DK141961B - Process for chemical wastewater treatment and plant for carrying out the process. - Google Patents
Process for chemical wastewater treatment and plant for carrying out the process. Download PDFInfo
- Publication number
- DK141961B DK141961B DK30572AA DK30572A DK141961B DK 141961 B DK141961 B DK 141961B DK 30572A A DK30572A A DK 30572AA DK 30572 A DK30572 A DK 30572A DK 141961 B DK141961 B DK 141961B
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- DK
- Denmark
- Prior art keywords
- zone
- mixing
- sludge
- sedimentation
- wastewater
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Classifications
-
- 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
- C02F1/52—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities
- C02F1/5281—Installations for water purification using chemical agents
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D21/00—Separation of suspended solid particles from liquids by sedimentation
- B01D21/0018—Separation of suspended solid particles from liquids by sedimentation provided with a pump mounted in or on a settling tank
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D21/00—Separation of suspended solid particles from liquids by sedimentation
- B01D21/02—Settling tanks with single outlets for the separated liquid
- B01D21/08—Settling tanks with single outlets for the separated liquid provided with flocculating compartments
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- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Organic Chemistry (AREA)
- Separation Of Suspended Particles By Flocculating Agents (AREA)
- Removal Of Specific Substances (AREA)
Description
(φ \Β· OD FREMLÆ66ELSESSKRIFT 1 k 1 96 1 DANMARK <">intoi.= c 02 f i/oo «(21) Ansøgning nr. 505/72 (22) Indleveret den 21. Jan. 1972 (23) Løbedag 21. Jan. 1972 (44) Ansøgningen fremlagt og fremlæggelsesakrtftet offentliggjort den 28 · Jul. 1 980(φ \ Β · OD PROMOTIONAL WRITING 1 k 1 96 1 DENMARK <"> intoi. = c 02 fi / oo" (21) Application No. 505/72 (22) Filed on 21 Jan 1972 (23) Running day 21. Jan. 1972 (44) The application presented and the act of disclosure published on 28 · Jul. 1 980
Dl REKTORATET FORDl THE RECTORATE FOR
PATENT-OG VAREMÆRKEVÆSENET (30) Prioritet begamt fra denPATENT AND TRADEMARKET SYSTEM (30) Priority borne by it
21. Jan. 1971, 875/71, CHJan. 21 1971, 875/71, CH
(71) NORM A.M.C. AKTIENGESELLSCEAFT, Villa Seeburg, 6574 Buoche, CH.(71) NORM A.M.C. SHAREHOLDERS, Villa Seeburg, 6574 Buoche, CH.
(72) Opfinder: Klans Tofaute, Hofurlistrasse, 6575 Ennetbuergen, CH.(72) Inventor: Klans Tofaute, Hofurlistrasse, 6575 Ennetbuergen, CH.
(74) Fuldmægtig under sagens behancMng:(74) Clerk of the case:
Patentagentfirmaet Magnus Jensens Eftf.Patent law firm Magnus Jensens Eftf.
(64) Fremgangsmåde til kemisk spildevandsrensning og anlæg til udøvel« se af fremgangsmåden.(64) Chemical wastewater treatment and effluent treatment process' see the procedure.
Den foreliggende opfindelse angår en fremgangsmåde til kemisk spildevandsrensning, iser til kemisk udfældning af fosfater og til udførelse af andre fældningsprocesser, hvor spildevandet blandes med et kemisk fældningsmiddel i en blandezone øverst i et kar og derfra ledes videre ned gennem en fældningssone, og hvor det klarede vand ledes opad til en klarvandszone.The present invention relates to a process for chemical wastewater treatment, ice for the chemical precipitation of phosphates and for carrying out other precipitation processes in which the wastewater is mixed with a chemical precipitant in a mixing zone at the top of a vessel and then passed down through a precipitation zone and the clarified water is directed upwards to a clear water zone.
Fra GB-PS 1.128.768 kendes et anlæg til kemisk rensning af spildevand ved fældning, hvilket anlæg omfatter en beholder med en central blandezone og en denne zone omgivende ydre sedimentations-zone.GB-PS 1,128,768 discloses a plant for the chemical purification of waste water by precipitation, which comprises a container with a central mixing zone and an outer sedimentation zone surrounding this zone.
I dette kendte anlæg må der ikke forekomme turbulens i blandezonen, da de fældede partikler (fnug) da som følge af den intensive blanding vil blive for små til effektivt at kunne afsendes U1961 2 eller udskilles i sedimentationszonen. Tværtimod vil partiklerne i så tilfælde i stort omfang følge med det klarede vand op over spærrepladen og ud gennem udløbet, hvilket naturligvis ikke er tilsigtet. Det i sedimentationszonen ved beholderbunden afsatte slam bliver ved hjælp af et skraberinstrument med arme befordret til en sump, og derfra suges det bort gennem en rørledning.In this known plant, turbulence must not occur in the mixing zone, as the precipitated particles (fluff) will then, due to the intensive mixing, become too small to be effectively dispatched U1961 2 or separated into the sedimentation zone. On the contrary, in such cases the particles will largely follow the clear water up the barrier plate and out through the outlet, which is obviously not intended. The sludge deposited in the sedimentation zone at the bottom of the container is conveyed to a sump by means of a scraper instrument, and from there it is sucked away through a pipeline.
Anlægget muliggør ikke en intensiv blanding af spildevandet og det til spildevandet tilsatte kemiske fældningsmiddel, eksempelvis ved en turbulensvirkning i blandezonen. Tværtimod må blandingen ske yderst varsomt med et i lodret retning frem og tilbagebevæget rørlegeme af hensyn til dannelsen af så store partikler som muligt.The plant does not allow an intensive mixing of the wastewater and the chemical precipitant added to the wastewater, for example by a turbulence effect in the mixing zone. On the contrary, the mixing must be extremely gentle with a vertical body and a reciprocating tubular body for the formation of as large particles as possible.
En væsentlig ulempe ved det kendte anlæg er, at den i sedimentationszonen opad strømmende væske nødvendigvis må have' en meget begrænset hastighed, da de i væsken værende faste partikler (fnug) skal afsættes i retning mod bunden, dvs. mod væskens strømningsretning. Ved for stor strømningshastighed vil partiklerne følge med væsken opad.A major disadvantage of the known plant is that the liquid flowing upwards in the sedimentation zone must necessarily have a very limited velocity, since the solid particles (fluff) present in the liquid must be deposited in the direction towards the bottom, ie. towards the flow direction of the liquid. At too high a flow rate, the particles will follow the liquid upwards.
Formålet med opfindelsen er at anvise en fremgangsmåde af den omhandlede art, som tillader intensiv blanding af spildevandet og fældningsmidlet.The object of the invention is to provide a process of the kind which allows intensive mixing of the wastewater and the precipitant.
Dette opnås ifølge opfindelsen ved den i krav 1 anviste fremgangsmåde.This is achieved according to the invention by the method of claim 1.
Ved denne fremgangsmåde sker der en intensiv blanding ved en kraftig turbulens i blandezonen. Herved sikres den bedst mulige udnyttelse af fældningsmidlet.In this process, intensive mixing is effected by a strong turbulence in the mixing zone. This ensures the best possible utilization of the precipitant.
Fra blandezonen passerer blandingen ned gennem en fældnings-zone og videre ud i en sedimentationszone, hvor væsken med sit indhold af faste partikler nærmest tvangfrit "filtreres” gennem et lag af udskilt slam eller fnug. Denne "filtrering" bevirker, at selv de mindre partikler effektivt tilbageholdes, således at væsken efter at have passeret slamlaget kan strømme op til udløbet øverst i sedimentationsbeholderen, uden at der følger faste partikler med. Udfældningen af de faste partikler sker således i partiklernes naturlige bevægelsesretning fra fældningszonen nedad mod beholderens bund og samme vej som væsken bevæger sig. Væskens strømningshastighed kan være væsentlig større end i det kendte anlæg, hvor der ikke finder nogen "filtrering" sted, og hvor udfældningen af de faste partikler sker i retning modsat væskens strømningsretning.From the mixing zone, the mixture passes through a precipitation zone and further into a sedimentation zone, where the liquid with its content of solid particles is almost "filtered" through a layer of separated sludge or lint. This "filtration" causes even the smaller particles is effectively retained so that the liquid, after passing the sludge layer, can flow up to the outlet at the top of the sedimentation vessel without including solid particles. Thus, the solid particles are deposited in the natural direction of movement of the particles from the precipitation zone down towards the bottom of the container and in the same way as the liquid. The flow rate of the liquid may be substantially greater than in the known plant where no "filtration" takes place and where the solid particles are precipitated in the direction opposite to the flow direction of the liquid.
Det har vist sig særlig hensigtsmæssigt at lede spildevandet 3 141961 og det til fældning af dette nødvendige kemiske fældemiddel ind gennem en blanderotor, der befinder sig umiddelbart under vandspejlet i den beholder, hvor behandlingen finder sted.It has been found particularly convenient to pass the wastewater 3 and the precipitate of this necessary chemical trap into a mixing rotor located immediately below the water level in the vessel where the treatment is taking place.
For at opnå en bedre udnyttelse af fældningsmidlet er det ifølge opfindelsen endvidere hensigtsmæssigt at føre en del af det bundfældede slam tilbage til blandezonen. Dette kan ske gennem et eller flere stigrør, der er ført ned i sedimentationszonen. Disse stigrør kan da med fordel stå i forbindelse med den nævnte blanderotor, således at det tilbageførte slam ledes direkte ind i blandezonen i denne rotor under udnyttelse af rotorens sugevirkning·Furthermore, in order to make better use of the precipitating agent, according to the invention it is appropriate to return part of the precipitated sludge to the mixing zone. This can be done through one or more riser pipes that are led down into the sedimentation zone. These riser can then advantageously be connected to said mixing rotor, so that the returned sludge is fed directly into the mixing zone of this rotor using the suction effect of the rotor.
Et formål med opfindelsen er også at anvise et anlæg til udøvelse af fremgangsmåden og omfattende anlæg til udøvelse af den i krav 1 angivne fremgangsmåde og omfattende mindst et tilgangsrør, igennem hvilket spildevandet og fsldningsmieiet sammen ledes ind i en i den øverste del af et første rom i et kar værende blandezone, og med en i blandezonen anbragt blandeanordning. Et sådant anlæg er kendetegnet ved det i krav 3 anførte.An object of the invention is also to provide a plant for carrying out the method and comprising a plant for carrying out the method according to claim 1 and comprising at least one inlet pipe, through which the waste water and the waste water are fed together into one in the upper part of a first compartment. in a vessel mixing zone, and with a mixing device located in the mixing zone. Such an installation is characterized by the one of claim 3.
Opfindelsen skal forklares nærmere i forbindelse med tegningen, hvor fig. 1 viser en første udførelsesform for et spildevands-renseanlæg ifølge opfindelsen i snit, fig. 2 samme set ovenfra, fig. 3 et anlæg i en anden udførelsesform ifølge opfindelsen i snit, og fig. 4 samme set ovenfra.The invention will be explained in more detail in connection with the drawing, in which fig. 1 shows a first embodiment of a sewage treatment plant according to the invention in section; FIG. 2 is a top plan view, FIG. 3 is a sectional view of a second embodiment of the invention, and FIG. 4 same view from above.
Det i fig. 1 og 2 viste renseanlæg omfatter et stumpt kegleformet kar 1 med en indvendig, central skillevæg 4, der strækker sig fra en sedimentationszone 3 ved karrets 1 bund til en position over et vandspejl 2, der under anlæggets drift indstiller sig i karret 1. Skillevæggen 4 opdeler derved karret 1 i et første rum 7, der indeholder en blandezone 5 og en fældezone 6, og et andet rum 9, der indeholder en klarvandszone 8.The FIG. 1 and 2 comprises a blunt cone-shaped vessel 1 with an inner central partition 4 extending from a sedimentation zone 3 at the bottom of the vessel 1 to a position above a water level 2 which, during operation of the system, aligns in the vessel 1. The partition 4 thereby dividing the vessel 1 into a first compartment 7 containing a mixing zone 5 and a trap zone 6, and a second compartment 9 containing a clear water zone 8.
Spildevandet og det til dettes fældning tjenende fældemiddel ledes ind i den øverst i rummet 7 værende blandezone 5 gennem en rørledning 10, der med sin udtrædelsesåbning befinder sig direkte under sugeåbningen i en med en blanderotor 11 forsynet blandeanordning 12. Blanderotoren 11 befinder sig i en sådan afstand under vandspejlet 2, at iltopblanding undgås.The wastewater and its precipitating precipitate are fed into the mixing zone 5 at the top of the space 7 through a pipeline 10 which, with its exit opening, is directly below the suction opening in a mixing device 12 provided with a mixing rotor 11. distance below the water level 2, avoiding oxygen mixing.
Fældemidlet indføres i røret 10 gennem en ledning 13 i en pas- 4 141961 sende afstand fra dettes udtrædelsesåbning, således at en forblanding allerede, bar fundet sted,inden den egentlige intensive blanding finder sted i blandeanordningen 12.The trap means is introduced into the tube 10 through a conduit 13 at a suitable distance from its exit aperture such that a premix has already occurred before the actual intensive mixing takes place in the mixing device 12.
Blandingen af spildevand og fældemiddel ledes fra blandeanordningen 12 ud i blandezonen 5, hvorfra blandingen strømmer videre ned i den underliggende fældezone 6. Den af blanderotoren 11 forårsagede væskestrøm i rummet 7 virker fremmende for fældningsprocessen og udskillelsen af de fældede partikler.The wastewater and trap mixture is discharged from the mixing device 12 into the mixing zone 5, from which the mixture flows further into the underlying trap zone 6. The fluid flow caused by the mixer rotor 11 in the space 7 promotes the precipitation process and the separation of the precipitated particles.
For at styre væskestrømmen i rummet 7 i faste baner er der i zonen 6 indbygget en skrueformet ledeplade 14, der leder væskestrømmen ned gennem rummet 6 i en skruelinieformet bane.In order to control the fluid flow in the space 7 in fixed paths, a screw-shaped baffle 14 is built into the zone 6 which guides the fluid flow down through the space 6 in a helical path.
De i spildevandet udskilte faste partikler har en større specifik massefylde end vandet, hvorfor en bundfældning i sedimentationszonen 3 finder sted. Den for faste partikler befriede væske strømmer fra zonen 6 ud i klarvandszonen 8, der befinder sig i karret 1 omkring skillevæggen 4. Øverst i klarvands zonen 8 findes en afløbsrende 15, hvorigennem det kemisk rensede spildevand udledes.The solid particles separated into the wastewater have a greater specific density than the water, which is why a sedimentation in the sedimentation zone 3 takes place. The solid particles liberated liquid flows from zone 6 into the clear water zone 8 located in the vessel 1 around the partition wall 4. At the top of the clear water zone 8 there is a drainage channel 15 through which the chemically purified waste water is discharged.
For at kunne udnytte det i det bundfældede slam endnu værende aktive fældemiddel, er der mellem sedimentationszonen 3 og blandero-torens 11 sugeåbning indsat et stigrør 16, hvorigennem en regulerbar strøm af slam fra zonen 3 ledes tilbage til blandezonen. Denne strøm opstår som følge af blanderotorens 11 sugevirkning. Den returnerede slammængde kan udgøre en større del af blandeanordningens indtag end den samtidig tilførte mængde frisk spildevand og fældemiddel. Den stadige kredsløbsstrømning sikrer en optimal udnyttelse af det tilførte fældemiddel, hvilket er af afgørende betydning for driftsomkostningerne. Da en del af det rensede spildevand også deltager i kredsløbstrømningen, sker der en fortynding af det tilførte friske spildevand i zonen 5. Denne fortynding har en gunstig udlignende virkning ved optrædende stødvise belastninger.In order to utilize the sediment still present in the precipitated sludge, a riser 16 is inserted between the sedimentation zone 3 and the suction opening 11 of the mixing rotor 11, through which a controllable stream of sludge from the zone 3 is directed back to the mixing zone. This flow occurs as a result of the suction action of the mixer 11. The amount of sludge returned may comprise a greater proportion of the mixer intake than the simultaneously supplied fresh wastewater and trap material. The continuous circulation ensures optimum utilization of the added trap, which is crucial for the operating costs. Since part of the purified wastewater also participates in the circulation flow, dilution of the fresh fresh wastewater is effected in zone 5. This dilution has a favorable countervailing effect in the event of shock loads.
Det i sedimentationszonen 3 udfældede slam aftappes gennem et udtag 17 i takt med udfældningen af nyt slam. Udtaget 17 kan være styret fuldautomatisk eksempelvis ved hjælp af en med to fotoceller udstyret styreanordning. De to fotoceller er anbragt i forskelligt niveau, og når slamspejlet når op i højde med den øverste fotocelle, vil denne ved registrering af lysafbrydelsen bevirke en åbning af slamudtaget 17. Udtaget forbliver åben,* indtil den underste fotocelle registrerer lys, dvs. indtil slamspejlet er sænket til et niveau under denne fotocelle. Når dette sker, lukkes udtaget 17 igen. Det er såle- 5 141961 des den klare adskillelse mellem det rensede vand og slammet i zonen 8, der udnyttes til den automatiske styring af slamudtaget.The sludge deposited in the sedimentation zone 3 is drained through an outlet 17 as the new sludge precipitates. The outlet 17 can be controlled fully automatically, for example by means of a two photocell control device. The two photocells are placed at different levels, and when the sludge mirror reaches the height of the upper photocell, it will, when recording the light switch off, open the sludge outlet 17. The outlet remains open until the lower photocell detects light, ie. until the sludge mirror is lowered to a level below this photocell. When this happens, recess 17 closes again. Thus, the clear separation between the purified water and the sludge in zone 8 is utilized for the automatic control of the sludge outlet.
En væsentlig fordel ved det beskrevne anlæg består i, at samtlige de til fældningen nødvendige processer såsom blanding, bundfældning og recirkulering, finder sted i en samlet, forholdsvis kompakt enhed. Endvidere er det væsentligt, at spildevandet, der skal behandles, ledes ind umiddelbart under vandspejlet 2 i blandezonen 5, således at en stadig visuel kontrol kan finde sted.A major advantage of the plant described is that all the processes required for the precipitation such as mixing, settling and recycling take place in a single, relatively compact unit. Furthermore, it is essential that the wastewater to be treated is fed directly under the water level 2 into the mixing zone 5 so that a continuous visual check can take place.
Placeringen af blandeanordningen 12 i niveau med vandspejlet 2 gør, at man til enhver tid kan komme til anordningen uden først at skulle tømme karret 1 for væske, og man undgår samtidig at skulle udforme blandeanordningen med en lang drivaksel. På grund af blandean-ordningens beskedne trykhøjde opnås en optimal blande- og cirkulationsvirkning.The positioning of the mixing device 12 at the level of the water level 2 means that one can reach the device at any time without first emptying the vessel 1 of liquid, while avoiding the need to design the mixing device with a long drive shaft. Due to the low pressure height of the mixing device, an optimal mixing and circulation effect is obtained.
Ved det opfindelsesmæssige anlæg finder bundfældningen af de udskilte partikler sted direkte under og i naturlig tilknytning til blandezonen 5, hvor den intensive blanding af spildevandet og fældemidlet finder sted. Fældningsprocessen fremmes af den i zonen 6 værende væskestrøm.In the inventive plant, the precipitation of the separated particles takes place directly below and in natural connection with the mixing zone 5, where the intensive mixing of the wastewater and the precipitant takes place. The precipitation process is facilitated by the fluid flow in zone 6.
Den i fig. 3 og 4 viste udførelsesform for et renseanlæg ifølge opfindelsen adskiller sig kun fra det i fig. 1 og 2 viste ved karrets 1 form, som her danner en nedadvendende spids.The FIG. 3 and 4 of a cleaning system according to the invention differs only from that of FIG. 1 and 2 are shown in the shape of the vessel 1, which here forms a downward point.
Claims (3)
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CH87571 | 1971-01-21 | ||
| CH87571A CH520081A (en) | 1971-01-21 | 1971-01-21 | Process for chemical waste water purification and device for carrying out the process |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| DK141961B true DK141961B (en) | 1980-07-28 |
| DK141961C DK141961C (en) | 1981-01-26 |
Family
ID=4197206
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| DK30572AA DK141961B (en) | 1971-01-21 | 1972-01-21 | Process for chemical wastewater treatment and plant for carrying out the process. |
Country Status (26)
| Country | Link |
|---|---|
| AR (1) | AR197294A1 (en) |
| AT (1) | AT305158B (en) |
| BE (1) | BE778221A (en) |
| BG (1) | BG19371A3 (en) |
| BR (1) | BR7200351D0 (en) |
| CA (1) | CA984528A (en) |
| CH (1) | CH520081A (en) |
| CS (1) | CS178866B2 (en) |
| DD (1) | DD96219A5 (en) |
| DE (1) | DE2106926A1 (en) |
| DK (1) | DK141961B (en) |
| ES (1) | ES399069A1 (en) |
| FR (1) | FR2122564B1 (en) |
| GB (1) | GB1382161A (en) |
| IE (1) | IE35998B1 (en) |
| IL (1) | IL38574A (en) |
| IT (1) | IT949381B (en) |
| LU (1) | LU64627A1 (en) |
| NL (1) | NL7200450A (en) |
| NO (1) | NO132192C (en) |
| OA (1) | OA04396A (en) |
| PL (1) | PL77362B1 (en) |
| RO (1) | RO62994A (en) |
| SE (1) | SE381033B (en) |
| SU (1) | SU634658A3 (en) |
| ZA (1) | ZA72299B (en) |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| NL187312C (en) * | 1978-05-18 | 1991-08-16 | Dhv Raadgevend Ing | METHOD FOR DEPOSPHATING WATER. |
| CN107244724B (en) * | 2017-07-31 | 2023-09-15 | 中国中车股份有限公司 | Small coagulating sedimentation tank and method suitable for dispersing sewage drainage characteristics |
| CN113955835A (en) * | 2021-10-26 | 2022-01-21 | 陈成 | Industrial heavy metal sewage treatment system |
| CN115321653A (en) * | 2022-08-22 | 2022-11-11 | 马中逸 | Environment-friendly sewage flocculant and preparation method thereof |
| CN115504558B (en) * | 2022-11-01 | 2023-03-10 | 临沭冠山升华食品有限公司 | Effluent treatment plant is used in production of dehydration garlic piece |
| CN116253491B (en) * | 2023-02-28 | 2024-06-11 | 腾达建设集团股份有限公司 | Method, device, equipment and storage medium for determining flocculation precipitation efficiency |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR457224A (en) * | 1913-04-29 | 1913-09-13 | C Et G Pulinx Soc | Water purifier |
| DE550842C (en) * | 1928-08-30 | 1932-05-24 | Bamag Meguin Akt Ges | Device for cleaning liquids |
| FR1283257A (en) * | 1960-12-20 | 1962-02-02 | Process for the separation of solids and liquids |
-
1971
- 1971-01-21 CH CH87571A patent/CH520081A/en not_active IP Right Cessation
- 1971-02-13 DE DE19712106926 patent/DE2106926A1/en not_active Ceased
- 1971-02-16 AT AT133971A patent/AT305158B/en not_active IP Right Cessation
-
1972
- 1972-01-12 NL NL7200450A patent/NL7200450A/xx not_active Application Discontinuation
- 1972-01-17 IL IL38574A patent/IL38574A/en unknown
- 1972-01-17 ZA ZA720299A patent/ZA72299B/en unknown
- 1972-01-19 BE BE778221A patent/BE778221A/en unknown
- 1972-01-19 LU LU64627D patent/LU64627A1/xx unknown
- 1972-01-19 BG BG019513A patent/BG19371A3/en unknown
- 1972-01-19 PL PL1972152969A patent/PL77362B1/pl unknown
- 1972-01-20 AR AR240167A patent/AR197294A1/en active
- 1972-01-20 GB GB274372A patent/GB1382161A/en not_active Expired
- 1972-01-20 ES ES399069A patent/ES399069A1/en not_active Expired
- 1972-01-20 NO NO0127/72A patent/NO132192C/no unknown
- 1972-01-20 CA CA132,877A patent/CA984528A/en not_active Expired
- 1972-01-20 DD DD160434A patent/DD96219A5/xx unknown
- 1972-01-20 IE IE80/72A patent/IE35998B1/en unknown
- 1972-01-20 OA OA54474A patent/OA04396A/en unknown
- 1972-01-20 FR FR7201957A patent/FR2122564B1/fr not_active Expired
- 1972-01-20 IT IT12423/72A patent/IT949381B/en active
- 1972-01-21 RO RO7200069479A patent/RO62994A/en unknown
- 1972-01-21 SU SU721739317A patent/SU634658A3/en active
- 1972-01-21 CS CS7200000415A patent/CS178866B2/en unknown
- 1972-01-21 SE SE7200702A patent/SE381033B/en unknown
- 1972-01-21 DK DK30572AA patent/DK141961B/en unknown
- 1972-01-21 BR BR351/72A patent/BR7200351D0/en unknown
Also Published As
| Publication number | Publication date |
|---|---|
| SU634658A3 (en) | 1978-11-25 |
| GB1382161A (en) | 1975-01-29 |
| IL38574A (en) | 1976-02-29 |
| IE35998L (en) | 1972-07-21 |
| NO132192C (en) | 1975-10-01 |
| OA04396A (en) | 1980-02-15 |
| LU64627A1 (en) | 1972-06-26 |
| DE2106926A1 (en) | 1972-08-03 |
| CA984528A (en) | 1976-02-24 |
| BR7200351D0 (en) | 1973-06-14 |
| FR2122564A1 (en) | 1972-09-01 |
| RO62994A (en) | 1978-03-15 |
| CS178866B2 (en) | 1977-10-31 |
| SE381033B (en) | 1975-11-24 |
| BG19371A3 (en) | 1975-06-15 |
| NL7200450A (en) | 1972-07-25 |
| DK141961C (en) | 1981-01-26 |
| FR2122564B1 (en) | 1977-07-15 |
| AR197294A1 (en) | 1974-03-29 |
| IL38574A0 (en) | 1972-03-28 |
| NO132192B (en) | 1975-06-23 |
| ES399069A1 (en) | 1974-11-16 |
| CH520081A (en) | 1972-03-15 |
| IT949381B (en) | 1973-06-11 |
| DD96219A5 (en) | 1973-03-12 |
| IE35998B1 (en) | 1976-07-21 |
| ZA72299B (en) | 1972-09-27 |
| AT305158B (en) | 1973-02-12 |
| BE778221A (en) | 1972-05-16 |
| PL77362B1 (en) | 1975-04-30 |
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