amount, so the existing louver 2° Fixing to 3 is sufficient.
反応塔縦孔１１のコーナ部における吸着剤の流れの改善は、排出０−１−１４の 範囲に中央の排出縦孔１５の他にコーナ部に更に４つの排出縦孔１６． １７． １８゜１９を設けることによシ達成することができる。The improvement of the adsorbent flow at the corner of the reaction column vertical hole 11 is due to the In addition to the central discharge hole 15 in the area, there are four further discharge holes 16 at the corners. 17. This can be achieved by providing an angle of 18°19.
ＦＩＧ、 １ Ｆｌ（３，３Ｆｌ６．２ ＦＩＧ、４ ＦＩＧ、７ ＦＩＧ、６ Ｆｌ［３，５ ＦＩＧ、８ 国際調査報告FIG. 1 Fl(3,3Fl6.2 FIG.4 FIG.7 FIG, 6 Fl[3,5 FIG.8 international search report
Claims (1)
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE19883835550 DE3835550C1 (en) | 1988-10-19 | 1988-10-19 | |
| DE3835550.7 | 1988-10-19 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH04501083A true JPH04501083A (en) | 1992-02-27 |
Family
ID=6365430
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1510994A Pending JPH04501083A (en) | 1988-10-19 | 1989-10-17 | Cross-flow moving bed reaction column for granular adsorbents with a rectangular cross section |
Country Status (4)
| Country | Link |
|---|---|
| EP (1) | EP0439500A1 (en) |
| JP (1) | JPH04501083A (en) |
| DE (1) | DE3835550C1 (en) |
| WO (1) | WO1990004447A1 (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE4040246A1 (en) * | 1990-02-20 | 1991-08-22 | Avt Anlagen Verfahrenstech | Descending bed reactor for treating combustion fumes - has conical base section of overlapping slats through which fumes pass into reactor to give no dead zones |
| CN111773915B (en) * | 2020-06-10 | 2022-07-15 | 上海交通大学 | Flue gas dry desulfurization process |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE1946457C2 (en) * | 1969-09-13 | 1975-10-09 | Davy Powergas Gmbh, 5000 Koeln | Adsorption apparatus |
| DE3635571A1 (en) * | 1986-10-20 | 1988-04-28 | Krantz H Gmbh & Co | DEVICE FOR RECEIVING GIANT CAPACITY |
| JP2646935B2 (en) * | 1992-05-20 | 1997-08-27 | 新神戸電機株式会社 | Glass woven fabric for laminates and laminates |
-
1988
- 1988-10-19 DE DE19883835550 patent/DE3835550C1/de not_active Expired - Fee Related
-
1989
- 1989-10-17 EP EP19890911808 patent/EP0439500A1/en not_active Withdrawn
- 1989-10-17 JP JP1510994A patent/JPH04501083A/en active Pending
- 1989-10-17 WO PCT/EP1989/001232 patent/WO1990004447A1/en not_active Ceased
Also Published As
| Publication number | Publication date |
|---|---|
| DE3835550C1 (en) | 1990-02-22 |
| EP0439500A1 (en) | 1991-08-07 |
| WO1990004447A1 (en) | 1990-05-03 |
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