DE2216342A1 - Verfahren und Vorrichtung zum Trennen einer schlammigen Flüssigkeit in ihre festen und wässrigen Bestandteile - Google Patents
Verfahren und Vorrichtung zum Trennen einer schlammigen Flüssigkeit in ihre festen und wässrigen BestandteileInfo
- Publication number
- DE2216342A1 DE2216342A1 DE19722216342 DE2216342A DE2216342A1 DE 2216342 A1 DE2216342 A1 DE 2216342A1 DE 19722216342 DE19722216342 DE 19722216342 DE 2216342 A DE2216342 A DE 2216342A DE 2216342 A1 DE2216342 A1 DE 2216342A1
- Authority
- DE
- Germany
- Prior art keywords
- covering
- liquid
- porous
- drum
- filter
- 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
- 239000007788 liquid Substances 0.000 title claims description 40
- 239000007787 solid Substances 0.000 title claims description 39
- 238000000034 method Methods 0.000 title claims description 18
- 239000006260 foam Substances 0.000 claims description 23
- 238000012546 transfer Methods 0.000 claims description 13
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 13
- 229920002554 vinyl polymer Polymers 0.000 claims description 8
- 238000005406 washing Methods 0.000 claims description 8
- 238000003809 water extraction Methods 0.000 claims description 8
- DHKHKXVYLBGOIT-UHFFFAOYSA-N acetaldehyde Diethyl Acetal Natural products CCOC(C)OCC DHKHKXVYLBGOIT-UHFFFAOYSA-N 0.000 claims description 7
- 229910052751 metal Inorganic materials 0.000 claims description 7
- 239000002184 metal Substances 0.000 claims description 7
- 239000011148 porous material Substances 0.000 claims description 7
- 230000002093 peripheral effect Effects 0.000 claims description 5
- 238000010521 absorption reaction Methods 0.000 claims description 4
- 239000011248 coating agent Substances 0.000 claims description 4
- 238000000576 coating method Methods 0.000 claims description 4
- 239000000835 fiber Substances 0.000 claims description 4
- 239000004744 fabric Substances 0.000 claims description 3
- 239000004745 nonwoven fabric Substances 0.000 claims description 3
- 230000002787 reinforcement Effects 0.000 claims description 3
- 238000003860 storage Methods 0.000 claims description 3
- 238000011144 upstream manufacturing Methods 0.000 claims description 3
- 239000002759 woven fabric Substances 0.000 claims description 3
- 241000607479 Yersinia pestis Species 0.000 claims description 2
- 238000011084 recovery Methods 0.000 claims description 2
- 125000002777 acetyl group Chemical class [H]C([H])([H])C(*)=O 0.000 claims 1
- 239000010802 sludge Substances 0.000 description 18
- 150000001241 acetals Chemical class 0.000 description 6
- 239000000463 material Substances 0.000 description 6
- 230000000694 effects Effects 0.000 description 5
- 239000000203 mixture Substances 0.000 description 4
- 239000002245 particle Substances 0.000 description 4
- 230000000704 physical effect Effects 0.000 description 4
- 229920003002 synthetic resin Polymers 0.000 description 4
- 239000000057 synthetic resin Substances 0.000 description 4
- 229910021578 Iron(III) chloride Inorganic materials 0.000 description 3
- 239000000701 coagulant Substances 0.000 description 3
- 238000010438 heat treatment Methods 0.000 description 3
- RBTARNINKXHZNM-UHFFFAOYSA-K iron trichloride Chemical compound Cl[Fe](Cl)Cl RBTARNINKXHZNM-UHFFFAOYSA-K 0.000 description 3
- 230000033001 locomotion Effects 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 229920000915 polyvinyl chloride Polymers 0.000 description 3
- 239000004800 polyvinyl chloride Substances 0.000 description 3
- 239000010865 sewage Substances 0.000 description 3
- 241000196324 Embryophyta Species 0.000 description 2
- PPBRXRYQALVLMV-UHFFFAOYSA-N Styrene Chemical compound C=CC1=CC=CC=C1 PPBRXRYQALVLMV-UHFFFAOYSA-N 0.000 description 2
- 229910052782 aluminium Inorganic materials 0.000 description 2
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 2
- 229920006318 anionic polymer Polymers 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
- 210000003608 fece Anatomy 0.000 description 2
- 238000001914 filtration Methods 0.000 description 2
- 235000013305 food Nutrition 0.000 description 2
- 230000005484 gravity Effects 0.000 description 2
- 239000004615 ingredient Substances 0.000 description 2
- 238000000926 separation method Methods 0.000 description 2
- 239000002351 wastewater Substances 0.000 description 2
- SUDBRAWXUGTELR-HPFNVAMJSA-N 5-[[(2r,3r,4s,5s,6r)-3,4,5-trihydroxy-6-(hydroxymethyl)oxan-2-yl]oxymethyl]-1h-pyrimidine-2,4-dione Chemical compound O[C@@H]1[C@@H](O)[C@H](O)[C@@H](CO)O[C@H]1OCC1=CNC(=O)NC1=O SUDBRAWXUGTELR-HPFNVAMJSA-N 0.000 description 1
- 241000251468 Actinopterygii Species 0.000 description 1
- 241000894006 Bacteria Species 0.000 description 1
- VEXZGXHMUGYJMC-UHFFFAOYSA-M Chloride anion Chemical compound [Cl-] VEXZGXHMUGYJMC-UHFFFAOYSA-M 0.000 description 1
- 229920002261 Corn starch Polymers 0.000 description 1
- 229920000742 Cotton Polymers 0.000 description 1
- 229920001353 Dextrin Polymers 0.000 description 1
- 239000004375 Dextrin Substances 0.000 description 1
- 244000043261 Hevea brasiliensis Species 0.000 description 1
- 235000019687 Lamb Nutrition 0.000 description 1
- 239000004372 Polyvinyl alcohol Substances 0.000 description 1
- KWYUFKZDYYNOTN-UHFFFAOYSA-M Potassium hydroxide Chemical compound [OH-].[K+] KWYUFKZDYYNOTN-UHFFFAOYSA-M 0.000 description 1
- 240000004808 Saccharomyces cerevisiae Species 0.000 description 1
- 229920002472 Starch Polymers 0.000 description 1
- 230000002378 acidificating effect Effects 0.000 description 1
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- WNROFYMDJYEPJX-UHFFFAOYSA-K aluminium hydroxide Chemical compound [OH-].[OH-].[OH-].[Al+3] WNROFYMDJYEPJX-UHFFFAOYSA-K 0.000 description 1
- 239000003242 anti bacterial agent Substances 0.000 description 1
- 229940088710 antibiotic agent Drugs 0.000 description 1
- 230000001580 bacterial effect Effects 0.000 description 1
- 239000011324 bead Substances 0.000 description 1
- 239000003054 catalyst Substances 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- VQWFNAGFNGABOH-UHFFFAOYSA-K chromium(iii) hydroxide Chemical compound [OH-].[OH-].[OH-].[Cr+3] VQWFNAGFNGABOH-UHFFFAOYSA-K 0.000 description 1
- 230000001427 coherent effect Effects 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 239000008120 corn starch Substances 0.000 description 1
- 229940099112 cornstarch Drugs 0.000 description 1
- 235000019425 dextrin Nutrition 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 229920001971 elastomer Polymers 0.000 description 1
- 238000000855 fermentation Methods 0.000 description 1
- 230000004151 fermentation Effects 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 125000002485 formyl group Chemical class [H]C(*)=O 0.000 description 1
- 230000012447 hatching Effects 0.000 description 1
- 238000007373 indentation Methods 0.000 description 1
- 230000006698 induction Effects 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000005065 mining Methods 0.000 description 1
- 229920003052 natural elastomer Polymers 0.000 description 1
- 229920001194 natural rubber Polymers 0.000 description 1
- 229910001562 pearlite Inorganic materials 0.000 description 1
- 239000010451 perlite Substances 0.000 description 1
- 235000019362 perlite Nutrition 0.000 description 1
- 239000000575 pesticide Substances 0.000 description 1
- 229920002635 polyurethane Polymers 0.000 description 1
- 239000004814 polyurethane Substances 0.000 description 1
- 229920002451 polyvinyl alcohol Polymers 0.000 description 1
- 229940072033 potash Drugs 0.000 description 1
- BWHMMNNQKKPAPP-UHFFFAOYSA-L potassium carbonate Substances [K+].[K+].[O-]C([O-])=O BWHMMNNQKKPAPP-UHFFFAOYSA-L 0.000 description 1
- 235000015320 potassium carbonate Nutrition 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 239000005060 rubber Substances 0.000 description 1
- 239000004576 sand Substances 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
- 235000019698 starch Nutrition 0.000 description 1
- 239000008107 starch Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 230000008961 swelling Effects 0.000 description 1
- 229920003051 synthetic elastomer Polymers 0.000 description 1
- 239000012209 synthetic fiber Substances 0.000 description 1
- 229920002994 synthetic fiber Polymers 0.000 description 1
- 239000005061 synthetic rubber Substances 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- 238000009736 wetting Methods 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C13—SUGAR INDUSTRY
- C13B—PRODUCTION OF SUCROSE; APPARATUS SPECIALLY ADAPTED THEREFOR
- C13B20/00—Purification of sugar juices
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D33/00—Filters with filtering elements which move during the filtering operation
- B01D33/04—Filters with filtering elements which move during the filtering operation with filtering bands or the like supported on cylinders which are impervious for filtering
- B01D33/042—Filters with filtering elements which move during the filtering operation with filtering bands or the like supported on cylinders which are impervious for filtering whereby the filtration and squeezing-out take place between at least two filtering bands
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D33/00—Filters with filtering elements which move during the filtering operation
- B01D33/044—Filters with filtering elements which move during the filtering operation with filtering bands or the like supported on cylinders which are pervious for filtering
- B01D33/048—Filters with filtering elements which move during the filtering operation with filtering bands or the like supported on cylinders which are pervious for filtering with endless filtering bands
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D33/00—Filters with filtering elements which move during the filtering operation
- B01D33/06—Filters with filtering elements which move during the filtering operation with rotary cylindrical filtering surfaces, e.g. hollow drums
- B01D33/073—Filters with filtering elements which move during the filtering operation with rotary cylindrical filtering surfaces, e.g. hollow drums arranged for inward flow filtration
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D33/00—Filters with filtering elements which move during the filtering operation
- B01D33/44—Regenerating the filter material in the filter
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D33/00—Filters with filtering elements which move during the filtering operation
- B01D33/44—Regenerating the filter material in the filter
- B01D33/46—Regenerating the filter material in the filter by scrapers, brushes nozzles or the like acting on the cake-side of the filtering element
- B01D33/461—Regenerating the filter material in the filter by scrapers, brushes nozzles or the like acting on the cake-side of the filtering element brushes
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D33/00—Filters with filtering elements which move during the filtering operation
- B01D33/44—Regenerating the filter material in the filter
- B01D33/46—Regenerating the filter material in the filter by scrapers, brushes nozzles or the like acting on the cake-side of the filtering element
- B01D33/465—Regenerating the filter material in the filter by scrapers, brushes nozzles or the like acting on the cake-side of the filtering element take-off rollers
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D33/00—Filters with filtering elements which move during the filtering operation
- B01D33/44—Regenerating the filter material in the filter
- B01D33/48—Regenerating the filter material in the filter by flushing, e.g. counter-current air-bumps
- B01D33/50—Regenerating the filter material in the filter by flushing, e.g. counter-current air-bumps with backwash arms, shoes or nozzles
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D33/00—Filters with filtering elements which move during the filtering operation
- B01D33/58—Handling the filter cake in the filter for purposes other than for regenerating the filter cake remaining on the filtering element
- B01D33/60—Handling the filter cake in the filter for purposes other than for regenerating the filter cake remaining on the filtering element for washing
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D33/00—Filters with filtering elements which move during the filtering operation
- B01D33/58—Handling the filter cake in the filter for purposes other than for regenerating the filter cake remaining on the filtering element
- B01D33/62—Handling the filter cake in the filter for purposes other than for regenerating the filter cake remaining on the filtering element for drying
- B01D33/64—Handling the filter cake in the filter for purposes other than for regenerating the filter cake remaining on the filtering element for drying by compression
- B01D33/646—Handling the filter cake in the filter for purposes other than for regenerating the filter cake remaining on the filtering element for drying by compression by pressure rollers
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D33/00—Filters with filtering elements which move during the filtering operation
- B01D33/80—Accessories
- B01D33/801—Driving means, shaft packing systems or the like
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D37/00—Processes of filtration
- B01D37/02—Precoating the filter medium; Addition of filter aids to the liquid being filtered
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D39/00—Filtering material for liquid or gaseous fluids
- B01D39/14—Other self-supporting filtering material ; Other filtering material
- B01D39/16—Other self-supporting filtering material ; Other filtering material of organic material, e.g. synthetic fibres
- B01D39/1669—Cellular material
- B01D39/1676—Cellular material of synthetic origin
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2201/00—Details relating to filtering apparatus
- B01D2201/38—Preventing rewetting of the filter cake on the filter media
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2239/00—Aspects relating to filtering material for liquid or gaseous fluids
- B01D2239/10—Filtering material manufacturing
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Life Sciences & Earth Sciences (AREA)
- Biochemistry (AREA)
- Organic Chemistry (AREA)
- Filtration Of Liquid (AREA)
- Treatment Of Sludge (AREA)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3241271 | 1971-05-17 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| DE2216342A1 true DE2216342A1 (de) | 1972-11-30 |
Family
ID=12358222
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| DE19722216342 Pending DE2216342A1 (de) | 1971-05-17 | 1972-04-05 | Verfahren und Vorrichtung zum Trennen einer schlammigen Flüssigkeit in ihre festen und wässrigen Bestandteile |
Country Status (7)
| Country | Link |
|---|---|
| US (1) | US3741388A (enExample) |
| AU (1) | AU438433B2 (enExample) |
| DE (1) | DE2216342A1 (enExample) |
| FR (1) | FR2137430B1 (enExample) |
| GB (1) | GB1342756A (enExample) |
| IT (1) | IT968189B (enExample) |
| NL (1) | NL7110689A (enExample) |
Families Citing this family (25)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3984463A (en) * | 1974-02-25 | 1976-10-05 | Shell Oil Company | Herbicidal 2-phenyl semicarbazides |
| GB1510857A (en) * | 1974-09-13 | 1978-05-17 | Kernforschungsanlage Juelich | Method of separating particles of nuclear fuel ans/or breeder material from a first liquid and introducing them into a second liquid |
| US3960732A (en) * | 1974-11-01 | 1976-06-01 | The United States Of America As Represented By The Administrator Of The Environmental Protection Agency | System for dewatering dilute slurries |
| DK40776A (da) * | 1976-01-30 | 1977-07-31 | Kobenhavns Pektinfabrik As | Apparat til fraskillelse af veske fra en opslemning af fast stof i vesken |
| GB1576819A (en) * | 1976-12-08 | 1980-10-15 | V H Pannevis & Zn Bv Maschf | Method and device for removing a liquid for a mixture of liquid and solid substances |
| JPS5489372A (en) * | 1977-12-27 | 1979-07-16 | Samurou Yamamoto | Pressurizing filter pressing method and its device |
| CH644414A5 (de) * | 1980-02-06 | 1984-07-31 | Escher Wyss Gmbh | Siebmaschine, insbesondere zur behandlung von aus altpapier gewonnenen waesserigen faserstoffsuspensionen. |
| US4686005B1 (en) * | 1980-02-06 | 1995-10-17 | Escher Wyss Gmbh | Method of washing stock suspensions by removing undesired material through an endless revolving wire |
| DE3041508C1 (de) * | 1980-11-04 | 1982-07-08 | Salzgitter Maschinen Und Anlagen Ag, 3320 Salzgitter | Verfahren zur Herstellung von Zuckerruebenschnitzeln hohen Trockensubstanzgehalts |
| IN160903B (enExample) * | 1983-05-24 | 1987-08-15 | Dorr Oliver Inc | |
| GB2162080B (en) * | 1984-07-26 | 1988-01-06 | Champion Int Corp | Filtering |
| SE9000650L (sv) * | 1989-02-28 | 1990-08-29 | Asahi Optical Co Ltd | Separation av celler eller virus |
| US5426864A (en) * | 1994-02-17 | 1995-06-27 | Svehaug; Henry V. | Vacuum belt press dryer |
| US5462425A (en) * | 1994-07-11 | 1995-10-31 | Kuss; Thomas | Apparatus for demoisturizing coal |
| FR2725379B1 (fr) * | 1994-10-05 | 1996-12-27 | Denitral Sa | Installation de filtration d'un liquide ou d'un gaz contenant des matieres en suspension et son procede de mise en oeuvre |
| CA2352414A1 (fr) * | 2001-07-05 | 2003-01-05 | Industries Fournier Inc. | Dispositif de controle et de retenue des gateaux dans un pressoir rotatif |
| US6714713B2 (en) * | 2002-03-15 | 2004-03-30 | Corning Cable Systems Llc | Optical fiber having a low-shrink buffer layer and methods of manufacturing the same |
| US7347933B2 (en) * | 2003-11-17 | 2008-03-25 | Intake Screens, Inc. | Self-cleaning intake screen |
| US7799967B2 (en) * | 2004-04-08 | 2010-09-21 | Kimberly-Clark Worldwide, Inc. | Differentially expanding absorbent structure |
| BRPI0514226A (pt) | 2004-08-09 | 2008-06-03 | Prime Solution Inc | conjunto extrator de lìquido para extrair lìquido de uma massa, método de lavar um conjunto extrator de lìquido para extrair lìquido de uma massa, e, sistema para extrair lìquido de uma massa |
| US20070090041A1 (en) * | 2005-10-25 | 2007-04-26 | Berry Russell M Iii | Self-cleaning intake screen |
| WO2007050082A1 (en) * | 2005-10-28 | 2007-05-03 | Prime Solution, Inc. | Rotary fan press |
| US8662315B2 (en) * | 2008-07-14 | 2014-03-04 | Prime Solution, Inc. | Rotary fan press |
| US20110297617A1 (en) * | 2010-06-03 | 2011-12-08 | Baker Hughes Incorporated | Separator and method |
| CN103691197B (zh) * | 2013-12-13 | 2015-05-20 | 山西益尔利环保设备工程技术有限公司 | 具有压滤功能的真空过滤机 |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US915436A (en) * | 1909-03-16 | Heinrich Hencke | Vacuum drum-filter for separating solid substances from liquids. | |
| US2278526A (en) * | 1939-04-17 | 1942-04-07 | Improved Paper Machinery Corp | Method of and apparatus for couching |
| US2860973A (en) * | 1956-12-31 | 1958-11-18 | Diamond Gardner Corp | Pulp stock thickener |
-
1971
- 1971-08-03 NL NL7110689A patent/NL7110689A/xx unknown
- 1971-08-05 US US00169330A patent/US3741388A/en not_active Expired - Lifetime
- 1971-08-10 GB GB3755471A patent/GB1342756A/en not_active Expired
- 1971-09-07 AU AU33147/71A patent/AU438433B2/en not_active Expired
- 1971-11-30 FR FR717143777A patent/FR2137430B1/fr not_active Expired
-
1972
- 1972-01-18 IT IT19476/72A patent/IT968189B/it active
- 1972-04-05 DE DE19722216342 patent/DE2216342A1/de active Pending
Also Published As
| Publication number | Publication date |
|---|---|
| GB1342756A (en) | 1974-01-03 |
| AU3314771A (en) | 1973-03-15 |
| FR2137430A1 (enExample) | 1972-12-29 |
| US3741388A (en) | 1973-06-26 |
| AU438433B2 (en) | 1973-07-25 |
| FR2137430B1 (enExample) | 1973-06-29 |
| NL7110689A (enExample) | 1972-11-21 |
| IT968189B (it) | 1974-03-20 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| OHN | Withdrawal |