DK173271B1 - Fremgangsmåde til kontinuerlig fremstilling af isopropylalkohol eller sek. butylalkohol - Google Patents
Fremgangsmåde til kontinuerlig fremstilling af isopropylalkohol eller sek. butylalkohol Download PDFInfo
- Publication number
- DK173271B1 DK173271B1 DK198502317A DK231785A DK173271B1 DK 173271 B1 DK173271 B1 DK 173271B1 DK 198502317 A DK198502317 A DK 198502317A DK 231785 A DK231785 A DK 231785A DK 173271 B1 DK173271 B1 DK 173271B1
- Authority
- DK
- Denmark
- Prior art keywords
- ether
- reactor
- hour
- reaction
- product
- Prior art date
Links
- KFZMGEQAYNKOFK-UHFFFAOYSA-N Isopropanol Chemical compound CC(C)O KFZMGEQAYNKOFK-UHFFFAOYSA-N 0.000 title claims abstract description 74
- BTANRVKWQNVYAZ-UHFFFAOYSA-N butan-2-ol Chemical compound CCC(C)O BTANRVKWQNVYAZ-UHFFFAOYSA-N 0.000 title claims abstract description 15
- 238000000034 method Methods 0.000 title claims abstract description 15
- 238000010924 continuous production Methods 0.000 title abstract description 5
- 238000006243 chemical reaction Methods 0.000 claims abstract description 19
- 239000006227 byproduct Substances 0.000 claims abstract description 4
- 239000007795 chemical reaction product Substances 0.000 claims abstract description 3
- RTZKZFJDLAIYFH-UHFFFAOYSA-N Diethyl ether Chemical compound CCOCC RTZKZFJDLAIYFH-UHFFFAOYSA-N 0.000 claims description 62
- 239000003054 catalyst Substances 0.000 claims description 23
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 13
- 230000002378 acidificating effect Effects 0.000 claims description 5
- 230000036571 hydration Effects 0.000 claims description 3
- 238000006703 hydration reaction Methods 0.000 claims description 3
- 230000003197 catalytic effect Effects 0.000 claims description 2
- 239000000376 reactant Substances 0.000 claims description 2
- 150000001336 alkenes Chemical class 0.000 abstract description 14
- JRZJOMJEPLMPRA-UHFFFAOYSA-N olefin Natural products CCCCCCCC=C JRZJOMJEPLMPRA-UHFFFAOYSA-N 0.000 abstract description 11
- 239000000047 product Substances 0.000 abstract description 9
- -1 aliphatic olefin Chemical class 0.000 abstract description 3
- 230000000887 hydrating effect Effects 0.000 abstract description 2
- 150000001983 dialkylethers Chemical class 0.000 abstract 1
- 239000011541 reaction mixture Substances 0.000 abstract 1
- SZNYYWIUQFZLLT-UHFFFAOYSA-N 2-methyl-1-(2-methylpropoxy)propane Chemical compound CC(C)COCC(C)C SZNYYWIUQFZLLT-UHFFFAOYSA-N 0.000 description 24
- ZAFNJMIOTHYJRJ-UHFFFAOYSA-N Diisopropyl ether Chemical compound CC(C)OC(C)C ZAFNJMIOTHYJRJ-UHFFFAOYSA-N 0.000 description 19
- 230000000052 comparative effect Effects 0.000 description 15
- 230000015572 biosynthetic process Effects 0.000 description 12
- 239000012074 organic phase Substances 0.000 description 8
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 7
- QQONPFPTGQHPMA-UHFFFAOYSA-N propylene Natural products CC=C QQONPFPTGQHPMA-UHFFFAOYSA-N 0.000 description 6
- 125000004805 propylene group Chemical group [H]C([H])([H])C([H])([*:1])C([H])([H])[*:2] 0.000 description 6
- 230000007306 turnover Effects 0.000 description 6
- VXNZUUAINFGPBY-UHFFFAOYSA-N 1-Butene Chemical class CCC=C VXNZUUAINFGPBY-UHFFFAOYSA-N 0.000 description 4
- 238000002474 experimental method Methods 0.000 description 4
- 239000008346 aqueous phase Substances 0.000 description 3
- 239000007788 liquid Substances 0.000 description 3
- 239000012071 phase Substances 0.000 description 3
- NWUYHJFMYQTDRP-UHFFFAOYSA-N 1,2-bis(ethenyl)benzene;1-ethenyl-2-ethylbenzene;styrene Chemical compound C=CC1=CC=CC=C1.CCC1=CC=CC=C1C=C.C=CC1=CC=CC=C1C=C NWUYHJFMYQTDRP-UHFFFAOYSA-N 0.000 description 2
- LSNNMFCWUKXFEE-UHFFFAOYSA-M Bisulfite Chemical compound OS([O-])=O LSNNMFCWUKXFEE-UHFFFAOYSA-M 0.000 description 2
- ATUOYWHBWRKTHZ-UHFFFAOYSA-N Propane Chemical compound CCC ATUOYWHBWRKTHZ-UHFFFAOYSA-N 0.000 description 2
- 150000001335 aliphatic alkanes Chemical class 0.000 description 2
- IAQRGUVFOMOMEM-UHFFFAOYSA-N butene Natural products CC=CC IAQRGUVFOMOMEM-UHFFFAOYSA-N 0.000 description 2
- 239000003729 cation exchange resin Substances 0.000 description 2
- 229920001429 chelating resin Polymers 0.000 description 2
- 238000003776 cleavage reaction Methods 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 230000007017 scission Effects 0.000 description 2
- 238000003786 synthesis reaction Methods 0.000 description 2
- 238000010626 work up procedure Methods 0.000 description 2
- 239000004215 Carbon black (E152) Substances 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 239000003377 acid catalyst Substances 0.000 description 1
- 150000007513 acids Chemical class 0.000 description 1
- 239000007864 aqueous solution Substances 0.000 description 1
- 239000000969 carrier Substances 0.000 description 1
- 238000003889 chemical engineering Methods 0.000 description 1
- 238000001944 continuous distillation Methods 0.000 description 1
- 238000005661 deetherification reaction Methods 0.000 description 1
- 150000002170 ethers Chemical class 0.000 description 1
- 229930195733 hydrocarbon Natural products 0.000 description 1
- 150000002430 hydrocarbons Chemical class 0.000 description 1
- 230000001771 impaired effect Effects 0.000 description 1
- 239000003456 ion exchange resin Substances 0.000 description 1
- 229920003303 ion-exchange polymer Polymers 0.000 description 1
- 230000014759 maintenance of location Effects 0.000 description 1
- 239000001294 propane Substances 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 150000003333 secondary alcohols Chemical class 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
- 230000001629 suppression Effects 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C29/00—Preparation of compounds having hydroxy or O-metal groups bound to a carbon atom not belonging to a six-membered aromatic ring
- C07C29/03—Preparation of compounds having hydroxy or O-metal groups bound to a carbon atom not belonging to a six-membered aromatic ring by addition of hydroxy groups to unsaturated carbon-to-carbon bonds, e.g. with the aid of H2O2
- C07C29/04—Preparation of compounds having hydroxy or O-metal groups bound to a carbon atom not belonging to a six-membered aromatic ring by addition of hydroxy groups to unsaturated carbon-to-carbon bonds, e.g. with the aid of H2O2 by hydration of carbon-to-carbon double bonds
-
- 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
- B01J8/00—Chemical or physical processes in general, conducted in the presence of fluids and solid particles; Apparatus for such processes
- B01J8/02—Chemical or physical processes in general, conducted in the presence of fluids and solid particles; Apparatus for such processes with stationary particles, e.g. in fixed beds
- B01J8/04—Chemical or physical processes in general, conducted in the presence of fluids and solid particles; Apparatus for such processes with stationary particles, e.g. in fixed beds the fluid passing successively through two or more beds
- B01J8/0446—Chemical or physical processes in general, conducted in the presence of fluids and solid particles; Apparatus for such processes with stationary particles, e.g. in fixed beds the fluid passing successively through two or more beds the flow within the beds being predominantly vertical
- B01J8/0449—Chemical or physical processes in general, conducted in the presence of fluids and solid particles; Apparatus for such processes with stationary particles, e.g. in fixed beds the fluid passing successively through two or more beds the flow within the beds being predominantly vertical in two or more cylindrical beds
- B01J8/0453—Chemical or physical processes in general, conducted in the presence of fluids and solid particles; Apparatus for such processes with stationary particles, e.g. in fixed beds the fluid passing successively through two or more beds the flow within the beds being predominantly vertical in two or more cylindrical beds the beds being superimposed one above the other
-
- 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
- B01J8/00—Chemical or physical processes in general, conducted in the presence of fluids and solid particles; Apparatus for such processes
- B01J8/02—Chemical or physical processes in general, conducted in the presence of fluids and solid particles; Apparatus for such processes with stationary particles, e.g. in fixed beds
- B01J8/04—Chemical or physical processes in general, conducted in the presence of fluids and solid particles; Apparatus for such processes with stationary particles, e.g. in fixed beds the fluid passing successively through two or more beds
- B01J8/0492—Feeding reactive fluids
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P20/00—Technologies relating to chemical industry
- Y02P20/50—Improvements relating to the production of bulk chemicals
- Y02P20/584—Recycling of catalysts
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
- Low-Molecular Organic Synthesis Reactions Using Catalysts (AREA)
- Preparation Of Compounds By Using Micro-Organisms (AREA)
- Acyclic And Carbocyclic Compounds In Medicinal Compositions (AREA)
- Medicines Containing Antibodies Or Antigens For Use As Internal Diagnostic Agents (AREA)
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE3419392 | 1984-05-24 | ||
| DE3419392A DE3419392C1 (de) | 1984-05-24 | 1984-05-24 | Verfahren zur kontinuierlichen Herstellung von Isopropylalkohol oder sek. Butylalkohol |
Publications (3)
| Publication Number | Publication Date |
|---|---|
| DK231785D0 DK231785D0 (da) | 1985-05-23 |
| DK231785A DK231785A (da) | 1985-11-25 |
| DK173271B1 true DK173271B1 (da) | 2000-06-05 |
Family
ID=6236759
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| DK198502317A DK173271B1 (da) | 1984-05-24 | 1985-05-23 | Fremgangsmåde til kontinuerlig fremstilling af isopropylalkohol eller sek. butylalkohol |
Country Status (19)
| Country | Link |
|---|---|
| US (1) | US4579984A (cs) |
| EP (1) | EP0162362B1 (cs) |
| JP (1) | JPS60260530A (cs) |
| AT (1) | ATE30711T1 (cs) |
| AU (1) | AU576243B2 (cs) |
| CA (1) | CA1246620A (cs) |
| CS (1) | CS266569B2 (cs) |
| DD (1) | DD234665A5 (cs) |
| DE (2) | DE3419392C1 (cs) |
| DK (1) | DK173271B1 (cs) |
| ES (1) | ES8603165A1 (cs) |
| FI (1) | FI82679C (cs) |
| IN (1) | IN164716B (cs) |
| NO (1) | NO159720C (cs) |
| PL (1) | PL145417B1 (cs) |
| RO (1) | RO91490B (cs) |
| SU (1) | SU1417792A3 (cs) |
| YU (1) | YU43595B (cs) |
| ZA (1) | ZA853297B (cs) |
Families Citing this family (30)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3512518A1 (de) * | 1985-04-06 | 1986-10-09 | Deutsche Texaco Ag, 2000 Hamburg | Verfahren zur kontinuierlichen herstellung von niederen alkoholen |
| DE3628007C1 (cs) * | 1986-08-19 | 1987-11-05 | Deutsche Texaco Ag, 2000 Hamburg, De | |
| AU598845B2 (en) * | 1986-08-19 | 1990-07-05 | Rwe-Dea Aktiengesellschaft Fur Mineraloel Und Chemie | Process for the production of isopropanol and tertiary alcohols with 4 to 5 carbon atoms |
| DE3628008C1 (cs) * | 1986-08-19 | 1987-11-05 | Deutsche Texaco Ag, 2000 Hamburg, De | |
| IN170837B (cs) * | 1987-11-17 | 1992-05-30 | Council Scient Ind Res | |
| US4935552A (en) * | 1989-01-12 | 1990-06-19 | Mobil Oil Corporation | Dual stage process for the production of ethers |
| EP0593475B1 (en) * | 1990-07-25 | 1997-05-28 | Mobil Oil Corporation | Reactor quenching for catalytic olefin hydration in ether production |
| US5162591A (en) * | 1990-07-25 | 1992-11-10 | Mobil Oil Corporation | Catalytic olefin hydration for ether production |
| US5444168A (en) * | 1994-05-16 | 1995-08-22 | Mobil Oil Corporation | Process for the production of symmetrical ethers from secondary alcohols |
| US5569789A (en) * | 1994-12-01 | 1996-10-29 | Mobil Oil Corporation | Multistage indirect propylene hydration process for the production of diisopropyl ether and isopropanol |
| CN1101799C (zh) * | 1999-12-13 | 2003-02-19 | 孙业茂 | 多段水循环树脂法制备仲丁醇工艺 |
| RU2211212C1 (ru) * | 2002-04-11 | 2003-08-27 | Закрытое акционерное общество фирма "Альен" | Способ получения изопропилового спирта |
| US20040236158A1 (en) * | 2003-05-20 | 2004-11-25 | Collin Jennifer Reichi | Methods, systems and catalysts for the hydration of olefins |
| US6887798B2 (en) | 2003-05-30 | 2005-05-03 | International Business Machines Corporation | STI stress modification by nitrogen plasma treatment for improving performance in small width devices |
| US7037794B2 (en) | 2004-06-09 | 2006-05-02 | International Business Machines Corporation | Raised STI process for multiple gate ox and sidewall protection on strained Si/SGOI structure with elevated source/drain |
| US6991998B2 (en) | 2004-07-02 | 2006-01-31 | International Business Machines Corporation | Ultra-thin, high quality strained silicon-on-insulator formed by elastic strain transfer |
| US7432553B2 (en) | 2005-01-19 | 2008-10-07 | International Business Machines Corporation | Structure and method to optimize strain in CMOSFETs |
| US7946907B2 (en) | 2005-04-20 | 2011-05-24 | Saint-Gobain Abrasives, Inc. | Saw blade gullet configuration |
| US7202513B1 (en) | 2005-09-29 | 2007-04-10 | International Business Machines Corporation | Stress engineering using dual pad nitride with selective SOI device architecture |
| RU2304137C1 (ru) * | 2006-03-14 | 2007-08-10 | Общество с ограниченной ответственностью "Тольяттикаучук" | Способ получения третичного бутилового спирта |
| RU2307823C1 (ru) * | 2006-03-14 | 2007-10-10 | Общество с ограниченной ответственностью "Тольяттикаучук" | Способ получения третичного бутилового спирта |
| RU2304138C1 (ru) * | 2006-03-14 | 2007-08-10 | Общество с ограниченной ответственностью "Тольяттикаучук" | Способ получения третичного бутилового спирта |
| WO2011014309A2 (en) * | 2009-07-30 | 2011-02-03 | Exxonmobil Chemical Patents Inc. | Olefin hydration process |
| US20110136926A1 (en) * | 2009-12-08 | 2011-06-09 | Jianguo Cai | Catalysts for Olefin Hydration and Method of Preparation |
| RU2453526C2 (ru) * | 2010-05-04 | 2012-06-20 | Общество с ограниченной ответственностью "Научно-производственное объединение ЕВРОХИМ" | Способ получения третичного бутилового спирта |
| US8558036B2 (en) | 2010-11-15 | 2013-10-15 | Saudi Arabian Oil Company | Dual phase catalysts system for mixed olefin hydrations |
| US8629080B2 (en) | 2011-03-21 | 2014-01-14 | Saudi Arabian Oil Company | Hydrated niobium oxide nanoparticle containing catalysts for olefin hydration |
| US8865950B2 (en) | 2011-08-10 | 2014-10-21 | Saudi Arabian Oil Company | Olefin hydration process with an integrated membrane reactor |
| RU2462447C1 (ru) * | 2011-08-26 | 2012-09-27 | Общество с ограниченной ответственностью "Научно-производственное объединение ЕВРОХИМ" | Способ получения третичного бутилового спирта |
| EP2788113B1 (en) | 2011-12-05 | 2019-05-08 | Saudi Arabian Oil Company | Hydrophilic membrane integrated olefin hydration process |
Family Cites Families (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE1065398B (cs) * | 1959-09-17 | |||
| US2533808A (en) * | 1950-12-12 | Manufacture of isopropyl alcohol | ||
| US2050445A (en) * | 1932-06-20 | 1936-08-11 | Air Reduction | Manufacture of ethyl alcohol |
| DE2233967A1 (de) * | 1972-07-11 | 1974-01-31 | Texaco Ag | Verfahren zur kontinuierlichen herstellung von niederen alkoholen, insbesondere isopropanol |
| DE2404329C3 (de) * | 1974-01-30 | 1981-03-19 | Deutsche Texaco Ag, 2000 Hamburg | Verfahren zur Befüllung und Inbetriebnahme bzw. Wiederinbetriebnahme einesals Rieselsäule ausgebildeten Festbettreaktors |
| DE2429770C3 (de) * | 1974-06-21 | 1981-04-16 | Deutsche Texaco Ag, 2000 Hamburg | Verfahren zur Herstellung von niederen Alkoholen durch direkte katalytische Hydratisierung niederer Olefine |
| US4087471A (en) * | 1977-05-20 | 1978-05-02 | Petro-Tex Chemical Corporation | Fixed bed process for the production of t-butanol |
| US4182920A (en) * | 1977-07-11 | 1980-01-08 | The Dow Chemical Company | Process for hydration of olefins to produce alcohols |
| DE2759237A1 (de) * | 1977-12-31 | 1979-07-12 | Huels Chemische Werke Ag | Verfahren zur herstellung von alkoholen mit 2 - 4 c-atomen durch katalytische hydratation von olefinen |
| DE3024146C2 (de) * | 1980-06-27 | 1983-07-21 | Deutsche Texaco Ag, 2000 Hamburg | Verfahren zur kontinuierlichen Herstellung von Alkoholen mit 3 bis 5 Kohlenstoffatomen |
| US4405822A (en) * | 1981-10-30 | 1983-09-20 | Chevron Research Company | Diisopropyl ether hydration in isopropanol production |
| US4352945A (en) * | 1981-10-30 | 1982-10-05 | Chevron Research Company | Diisopropyl ether reversion in isopropanol production |
| DE3336644A1 (de) * | 1983-10-08 | 1985-05-23 | Deutsche Texaco Ag, 2000 Hamburg | Verfahren zur kontinuierlichen herstellung von alkoholen |
| DE3512518A1 (de) * | 1985-04-06 | 1986-10-09 | Deutsche Texaco Ag, 2000 Hamburg | Verfahren zur kontinuierlichen herstellung von niederen alkoholen |
-
1984
- 1984-05-24 DE DE3419392A patent/DE3419392C1/de not_active Expired
-
1985
- 1985-04-11 US US06/722,041 patent/US4579984A/en not_active Expired - Lifetime
- 1985-04-29 FI FI851681A patent/FI82679C/fi not_active IP Right Cessation
- 1985-05-02 ZA ZA853297A patent/ZA853297B/xx unknown
- 1985-05-04 DE DE8585105471T patent/DE3560944D1/de not_active Expired
- 1985-05-04 AT AT85105471T patent/ATE30711T1/de not_active IP Right Cessation
- 1985-05-04 EP EP85105471A patent/EP0162362B1/de not_active Expired
- 1985-05-09 CA CA000481127A patent/CA1246620A/en not_active Expired
- 1985-05-10 ES ES543053A patent/ES8603165A1/es not_active Expired
- 1985-05-13 CS CS853408A patent/CS266569B2/cs unknown
- 1985-05-16 SU SU853891175A patent/SU1417792A3/ru active
- 1985-05-17 IN IN369/MAS/85A patent/IN164716B/en unknown
- 1985-05-20 NO NO852001A patent/NO159720C/no not_active IP Right Cessation
- 1985-05-20 AU AU42647/85A patent/AU576243B2/en not_active Ceased
- 1985-05-21 RO RO118825A patent/RO91490B/ro unknown
- 1985-05-21 JP JP60107083A patent/JPS60260530A/ja active Granted
- 1985-05-21 YU YU848/85A patent/YU43595B/xx unknown
- 1985-05-22 DD DD85276587A patent/DD234665A5/de not_active IP Right Cessation
- 1985-05-23 PL PL1985253569A patent/PL145417B1/pl unknown
- 1985-05-23 DK DK198502317A patent/DK173271B1/da not_active IP Right Cessation
Also Published As
| Publication number | Publication date |
|---|---|
| FI851681L (fi) | 1985-11-25 |
| PL145417B1 (en) | 1988-09-30 |
| DK231785D0 (da) | 1985-05-23 |
| US4579984A (en) | 1986-04-01 |
| FI851681A0 (fi) | 1985-04-29 |
| ATE30711T1 (de) | 1987-11-15 |
| EP0162362A1 (de) | 1985-11-27 |
| ZA853297B (en) | 1985-12-24 |
| AU576243B2 (en) | 1988-08-18 |
| NO159720C (no) | 1989-02-01 |
| AU4264785A (en) | 1985-11-28 |
| ES543053A0 (es) | 1986-01-01 |
| JPH0118061B2 (cs) | 1989-04-03 |
| RO91490A (ro) | 1987-04-30 |
| IN164716B (cs) | 1989-05-13 |
| YU84885A (en) | 1987-06-30 |
| CS266569B2 (en) | 1990-01-12 |
| DE3419392C1 (de) | 1985-12-05 |
| EP0162362B1 (de) | 1987-11-11 |
| DD234665A5 (de) | 1986-04-09 |
| NO852001L (no) | 1985-11-25 |
| CS340885A2 (en) | 1989-04-14 |
| PL253569A1 (en) | 1986-02-11 |
| DE3560944D1 (en) | 1987-12-17 |
| FI82679B (fi) | 1990-12-31 |
| NO159720B (no) | 1988-10-24 |
| DK231785A (da) | 1985-11-25 |
| SU1417792A3 (ru) | 1988-08-15 |
| RO91490B (ro) | 1987-05-01 |
| CA1246620A (en) | 1988-12-13 |
| FI82679C (fi) | 1991-04-10 |
| ES8603165A1 (es) | 1986-01-01 |
| JPS60260530A (ja) | 1985-12-23 |
| YU43595B (en) | 1989-08-31 |
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