PL104357B1 - Sposob odzyskiwania tlenku etylenu - Google Patents
Sposob odzyskiwania tlenku etylenu Download PDFInfo
- Publication number
- PL104357B1 PL104357B1 PL1976188098A PL18809876A PL104357B1 PL 104357 B1 PL104357 B1 PL 104357B1 PL 1976188098 A PL1976188098 A PL 1976188098A PL 18809876 A PL18809876 A PL 18809876A PL 104357 B1 PL104357 B1 PL 104357B1
- Authority
- PL
- Poland
- Prior art keywords
- column
- reabsorption
- desorption
- reabsorbate
- ethylene oxide
- Prior art date
Links
- IAYPIBMASNFSPL-UHFFFAOYSA-N Ethylene oxide Chemical compound C1CO1 IAYPIBMASNFSPL-UHFFFAOYSA-N 0.000 title claims description 60
- 238000000034 method Methods 0.000 title claims description 36
- 238000003795 desorption Methods 0.000 claims description 94
- 230000009103 reabsorption Effects 0.000 claims description 69
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 47
- LYCAIKOWRPUZTN-UHFFFAOYSA-N Ethylene glycol Chemical compound OCCO LYCAIKOWRPUZTN-UHFFFAOYSA-N 0.000 claims description 35
- 230000008569 process Effects 0.000 claims description 27
- CURLTUGMZLYLDI-UHFFFAOYSA-N carbon dioxide Natural products O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 claims description 26
- 239000007789 gas Substances 0.000 claims description 24
- VGGSQFUCUMXWEO-UHFFFAOYSA-N Ethene Chemical compound C=C VGGSQFUCUMXWEO-UHFFFAOYSA-N 0.000 claims description 20
- 239000005977 Ethylene Substances 0.000 claims description 20
- 230000009102 absorption Effects 0.000 claims description 15
- 238000010521 absorption reaction Methods 0.000 claims description 15
- 229910002092 carbon dioxide Inorganic materials 0.000 claims description 15
- 238000006243 chemical reaction Methods 0.000 claims description 14
- 239000007788 liquid Substances 0.000 claims description 14
- 238000009833 condensation Methods 0.000 claims description 13
- 230000005494 condensation Effects 0.000 claims description 13
- 239000000203 mixture Substances 0.000 claims description 12
- 239000012535 impurity Substances 0.000 claims description 10
- 238000007254 oxidation reaction Methods 0.000 claims description 8
- 238000011084 recovery Methods 0.000 claims description 8
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims description 7
- 239000004020 conductor Substances 0.000 claims description 7
- WGCNASOHLSPBMP-UHFFFAOYSA-N hydroxyacetaldehyde Natural products OCC=O WGCNASOHLSPBMP-UHFFFAOYSA-N 0.000 claims description 7
- 239000001301 oxygen Substances 0.000 claims description 7
- 229910052760 oxygen Inorganic materials 0.000 claims description 7
- 238000012545 processing Methods 0.000 claims description 7
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 claims description 6
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 6
- 239000002253 acid Substances 0.000 claims description 6
- 230000008901 benefit Effects 0.000 claims description 6
- 230000015572 biosynthetic process Effects 0.000 claims description 6
- 230000003647 oxidation Effects 0.000 claims description 6
- 238000001179 sorption measurement Methods 0.000 claims description 6
- 239000002912 waste gas Substances 0.000 claims description 6
- MYMOFIZGZYHOMD-UHFFFAOYSA-N Dioxygen Chemical compound O=O MYMOFIZGZYHOMD-UHFFFAOYSA-N 0.000 claims description 5
- 150000007513 acids Chemical class 0.000 claims description 5
- 238000001816 cooling Methods 0.000 claims description 5
- 229910001882 dioxygen Inorganic materials 0.000 claims description 5
- 230000036571 hydration Effects 0.000 claims description 5
- 238000006703 hydration reaction Methods 0.000 claims description 5
- RTZKZFJDLAIYFH-UHFFFAOYSA-N Diethyl ether Chemical compound CCOCC RTZKZFJDLAIYFH-UHFFFAOYSA-N 0.000 claims description 4
- 239000002250 absorbent Substances 0.000 claims description 4
- 230000002745 absorbent Effects 0.000 claims description 4
- 238000010586 diagram Methods 0.000 claims description 4
- 230000002349 favourable effect Effects 0.000 claims description 4
- 229910052709 silver Inorganic materials 0.000 claims description 4
- 239000004332 silver Substances 0.000 claims description 4
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 claims description 3
- OTMSDBZUPAUEDD-UHFFFAOYSA-N Ethane Chemical compound CC OTMSDBZUPAUEDD-UHFFFAOYSA-N 0.000 claims description 3
- 239000006096 absorbing agent Substances 0.000 claims description 3
- 229910052786 argon Inorganic materials 0.000 claims description 3
- 230000004048 modification Effects 0.000 claims description 3
- 238000012986 modification Methods 0.000 claims description 3
- 229910052757 nitrogen Inorganic materials 0.000 claims description 3
- 239000000454 talc Substances 0.000 claims description 3
- 229910052623 talc Inorganic materials 0.000 claims description 3
- 229910002091 carbon monoxide Inorganic materials 0.000 claims description 2
- 239000003546 flue gas Substances 0.000 claims description 2
- 239000012530 fluid Substances 0.000 claims description 2
- 238000009283 thermal hydrolysis Methods 0.000 claims description 2
- QTBSBXVTEAMEQO-UHFFFAOYSA-N Acetic acid Chemical compound CC(O)=O QTBSBXVTEAMEQO-UHFFFAOYSA-N 0.000 claims 6
- 239000003344 environmental pollutant Substances 0.000 claims 5
- 231100000719 pollutant Toxicity 0.000 claims 5
- 230000000052 comparative effect Effects 0.000 claims 4
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 claims 4
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 claims 3
- 150000001299 aldehydes Chemical class 0.000 claims 3
- 239000003054 catalyst Substances 0.000 claims 3
- NNYANBOETKCDHT-UHFFFAOYSA-N carbon dioxide;oxirane Chemical compound C1CO1.O=C=O NNYANBOETKCDHT-UHFFFAOYSA-N 0.000 claims 2
- 239000013256 coordination polymer Substances 0.000 claims 2
- 241000721701 Lynx Species 0.000 claims 1
- 229910000805 Pig iron Inorganic materials 0.000 claims 1
- 239000003463 adsorbent Substances 0.000 claims 1
- 238000004140 cleaning Methods 0.000 claims 1
- 238000004581 coalescence Methods 0.000 claims 1
- 230000001054 cortical effect Effects 0.000 claims 1
- AEDZKIACDBYJLQ-UHFFFAOYSA-N ethane-1,2-diol;hydrate Chemical compound O.OCCO AEDZKIACDBYJLQ-UHFFFAOYSA-N 0.000 claims 1
- 230000004907 flux Effects 0.000 claims 1
- 239000011521 glass Substances 0.000 claims 1
- 150000002894 organic compounds Chemical class 0.000 claims 1
- 238000004886 process control Methods 0.000 claims 1
- 229940002612 prodrug Drugs 0.000 claims 1
- 239000000651 prodrug Substances 0.000 claims 1
- 238000000746 purification Methods 0.000 claims 1
- 238000003786 synthesis reaction Methods 0.000 claims 1
- 239000000047 product Substances 0.000 description 14
- 239000000243 solution Substances 0.000 description 12
- 239000001569 carbon dioxide Substances 0.000 description 7
- 238000004519 manufacturing process Methods 0.000 description 5
- 239000012071 phase Substances 0.000 description 5
- 239000000126 substance Substances 0.000 description 5
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 4
- 229910052799 carbon Inorganic materials 0.000 description 4
- WSWCOQWTEOXDQX-MQQKCMAXSA-M (E,E)-sorbate Chemical compound C\C=C\C=C\C([O-])=O WSWCOQWTEOXDQX-MQQKCMAXSA-M 0.000 description 3
- 241000208202 Linaceae Species 0.000 description 3
- 235000004431 Linum usitatissimum Nutrition 0.000 description 3
- 125000002485 formyl group Chemical class [H]C(*)=O 0.000 description 3
- 239000003517 fume Substances 0.000 description 3
- -1 however Chemical compound 0.000 description 3
- 229940075554 sorbate Drugs 0.000 description 3
- 238000011109 contamination Methods 0.000 description 2
- 239000002826 coolant Substances 0.000 description 2
- 239000003085 diluting agent Substances 0.000 description 2
- HHFAWKCIHAUFRX-UHFFFAOYSA-N ethoxide Chemical compound CC[O-] HHFAWKCIHAUFRX-UHFFFAOYSA-N 0.000 description 2
- 150000002334 glycols Chemical class 0.000 description 2
- 239000007791 liquid phase Substances 0.000 description 2
- 238000010992 reflux Methods 0.000 description 2
- 241001292396 Cirrhitidae Species 0.000 description 1
- 101000983970 Conus catus Alpha-conotoxin CIB Proteins 0.000 description 1
- 241000938605 Crocodylia Species 0.000 description 1
- 241000283086 Equidae Species 0.000 description 1
- 241001465754 Metazoa Species 0.000 description 1
- 240000004713 Pisum sativum Species 0.000 description 1
- 235000010582 Pisum sativum Nutrition 0.000 description 1
- 229920000297 Rayon Polymers 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- 229910045601 alloy Inorganic materials 0.000 description 1
- 230000004075 alteration Effects 0.000 description 1
- 239000006227 byproduct Substances 0.000 description 1
- 238000006555 catalytic reaction Methods 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 230000003749 cleanliness Effects 0.000 description 1
- 238000012790 confirmation Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 239000000356 contaminant Substances 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
- 239000000835 fiber Substances 0.000 description 1
- 238000011049 filling Methods 0.000 description 1
- 238000007710 freezing Methods 0.000 description 1
- 230000008014 freezing Effects 0.000 description 1
- 230000004313 glare Effects 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000011065 in-situ storage Methods 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 238000006213 oxygenation reaction Methods 0.000 description 1
- 239000002957 persistent organic pollutant Substances 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 239000002964 rayon Substances 0.000 description 1
- 239000012495 reaction gas Substances 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 238000009419 refurbishment Methods 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 238000009331 sowing Methods 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
- 239000002023 wood Substances 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07D—HETEROCYCLIC COMPOUNDS
- C07D301/00—Preparation of oxiranes
- C07D301/32—Separation; Purification
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Epoxy Compounds (AREA)
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
- Physical Or Chemical Processes And Apparatus (AREA)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US05/561,515 US3964980A (en) | 1975-03-24 | 1975-03-24 | Process for the recovery of ethylene oxide |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| PL104357B1 true PL104357B1 (pl) | 1979-08-31 |
Family
ID=24242293
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PL1976188098A PL104357B1 (pl) | 1975-03-24 | 1976-03-19 | Sposob odzyskiwania tlenku etylenu |
Country Status (23)
| Country | Link |
|---|---|
| US (1) | US3964980A (en]) |
| JP (1) | JPS51118709A (en]) |
| AR (1) | AR208365A1 (en]) |
| AU (1) | AU498179B2 (en]) |
| BE (1) | BE839881A (en]) |
| BG (1) | BG39112A3 (en]) |
| BR (1) | BR7601769A (en]) |
| CA (1) | CA1080239A (en]) |
| DD (1) | DD124475A5 (en]) |
| DE (1) | DE2612540C3 (en]) |
| EG (1) | EG12464A (en]) |
| ES (1) | ES446306A1 (en]) |
| FR (1) | FR2305436A1 (en]) |
| GB (1) | GB1539889A (en]) |
| IN (1) | IN145102B (en]) |
| IT (1) | IT1058031B (en]) |
| NL (1) | NL170001C (en]) |
| PL (1) | PL104357B1 (en]) |
| RO (1) | RO72229A (en]) |
| SE (1) | SE425851B (en]) |
| SU (1) | SU831076A3 (en]) |
| TR (1) | TR18887A (en]) |
| ZA (1) | ZA761783B (en]) |
Families Citing this family (37)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5230264A (en) * | 1975-09-02 | 1977-03-07 | Godo Shigen Sangyo Kk | Perpendicularly intersecting current diffusing and absorbing apparatus |
| US4437939A (en) | 1981-07-17 | 1984-03-20 | The Halcon Sd Group, Inc. | Process for separating ethylene oxide from aqueous solutions |
| US4437938A (en) | 1981-07-17 | 1984-03-20 | The Halcon Sd Group, Inc. | Process for recovering ethylene oxide from aqueous solutions |
| SE8302611L (sv) * | 1983-05-06 | 1984-11-07 | Gambro Lundia Ab | Forfarande och anleggning for atervinning av en eller flera bestandsdelar ur en gasblandning |
| US4508927A (en) * | 1983-08-02 | 1985-04-02 | The Halcon Sd Group, Inc. | Preparation of glycols from ethylene oxide |
| FR2553771B1 (fr) * | 1983-10-19 | 1986-01-17 | Atochem | Procede et dispositif pour concentrer des solutions aqueuses d'oxyde d'ethylene |
| US4556748A (en) * | 1983-10-31 | 1985-12-03 | The Dow Chemical Company | Process for producing alkylene glycols |
| FR2558069B1 (fr) * | 1984-01-17 | 1986-04-25 | Atochem | Procede d'elimination de gaz dissous dans une solution aqueuse d'oxyde d'ethylene |
| FR2572403B1 (fr) * | 1984-10-31 | 1988-07-29 | Atochem | Procede pour concentrer des solutions aqueuses diluees d'oxyde d'ethylene |
| DE3504032A1 (de) * | 1985-02-06 | 1986-08-07 | Linde Ag, 6200 Wiesbaden | Verfahren zur regenerierung eines beladenen waschmittels |
| CA1284334C (en) | 1985-06-27 | 1991-05-21 | Masayuki Sawada | Method for recovery of ethylene oxide |
| EP0207490B1 (en) * | 1985-07-03 | 1991-04-24 | Nippon Shokubai Kagaku Kogyo Co., Ltd | Method for purification of ethylene oxide |
| US5529667A (en) * | 1994-12-01 | 1996-06-25 | Hoechst Celanese Corporation | Process for recovering ethylene oxide |
| DE19843721A1 (de) * | 1998-09-23 | 2000-03-30 | Basf Ag | Verfahren zur kontinuierlichen Herstellung einer wässrigen Ethylenoxid-Lösung |
| JP2001031600A (ja) * | 1999-07-14 | 2001-02-06 | Nippon Shokubai Co Ltd | 高純度モノエチレングリコールの製法 |
| US6437199B1 (en) * | 1999-07-14 | 2002-08-20 | Nippon Shokubai Co., Ltd. | Method for production of high-purity monoethylene glycol |
| JP2001031601A (ja) * | 1999-07-14 | 2001-02-06 | Nippon Shokubai Co Ltd | 高純度モノエチレングリコールの製造方法 |
| US6395913B1 (en) | 2001-07-20 | 2002-05-28 | Eastman Chemical Company | Recovery and purification of 3,4-epoxy-1-butene |
| US6500970B1 (en) | 2001-07-20 | 2002-12-31 | Eastman Chemical Company | Recovery and purification of 3,4-epoxy-1-butene using high-boiling solvents |
| US6596882B2 (en) | 2001-07-20 | 2003-07-22 | Eastman Chemical Company | Recovery and purification of 3,4-epoxy-1-butene using water-miscible solvents |
| US7404834B2 (en) * | 2005-02-11 | 2008-07-29 | Sd Lizenzverwertungsgesellschaft Mbh & Co. Kg Lenbachplatz 6 | Ethylene oxide plant operation |
| PE20070158A1 (es) * | 2005-05-10 | 2007-03-02 | Shell Int Research | Proceso y dispositivo para recuperar oxido de etileno de un absorbente graso |
| US20070154377A1 (en) * | 2005-12-22 | 2007-07-05 | Rekers Dominicus M | Process for the removal of combustible volatile contaminant materials from a process stream |
| US8268238B2 (en) * | 2006-09-29 | 2012-09-18 | Tyco Healthcare Group Lp | System and method for recycling sterilant gas |
| US7666369B2 (en) * | 2006-09-29 | 2010-02-23 | Tyco Healthcare Group Lp | System and method for recycling sterilant gas |
| AR064958A1 (es) * | 2007-01-22 | 2009-05-06 | Shell Int Research | Procesos para la produccion de oxido de etileno y glicol de etileno |
| JP5054765B2 (ja) * | 2007-04-17 | 2012-10-24 | アークレイ株式会社 | 基質濃度測定方法および基質濃度測定装置 |
| RU2466123C2 (ru) * | 2007-08-14 | 2012-11-10 | Шелл Интернэшнл Рисерч Маатсхаппий Б.В. | Способ получения алкиленгликоля |
| WO2009094103A1 (en) | 2008-01-25 | 2009-07-30 | Dow Technology Investments Llc | Reflux condenser |
| US7569710B1 (en) | 2008-02-23 | 2009-08-04 | Brian Ozero | Ethylene oxide recovery process |
| US8053586B2 (en) * | 2008-07-31 | 2011-11-08 | Dow Technology Investments Llc | Alkylene oxide recovery systems |
| CA2718046C (en) * | 2008-07-31 | 2012-01-03 | Dow Technology Investments Llc | Alkylene oxide recovery systems |
| JP5828793B2 (ja) * | 2012-03-30 | 2015-12-09 | 株式会社日本触媒 | エチレンオキシドの製造プロセスにおける炭酸ガスの回収方法 |
| JP6391913B2 (ja) * | 2013-03-29 | 2018-09-19 | 株式会社日本触媒 | エチレンオキシドの製造方法 |
| JP6522078B2 (ja) * | 2017-11-01 | 2019-05-29 | 株式会社日本触媒 | エチレンオキシドの製造方法 |
| US10738020B2 (en) * | 2017-11-22 | 2020-08-11 | Joseph D. Duff | Recovery of ethylene oxide from sterilization process |
| US11932615B2 (en) | 2018-06-04 | 2024-03-19 | Brian Ozero | Method for recovery of ethylene oxide |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3174262A (en) * | 1965-03-23 | Chemical process and apparatus for recovery of ethylene oxide | ||
| US3165539A (en) * | 1960-07-08 | 1965-01-12 | Halcon International Inc | Recovery of ethylene oxide from a liquid mixture thereof with normally gaseous impurities |
| US3418338A (en) * | 1966-02-28 | 1968-12-24 | Halcon International Inc | Water extractive distillation of an ethylene oxide stream containing formaldehyde |
| US3523957A (en) * | 1966-12-07 | 1970-08-11 | Lummus Co | Process for producing an olefinic oxide |
| US3745092A (en) * | 1971-01-11 | 1973-07-10 | Shell Oil Co | Recovery and purification of ethylene oxide by distillation and absorption |
| US3729899A (en) * | 1971-06-23 | 1973-05-01 | Shell Oil Co | Recovery of ethylene oxide from admixed inert gaseous components |
| BE789308A (fr) * | 1971-10-04 | 1973-03-27 | Shell Int Research | Terige oplossingen van etheenoxyde werkwijze voor het concentreren en zuiveren van wa |
-
1975
- 1975-03-24 US US05/561,515 patent/US3964980A/en not_active Expired - Lifetime
-
1976
- 1976-01-01 AR AR262640A patent/AR208365A1/es active
- 1976-02-24 SE SE7602214A patent/SE425851B/xx not_active IP Right Cessation
- 1976-02-25 IN IN336/CAL/76A patent/IN145102B/en unknown
- 1976-03-15 NL NLAANVRAGE7602675,A patent/NL170001C/xx not_active IP Right Cessation
- 1976-03-16 FR FR7607430A patent/FR2305436A1/fr active Granted
- 1976-03-17 RO RO7685146A patent/RO72229A/ro unknown
- 1976-03-18 DD DD191918A patent/DD124475A5/xx unknown
- 1976-03-18 BG BG032651A patent/BG39112A3/xx unknown
- 1976-03-18 AU AU12126/76A patent/AU498179B2/en not_active Expired
- 1976-03-18 SU SU762337307A patent/SU831076A3/ru active
- 1976-03-19 PL PL1976188098A patent/PL104357B1/pl unknown
- 1976-03-19 TR TR18887A patent/TR18887A/xx unknown
- 1976-03-21 EG EG169/76A patent/EG12464A/xx active
- 1976-03-22 BE BE165438A patent/BE839881A/xx not_active IP Right Cessation
- 1976-03-22 CA CA248,455A patent/CA1080239A/en not_active Expired
- 1976-03-23 BR BR7601769A patent/BR7601769A/pt unknown
- 1976-03-23 IT IT48687/76A patent/IT1058031B/it active
- 1976-03-24 ES ES446306A patent/ES446306A1/es not_active Expired
- 1976-03-24 ZA ZA761783A patent/ZA761783B/xx unknown
- 1976-03-24 DE DE2612540A patent/DE2612540C3/de not_active Expired
- 1976-03-24 GB GB11867/76A patent/GB1539889A/en not_active Expired
- 1976-03-24 JP JP51032404A patent/JPS51118709A/ja active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| SE7602214L (sv) | 1976-09-25 |
| AR208365A1 (es) | 1976-12-20 |
| SU831076A3 (ru) | 1981-05-15 |
| ZA761783B (en) | 1977-10-26 |
| TR18887A (tr) | 1977-11-10 |
| FR2305436B1 (en]) | 1978-10-13 |
| NL170001B (nl) | 1982-04-16 |
| AU1212676A (en) | 1977-09-22 |
| ES446306A1 (es) | 1977-06-16 |
| DE2612540B2 (de) | 1980-05-22 |
| CA1080239A (en) | 1980-06-24 |
| SE425851B (sv) | 1982-11-15 |
| DE2612540A1 (de) | 1976-10-14 |
| JPS51118709A (en) | 1976-10-18 |
| EG12464A (en) | 1981-03-31 |
| GB1539889A (en) | 1979-02-07 |
| FR2305436A1 (fr) | 1976-10-22 |
| NL7602675A (nl) | 1976-09-28 |
| JPS54882B2 (en]) | 1979-01-18 |
| RO72229A (ro) | 1981-08-30 |
| US3964980A (en) | 1976-06-22 |
| IT1058031B (it) | 1982-04-10 |
| NL170001C (nl) | 1982-09-16 |
| IN145102B (en]) | 1978-08-26 |
| AU498179B2 (en) | 1979-02-15 |
| BR7601769A (pt) | 1976-09-21 |
| BE839881A (fr) | 1976-09-22 |
| BG39112A3 (en) | 1986-04-15 |
| DD124475A5 (de) | 1977-02-23 |
| DE2612540C3 (de) | 1981-02-12 |
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