NO152458B - PROCEDURE AND ELECTROLYCLE CELLS FOR THE MANUFACTURE OF METAL, SPECIFIC ALUMINUM OR MAGNESIUM. - Google Patents
PROCEDURE AND ELECTROLYCLE CELLS FOR THE MANUFACTURE OF METAL, SPECIFIC ALUMINUM OR MAGNESIUM. Download PDFInfo
- Publication number
- NO152458B NO152458B NO3180/72A NO318072A NO152458B NO 152458 B NO152458 B NO 152458B NO 3180/72 A NO3180/72 A NO 3180/72A NO 318072 A NO318072 A NO 318072A NO 152458 B NO152458 B NO 152458B
- Authority
- NO
- Norway
- Prior art keywords
- container
- mass
- sieve body
- sieve
- bleach
- Prior art date
Links
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 title 1
- 229910052782 aluminium Inorganic materials 0.000 title 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 title 1
- 229910052749 magnesium Inorganic materials 0.000 title 1
- 239000011777 magnesium Substances 0.000 title 1
- 238000004519 manufacturing process Methods 0.000 title 1
- 238000000034 method Methods 0.000 title 1
- 238000004061 bleaching Methods 0.000 claims description 11
- 239000007844 bleaching agent Substances 0.000 claims description 10
- 239000007788 liquid Substances 0.000 claims description 9
- 229920002678 cellulose Polymers 0.000 claims description 4
- 239000001913 cellulose Substances 0.000 claims description 4
- 238000003756 stirring Methods 0.000 claims description 3
- 239000012141 concentrate Substances 0.000 claims description 2
- 238000010438 heat treatment Methods 0.000 claims description 2
- 238000012216 screening Methods 0.000 claims description 2
- 238000010793 Steam injection (oil industry) Methods 0.000 description 1
- ATJFFYVFTNAWJD-UHFFFAOYSA-N Tin Chemical compound [Sn] ATJFFYVFTNAWJD-UHFFFAOYSA-N 0.000 description 1
- 238000013019 agitation Methods 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 230000001276 controlling effect Effects 0.000 description 1
- 238000010790 dilution Methods 0.000 description 1
- 239000012895 dilution Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 239000011150 reinforced concrete Substances 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 239000004460 silage Substances 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
- 238000005406 washing Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- 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
- B01D53/68—Halogens or halogen compounds
-
- C—CHEMISTRY; METALLURGY
- C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
- C25C—PROCESSES FOR THE ELECTROLYTIC PRODUCTION, RECOVERY OR REFINING OF METALS; APPARATUS THEREFOR
- C25C3/00—Electrolytic production, recovery or refining of metals by electrolysis of melts
- C25C3/06—Electrolytic production, recovery or refining of metals by electrolysis of melts of aluminium
- C25C3/08—Cell construction, e.g. bottoms, walls, cathodes
-
- C—CHEMISTRY; METALLURGY
- C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
- C25C—PROCESSES FOR THE ELECTROLYTIC PRODUCTION, RECOVERY OR REFINING OF METALS; APPARATUS THEREFOR
- C25C3/00—Electrolytic production, recovery or refining of metals by electrolysis of melts
- C25C3/06—Electrolytic production, recovery or refining of metals by electrolysis of melts of aluminium
- C25C3/18—Electrolytes
-
- C—CHEMISTRY; METALLURGY
- C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
- C25C—PROCESSES FOR THE ELECTROLYTIC PRODUCTION, RECOVERY OR REFINING OF METALS; APPARATUS THEREFOR
- C25C3/00—Electrolytic production, recovery or refining of metals by electrolysis of melts
- C25C3/06—Electrolytic production, recovery or refining of metals by electrolysis of melts of aluminium
- C25C3/22—Collecting emitted gases
-
- C—CHEMISTRY; METALLURGY
- C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
- C25C—PROCESSES FOR THE ELECTROLYTIC PRODUCTION, RECOVERY OR REFINING OF METALS; APPARATUS THEREFOR
- C25C7/00—Constructional parts, or assemblies thereof, of cells; Servicing or operating of cells
- C25C7/005—Constructional parts, or assemblies thereof, of cells; Servicing or operating of cells of cells for the electrolysis of melts
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Health & Medical Sciences (AREA)
- Biomedical Technology (AREA)
- Environmental & Geological Engineering (AREA)
- Analytical Chemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Electrolytic Production Of Metals (AREA)
- Battery Electrode And Active Subsutance (AREA)
- Secondary Cells (AREA)
Description
Beholder for blekning av cellulo<g>emasse. Container for bleaching cellulose pulp.
Den foreliggende oppfinnelse angår en beholder for bleking av cellulosemasse, og hensikten med oppfinnelsen er å utforme beholderen slik at blekereaksjonen kan gjennomføres ved høy konsentrasjon av massen, til tross for at innblandingen av blekemidlet i massen skjer ved lav konsentrasjon av denne. The present invention relates to a container for bleaching cellulose pulp, and the purpose of the invention is to design the container so that the bleaching reaction can be carried out at a high concentration of the pulp, despite the fact that the mixing of the bleaching agent in the pulp takes place at a low concentration of this.
Oppfinnelsen er hovedsakelig karakterisert ved at et rum like over beholderens bunn er utformet som et med omrørings-anordninger forsynt blandekammer, hvori massen ved forholdsvis lav konsentrasjon blandes intimt med blekemiddel, og som er avgrenset fra beholderen forøvrig ved hjelp av et sillegeme som er forsynt med gjennomløpsåpninger for massen, og som er innrettet til å rotere om beholderens akse og strekker seg ut til i nærheten av dens vegg slik at stort sett hele beholdertverrsnittet blir bestrøket av det, og som ved massens passasje konsentrerer massen ved avsiling og bortledning av en del av dens væskeinnhold. The invention is mainly characterized by the fact that a space just above the bottom of the container is designed as a mixing chamber equipped with stirring devices, in which the mass at a relatively low concentration is intimately mixed with bleach, and which is delimited from the rest of the container by means of a sieve body which is provided with through openings for the mass, and which are arranged to rotate about the axis of the container and extend to near its wall so that almost the entire cross-section of the container is coated with it, and which, during the passage of the mass, concentrates the mass by screening and diverting part of its liquid content.
Ytterligere trekk ved oppfinnelsen vil fremgå av den følgende beskrivelse av en utførelsesform av blekebeholderen i forbindelse med tegningen. Fig. 1 viser skjematisk blekebeholderen samt visse anordninger tilsluttet dens inn-matningsende. Fig. 2, 3 og 4 viser tverrsnitt av beholderen efter linjene henholdsvis II—II, III—III og IV—IV på fig. 1, og Further features of the invention will be apparent from the following description of an embodiment of the bleach container in connection with the drawing. Fig. 1 schematically shows the bleach container and certain devices connected to its feed end. Fig. 2, 3 and 4 show cross-sections of the container along the lines II—II, III—III and IV—IV respectively in fig. 1, and
fig. 5 er en forstørrelse av det parti av fig. 1 som er avmerket med en sirkel V. fig. 5 is an enlargement of the part of fig. 1 which is marked with a circle V.
Den viste blekebeholder har hovedsakelig form av en vertikal sylinder og er bestemt til å utføre blekning av cellulosemasse mens denne beveger seg kontinuer-lig oppover gjennom beholderen. Beholderens sylindriske vegg 11, som kan være av blikk eller armert betong, går nedentil over i en bunn 13, som er vist sfærisk avrundet, men som alternativt kan være konisk eller utført som en konsentrisk, ringformet ren-ne eller ha en vilkårlig annen form som slutter seg til veggen 11 og gir en egnet nedre avslutning for beholderen uten skarpe hjørner eller overganger.Oventil av-sluttes beholderen av et lokk 15 og en ren-ne 17 anordnet rundt og på yttersiden av overkanten av den sylindriske vegg 11, hvori den vertikalt oppstigende masse i beholderen nedmates ved hjelp av en på lokket festet, roterende skrapeanordning 19, og hvorfra massen går videre gjennom et utløpsrør 21. The bleaching container shown is mainly in the form of a vertical cylinder and is intended to carry out bleaching of cellulose pulp while it moves continuously upwards through the container. The container's cylindrical wall 11, which can be made of tin or reinforced concrete, merges below into a bottom 13, which is shown spherically rounded, but which can alternatively be conical or designed as a concentric, ring-shaped channel or have any other shape which joins the wall 11 and provides a suitable lower end for the container without sharp corners or transitions. Above, the container is closed off by a lid 15 and a drain 17 arranged around and on the outside of the upper edge of the cylindrical wall 11, in which the vertically rising mass in the container is fed down by means of a rotating scraper device 19 attached to the lid, and from where the mass continues through an outlet pipe 21.
Massen som skal blekes i beholderen, forutsettes å komme fra et roterende vas-kefilter 23 og drives ved hjelp av en pumpe 25 gjennom en ledning 27 inn i beholderen gjennom et innløp 29, som er plasert sentralt i beholderens bunn 13. Konsisten-sen av den tilførte masse kan være forholdsvis konsentrert. The mass to be bleached in the container is assumed to come from a rotating washing filter 23 and is driven by means of a pump 25 through a line 27 into the container through an inlet 29, which is placed centrally in the bottom 13 of the container. The consistency of the added mass can be relatively concentrated.
I beholderens nedre del og hensiktsmessig omtrent i høyde med det sted hvor beholderens tverrsnitt begynner å avta for å gå over i bunnen 13, er der anordnet et roterbart sillegeme, bestående av hovedsakelig horisontale silplater 31, 33, 35, festet til et sentralt nav 37. Silplatene er sirkelsektorformede i grunnriss og be- In the lower part of the container and conveniently approximately at the height of the place where the cross-section of the container begins to decrease to pass into the bottom 13, there is arranged a rotatable sieve body, consisting of mainly horizontal sieve plates 31, 33, 35, attached to a central hub 37 The strainer plates are circular sector-shaped in plan and be-
grenses således av omtrent radialtgående rette kanter og av en sirkelbueformet kant som befinner seg i liten avstand fra veg- is thus bordered by roughly radial straight edges and by a circular arc-shaped edge that is located at a small distance from the road
gen 11. Mellom platene 31, 33, 35 er der levnet sektorformede mellomrum 39, 41, 43 gen 11. Between the plates 31, 33, 35 there are left sector-shaped spaces 39, 41, 43
hvor massen kan stige opp forbi sillege- where the mass can rise past sillege-
met. Sillegemet danner den øvre begrens- met. The silt body forms the upper limit of
ning for et blandekammer 45, som er an- for a mixing chamber 45, which is
ordnet ved bunnen 13 av beholderen i til- arranged at the bottom 13 of the container in the
slutning til innløpet 29. I dette kammer 45 kan der skje en intim blanding av det innførte materiale ved hjelp av rørean-ordninger 47 med roterende skrueblad el- connection to the inlet 29. In this chamber 45, an intimate mixing of the introduced material can take place by means of stirring devices 47 with rotating screw blades or
ler pumpehjul. ler impeller.
Sillegemets nav 37 er festet til en ak- The herringbone hub 37 is attached to an ac-
sel 49 som er anbragt koaksialt med be- seal 49 which is arranged coaxially with the
holderen og går gjennom beholderens bunn, og som ved sin nedre ende er koblet til en motor 51 over en transmisjon. Sil- the holder and passes through the bottom of the container, and which is connected at its lower end to a motor 51 via a transmission. Sil-
platene 31, 33, 35 er utført dobbeltvegget, plates 31, 33, 35 are double-walled,
og såvel deres øvre som nedre plane sider er gjennombrutt av hull 53 eller slisser, hvorigjennom væskeinnholdet i massen, and both their upper and lower flat sides are pierced by holes 53 or slits, through which the liquid content of the mass,
men ikke dens fibre, kan komme inn i det indre hulrum 55 i silplatene. but not its fibres, can enter the inner cavity 55 of the sieve plates.
Akselen 49 har en boring som oventil The shaft 49 has a bore as above
står i forbindelse med silplatenes hulrum 55 og nedentil er tilsluttet en ytre, fast sir-kulasjonsledning 57. I denne ledning er der innsatt en pumpe 59, som suger ut væske fra sillegemet og driver den videre til ledningens annen ende, som er tilslut- is in connection with the sieve plates' cavity 55 and is connected below to an outer, fixed circulation line 57. In this line a pump 59 is inserted, which sucks out liquid from the sieve body and drives it on to the other end of the line, which is connected to
tet innløpet 29, så væsken holdes i sirkula- close the inlet 29, so that the liquid is kept in circulation
sjon. Gjennom ledningen 61 kan man efter behov tilføre sirkulasjonsledningen vann for å holde en ønsket konsentrasjon av den oppspedde masse i blandekammeret 45. tion. Through the line 61, water can be added to the circulation line as needed to maintain a desired concentration of the mixed mass in the mixing chamber 45.
Ved hjelp av en varmeveksler 63 innsatt Using a heat exchanger 63 inserted
i ledningen 57 eller ved direkte dampinn-sprøytning kan der tilføres den sirkule- in line 57 or by direct steam injection, the circulating
rende væske varme i nødvendig grad for å holde en ønsket reaksjonstemperatur i blekebeholderen. Vedkommende blekemid- heating liquid to the necessary degree to maintain a desired reaction temperature in the bleaching container. The relevant bleach-
del tilføres gjennom en ledning 65 og inn- part is supplied through a line 65 and in-
føres i sirkulasjonsledningen f. eks. ved hjelp av en dampinjektor 67. I blandekammeret 45 blandes blekemidlet intimt med massen, og blandingen lettes av mas- is carried in the circulation line, e.g. by means of a steam injector 67. In the mixing chamber 45, the bleaching agent is intimately mixed with the pulp, and the mixture is eased by mass-
sens oppspedning til lav konsentrasjon. slow dilution to low concentration.
Når massen drives opp gjennom sillege- When the mass is driven up through the silage
mets gjennomløpsåpninger, vil den i jevn fordeling over hele beholdertverrsnittet bli utsatt for sillegemets sugevirkning, hvor- met's through-holes, it will be exposed in an even distribution over the entire container cross-section to the suction effect of the sieve body, where-
under væskeinnholdet delvis avsuges og føres bort gjennom den hule aksel 49, mens den således konsentrerte masse uten yt- below the liquid content is partially sucked off and carried away through the hollow shaft 49, while the thus concentrated mass without surface
terligere omrøring sakte stiger videre opp gjennom beholderen, hvorved blekereak- further agitation slowly rises further up through the container, whereby the bleaching reac-
sjonen blir gjennomført ved ønskelig høy konsentrasj on. The operation is carried out at a desirable high concentration.
For å hindre massen i å føres med i rotasjonen av sillegemet er der på et nivå To prevent the mass from being carried along in the rotation of the sieve body there is a level
like ovenfor dette i veggen 11 fastgjort radialtstillede vinger 69, som er innbyrdes forbundet midt i beholderen. En lignende rekke radialtstillede vinger 71 er festet i veggen 11 i et plan umiddelbart under sil- just above this in the wall 11 fixed radially arranged wings 69, which are interconnected in the middle of the container. A similar series of radially arranged wings 71 is fixed in the wall 11 in a plane immediately below the sil-
platene og ved sine indre ender forbun- the plates and at their inner ends connected
det med en ring 73 som omslutter akse- that with a ring 73 that encloses the axis
len 49. Alle disse vinger har sin hovedut-strekning i vertikale plan for å kunne ut- len 49. All these wings have their main extent in a vertical plane in order to be able to
øve en styrende virkning på den oppsti- exert a controlling effect on the ascendant
gende masse. gende mass.
Den ovenfor beskrevne utførelse kan modifiseres på følgende måter. Således kan blekemidlet tilsettes massen allerede før denne kommer inn i blekebeholderen, The embodiment described above can be modified in the following ways. Thus, the bleaching agent can be added to the mass even before it enters the bleaching container,
og massen kan være av tynn konsistens allerede når den trer inn i beholderen. and the mass can be of a thin consistency already when it enters the container.
Claims (4)
Applications Claiming Priority (5)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US17861171A | 1971-09-08 | 1971-09-08 | |
| US00178650A US3822195A (en) | 1971-09-08 | 1971-09-08 | Metal production |
| US17889871A | 1971-09-09 | 1971-09-09 | |
| US17886471A | 1971-09-09 | 1971-09-09 | |
| US17889571A | 1971-09-09 | 1971-09-09 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| NO152458B true NO152458B (en) | 1985-06-24 |
| NO152458C NO152458C (en) | 1985-10-02 |
Family
ID=27538992
Family Applications (3)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| NO3180/72A NO152458C (en) | 1971-09-08 | 1972-09-07 | PROCEDURE AND ELECTROLYCLE CELLS FOR MANUFACTURE OF METAL, SPECIFIC ALUMINUM OR MAGNESIUM |
| NO781299A NO141095C (en) | 1971-09-08 | 1978-04-13 | PROCEDURE FOR THE PREPARATION OF ALUMINUM BY MELT ELECTROLYZE OF ALUMINUM CHLORIDE |
| NO792190A NO792190L (en) | 1971-09-08 | 1979-06-29 | METHOD OF MANUFACTURE OF METAL AND CELL FOR USE OF THE METHOD |
Family Applications After (2)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| NO781299A NO141095C (en) | 1971-09-08 | 1978-04-13 | PROCEDURE FOR THE PREPARATION OF ALUMINUM BY MELT ELECTROLYZE OF ALUMINUM CHLORIDE |
| NO792190A NO792190L (en) | 1971-09-08 | 1979-06-29 | METHOD OF MANUFACTURE OF METAL AND CELL FOR USE OF THE METHOD |
Country Status (15)
| Country | Link |
|---|---|
| JP (1) | JPS5215044B2 (en) |
| AT (1) | AT329891B (en) |
| AU (1) | AU461962B2 (en) |
| CH (1) | CH553254A (en) |
| DD (1) | DD99396A5 (en) |
| DE (1) | DE2244036C2 (en) |
| FR (1) | FR2152814B1 (en) |
| GB (1) | GB1403892A (en) |
| HU (2) | HU168156B (en) |
| IT (1) | IT965246B (en) |
| NL (1) | NL156450B (en) |
| NO (3) | NO152458C (en) |
| PL (1) | PL76069B1 (en) |
| RO (1) | RO71622A (en) |
| YU (2) | YU226772A (en) |
Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5814515B2 (en) * | 1977-04-08 | 1983-03-19 | 日本軽金属株式会社 | Double electrode type aluminum electrolyzer |
| US4110178A (en) * | 1977-05-17 | 1978-08-29 | Aluminum Company Of America | Flow control baffles for molten salt electrolysis |
| FR2506789A1 (en) * | 1981-05-29 | 1982-12-03 | Pechiney Aluminium | ELECTROLYTIC PRODUCTION CELL OF A METAL FROM ITS HALIDE |
| US4440610A (en) * | 1982-09-27 | 1984-04-03 | Aluminum Company Of America | Molten salt bath for electrolytic production of aluminum |
| EP2407228B1 (en) * | 2010-07-14 | 2016-09-07 | General Electric Technology GmbH | Gas cleaning unit and method for cleaning gas |
| CN111321426B (en) * | 2020-02-21 | 2021-02-19 | 东北大学 | Device for preparing aluminum by molten salt electrolysis by taking gaseous aluminum chloride as raw material and aluminum chloride feeding method |
| CN114030063B (en) * | 2021-11-03 | 2023-02-14 | 阿坝铝厂 | Pre-baked anode carbon block anti-oxidation structure |
| WO2023111641A1 (en) * | 2021-12-15 | 2023-06-22 | Arcelormittal | Compact apparatus for production of iron metal by electrolysis |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB198024A (en) * | 1922-02-18 | 1923-05-18 | Edgar Arthur Ashcroft | Improved process and apparatus for electrolysing fused salts of metals and recovering the metals and acid radicles, and the application of the said process and apparatus to the recovery of valuable constituents from metal bearing ores, and materials |
| DE399693C (en) * | 1922-02-18 | 1924-07-29 | Edgar Arthur Ashcroft | Method and device for the electrolytic treatment of molten metal salts |
| DE401917C (en) * | 1923-01-11 | 1924-09-10 | Edgar Arthur Ashcroft | Device for the electrolytic treatment of molten metal salts |
| US2393686A (en) * | 1942-02-06 | 1946-01-29 | Mathieson Alkali Works | Electrolytic production of magnesium |
| US2393685A (en) * | 1942-12-14 | 1946-01-29 | Mathieson Alkali Works | Electrolytic cell |
| US2830940A (en) * | 1952-03-28 | 1958-04-15 | Monsanto Chemicals | Production of metals |
-
1972
- 1972-08-22 GB GB3903372A patent/GB1403892A/en not_active Expired
- 1972-08-30 AU AU46116/72A patent/AU461962B2/en not_active Expired
- 1972-09-05 DE DE2244036A patent/DE2244036C2/en not_active Expired
- 1972-09-06 PL PL1972157622A patent/PL76069B1/en unknown
- 1972-09-06 JP JP47089426A patent/JPS5215044B2/ja not_active Expired
- 1972-09-07 IT IT52596/72A patent/IT965246B/en active
- 1972-09-07 NO NO3180/72A patent/NO152458C/en unknown
- 1972-09-07 YU YU02267/72A patent/YU226772A/en unknown
- 1972-09-07 HU HUAU287A patent/HU168156B/hu unknown
- 1972-09-07 HU HU72AU00000347A patent/HU170773B/en unknown
- 1972-09-08 AT AT774272A patent/AT329891B/en not_active IP Right Cessation
- 1972-09-08 RO RO197272168A patent/RO71622A/en unknown
- 1972-09-08 CH CH1323472A patent/CH553254A/en not_active IP Right Cessation
- 1972-09-08 FR FR7232005A patent/FR2152814B1/fr not_active Expired
- 1972-09-08 DD DD165560A patent/DD99396A5/xx unknown
- 1972-09-08 NL NL7212287.A patent/NL156450B/en not_active IP Right Cessation
-
1978
- 1978-04-13 NO NO781299A patent/NO141095C/en unknown
-
1979
- 1979-06-29 NO NO792190A patent/NO792190L/en unknown
- 1979-07-19 YU YU01770/79A patent/YU177079A/en unknown
Also Published As
| Publication number | Publication date |
|---|---|
| RO71622A (en) | 1981-04-30 |
| YU177079A (en) | 1982-06-30 |
| AU4611672A (en) | 1974-03-07 |
| AU461962B2 (en) | 1975-06-12 |
| HU170773B (en) | 1977-09-28 |
| DD99396A5 (en) | 1973-08-05 |
| NO152458C (en) | 1985-10-02 |
| ATA774272A (en) | 1975-08-15 |
| AT329891B (en) | 1976-06-10 |
| JPS5215044B2 (en) | 1977-04-26 |
| FR2152814A1 (en) | 1973-04-27 |
| HU168156B (en) | 1976-03-28 |
| IT965246B (en) | 1974-01-31 |
| GB1403892A (en) | 1975-08-28 |
| YU226772A (en) | 1982-02-28 |
| DE2244036C2 (en) | 1986-04-03 |
| NO781299L (en) | 1973-03-09 |
| NL156450B (en) | 1978-04-17 |
| NO141095B (en) | 1979-10-01 |
| NL7212287A (en) | 1973-03-12 |
| PL76069B1 (en) | 1975-02-28 |
| DE2244036A1 (en) | 1973-03-29 |
| NO141095C (en) | 1980-01-09 |
| JPS4836006A (en) | 1973-05-28 |
| CH553254A (en) | 1974-08-30 |
| NO792190L (en) | 1973-03-09 |
| FR2152814B1 (en) | 1975-01-03 |
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