DE2435704C3 - Verfahren und Vorrichtung zur kontinuierlichen Entfernung von Restgehalten an Monomeren aus wäßrigen Dispersionen von Polymerisaten des Vinylchlorids - Google Patents
Verfahren und Vorrichtung zur kontinuierlichen Entfernung von Restgehalten an Monomeren aus wäßrigen Dispersionen von Polymerisaten des VinylchloridsInfo
- Publication number
- DE2435704C3 DE2435704C3 DE2435704A DE2435704A DE2435704C3 DE 2435704 C3 DE2435704 C3 DE 2435704C3 DE 2435704 A DE2435704 A DE 2435704A DE 2435704 A DE2435704 A DE 2435704A DE 2435704 C3 DE2435704 C3 DE 2435704C3
- Authority
- DE
- Germany
- Prior art keywords
- container
- dispersion
- sprayed
- spray
- hollow cone
- 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.)
- Expired
Links
- 239000006185 dispersion Substances 0.000 title claims description 93
- 238000000034 method Methods 0.000 title claims description 25
- 239000000178 monomer Substances 0.000 title claims description 24
- 230000008569 process Effects 0.000 title claims description 19
- BZHJMEDXRYGGRV-UHFFFAOYSA-N Vinyl chloride Chemical compound ClC=C BZHJMEDXRYGGRV-UHFFFAOYSA-N 0.000 title claims description 13
- 229920000642 polymer Polymers 0.000 title claims description 13
- 239000007921 spray Substances 0.000 claims description 32
- 239000007788 liquid Substances 0.000 claims description 26
- 238000005507 spraying Methods 0.000 claims description 18
- 239000002245 particle Substances 0.000 claims description 12
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 10
- 238000006116 polymerization reaction Methods 0.000 claims description 8
- 238000005496 tempering Methods 0.000 claims description 5
- 229920001577 copolymer Polymers 0.000 claims description 4
- 239000000126 substance Substances 0.000 claims description 4
- 239000000839 emulsion Substances 0.000 claims description 3
- 229920000578 graft copolymer Polymers 0.000 claims description 3
- 239000000463 material Substances 0.000 claims description 3
- 239000000725 suspension Substances 0.000 claims description 3
- 238000010438 heat treatment Methods 0.000 claims description 2
- 238000003756 stirring Methods 0.000 claims 2
- 229920000915 polyvinyl chloride Polymers 0.000 description 7
- 239000004800 polyvinyl chloride Substances 0.000 description 7
- 239000006260 foam Substances 0.000 description 6
- 238000001035 drying Methods 0.000 description 5
- 239000007789 gas Substances 0.000 description 5
- 239000000843 powder Substances 0.000 description 5
- 239000007787 solid Substances 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 238000007720 emulsion polymerization reaction Methods 0.000 description 3
- 239000011261 inert gas Substances 0.000 description 3
- 239000000203 mixture Substances 0.000 description 3
- 239000012071 phase Substances 0.000 description 3
- KAKZBPTYRLMSJV-UHFFFAOYSA-N Butadiene Chemical compound C=CC=C KAKZBPTYRLMSJV-UHFFFAOYSA-N 0.000 description 2
- PPBRXRYQALVLMV-UHFFFAOYSA-N Styrene Chemical compound C=CC1=CC=CC=C1 PPBRXRYQALVLMV-UHFFFAOYSA-N 0.000 description 2
- 230000002411 adverse Effects 0.000 description 2
- 238000009835 boiling Methods 0.000 description 2
- 238000000576 coating method Methods 0.000 description 2
- 238000007872 degassing Methods 0.000 description 2
- 239000007792 gaseous phase Substances 0.000 description 2
- 230000008642 heat stress Effects 0.000 description 2
- 229920003023 plastic Polymers 0.000 description 2
- 239000004033 plastic Substances 0.000 description 2
- 239000000047 product Substances 0.000 description 2
- NLHHRLWOUZZQLW-UHFFFAOYSA-N Acrylonitrile Chemical compound C=CC#N NLHHRLWOUZZQLW-UHFFFAOYSA-N 0.000 description 1
- 241000237942 Conidae Species 0.000 description 1
- QYKIQEUNHZKYBP-UHFFFAOYSA-N Vinyl ether Chemical compound C=COC=C QYKIQEUNHZKYBP-UHFFFAOYSA-N 0.000 description 1
- NIXOWILDQLNWCW-UHFFFAOYSA-N acrylic acid group Chemical group C(C=C)(=O)O NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000005119 centrifugation Methods 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 239000007795 chemical reaction product Substances 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 230000015271 coagulation Effects 0.000 description 1
- 238000005345 coagulation Methods 0.000 description 1
- 238000011109 contamination Methods 0.000 description 1
- 238000010924 continuous production Methods 0.000 description 1
- 239000002826 coolant Substances 0.000 description 1
- 238000009792 diffusion process Methods 0.000 description 1
- 239000004815 dispersion polymer Substances 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000001704 evaporation Methods 0.000 description 1
- 238000005187 foaming Methods 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 230000005802 health problem Effects 0.000 description 1
- 238000000265 homogenisation Methods 0.000 description 1
- 238000011031 large-scale manufacturing process Methods 0.000 description 1
- 125000005395 methacrylic acid group Chemical group 0.000 description 1
- 238000013021 overheating Methods 0.000 description 1
- 238000004806 packaging method and process Methods 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 230000002040 relaxant effect Effects 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
- 238000010557 suspension polymerization reaction Methods 0.000 description 1
- 230000008719 thickening Effects 0.000 description 1
- 229920002554 vinyl polymer Polymers 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
- C08F6/00—Post-polymerisation treatments
- C08F6/001—Removal of residual monomers by physical means
- C08F6/003—Removal of residual monomers by physical means from polymer solutions, suspensions, dispersions or emulsions without recovery of the polymer therefrom
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D1/00—Evaporating
- B01D1/16—Evaporating by spraying
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D3/00—Distillation or related exchange processes in which liquids are contacted with gaseous media, e.g. stripping
- B01D3/06—Flash distillation
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D3/00—Distillation or related exchange processes in which liquids are contacted with gaseous media, e.g. stripping
- B01D3/34—Distillation or related exchange processes in which liquids are contacted with gaseous media, e.g. stripping with one or more auxiliary substances
- B01D3/343—Distillation or related exchange processes in which liquids are contacted with gaseous media, e.g. stripping with one or more auxiliary substances the substance being a gas
- B01D3/346—Distillation or related exchange processes in which liquids are contacted with gaseous media, e.g. stripping with one or more auxiliary substances the substance being a gas the gas being used for removing vapours, e.g. transport gas
-
- 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
- B01J10/00—Chemical processes in general for reacting liquid with gaseous media other than in the presence of solid particles, or apparatus specially adapted therefor
- B01J10/02—Chemical processes in general for reacting liquid with gaseous media other than in the presence of solid particles, or apparatus specially adapted therefor of the thin-film type
-
- 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
- B01J19/00—Chemical, physical or physico-chemical processes in general; Their relevant apparatus
- B01J19/18—Stationary reactors having moving elements inside
- B01J19/1868—Stationary reactors having moving elements inside resulting in a loop-type movement
- B01J19/1881—Stationary reactors having moving elements inside resulting in a loop-type movement externally, i.e. the mixture leaving the vessel and subsequently re-entering it
-
- 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
- B01J2219/00—Chemical, physical or physico-chemical processes in general; Their relevant apparatus
- B01J2219/00049—Controlling or regulating processes
- B01J2219/00051—Controlling the temperature
- B01J2219/00074—Controlling the temperature by indirect heating or cooling employing heat exchange fluids
- B01J2219/00087—Controlling the temperature by indirect heating or cooling employing heat exchange fluids with heat exchange elements outside the reactor
- B01J2219/00094—Jackets
-
- 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
- B01J2219/00—Chemical, physical or physico-chemical processes in general; Their relevant apparatus
- B01J2219/00049—Controlling or regulating processes
- B01J2219/00051—Controlling the temperature
- B01J2219/00074—Controlling the temperature by indirect heating or cooling employing heat exchange fluids
- B01J2219/00087—Controlling the temperature by indirect heating or cooling employing heat exchange fluids with heat exchange elements outside the reactor
- B01J2219/00103—Controlling the temperature by indirect heating or cooling employing heat exchange fluids with heat exchange elements outside the reactor in a heat exchanger separate from the reactor
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Organic Chemistry (AREA)
- Dispersion Chemistry (AREA)
- Health & Medical Sciences (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Addition Polymer Or Copolymer, Post-Treatments, Or Chemical Modifications (AREA)
- Vaporization, Distillation, Condensation, Sublimation, And Cold Traps (AREA)
- Polymerisation Methods In General (AREA)
- Processes Of Treating Macromolecular Substances (AREA)
Priority Applications (19)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE2435704A DE2435704C3 (de) | 1974-07-25 | 1974-07-25 | Verfahren und Vorrichtung zur kontinuierlichen Entfernung von Restgehalten an Monomeren aus wäßrigen Dispersionen von Polymerisaten des Vinylchlorids |
ES439556A ES439556A1 (es) | 1974-07-25 | 1975-07-17 | Procedimiento y aparato para obtener dispersiones de polime-rizados con bajo contenido de monomeros. |
NLAANVRAGE7508630,A NL168848C (nl) | 1974-07-25 | 1975-07-18 | Werkwijze voor het verwijderen van restanten monomeer uit een waterige dispersie van vinylchloride-polymeren. |
SE7508274A SE420734B (sv) | 1974-07-25 | 1975-07-21 | Forfarande och anordning for kontinuerlig reducering av halten monomerer i despersioner av vinylkloridpolymerer |
CH959375A CH614962A5 (en) | 1974-07-25 | 1975-07-22 | Process and apparatus for continuous removal of monomers from polymer dispersions |
IT25691/75A IT1040006B (it) | 1974-07-25 | 1975-07-23 | Processo e apparecchio per la preparazione di dispersioni di polimero con basso contenuto di monomero |
GB30782/75A GB1508813A (en) | 1974-07-25 | 1975-07-23 | Process and device for the manufacture of polymer dispersions with low monomer content |
YU01888/75A YU39029B (en) | 1974-07-25 | 1975-07-24 | Device for continuously removing residues of monomeric materials from aqueous dispersions of vinyl chloride polymerisates |
CA232,194A CA1081880A (en) | 1974-07-25 | 1975-07-24 | Process and device for the manufacture of polymer dispersions with low monomer content |
JP50089699A JPS5137175A (ja) | 1974-07-25 | 1975-07-24 | |
FR7523097A FR2279766A1 (fr) | 1974-07-25 | 1975-07-24 | Procede et dispositif pour la preparation de dispersions de polymeres a basse teneur en monomeres |
AT572175A AT341772B (de) | 1974-07-25 | 1975-07-24 | Verfahren und vorrichtung zur herstellung von polymerisat-dispersionen mit niedrigem monomerengehalt |
ZA00754769A ZA754769B (en) | 1974-07-25 | 1975-07-24 | Process and device for the manufacture of polymer dispersions with low monomer content |
BE158619A BE831744A (fr) | 1974-07-25 | 1975-07-25 | Procede et dispositif pour la preparation de dispersions de polymeres a basse teneur en monomeres |
HU75HO1822A HU175479B (hu) | 1974-07-25 | 1975-07-25 | Sposob i apparat dlja poluchenija dispersijj vinil-khlorid-polimerov soderzhahhikh malo monomerov |
NL7607736A NL7607736A (nl) | 1974-07-25 | 1976-07-13 | Werkwijze en inrichting voor het bereiden van polymeerdispersies met een laag monomeerge- halte. |
FR7621930A FR2318176A2 (fr) | 1974-07-25 | 1976-07-19 | Procede et dispositif pour la preparation de dispersions de polymeres a basse teneur en monomeres |
US05/845,479 US4158092A (en) | 1974-07-25 | 1977-10-26 | Process for the manufacture of vinyl chloride polymer dispersions with a low monomer content |
YU1719/81A YU41460B (en) | 1974-07-25 | 1981-07-10 | Process for preparing polymer dispersions of a low manomer content |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE2435704A DE2435704C3 (de) | 1974-07-25 | 1974-07-25 | Verfahren und Vorrichtung zur kontinuierlichen Entfernung von Restgehalten an Monomeren aus wäßrigen Dispersionen von Polymerisaten des Vinylchlorids |
Publications (3)
Publication Number | Publication Date |
---|---|
DE2435704A1 DE2435704A1 (de) | 1976-02-05 |
DE2435704B2 DE2435704B2 (de) | 1979-09-27 |
DE2435704C3 true DE2435704C3 (de) | 1987-06-19 |
Family
ID=5921434
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DE2435704A Expired DE2435704C3 (de) | 1974-07-25 | 1974-07-25 | Verfahren und Vorrichtung zur kontinuierlichen Entfernung von Restgehalten an Monomeren aus wäßrigen Dispersionen von Polymerisaten des Vinylchlorids |
Country Status (15)
Country | Link |
---|---|
JP (1) | JPS5137175A (ja) |
AT (1) | AT341772B (ja) |
BE (1) | BE831744A (ja) |
CA (1) | CA1081880A (ja) |
CH (1) | CH614962A5 (ja) |
DE (1) | DE2435704C3 (ja) |
ES (1) | ES439556A1 (ja) |
FR (1) | FR2279766A1 (ja) |
GB (1) | GB1508813A (ja) |
HU (1) | HU175479B (ja) |
IT (1) | IT1040006B (ja) |
NL (1) | NL168848C (ja) |
SE (1) | SE420734B (ja) |
YU (2) | YU39029B (ja) |
ZA (1) | ZA754769B (ja) |
Families Citing this family (19)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
NL7607736A (nl) * | 1974-07-25 | 1977-01-20 | Hoechst Ag | Werkwijze en inrichting voor het bereiden van polymeerdispersies met een laag monomeerge- halte. |
JPS5128890A (ja) * | 1974-09-04 | 1976-03-11 | Mitsui Toatsu Chemicals | Mihannoenkabinirumonomaa no jokyohoho |
JPS5147075A (en) * | 1974-10-19 | 1976-04-22 | Shinetsu Chemical Co | Jugoshuryogono mihannotanryotaijokyohoho |
JPS51127187A (en) * | 1975-04-26 | 1976-11-05 | Kureha Chem Ind Co Ltd | A process and an apparatus for recovering monomers |
JPS52147689A (en) * | 1976-06-02 | 1977-12-08 | Mitsui Toatsu Chem Inc | Continuous removal of unreacted vinyl chloride monometer |
DE2701147C2 (de) * | 1977-01-13 | 1987-01-02 | Wacker-Chemie GmbH, 8000 München | Verfahren zur Herstellung von Vinylchlorid-Copolymerisaten mit niedrigem Restmonomergehalt |
DE2832972A1 (de) * | 1978-07-27 | 1980-02-07 | Wacker Chemie Gmbh | Verfahren zur druck- und restentgasung eines pvc-wasser-gemisches im polymerisationsautoklaven bei hoechstmoeglichem abscheidegrad des uebertriebs in einem nachgeschalteten abscheider und rueckfuehrung des uebertriebs zur restentgasung in den polymerisationsautoklaven |
IT1121511B (it) * | 1979-05-28 | 1986-04-02 | Montedison Spa | Procedimento per l'estrazione del cloruro di vinile monomero dai lattici di cloruro di polivinile ed apparecchiatura per la sua realizzazione |
GB2247415A (en) * | 1990-08-29 | 1992-03-04 | Shell Int Research | Discharge device for reducing foam |
DE19517680C2 (de) * | 1995-05-13 | 1997-06-12 | Buna Sow Leuna Olefinverb Gmbh | Verfahren zur Reduzierung der Schaumentwicklung |
NZ511502A (en) * | 2001-05-04 | 2002-03-01 | Wen Sen Shih | Two-chamber water distillation apparatus |
DE102011119341A1 (de) | 2011-11-25 | 2013-05-29 | Heraeus Quarzglas Gmbh & Co. Kg | Verfahren zur Herstellung von synthetischem Quarzglas nach der Sootmethode |
DE102011119374A1 (de) | 2011-11-25 | 2013-05-29 | Heraeus Quarzglas Gmbh & Co. Kg | Verfahren zur Herstellung von synthetischem Quarzglas |
DE102011119373A1 (de) | 2011-11-25 | 2013-05-29 | Heraeus Quarzglas Gmbh & Co. Kg | Verfahren zur Herstellung von synthetischem Quarzglas |
DE102011119339A1 (de) | 2011-11-25 | 2013-05-29 | Heraeus Quarzglas Gmbh & Co. Kg | Zerstäubungsverfahren zur Herstellung von synthetischem Quarzglas |
DE102013209673B3 (de) * | 2013-05-24 | 2014-05-22 | Heraeus Quarzglas Gmbh & Co. Kg | Verfahren und Verdampfer zur Herstellung von synthetischem Quarzglas |
DE102014115077A1 (de) * | 2014-10-16 | 2016-04-21 | Rvt Process Equipment Gmbh | Flüssigkeitsverteiler einer verfahrenstechnischen Kolonne |
JP7459871B2 (ja) | 2019-05-31 | 2024-04-02 | 株式会社レゾナック | クロロプレン系重合体ラテックスの製造方法 |
WO2020241252A1 (ja) * | 2019-05-31 | 2020-12-03 | 昭和電工株式会社 | 精製クロロプレン系重合体ラテックスの製造方法 |
Family Cites Families (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US1799467A (en) * | 1927-03-07 | 1931-04-07 | Thomas B Jarvies | Vapor-heating system |
NL79746C (ja) * | 1953-11-06 | |||
GB1090976A (en) * | 1964-02-12 | 1967-11-15 | Dunlop Rubber Co | Improvements in or relating to volatilization of residual liquid monomers |
DE1495177A1 (de) * | 1964-05-05 | 1969-03-13 | Basf Ag | Verfahren und Vorrichtung zum kontinuierlichen Entfernen fluechtiger Anteile aus Polyamiden |
BE709965A (ja) * | 1967-01-27 | 1968-05-30 | ||
JPS546269B1 (ja) * | 1970-12-18 | 1979-03-27 | ||
DE2130616A1 (de) * | 1971-06-21 | 1972-12-28 | Franz Froitzheim | Verfahren zum Verdampfen von Fluessigkeiten |
DE2259740C3 (de) * | 1972-12-04 | 1981-10-08 | Siemens AG, 1000 Berlin und 8000 München | Vorrichtung zum Entgasen von Flüssigkeiten |
-
1974
- 1974-07-25 DE DE2435704A patent/DE2435704C3/de not_active Expired
-
1975
- 1975-07-17 ES ES439556A patent/ES439556A1/es not_active Expired
- 1975-07-18 NL NLAANVRAGE7508630,A patent/NL168848C/xx not_active IP Right Cessation
- 1975-07-21 SE SE7508274A patent/SE420734B/xx not_active Application Discontinuation
- 1975-07-22 CH CH959375A patent/CH614962A5/xx not_active IP Right Cessation
- 1975-07-23 GB GB30782/75A patent/GB1508813A/en not_active Expired
- 1975-07-23 IT IT25691/75A patent/IT1040006B/it active
- 1975-07-24 YU YU01888/75A patent/YU39029B/xx unknown
- 1975-07-24 AT AT572175A patent/AT341772B/de not_active IP Right Cessation
- 1975-07-24 FR FR7523097A patent/FR2279766A1/fr active Granted
- 1975-07-24 CA CA232,194A patent/CA1081880A/en not_active Expired
- 1975-07-24 JP JP50089699A patent/JPS5137175A/ja active Pending
- 1975-07-24 ZA ZA00754769A patent/ZA754769B/xx unknown
- 1975-07-25 HU HU75HO1822A patent/HU175479B/hu unknown
- 1975-07-25 BE BE158619A patent/BE831744A/xx not_active IP Right Cessation
-
1981
- 1981-07-10 YU YU1719/81A patent/YU41460B/xx unknown
Also Published As
Publication number | Publication date |
---|---|
CH614962A5 (en) | 1979-12-28 |
GB1508813A (en) | 1978-04-26 |
BE831744A (fr) | 1976-01-26 |
SE7508274L (sv) | 1976-01-26 |
JPS5137175A (ja) | 1976-03-29 |
ES439556A1 (es) | 1977-02-16 |
NL168848B (nl) | 1981-12-16 |
ZA754769B (en) | 1976-08-25 |
FR2279766A1 (fr) | 1976-02-20 |
NL168848C (nl) | 1984-05-16 |
AT341772B (de) | 1978-02-27 |
YU41460B (en) | 1987-06-30 |
CA1081880A (en) | 1980-07-15 |
SE420734B (sv) | 1981-10-26 |
NL7508630A (nl) | 1976-01-27 |
FR2279766B1 (ja) | 1980-07-25 |
YU188875A (en) | 1982-05-31 |
DE2435704A1 (de) | 1976-02-05 |
ATA572175A (de) | 1977-06-15 |
YU171981A (en) | 1983-09-30 |
DE2435704B2 (de) | 1979-09-27 |
HU175479B (hu) | 1980-08-28 |
YU39029B (en) | 1984-02-29 |
IT1040006B (it) | 1979-12-20 |
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