IL45503A - Catalyst compositions for olefin oxidation reactions - Google Patents

Catalyst compositions for olefin oxidation reactions

Info

Publication number
IL45503A
IL45503A IL45503A IL4550374A IL45503A IL 45503 A IL45503 A IL 45503A IL 45503 A IL45503 A IL 45503A IL 4550374 A IL4550374 A IL 4550374A IL 45503 A IL45503 A IL 45503A
Authority
IL
Israel
Prior art keywords
catalyst
propylene
isobutylene
mixture
catalysts
Prior art date
Application number
IL45503A
Other languages
English (en)
Other versions
IL45503A0 (en
Original Assignee
Standard Oil Co Ohio
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 Standard Oil Co Ohio filed Critical Standard Oil Co Ohio
Publication of IL45503A0 publication Critical patent/IL45503A0/xx
Publication of IL45503A publication Critical patent/IL45503A/en

Links

Classifications

    • 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
    • B01J23/00—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00
    • B01J23/70—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00 of the iron group metals or copper
    • B01J23/76—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00 of the iron group metals or copper combined with metals, oxides or hydroxides provided for in groups B01J23/02 - B01J23/36
    • B01J23/84—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00 of the iron group metals or copper combined with metals, oxides or hydroxides provided for in groups B01J23/02 - B01J23/36 with arsenic, antimony, bismuth, vanadium, niobium, tantalum, polonium, chromium, molybdenum, tungsten, manganese, technetium or rhenium
    • B01J23/85—Chromium, molybdenum or tungsten
    • B01J23/88—Molybdenum
    • B01J23/887—Molybdenum containing in addition other metals, oxides or hydroxides provided for in groups B01J23/02 - B01J23/36
    • B01J23/8878—Chromium
    • 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
    • B01J23/00—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00
    • B01J23/70—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00 of the iron group metals or copper
    • B01J23/76—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00 of the iron group metals or copper combined with metals, oxides or hydroxides provided for in groups B01J23/02 - B01J23/36
    • B01J23/84—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00 of the iron group metals or copper combined with metals, oxides or hydroxides provided for in groups B01J23/02 - B01J23/36 with arsenic, antimony, bismuth, vanadium, niobium, tantalum, polonium, chromium, molybdenum, tungsten, manganese, technetium or rhenium
    • B01J23/85—Chromium, molybdenum or tungsten
    • B01J23/888—Tungsten
    • B01J23/8885—Tungsten containing also molybdenum
    • 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
    • B01J27/00—Catalysts comprising the elements or compounds of halogens, sulfur, selenium, tellurium, phosphorus or nitrogen; Catalysts comprising carbon compounds
    • B01J27/14—Phosphorus; Compounds thereof
    • B01J27/186—Phosphorus; Compounds thereof with arsenic, antimony, bismuth, vanadium, niobium, tantalum, polonium, chromium, molybdenum, tungsten, manganese, technetium or rhenium
    • B01J27/188—Phosphorus; Compounds thereof with arsenic, antimony, bismuth, vanadium, niobium, tantalum, polonium, chromium, molybdenum, tungsten, manganese, technetium or rhenium with chromium, molybdenum, tungsten or polonium
    • B01J27/19—Molybdenum
    • B01J27/192—Molybdenum with bismuth
    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
    • C07C253/00—Preparation of carboxylic acid nitriles
    • C07C253/24—Preparation of carboxylic acid nitriles by ammoxidation of hydrocarbons or substituted hydrocarbons
    • C07C253/26—Preparation of carboxylic acid nitriles by ammoxidation of hydrocarbons or substituted hydrocarbons containing carbon-to-carbon multiple bonds, e.g. unsaturated aldehydes
    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
    • C07C45/00—Preparation of compounds having >C = O groups bound only to carbon or hydrogen atoms; Preparation of chelates of such compounds
    • C07C45/27—Preparation of compounds having >C = O groups bound only to carbon or hydrogen atoms; Preparation of chelates of such compounds by oxidation
    • C07C45/32—Preparation of compounds having >C = O groups bound only to carbon or hydrogen atoms; Preparation of chelates of such compounds by oxidation with molecular oxygen
    • C07C45/33—Preparation of compounds having >C = O groups bound only to carbon or hydrogen atoms; Preparation of chelates of such compounds by oxidation with molecular oxygen of CHx-moieties
    • C07C45/34—Preparation of compounds having >C = O groups bound only to carbon or hydrogen atoms; Preparation of chelates of such compounds by oxidation with molecular oxygen of CHx-moieties in unsaturated compounds
    • C07C45/35—Preparation of compounds having >C = O groups bound only to carbon or hydrogen atoms; Preparation of chelates of such compounds by oxidation with molecular oxygen of CHx-moieties in unsaturated compounds in propene or isobutene
    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
    • C07C5/00—Preparation of hydrocarbons from hydrocarbons containing the same number of carbon atoms
    • C07C5/42—Preparation of hydrocarbons from hydrocarbons containing the same number of carbon atoms by dehydrogenation with a hydrogen acceptor
    • C07C5/48—Preparation of hydrocarbons from hydrocarbons containing the same number of carbon atoms by dehydrogenation with a hydrogen acceptor with oxygen as an acceptor
    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
    • C07C51/00—Preparation of carboxylic acids or their salts, halides or anhydrides
    • C07C51/16—Preparation of carboxylic acids or their salts, halides or anhydrides by oxidation
    • C07C51/21—Preparation of carboxylic acids or their salts, halides or anhydrides by oxidation with molecular oxygen
    • C07C51/25—Preparation of carboxylic acids or their salts, halides or anhydrides by oxidation with molecular oxygen of unsaturated compounds containing no six-membered aromatic ring
    • C07C51/252—Preparation of carboxylic acids or their salts, halides or anhydrides by oxidation with molecular oxygen of unsaturated compounds containing no six-membered aromatic ring of propene, butenes, acrolein or methacrolein
    • 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
    • B01J2523/00—Constitutive chemical elements of heterogeneous catalysts
    • 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
    • Y02P20/52—Improvements relating to the production of bulk chemicals using catalysts, e.g. selective catalysts
    • 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
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S585/00—Chemistry of hydrocarbon compounds
    • Y10S585/8995—Catalyst and recycle considerations
    • Y10S585/906—Catalyst preservation or manufacture, e.g. activation before use
IL45503A 1973-09-04 1974-08-20 Catalyst compositions for olefin oxidation reactions IL45503A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US05/393,732 US3956181A (en) 1973-09-04 1973-09-04 Oxidation catalyst

Publications (2)

Publication Number Publication Date
IL45503A0 IL45503A0 (en) 1974-11-29
IL45503A true IL45503A (en) 1977-06-30

Family

ID=23556013

Family Applications (1)

Application Number Title Priority Date Filing Date
IL45503A IL45503A (en) 1973-09-04 1974-08-20 Catalyst compositions for olefin oxidation reactions

Country Status (32)

Country Link
US (1) US3956181A (xx)
JP (1) JPS5064191A (xx)
AR (1) AR205351A1 (xx)
BE (1) BE819533A (xx)
BG (1) BG36494A3 (xx)
BR (1) BR7407285D0 (xx)
CA (1) CA1048481A (xx)
CH (3) CH603514A5 (xx)
CS (1) CS220305B2 (xx)
DD (1) DD112906A5 (xx)
DE (1) DE2440329C2 (xx)
DK (1) DK146583C (xx)
EG (1) EG11372A (xx)
ES (1) ES429744A1 (xx)
FI (1) FI62959C (xx)
FR (1) FR2242146B1 (xx)
GB (1) GB1473530A (xx)
HU (2) HU181732B (xx)
IE (1) IE39886B1 (xx)
IL (1) IL45503A (xx)
IN (1) IN143036B (xx)
IT (1) IT1020135B (xx)
MY (1) MY7800190A (xx)
NL (1) NL186138C (xx)
NO (1) NO141830C (xx)
PH (1) PH12128A (xx)
PL (1) PL108045B1 (xx)
RO (1) RO66352A (xx)
SE (1) SE403104B (xx)
SU (1) SU588906A3 (xx)
TR (1) TR18345A (xx)
ZA (1) ZA745492B (xx)

Families Citing this family (66)

* Cited by examiner, † Cited by third party
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US4190556A (en) * 1973-07-19 1980-02-26 Standard Oil Company Production of unsaturated nitriles using catalysts promoted with various metals
US4162234A (en) * 1974-07-22 1979-07-24 The Standard Oil Company Oxidation catalysts
IT1025612B (it) * 1974-11-12 1978-08-30 Montedison Spa Procedimento per la preparazione di aldeidi ed acidi carbossilici insaturi per ossidazione cataliti ca in fase gassosa delle corrispondenti olefine
US4397771A (en) * 1975-01-13 1983-08-09 The Standard Oil Co. Oxidation catalysts
CA1071659A (en) * 1975-09-18 1980-02-12 Goodyear Tire And Rubber Company (The) Oxidative dehydrogenation of olefins to diolefins
US4052332A (en) * 1976-04-20 1977-10-04 E. I. Du Pont De Nemours And Company Catalyst regeneration with impregnation of bismuth and molybdenum
US4101448A (en) * 1976-05-14 1978-07-18 The Standard Oil Company Catalyst compositions especially useful for preparation of unsaturated acids
US4083805A (en) * 1976-06-30 1978-04-11 The Standard Oil Company Preparation of methacrylic acid from methacrolein
US4167516A (en) * 1977-02-10 1979-09-11 Denka Chemical Corporation Preparation of dicarboxylic anhydrides
US4105586A (en) * 1977-02-10 1978-08-08 Denka Chemical Corporation Oxidation catalysts and process for preparing anhydride from alkanes
US4202826A (en) * 1977-02-10 1980-05-13 Denka Chemical Corporation Process for preparing anhydride from alkanes
US4556731A (en) * 1977-07-28 1985-12-03 The Standard Oil Company Process for the oxidation of olefins using catalysts containing various promoter elements
US4322368A (en) * 1979-12-28 1982-03-30 The Standard Oil Co. Copper-promoted antimony phosphate oxide complex catalysts
JPS56140931A (en) * 1980-04-04 1981-11-04 Nippon Zeon Co Ltd Preparation of conjugated diolefin
JPS56150023A (en) * 1980-04-22 1981-11-20 Nippon Zeon Co Ltd Preparation of conjugated diolefin
US4444906A (en) * 1981-06-08 1984-04-24 The Standard Oil Company Method for the preparation of high activity phosphomolybdic acid based catalysts
CA1199905A (en) * 1982-06-07 1986-01-28 William J. Kennelly Catalyst compositions and their use for the preparation of unsaturated carboxylic acids
JPS59115750A (ja) * 1982-12-22 1984-07-04 Nippon Shokubai Kagaku Kogyo Co Ltd メタクリル酸合成用触媒
US4777313A (en) * 1983-08-12 1988-10-11 Atlantic Richfield Company Boron-promoted reducible metal oxides and methods of their use
US4855275A (en) * 1988-02-18 1989-08-08 The Standard Oil Company Catalyst performance improvement via separate boron addition
US5134105A (en) * 1990-03-19 1992-07-28 The Standard Oil Company Catalyst for propylene ammoxidation to acrylonitrile
US5158923A (en) * 1990-05-21 1992-10-27 Scientific Design Company, Inc. Phosphorous/vanadium oxidation catalyst
US5262548A (en) * 1990-05-21 1993-11-16 Scientific Design Company, Inc. Phosphorous/vanadium oxidation catalyst
TR27951A (tr) * 1992-06-23 1995-11-08 Standard Oil Co Ohio Akrilonitrile propilen amoksidasyonu icin gelistirilmis bir islem ve katalizör.
JP3114587B2 (ja) * 1995-10-23 2000-12-04 ヤマハ株式会社 カラオケアンプ
DE60034295T2 (de) * 1999-11-24 2008-01-03 Saudi Basic Industries Corp. Oxidative Dehydrierung von Paraffinen
US7649111B2 (en) * 2005-07-25 2010-01-19 Saudi Basic Industries Corporation Catalyst for the oxidation of a mixed aldehyde feedstock to methacrylic acid and methods for making and using same
US7851397B2 (en) * 2005-07-25 2010-12-14 Saudi Basic Industries Corporation Catalyst for methacrolein oxidation and method for making and using same
US7732367B2 (en) * 2005-07-25 2010-06-08 Saudi Basic Industries Corporation Catalyst for methacrolein oxidation and method for making and using same
US7649112B2 (en) 2005-07-25 2010-01-19 Saudi Basic Industries Corporation Integrated plant for producing 2-ethyl-hexanol and methacrylic acid and a method based thereon
US7799946B2 (en) * 2007-02-14 2010-09-21 Saudi Basic Industries Corporation Process for separating methacrolein from methacrylic acid in a gas phase product from the partial oxidation of isobutene
KR100888133B1 (ko) * 2007-10-02 2009-03-13 에스케이에너지 주식회사 4종의 금속성분으로 구성된 다성분계 비스무스몰리브데이트 촉매 제조방법 및 상기촉매를 이용하여1,3-부타디엔을 제조하는 방법
JP2013505997A (ja) * 2010-07-09 2013-02-21 住友化学株式会社 酸化オレフィンの製造方法
JP2013506000A (ja) * 2010-07-09 2013-02-21 住友化学株式会社 酸化オレフィンの製造方法
JP2013505996A (ja) * 2010-07-10 2013-02-21 住友化学株式会社 酸化オレフィンの製造方法
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JP6138161B2 (ja) 2012-01-30 2017-05-31 ビーエーエスエフ ソシエタス・ヨーロピアＢａｓｆ Ｓｅ ｎ−ブタンからのブタジエンおよび／またはブテン類の製造方法
US8722940B2 (en) 2012-03-01 2014-05-13 Saudi Basic Industries Corporation High molybdenum mixed metal oxide catalysts for the production of unsaturated aldehydes from olefins
EP2897927B1 (de) 2012-09-20 2016-06-22 Basf Se Verfahren zur herstellung von butadien mit entfernung von sauerstoff aus c4-kohlenwasserstoffströmen
US9399606B2 (en) 2012-12-06 2016-07-26 Basf Se Catalyst and process for the oxidative dehydrogenation of N-butenes to butadiene
JP2016502549A (ja) 2012-12-06 2016-01-28 ビーエーエスエフ ソシエタス・ヨーロピアＢａｓｆ Ｓｅ ｎ−ブテン類からブタジエンへの酸化的脱水素化法
KR20150105456A (ko) 2013-01-15 2015-09-16 바스프 에스이 산화성 탈수소화를 통해 n-부텐으로부터 1,3-부타디엔을 제조하는 방법
US10144681B2 (en) 2013-01-15 2018-12-04 Basf Se Process for the oxidative dehydrogenation of N-butenes to butadiene
KR20150105455A (ko) 2013-01-16 2015-09-16 바스프 에스이 생성물을 처리하는 동안에 과산화물 함량을 모니터링하는, n-부텐의 산화성 탈수소화에 의한 부타디엔의 제조 방법
US20160152530A1 (en) 2013-07-10 2016-06-02 Basf Se Method for the oxidative dehydrogenation of n-butenes to butadiene
EP3063112B1 (de) 2013-10-30 2017-12-13 Basf Se Verfahren zur herstellung von 1,3-butadien aus n-butenen durch oxidative dehydrierung
JP2017502988A (ja) 2014-01-13 2017-01-26 ビーエーエスエフ ソシエタス・ヨーロピアＢａｓｆ Ｓｅ ｎ−ブテンを酸化的脱水素するための反応器の起動法
DE102014203725A1 (de) 2014-02-28 2015-09-03 Basf Se Oxidationskatalysator mit sattelförmigem Trägerformkörper
EP3180298B1 (de) 2014-08-12 2018-11-07 Basf Se Verfahren zur herstellung von 1,3-butadien aus n-butenen durch oxidative dehydrierung
WO2016046009A1 (de) 2014-09-26 2016-03-31 Basf Se Verfahren zur herstellung von 1,3-butadien aus n-butenen durch oxidative dehydrierung
CN107074691A (zh) 2014-11-03 2017-08-18 巴斯夫欧洲公司 通过氧化脱氢从正丁烯制备1,3‑丁二烯的方法
EA034435B1 (ru) 2014-11-14 2020-02-07 Басф Се Способ получения 1,3-бутадиенов путем дегидрирования н-бутенов с получением потока вещества, содержащего бутаны и 2-бутены
EP3274320B1 (de) 2015-03-26 2019-02-27 Basf Se Verfahren zur herstellung von 1,3-butadien aus n-butenen durch oxidative dehydrierung
CN107428636A (zh) 2015-03-26 2017-12-01 巴斯夫欧洲公司 由正丁烯通过氧化脱氢制造1,3‑丁二烯
WO2016150940A1 (de) 2015-03-26 2016-09-29 Basf Se Verfahren zur herstellung von 1,3-butadien aus n-butenen durch oxidative dehydrierung
WO2016151074A1 (de) 2015-03-26 2016-09-29 Basf Se Verfahren zur herstellung von 1,3-butadien aus n-butenen durch oxidative dehydrierung
KR20180101361A (ko) 2015-12-03 2018-09-12 바스프 에스이 n-부텐의 산화성 탈수소화에 의해 부타디엔을 제조하는 방법
WO2017121739A1 (de) 2016-01-13 2017-07-20 Basf Se Verfahren zur herstellung von 1,3-butadien aus n-butenen durch oxidative dehydrierung
CN108884003A (zh) 2016-02-04 2018-11-23 巴斯夫欧洲公司 通过氧化脱氢由n-丁烯制备1,3-丁二烯的方法
EP3497073A1 (de) 2016-08-09 2019-06-19 Basf Se Verfahren zum anfahren eines reaktors zur oxidativen dehydrierung von n-butenen
WO2018095840A1 (de) 2016-11-22 2018-05-31 Basf Se Verfahren zur herstellung von 1,3-butadien aus n-butenen durch oxidative dehydrierung umfassend eine furan-abtrennung bei der aufarbeitung
EP3323797A1 (de) 2016-11-22 2018-05-23 Basf Se Verfahren zur herstellung von 1,3-butadien aus n-butenen durch oxidative dehydrierung umfassend eine saure wäsche des c4-produktgasstroms
WO2018095856A1 (de) 2016-11-22 2018-05-31 Basf Se Verfahren zur herstellung von 1,3-butadien aus n-butenen durch oxidative dehydrierung umfassend eine methacrolein-abtrennung bei der aufarbeitung
WO2018095776A1 (de) 2016-11-22 2018-05-31 Basf Se Verfahren zur herstellung von 1,3-butadien aus n-butenen durch oxidative dehydrierung umfassend eine wässrige wäsche des c4-produktgasstroms
WO2018219996A1 (de) 2017-06-02 2018-12-06 Basf Se Verfahren zur herstellung von 1,3-butadien aus n-butenen durch oxidative dehydrierung in kreisgasfahrweise mit co2-angereichertem kreisgas
WO2018234158A1 (de) 2017-06-19 2018-12-27 Basf Se Verfahren zur herstellung von 1,3-butadien aus n-butenen durch oxidative dehydrierung umfassend eine wäsche des c4-produktgasstroms

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Also Published As

Publication number Publication date
EG11372A (en) 1977-08-15
NL186138C (nl) 1990-10-01
ZA745492B (en) 1975-09-24
NL7411580A (nl) 1975-03-06
IE39886B1 (en) 1979-01-17
ES429744A1 (es) 1977-06-16
BR7407285D0 (pt) 1975-07-01
HU181951B (en) 1983-11-28
CS220305B2 (en) 1983-03-25
JPS5064191A (xx) 1975-05-31
FI62959C (fi) 1983-04-11
IN143036B (xx) 1977-09-24
SE7410289L (xx) 1975-03-05
CH605477A5 (xx) 1978-09-29
CA1048481A (en) 1979-02-13
HU181732B (en) 1983-11-28
TR18345A (tr) 1977-01-12
PH12128A (en) 1978-11-07
FI257074A (xx) 1975-03-05
FR2242146B1 (xx) 1980-10-24
NL186138B (nl) 1990-05-01
PL108045B1 (pl) 1980-03-31
AR205351A1 (es) 1976-04-30
BE819533A (fr) 1975-03-04
NO141830C (no) 1980-05-21
NO141830B (no) 1980-02-11
CH603514A5 (xx) 1978-08-15
DK146583B (da) 1983-11-14
IT1020135B (it) 1977-12-20
AU7283974A (en) 1976-03-04
FI62959B (fi) 1982-12-31
DE2440329C2 (de) 1982-10-21
DK146583C (da) 1984-04-30
DE2440329A1 (de) 1975-03-13
DD112906A5 (xx) 1975-05-12
NO743150L (xx) 1975-04-01
CH600946A5 (xx) 1978-06-30
DK465074A (xx) 1975-05-05
GB1473530A (en) 1977-05-11
FR2242146A1 (xx) 1975-03-28
RO66352A (fr) 1979-07-15
BG36494A3 (en) 1984-11-15
US3956181A (en) 1976-05-11
MY7800190A (en) 1978-12-31
IE39886L (en) 1975-03-04
IL45503A0 (en) 1974-11-29
SE403104B (sv) 1978-07-31
SU588906A3 (ru) 1978-01-15

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