IT1210012B - Punto di ebollizione. procedimento e impianto di liquefazione di un gas a basso - Google Patents

Punto di ebollizione. procedimento e impianto di liquefazione di un gas a basso

Info

Publication number
IT1210012B
IT1210012B IT8046911A IT4691180A IT1210012B IT 1210012 B IT1210012 B IT 1210012B IT 8046911 A IT8046911 A IT 8046911A IT 4691180 A IT4691180 A IT 4691180A IT 1210012 B IT1210012 B IT 1210012B
Authority
IT
Italy
Prior art keywords
liquefation
plant
boiling point
low gas
gas
Prior art date
Application number
IT8046911A
Other languages
English (en)
Italian (it)
Other versions
IT8046911A0 (it
Inventor
Henri Paradowski
Enzo Caetani
Original Assignee
Technip Cie
Snam Progetti
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Technip Cie, Snam Progetti filed Critical Technip Cie
Publication of IT8046911A0 publication Critical patent/IT8046911A0/it
Application granted granted Critical
Publication of IT1210012B publication Critical patent/IT1210012B/it

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25J—LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
    • F25J1/00—Processes or apparatus for liquefying or solidifying gases or gaseous mixtures
    • F25J1/02—Processes or apparatus for liquefying or solidifying gases or gaseous mixtures requiring the use of refrigeration, e.g. of helium or hydrogen ; Details and kind of the refrigeration system used; Integration with other units or processes; Controlling aspects of the process
    • F25J1/0243—Start-up or control of the process; Details of the apparatus used; Details of the refrigerant compression system used
    • F25J1/0257—Construction and layout of liquefaction equipments, e.g. valves, machines
    • F25J1/0262—Details of the cold heat exchange system
    • F25J1/0264—Arrangement of heat exchanger cores in parallel with different functions, e.g. different cooling streams
    • F25J1/0265—Arrangement of heat exchanger cores in parallel with different functions, e.g. different cooling streams comprising cores associated exclusively with the cooling of a refrigerant stream, e.g. for auto-refrigeration or economizer
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25J—LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
    • F25J1/00—Processes or apparatus for liquefying or solidifying gases or gaseous mixtures
    • F25J1/0002—Processes or apparatus for liquefying or solidifying gases or gaseous mixtures characterised by the fluid to be liquefied
    • F25J1/0022—Hydrocarbons, e.g. natural gas
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25J—LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
    • F25J1/00—Processes or apparatus for liquefying or solidifying gases or gaseous mixtures
    • F25J1/003—Processes or apparatus for liquefying or solidifying gases or gaseous mixtures characterised by the kind of cold generation within the liquefaction unit for compensating heat leaks and liquid production
    • F25J1/0047—Processes or apparatus for liquefying or solidifying gases or gaseous mixtures characterised by the kind of cold generation within the liquefaction unit for compensating heat leaks and liquid production using an "external" refrigerant stream in a closed vapor compression cycle
    • F25J1/0052—Processes or apparatus for liquefying or solidifying gases or gaseous mixtures characterised by the kind of cold generation within the liquefaction unit for compensating heat leaks and liquid production using an "external" refrigerant stream in a closed vapor compression cycle by vaporising a liquid refrigerant stream
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25J—LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
    • F25J1/00—Processes or apparatus for liquefying or solidifying gases or gaseous mixtures
    • F25J1/003—Processes or apparatus for liquefying or solidifying gases or gaseous mixtures characterised by the kind of cold generation within the liquefaction unit for compensating heat leaks and liquid production
    • F25J1/0047—Processes or apparatus for liquefying or solidifying gases or gaseous mixtures characterised by the kind of cold generation within the liquefaction unit for compensating heat leaks and liquid production using an "external" refrigerant stream in a closed vapor compression cycle
    • F25J1/0052—Processes or apparatus for liquefying or solidifying gases or gaseous mixtures characterised by the kind of cold generation within the liquefaction unit for compensating heat leaks and liquid production using an "external" refrigerant stream in a closed vapor compression cycle by vaporising a liquid refrigerant stream
    • F25J1/0055—Processes or apparatus for liquefying or solidifying gases or gaseous mixtures characterised by the kind of cold generation within the liquefaction unit for compensating heat leaks and liquid production using an "external" refrigerant stream in a closed vapor compression cycle by vaporising a liquid refrigerant stream originating from an incorporated cascade
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25J—LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
    • F25J1/00—Processes or apparatus for liquefying or solidifying gases or gaseous mixtures
    • F25J1/02—Processes or apparatus for liquefying or solidifying gases or gaseous mixtures requiring the use of refrigeration, e.g. of helium or hydrogen ; Details and kind of the refrigeration system used; Integration with other units or processes; Controlling aspects of the process
    • F25J1/0211—Processes or apparatus for liquefying or solidifying gases or gaseous mixtures requiring the use of refrigeration, e.g. of helium or hydrogen ; Details and kind of the refrigeration system used; Integration with other units or processes; Controlling aspects of the process using a multi-component refrigerant [MCR] fluid in a closed vapor compression cycle
    • F25J1/0214—Processes or apparatus for liquefying or solidifying gases or gaseous mixtures requiring the use of refrigeration, e.g. of helium or hydrogen ; Details and kind of the refrigeration system used; Integration with other units or processes; Controlling aspects of the process using a multi-component refrigerant [MCR] fluid in a closed vapor compression cycle as a dual level refrigeration cascade with at least one MCR cycle
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25J—LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
    • F25J1/00—Processes or apparatus for liquefying or solidifying gases or gaseous mixtures
    • F25J1/02—Processes or apparatus for liquefying or solidifying gases or gaseous mixtures requiring the use of refrigeration, e.g. of helium or hydrogen ; Details and kind of the refrigeration system used; Integration with other units or processes; Controlling aspects of the process
    • F25J1/0243—Start-up or control of the process; Details of the apparatus used; Details of the refrigerant compression system used
    • F25J1/0257—Construction and layout of liquefaction equipments, e.g. valves, machines
    • F25J1/0262—Details of the cold heat exchange system
    • F25J1/0263—Details of the cold heat exchange system using different types of heat exchangers
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25J—LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
    • F25J1/00—Processes or apparatus for liquefying or solidifying gases or gaseous mixtures
    • F25J1/02—Processes or apparatus for liquefying or solidifying gases or gaseous mixtures requiring the use of refrigeration, e.g. of helium or hydrogen ; Details and kind of the refrigeration system used; Integration with other units or processes; Controlling aspects of the process
    • F25J1/0243—Start-up or control of the process; Details of the apparatus used; Details of the refrigerant compression system used
    • F25J1/0279—Compression of refrigerant or internal recycle fluid, e.g. kind of compressor, accumulator, suction drum etc.
    • F25J1/0291—Refrigerant compression by combined gas compression and liquid pumping
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25J—LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
    • F25J1/00—Processes or apparatus for liquefying or solidifying gases or gaseous mixtures
    • F25J1/02—Processes or apparatus for liquefying or solidifying gases or gaseous mixtures requiring the use of refrigeration, e.g. of helium or hydrogen ; Details and kind of the refrigeration system used; Integration with other units or processes; Controlling aspects of the process
    • F25J1/0243—Start-up or control of the process; Details of the apparatus used; Details of the refrigerant compression system used
    • F25J1/0279—Compression of refrigerant or internal recycle fluid, e.g. kind of compressor, accumulator, suction drum etc.
    • F25J1/0292—Refrigerant compression by cold or cryogenic suction of the refrigerant gas
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25J—LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
    • F25J1/00—Processes or apparatus for liquefying or solidifying gases or gaseous mixtures
    • F25J1/02—Processes or apparatus for liquefying or solidifying gases or gaseous mixtures requiring the use of refrigeration, e.g. of helium or hydrogen ; Details and kind of the refrigeration system used; Integration with other units or processes; Controlling aspects of the process
    • F25J1/0243—Start-up or control of the process; Details of the apparatus used; Details of the refrigerant compression system used
    • F25J1/0279—Compression of refrigerant or internal recycle fluid, e.g. kind of compressor, accumulator, suction drum etc.
    • F25J1/0295—Shifting of the compression load between different cooling stages within a refrigerant cycle or within a cascade refrigeration system
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25J—LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
    • F25J1/00—Processes or apparatus for liquefying or solidifying gases or gaseous mixtures
    • F25J1/02—Processes or apparatus for liquefying or solidifying gases or gaseous mixtures requiring the use of refrigeration, e.g. of helium or hydrogen ; Details and kind of the refrigeration system used; Integration with other units or processes; Controlling aspects of the process
    • F25J1/0243—Start-up or control of the process; Details of the apparatus used; Details of the refrigerant compression system used
    • F25J1/0279—Compression of refrigerant or internal recycle fluid, e.g. kind of compressor, accumulator, suction drum etc.
    • F25J1/0296—Removal of the heat of compression, e.g. within an inter- or afterstage-cooler against an ambient heat sink
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25J—LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
    • F25J2205/00—Processes or apparatus using other separation and/or other processing means
    • F25J2205/90—Mixing of components
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25J—LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
    • F25J2220/00—Processes or apparatus involving steps for the removal of impurities
    • F25J2220/60—Separating impurities from natural gas, e.g. mercury, cyclic hydrocarbons
    • F25J2220/64—Separating heavy hydrocarbons, e.g. NGL, LPG, C4+ hydrocarbons or heavy condensates in general

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Mechanical Engineering (AREA)
  • Thermal Sciences (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • General Chemical & Material Sciences (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • Separation By Low-Temperature Treatments (AREA)
IT8046911A 1979-12-12 1980-12-12 Punto di ebollizione. procedimento e impianto di liquefazione di un gas a basso IT1210012B (it)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR7930489A FR2471566B1 (fr) 1979-12-12 1979-12-12 Procede et systeme de liquefaction d'un gaz a bas point d'ebullition

Publications (2)

Publication Number Publication Date
IT8046911A0 IT8046911A0 (it) 1980-12-12
IT1210012B true IT1210012B (it) 1989-09-06

Family

ID=9232695

Family Applications (1)

Application Number Title Priority Date Filing Date
IT8046911A IT1210012B (it) 1979-12-12 1980-12-12 Punto di ebollizione. procedimento e impianto di liquefazione di un gas a basso

Country Status (19)

Country Link
US (1) US4339253A (enExample)
JP (1) JPS56100279A (enExample)
AR (1) AR228349A1 (enExample)
AU (1) AU536389B2 (enExample)
BE (1) BE886593A (enExample)
CA (1) CA1142847A (enExample)
DE (1) DE3046549C2 (enExample)
DZ (1) DZ255A1 (enExample)
EG (1) EG17909A (enExample)
ES (1) ES8200469A1 (enExample)
FR (1) FR2471566B1 (enExample)
GB (1) GB2067734B (enExample)
IN (1) IN155149B (enExample)
IT (1) IT1210012B (enExample)
MY (1) MY8600511A (enExample)
NL (1) NL189375C (enExample)
NO (1) NO154473C (enExample)
OA (1) OA06667A (enExample)
SU (1) SU1355138A3 (enExample)

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FR2703762B1 (fr) * 1993-04-09 1995-05-24 Maurice Grenier Procédé et installation de refroidissement d'un fluide, notamment pour la liquéfaction de gaz naturel.
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FR2751059B1 (fr) * 1996-07-12 1998-09-25 Gaz De France Procede et installation perfectionnes de refroidissement, en particulier pour la liquefaction de gaz naturel
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US6119479A (en) 1998-12-09 2000-09-19 Air Products And Chemicals, Inc. Dual mixed refrigerant cycle for gas liquefaction
MY117548A (en) 1998-12-18 2004-07-31 Exxon Production Research Co Dual multi-component refrigeration cycles for liquefaction of natural gas
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US6347532B1 (en) 1999-10-12 2002-02-19 Air Products And Chemicals, Inc. Gas liquefaction process with partial condensation of mixed refrigerant at intermediate temperatures
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US8491636B2 (en) 2004-03-23 2013-07-23 Medtronic Cryopath LP Method and apparatus for inflating and deflating balloon catheters
US7727228B2 (en) 2004-03-23 2010-06-01 Medtronic Cryocath Lp Method and apparatus for inflating and deflating balloon catheters
DE102005000647A1 (de) * 2005-01-03 2006-07-13 Linde Ag Verfahren zum Verflüssigen eines Kohlenwasserstoff-reichen Stromes
US8206345B2 (en) 2005-03-07 2012-06-26 Medtronic Cryocath Lp Fluid control system for a medical device
AU2006222005B2 (en) * 2005-03-09 2009-06-18 Shell Internationale Research Maatschappij B.V. Method for the liquefaction of a hydrocarbon-rich stream
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RU2305234C2 (ru) * 2005-09-26 2007-08-27 Открытое акционерное общество "Самарский научно-технический комплекс им. Н.Д. Кузнецова" Способ сжижения газа
EP2041507A2 (en) * 2006-07-14 2009-04-01 Shell Internationale Research Maatschappij B.V. Method and apparatus for cooling a hydrocarbon stream
DE102006039661A1 (de) * 2006-08-24 2008-03-20 Linde Ag Verfahren zum Verflüssigen eines Kohlenwasserstoff-reichen Stromes
CA2662654C (en) 2006-10-11 2015-02-17 Shell Canada Limited Method and apparatus for cooling a hydrocarbon stream
CA2671160C (en) * 2006-12-06 2015-05-19 Shell Canada Limited Method and apparatus for passing a mixed vapour and liquid stream and method of cooling a hydrocarbon stream
US20090090131A1 (en) * 2007-10-09 2009-04-09 Chevron U.S.A. Inc. Process and system for removing total heat from base load liquefied natural gas facility
GB2469077A (en) * 2009-03-31 2010-10-06 Dps Bristol Process for the offshore liquefaction of a natural gas feed
EP2483617A2 (en) * 2009-09-28 2012-08-08 Koninklijke Philips Electronics N.V. System and method for liquefying and storing a fluid
FR2993643B1 (fr) * 2012-07-17 2014-08-22 Saipem Sa Procede de liquefaction de gaz naturel avec changement de phase
US10054262B2 (en) 2014-04-16 2018-08-21 Cpsi Holdings Llc Pressurized sub-cooled cryogenic system
DE102015002822A1 (de) * 2015-03-05 2016-09-08 Linde Aktiengesellschaft Verfahren zum Verflüssigen einer Kohlenwasserstoff-reichen Fraktion
US10443927B2 (en) * 2015-09-09 2019-10-15 Black & Veatch Holding Company Mixed refrigerant distributed chilling scheme
US11668522B2 (en) * 2016-07-21 2023-06-06 Air Products And Chemicals, Inc. Heavy hydrocarbon removal system for lean natural gas liquefaction
US10323880B2 (en) * 2016-09-27 2019-06-18 Air Products And Chemicals, Inc. Mixed refrigerant cooling process and system
US10788261B2 (en) * 2018-04-27 2020-09-29 Air Products And Chemicals, Inc. Method and system for cooling a hydrocarbon stream using a gas phase refrigerant
US10866022B2 (en) * 2018-04-27 2020-12-15 Air Products And Chemicals, Inc. Method and system for cooling a hydrocarbon stream using a gas phase refrigerant
US20250290691A1 (en) * 2022-04-29 2025-09-18 Qatar Foundation For Education, Science And Community Development Dual-mixed refrigerant precooling process
CN115711360B (zh) * 2022-11-15 2023-12-08 中国船舶集团有限公司第七一一研究所 一种深冷式蒸发气体再液化系统

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FR2292203A1 (fr) * 1974-11-21 1976-06-18 Technip Cie Procede et installation pour la liquefaction d'un gaz a bas point d'ebullition
DE2820212A1 (de) * 1978-05-09 1979-11-22 Linde Ag Verfahren zum verfluessigen von erdgas

Also Published As

Publication number Publication date
GB2067734B (en) 1983-11-30
GB2067734A (en) 1981-07-30
AU6531880A (en) 1981-06-18
AR228349A1 (es) 1983-02-28
ES497706A0 (es) 1981-11-01
NL189375B (nl) 1992-10-16
NO803741L (no) 1981-09-15
CA1142847A (en) 1983-03-15
NO154473C (no) 1986-09-24
NL8006736A (nl) 1981-07-16
FR2471566B1 (fr) 1986-09-05
IT8046911A0 (it) 1980-12-12
DE3046549C2 (de) 1994-05-05
BE886593A (fr) 1981-06-11
JPH0147718B2 (enExample) 1989-10-16
EG17909A (en) 1991-06-30
IN155149B (enExample) 1985-01-05
FR2471566A1 (fr) 1981-06-19
NL189375C (nl) 1993-03-16
US4339253A (en) 1982-07-13
JPS56100279A (en) 1981-08-12
SU1355138A3 (ru) 1987-11-23
DZ255A1 (fr) 2004-09-13
MY8600511A (en) 1986-12-31
AU536389B2 (en) 1984-05-03
NO154473B (no) 1986-06-16
ES8200469A1 (es) 1981-11-01
DE3046549A1 (de) 1981-08-27
OA06667A (fr) 1981-09-30

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