SE428761B - Katalysator - Google Patents

Katalysator

Info

Publication number
SE428761B
SE428761B SE7203359A SE335972A SE428761B SE 428761 B SE428761 B SE 428761B SE 7203359 A SE7203359 A SE 7203359A SE 335972 A SE335972 A SE 335972A SE 428761 B SE428761 B SE 428761B
Authority
SE
Sweden
Prior art keywords
catalyst
Prior art date
Application number
SE7203359A
Other languages
English (en)
Inventor
G J K Acres
Original Assignee
Johnson Matthey Co Ltd
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 Johnson Matthey Co Ltd filed Critical Johnson Matthey Co Ltd
Publication of SE428761B publication Critical patent/SE428761B/sv

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
    • B01D53/34—Chemical or biological purification of waste gases
    • B01D53/92—Chemical or biological purification of waste gases of engine exhaust gases
    • B01D53/94—Chemical or biological purification of waste gases of engine exhaust gases by catalytic processes
    • B01D53/9445—Simultaneously removing carbon monoxide, hydrocarbons or nitrogen oxides making use of three-way catalysts [TWC] or four-way-catalysts [FWC]
    • B01D53/945—Simultaneously removing carbon monoxide, hydrocarbons or nitrogen oxides making use of three-way catalysts [TWC] or four-way-catalysts [FWC] characterised by a specific catalyst
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
    • B01D53/34—Chemical or biological purification of waste gases
    • B01D53/92—Chemical or biological purification of waste gases of engine exhaust gases
    • B01D53/94—Chemical or biological purification of waste gases of engine exhaust gases by catalytic processes
    • B01D53/9404—Removing only nitrogen compounds
    • B01D53/9409—Nitrogen oxides
    • B01D53/9413—Processes characterised by a specific catalyst
    • 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
    • B01J23/38—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00 of noble metals
    • B01J23/40—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00 of noble metals of the platinum group metals
    • B01J23/46—Ruthenium, rhodium, osmium or iridium
    • B01J23/464—Rhodium
    • 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
    • B01J23/38—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00 of noble metals
    • B01J23/48—Silver or gold
    • 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
    • B01J23/38—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00 of noble metals
    • B01J23/54—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00 of noble metals combined with metals, oxides or hydroxides provided for in groups B01J23/02 - B01J23/36
    • B01J23/56—Platinum group metals
    • 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
    • B01J23/89—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00 of the iron group metals or copper combined with noble metals
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2255/00—Catalysts
    • B01D2255/10—Noble metals or compounds thereof
    • B01D2255/102—Platinum group metals
    • B01D2255/1021—Platinum
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2255/00—Catalysts
    • B01D2255/10—Noble metals or compounds thereof
    • B01D2255/102—Platinum group metals
    • B01D2255/1025—Rhodium
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2255/00—Catalysts
    • B01D2255/10—Noble metals or compounds thereof
    • B01D2255/104—Silver
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2255/00—Catalysts
    • B01D2255/20—Metals or compounds thereof
    • B01D2255/206—Rare earth metals
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2255/00—Catalysts
    • B01D2255/20—Metals or compounds thereof
    • B01D2255/206—Rare earth metals
    • B01D2255/2068—Neodymium
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2255/00—Catalysts
    • B01D2255/20—Metals or compounds thereof
    • B01D2255/207—Transition metals
    • B01D2255/20738—Iron
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2255/00—Catalysts
    • B01D2255/20—Metals or compounds thereof
    • B01D2255/207—Transition metals
    • B01D2255/20746—Cobalt
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2255/00—Catalysts
    • B01D2255/20—Metals or compounds thereof
    • B01D2255/207—Transition metals
    • B01D2255/20753—Nickel
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2255/00—Catalysts
    • B01D2255/20—Metals or compounds thereof
    • B01D2255/207—Transition metals
    • B01D2255/20761—Copper
    • 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
    • Y02C—CAPTURE, STORAGE, SEQUESTRATION OR DISPOSAL OF GREENHOUSE GASES [GHG]
    • Y02C20/00—Capture or disposal of greenhouse gases
    • Y02C20/20—Capture or disposal of greenhouse gases of methane
    • 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
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/10—Internal combustion engine [ICE] based vehicles
    • Y02T10/12—Improving ICE efficiencies

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Organic Chemistry (AREA)
  • Materials Engineering (AREA)
  • Health & Medical Sciences (AREA)
  • Analytical Chemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • Environmental & Geological Engineering (AREA)
  • Biomedical Technology (AREA)
  • Combustion & Propulsion (AREA)
  • Catalysts (AREA)
SE7203359A 1971-03-16 1972-03-15 Katalysator SE428761B (sv)

Applications Claiming Priority (6)

Application Number Priority Date Filing Date Title
GB698871 1971-03-16
GB698671A GB1390182A (en) 1971-03-16 1971-03-16 Catalysis
GB2839171 1971-06-17
GB2839271 1971-06-17
GB5205371 1971-11-09
GB5205271 1971-11-09

Publications (1)

Publication Number Publication Date
SE428761B true SE428761B (sv) 1983-07-25

Family

ID=27546544

Family Applications (1)

Application Number Title Priority Date Filing Date
SE7203359A SE428761B (sv) 1971-03-16 1972-03-15 Katalysator

Country Status (10)

Country Link
US (1) US3840471A (sv)
JP (1) JPS5645651B1 (sv)
BE (1) BE780767A (sv)
CA (1) CA1002731A (sv)
DE (1) DE2212616A1 (sv)
FR (1) FR2130310B1 (sv)
GB (1) GB1390182A (sv)
IT (1) IT950251B (sv)
NL (1) NL173825C (sv)
SE (1) SE428761B (sv)

Families Citing this family (76)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1417544A (en) * 1971-11-22 1975-12-10 Johnson Matthey Co Ltd Catalysts containing platinum and rhodium
CA1038599A (en) * 1972-12-14 1978-09-19 James M. Maselli Catalytic removal of nitrogen oxides from exhaust gases
DE2306395C3 (de) * 1973-02-09 1978-08-10 Deutsche Gold- Und Silber-Scheideanstalt Vormals Roessler, 6000 Frankfurt Trägerkatalysator
US3997651A (en) * 1973-02-26 1976-12-14 Bocciarelli Carlo V Catalyst material, method of preparation thereof, and method and apparatus using same
US4012485A (en) * 1973-02-27 1977-03-15 Standard Oil Company Process for treating exhaust gas from internal combustion engine over catalyst comprising nickel, rhodium, and monolithic ceramic support
JPS5523086B2 (sv) * 1973-03-26 1980-06-20
US3898154A (en) * 1973-07-05 1975-08-05 Universal Oil Prod Co Hydrocarbon conversion with a multimetallic catalytic composite
JPS50133995A (sv) * 1974-04-11 1975-10-23
US4117082A (en) * 1974-04-19 1978-09-26 Figaro Giken Co., Ltd. Method of completely oxidizing carbon monoxide
US3998723A (en) * 1974-06-19 1976-12-21 Universal Oil Products Company Hydrocarbon conversion with an acidic multimetallic catalytic composite
US3948762A (en) * 1974-07-19 1976-04-06 Universal Oil Products Company Hydrocarbon conversion with an acidic multimetallic catalytic composite
US4003955A (en) * 1974-07-19 1977-01-18 Uop Inc. Dehydrocyclization with an acidic multimetallic catalytic composite
FR2286187A1 (fr) * 1974-09-25 1976-04-23 Catalyse Soc Prod Francais Catalyseurs d'hydroconversion des hydrocarbures
US4009220A (en) * 1975-01-02 1977-02-22 Uop Inc. Dehydrocyclization with an acidic multimetallic catalytic composite
US4013735A (en) * 1975-04-02 1977-03-22 Uop Inc. Dehydrocyclization with an acidic multimetallic catalytic composite
MX4509E (es) * 1975-08-27 1982-06-02 Engelhard Min & Chem Composicion catalitica mejorada para oxidar en forma simultanea hidrocarburos gascosos y monoxido de carbono y reducir oxidos de nitrogeno
JPS5227086A (en) * 1975-08-28 1977-03-01 Nissan Motor Co Ltd Catalyst for purification of exhaust gas
DE2538706C2 (de) * 1975-08-30 1984-01-19 Kali-Chemie Ag, 3000 Hannover Verfahren zur Reinigung von Autoabgasen
US4083883A (en) * 1976-03-16 1978-04-11 Uop Inc. Hydrocarbon dehydrogenation using a platinum or palladium, rhodium, nickel, alkaline or alkaline earth metal catalyst
GB1590023A (en) * 1976-08-24 1981-05-28 Johnson Matthey Co Ltd Catalytic decomposition of nitrogen oxides
US4233185A (en) * 1976-12-08 1980-11-11 Johnson, Matthey & Co., Limited Catalysts for oxidation and reduction
SE7800987L (sv) * 1977-02-04 1978-08-05 Johnson Matthey Co Ltd Katalysator
US4179413A (en) * 1977-03-09 1979-12-18 Ford Motor Company Enriched rhodium catalyst and method for making same
US4136064A (en) * 1977-03-25 1979-01-23 Uop Inc. Multimetallic catalytic composite
GB1604246A (en) * 1977-06-08 1981-12-02 Johnson Matthey Co Ltd Catalysts for oxidation and reduction processes
CA1123818A (en) * 1977-08-05 1982-05-18 Anthony Gartshore Catalyst for purification and/or control of exhaust gases
US4171288A (en) * 1977-09-23 1979-10-16 Engelhard Minerals & Chemicals Corporation Catalyst compositions and the method of manufacturing them
US4171287A (en) * 1977-09-23 1979-10-16 Engelhard Minerals & Chemicals Corporation Catalyst compositions and the method of manufacturing them
US4192779A (en) * 1977-10-19 1980-03-11 Ford Motor Company Catalyst system and method for increasing the selectivity of a catalyst
GB2027358B (en) * 1978-07-12 1983-04-27 Nippon Catalytic Chem Ind Exhaust gas purification catalysts
SU877836A1 (ru) * 1978-11-23 1984-01-30 Предприятие П/Я Р-6913 Катализатор дл деалкилировани алкилбензолов с вод ным паром
FR2466278A1 (fr) * 1979-10-04 1981-04-10 Pro Catalyse Catalyseur et procede de traitement des gaz d'echappement des moteurs a combustion interne
US4328129A (en) * 1979-12-14 1982-05-04 Ethyl Corporation Catalyst for making dimethyl ether and methanol from synthesis gas
SE8101286L (sv) * 1980-03-10 1981-09-11 Johnson Matthey Co Ltd Uppfinning avser avgasrening och speciellt katalytisk rening av avgaser fran forbrenningsmotorer
US4414140A (en) * 1981-12-23 1983-11-08 United Technologies Corporation Catalyst for steam reforming
US4675306A (en) * 1983-04-11 1987-06-23 The Standard Oil Company Preparation of catalyst for producing alcohols
DE3539127C1 (de) * 1985-11-05 1987-01-02 Hoechst Ag Verfahren zur Herstellung eines Traegerkatalysators
US4677094A (en) * 1986-09-22 1987-06-30 Uop Inc. Trimetallic reforming catalyst
US4923595A (en) * 1986-09-22 1990-05-08 Uop Trimetallic reforming catalyst
US5149680A (en) * 1987-03-31 1992-09-22 The British Petroleum Company P.L.C. Platinum group metal alloy catalysts for hydrogenation of carboxylic acids and their anhydrides to alcohols and/or esters
US4760044A (en) * 1987-06-15 1988-07-26 Allied-Signal Inc. Catalyst for minimizing the H2 S emissions from automotive exhaust and method of its manufacture
US5008090A (en) * 1987-06-15 1991-04-16 Allied-Signal Inc. Catalytic process for minimizing the H2 S emissions from automotive exhaust
EP0362960A3 (en) * 1988-10-05 1990-06-27 Sakai Chemical Industry Co., Ltd., Use of a catalyst composition for denitrization and denitrizing catalysts
CA1295813C (en) * 1988-12-14 1992-02-18 Karl T. Chuang Reduction of nitrogen oxides
US4985388A (en) * 1989-06-29 1991-01-15 W. R. Grace & Co.-Conn. Catalytic exhaust pipe insert
US5010051A (en) * 1989-11-08 1991-04-23 Engelhard Corporation Staged three-way conversion catalyst and method of using the same
JPH05208134A (ja) * 1991-10-17 1993-08-20 Shell Internatl Res Maatschappij Bv 炭化水素の接触的部分酸化のための酸化方法および触媒
JPH10501172A (ja) * 1994-06-01 1998-02-03 エイエスイーシー・マニュファクチュアリング・カンパニー 過剰な酸素を含む内燃エンジンからの排気ガス中のＮＯ▲ｘ▼の還元用合金化金属触媒
DE19517598C1 (de) * 1995-05-13 1997-01-02 Degussa Platin-Aluminium-Legierungskatalysator und dessen Verwendung in Brennstoffzellen
US6030590A (en) * 1995-12-26 2000-02-29 Cosmo Research Institute Reduction purification method of nitrogen oxide-containing exhaust gas
US5849256A (en) * 1996-04-26 1998-12-15 Engelhard Corporation Method for oxidizing carbon monoxide in a gas stream containing oxidizable sulphur compounds
GB0030170D0 (en) * 2000-12-11 2001-01-24 Norske Stats Oljeselskap Fischer-tropsch catalyst
AU2003217382A1 (en) * 2002-02-12 2003-09-04 Honda Giken Kogyo Kabushiki Kaisha FUEL CELL ELECTROCATALYST OF Pt-Rh-Mo-Ni/Fe
CN1630556B (zh) * 2002-02-15 2012-10-03 株式会社Ict 内燃机废气净化用催化剂、其制备方法以及内燃机废气的净化方法
KR100858943B1 (ko) * 2002-06-24 2008-09-17 다나까 기낀조꾸 고교 가부시끼가이샤 개질가스 중의 일산화탄소의 선택적 산화 촉매
JP3951127B2 (ja) * 2003-02-28 2007-08-01 国立大学法人静岡大学 ジメチルエーテル水蒸気改質触媒およびその製造方法
US7341977B2 (en) * 2003-06-20 2008-03-11 Nanoscale Corporation Method of sorbing sulfur compounds using nanocrystalline mesoporous metal oxides
KR100542911B1 (ko) * 2003-10-25 2006-01-11 한국과학기술연구원 연료전지 자동차에 이용되는 가솔린 개질용 저압차 촉매와 이의 제조방법
GB2410449B (en) 2004-01-28 2008-05-21 Statoil Asa Fischer-Tropsch catalysts
DE102004024026A1 (de) * 2004-03-11 2005-09-29 W.C. Heraeus Gmbh Katalysator zur N2O-Zersetzung beim Ostwaldprozess
US20050202966A1 (en) * 2004-03-11 2005-09-15 W.C. Heraeus Gmbh Catalyst for the decomposition of N2O in the Ostwald process
MY142111A (en) * 2004-04-16 2010-09-15 Nippon Oil Corp Catalyst for fischer-tropsch synthesis and process for producing hydrocarbons
EP1632288B1 (en) * 2004-09-03 2012-06-20 Mazda Motor Corporation Exhaust gas purification catalyst and oxygen storage component for the same
NO327431B1 (no) * 2006-09-08 2009-06-29 Yara Int Asa Fremgangsmate og anordning for fangst av platinagruppeelementer
EP2017003A1 (en) * 2007-07-20 2009-01-21 Pall Corporation Catalytic element
GB2473071B (en) 2009-09-01 2013-09-11 Gtl F1 Ag Fischer-tropsch catalysts
GB2475492B (en) 2009-11-18 2014-12-31 Gtl F1 Ag Fischer-Tropsch synthesis
EP2603316B1 (en) 2010-08-09 2017-04-19 Gtl. F1 Ag Fischer-tropsch catalysts
RU2585610C2 (ru) * 2010-11-16 2016-05-27 Стихтинг Энергиондерзук Сентрум Недерланд Катализатор для получения водорода
EP2682206A4 (en) * 2011-03-04 2014-09-17 Toyota Motor Co Ltd METAL PARTS, CATALYST FOR THE PURIFICATION OF PURIFICATION AND MANUFACTURING METHOD THEREFOR
WO2013027677A1 (ja) 2011-08-23 2013-02-28 トヨタ自動車株式会社 排ガス用浄化触媒およびその製造方法
JP6042314B2 (ja) * 2012-12-04 2016-12-14 本田技研工業株式会社 カーボンナノチューブ成長用基板及びその製造方法
US10343148B2 (en) * 2016-12-01 2019-07-09 Southern Research Institute Mixed metal oxide catalysts and methods for olefin production in an oxidative dehydrogenation reaction process
GR1009531B (el) 2018-03-20 2019-05-23 Μονολιθος Καταλυτες & Ανακυκλωση Επε Πολυμεταλλικοι καταλυτες χαλκου και ευγενων μεταλλων για επεξεργασια απαεριων κινητηρων
CN111167446B (zh) * 2020-02-26 2022-09-20 安徽正洁高新材料股份有限公司 一种铂金催化剂及其制备方法
CN111921541B (zh) * 2020-09-17 2021-06-22 中南大学 一种铂铁合金催化剂及其制备方法和在VOCs催化氧化中的应用

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Publication number Priority date Publication date Assignee Title
US2965583A (en) * 1957-10-14 1960-12-20 Oxy Catalyst Inc Catalytic structure
US3437605A (en) * 1965-01-26 1969-04-08 Engelhard Ind Inc Method of preparing a supported catalyst
US3489809A (en) * 1968-04-17 1970-01-13 Engelhard Min & Chem Selective hydrogenation with a catalyst on a honeycomb support
FR1588876A (sv) * 1968-09-03 1970-03-16
GB1305137A (sv) * 1969-02-10 1973-01-31

Also Published As

Publication number Publication date
FR2130310A1 (sv) 1972-11-03
NL173825B (nl) 1983-10-17
NL7203388A (sv) 1972-09-19
JPS5645651B1 (sv) 1981-10-28
CA1002731A (en) 1977-01-04
DE2212616A1 (de) 1972-09-28
GB1390182A (en) 1975-04-09
NL173825C (nl) 1984-03-16
IT950251B (it) 1973-06-20
FR2130310B1 (sv) 1974-09-13
BE780767A (fr) 1972-07-17
US3840471A (en) 1974-10-08

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