JPS6139398B2 - - Google Patents
Info
- Publication number
- JPS6139398B2 JPS6139398B2 JP54019147A JP1914779A JPS6139398B2 JP S6139398 B2 JPS6139398 B2 JP S6139398B2 JP 54019147 A JP54019147 A JP 54019147A JP 1914779 A JP1914779 A JP 1914779A JP S6139398 B2 JPS6139398 B2 JP S6139398B2
- Authority
- JP
- Japan
- Prior art keywords
- cathode
- nickel
- molybdate
- iron
- temperature
- Prior art date
- Legal status (The legal status 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 status listed.)
- Expired
Links
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 claims description 37
- 229910052759 nickel Inorganic materials 0.000 claims description 17
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 12
- 239000000203 mixture Substances 0.000 claims description 9
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 claims description 7
- 239000007864 aqueous solution Substances 0.000 claims description 7
- 239000003054 catalyst Substances 0.000 claims description 7
- 238000010438 heat treatment Methods 0.000 claims description 7
- 239000001257 hydrogen Substances 0.000 claims description 7
- 229910052739 hydrogen Inorganic materials 0.000 claims description 7
- MEFBJEMVZONFCJ-UHFFFAOYSA-N molybdate Chemical group [O-][Mo]([O-])(=O)=O MEFBJEMVZONFCJ-UHFFFAOYSA-N 0.000 claims description 7
- 229910052742 iron Inorganic materials 0.000 claims description 6
- 238000000034 method Methods 0.000 claims description 6
- 238000004519 manufacturing process Methods 0.000 claims description 5
- 229910052751 metal Inorganic materials 0.000 claims description 5
- 239000002184 metal Substances 0.000 claims description 5
- 239000004020 conductor Substances 0.000 claims description 4
- 239000000243 solution Substances 0.000 claims description 4
- 150000002751 molybdenum Chemical class 0.000 claims description 2
- 229910000476 molybdenum oxide Inorganic materials 0.000 claims description 2
- PQQKPALAQIIWST-UHFFFAOYSA-N oxomolybdenum Chemical compound [Mo]=O PQQKPALAQIIWST-UHFFFAOYSA-N 0.000 claims description 2
- 150000003839 salts Chemical class 0.000 claims description 2
- 238000005979 thermal decomposition reaction Methods 0.000 claims description 2
- 238000007598 dipping method Methods 0.000 claims 1
- JKQOBWVOAYFWKG-UHFFFAOYSA-N molybdenum trioxide Chemical compound O=[Mo](=O)=O JKQOBWVOAYFWKG-UHFFFAOYSA-N 0.000 description 4
- APUPEJJSWDHEBO-UHFFFAOYSA-P ammonium molybdate Chemical compound [NH4+].[NH4+].[O-][Mo]([O-])(=O)=O APUPEJJSWDHEBO-UHFFFAOYSA-P 0.000 description 3
- 229940010552 ammonium molybdate Drugs 0.000 description 3
- 235000018660 ammonium molybdate Nutrition 0.000 description 3
- 239000011609 ammonium molybdate Substances 0.000 description 3
- 239000003792 electrolyte Substances 0.000 description 3
- MVFCKEFYUDZOCX-UHFFFAOYSA-N iron(2+);dinitrate Chemical compound [Fe+2].[O-][N+]([O-])=O.[O-][N+]([O-])=O MVFCKEFYUDZOCX-UHFFFAOYSA-N 0.000 description 3
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 2
- 239000003637 basic solution Substances 0.000 description 2
- QXYJCZRRLLQGCR-UHFFFAOYSA-N dioxomolybdenum Chemical compound O=[Mo]=O QXYJCZRRLLQGCR-UHFFFAOYSA-N 0.000 description 2
- 238000005868 electrolysis reaction Methods 0.000 description 2
- KBJMLQFLOWQJNF-UHFFFAOYSA-N nickel(ii) nitrate Chemical compound [Ni+2].[O-][N+]([O-])=O.[O-][N+]([O-])=O KBJMLQFLOWQJNF-UHFFFAOYSA-N 0.000 description 2
- 239000001301 oxygen Substances 0.000 description 2
- 229910052760 oxygen Inorganic materials 0.000 description 2
- 238000005245 sintering Methods 0.000 description 2
- 238000011282 treatment Methods 0.000 description 2
- 229920002134 Carboxymethyl cellulose Polymers 0.000 description 1
- 239000001768 carboxy methyl cellulose Substances 0.000 description 1
- 235000010948 carboxy methyl cellulose Nutrition 0.000 description 1
- 239000008112 carboxymethyl-cellulose Substances 0.000 description 1
- NLPVCCRZRNXTLT-UHFFFAOYSA-N dioxido(dioxo)molybdenum;nickel(2+) Chemical compound [Ni+2].[O-][Mo]([O-])(=O)=O NLPVCCRZRNXTLT-UHFFFAOYSA-N 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000007654 immersion Methods 0.000 description 1
- 238000005470 impregnation Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 238000002791 soaking Methods 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
- 238000004227 thermal cracking Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
- C25B—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES FOR THE PRODUCTION OF COMPOUNDS OR NON-METALS; APPARATUS THEREFOR
- C25B11/00—Electrodes; Manufacture thereof not otherwise provided for
- C25B11/04—Electrodes; Manufacture thereof not otherwise provided for characterised by the material
- C25B11/051—Electrodes formed of electrocatalysts on a substrate or carrier
- C25B11/073—Electrodes formed of electrocatalysts on a substrate or carrier characterised by the electrocatalyst material
-
- 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
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/30—Hydrogen technology
- Y02E60/36—Hydrogen production from non-carbon containing sources, e.g. by water electrolysis
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Electrodes For Compound Or Non-Metal Manufacture (AREA)
- Electrolytic Production Of Non-Metals, Compounds, Apparatuses Therefor (AREA)
- Electrolytic Production Of Metals (AREA)
- Powder Metallurgy (AREA)
Description
【発明の詳細な説明】
本発明は、アノードで酸素を発生しかつアソー
ドでは水素を発生させる種類の塩基溶液、特に水
溶液を電気分解する装置用のカソードに係わる。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a cathode for an apparatus for the electrolysis of basic solutions, especially aqueous solutions, of the type that generates oxygen at the anode and hydrogen at the anode.
さらに、本発明はこのような電極の製造に好適
な方法に係わる。 Furthermore, the invention relates to a method suitable for manufacturing such an electrode.
常温、常圧または常温、常圧よりも高い温度、
圧力で作動する公知の電解装置では、作動特性は
時間を関数として変動し、特に電解装置が要求す
る電圧について変動がある。 Normal temperature, normal pressure or normal temperature, temperature higher than normal pressure,
In known electrolyzers that operate with pressure, the operating characteristics vary as a function of time, particularly with respect to the voltage required by the electrolyzer.
塩基性の電解液を使用する場合において、この
ような変動は電極、特にカソードの構造における
変化に由来するものであり、これらの変化は特に
電解を常温よりも高い温度で実施する際には前記
電解液の作用によるものである。 When using basic electrolytes, these variations result from changes in the structure of the electrodes, especially the cathode, and these changes are particularly important when electrolysis is carried out at temperatures higher than room temperature. This is due to the action of the electrolyte.
本発明は上記欠点を解消することを目的とする
ものであつて、塩基性溶液を電気分解する装置の
使用に係わり、本発明によるカソードは非常に優
れた作動安定性、長時間の作動寿命および最少の
電力消費率を有する。 The present invention aims to eliminate the above-mentioned drawbacks, and relates to the use of a device for electrolyzing basic solutions.The cathode according to the present invention has excellent operational stability, long operational life and Has the lowest power consumption rate.
したがつて、本発明は、触媒を含浸した焼結ニ
ツケルを含有する多孔性導電物質でなる電解装置
用のカソードにおいて、前記触媒はニツケル、鉄
およびこれらの混合物でなる群から選ばれる少な
くとも１種類の金属のモリブデン酸塩であること
を特徴とするカソードを提供するものである。 Therefore, the present invention provides a cathode for an electrolytic device made of a porous conductive material containing sintered nickel impregnated with a catalyst, wherein the catalyst is at least one selected from the group consisting of nickel, iron, and mixtures thereof. The present invention provides a cathode characterized in that the cathode is a molybdate of a metal.
好適には、前記モリブデン酸塩と焼結ニツケル
との間の重量比は実質的に20ないし40％である。 Preferably, the weight ratio between said molybdate and sintered nickel is substantially between 20 and 40%.
本発明は、このような触媒をカソードに含浸さ
せる方法にも係わる。該方法は、熱分解により酸
化モリブデンり変化しうるモリブデンの可溶性誘
導体、好ましくはモリブデン酸アンモニウムの水
溶液中にカソードを構成する焼結ニツケル支持体
を浸漬し、ついで非還元性雰囲気、好ましくは空
気中で温度200ないし900℃、好ましくは450℃で
加熱し、さらにニツケルおよび鉄の中から選ばれ
る金属の塩、好ましくは硝酸ニツケルまたは硝酸
鉄またはこれらの混合物の溶液中に前記支持体を
浸漬し、その後、水素雰囲気中で温度約450℃で
加熱処理することにより焼結ニツケル支持体への
触媒の含浸を行なうことを特徴とする。 The invention also relates to a method of impregnating a cathode with such a catalyst. The method involves immersing the sintered nickel support constituting the cathode in an aqueous solution of a soluble derivative of molybdenum, preferably ammonium molybdate, which can be converted into molybdenum oxide by thermal decomposition, and then immersing it in a non-reducing atmosphere, preferably air. heating at a temperature of 200 to 900° C., preferably 450° C., and further immersing the support in a solution of a metal salt selected from nickel and iron, preferably nickel nitrate or iron nitrate or a mixture thereof; Thereafter, the sintered nickel support is impregnated with the catalyst by heat treatment at a temperature of about 450° C. in a hydrogen atmosphere.
本発明の他の特徴および利点は以下の記載より
明らかになると思われるが、これは説明のための
ものであつて、本発明はこれらに限定されない。 Other features and advantages of the invention will become apparent from the following description, which is intended to be illustrative and not intended to limit the invention.
本発明によれば、カソードは以下の如くして調
製できる。 According to the invention, the cathode can be prepared as follows.
ニツケル粉末 1000ｇ
カルボキシメチルセルロース 14.5ｇ
水 １
まず上記組成の混合物を調製する。使用するニ
ツケル粉末の粒子サイズは５ミクロン程度であつ
て、ニツケルテトラカルボニル（Ni（CO）1）のサ
ーマルクラツキングにより得たものである。 Nickel powder 1000g Carboxymethyl cellulose 14.5g Water 1 First, a mixture having the above composition is prepared. The particle size of the nickel powder used is about 5 microns and is obtained by thermal cracking of nickel tetracarbonyl (Ni(CO) 1 ).
このようにして粘稠なペーストを得たのち、た
とえばステンレススチール製の導電性エキスパン
デツドプレート上に塗布する。 After obtaining a viscous paste in this way, it is applied onto an electrically conductive expanded plate made of stainless steel, for example.
乾燥後、水素雰囲気中で温度800ないし1000℃
で10分ないし１時間焼結を行ない、この間温度が
上昇または低下することがないように維持する。
好適な具体例によれば、焼結温度を30分間950℃
に維持して実施する。 After drying, temperature 800 to 1000℃ in hydrogen atmosphere
Sintering is carried out for 10 minutes to 1 hour, during which time the temperature is maintained so as not to rise or fall.
According to a preferred embodiment, the sintering temperature is 950°C for 30 minutes.
Maintain and implement.
ついで、このようにして得た支持体について含
浸処理を行なう。 Then, the support thus obtained is subjected to an impregnation treatment.
この目的のために、前記支持体を三酸化モリブ
デン２モル／に等しい濃度のモリブデン酸アン
モニウム（加熱時二酸化モリブデンまたは三酸化
モリブデンに分解する）水溶液中に浸漬する。浸
漬後、支持体を空気中で温度200ないし900℃で１
ないし２時間加熱する。 For this purpose, the support is immersed in an aqueous solution of ammonium molybdate (which decomposes on heating to molybdenum dioxide or molybdenum trioxide) at a concentration equal to 2 mol/mol of molybdenum trioxide. After soaking, the support is heated in air at a temperature of 200 to 900°C.
Heat for up to 2 hours.
ついで、この支持体を硝酸ニツケルまたは硝酸
鉄またはこれらの混合物中に浸漬し、その後、水
素雰囲気中で温度約450℃で加熱処理を行なう。 The support is then immersed in nickel nitrate or iron nitrate or a mixture thereof, followed by heat treatment at a temperature of about 450° C. in a hydrogen atmosphere.
他の変形法によれば、これら２つの浸漬処理
を、モリブデン酸アンモニウムと硝酸ニツケルま
たは硝酸鉄またはこれらの混合物とを混合した水
溶液中で同時に行なうようにしてもよい。また、
非還元性雰囲気中で加熱する以前に低温で凍結す
る溶液を原料として支持体を低温、減圧下で凍結
乾燥させることを有利である。 According to another variant, these two immersion treatments can be carried out simultaneously in an aqueous solution of ammonium molybdate and nickel or iron nitrate or a mixture thereof. Also,
It is advantageous to lyophilize the support at low temperature and under reduced pressure starting from a solution that freezes at low temperature before heating in a non-reducing atmosphere.
このようにしてカソードが得られるが、これは
水素および酸素を製造するための塩基性水溶液の
電解装置での使用に好適である。 A cathode is thus obtained, which is suitable for use in electrolyzers of basic aqueous solutions for the production of hydrogen and oxygen.
本発明によれば、このようなカソードはモリブ
デン酸ニツケルまたはモリブデン酸鉄またはこれ
らの混合物を、該モリブデン酸塩とニツケルとの
間の重量比が実質的に70ないし40％となる量で含
浸する多孔度約30ないし50％の焼結ニツケルでな
る。 According to the invention, such a cathode is impregnated with nickel molybdate or iron molybdate or a mixture thereof in an amount such that the weight ratio between said molybdate and nickel is substantially 70 to 40%. It is made of sintered nickel with a porosity of about 30 to 50%.
この電極は電解装置の安定した作動を提供で
き、特に160℃程度の温度では塩基性電解液によ
る腐食作用を受けることなく、一方、有利な安定
性特性を保持したまま作動できる。 This electrode is able to provide a stable operation of the electrolyzer, in particular at temperatures of the order of 160° C., without being subjected to corrosive effects by the basic electrolyte, while still retaining its advantageous stability properties.
アノードとしては公知の種類のものでよいが、
たとえば特公昭60―4915号に開示された種類のも
のでよい。 The anode may be of a known type, but
For example, the type disclosed in Japanese Patent Publication No. 60-4915 may be used.
明確に認識するために、上記発明によるアノー
ドを使用する電解装置にこのカソードを使用した
ところ、100日間作動させたのちにも何ら変化は
見られなかつた。 For clarity, when this cathode was used in an electrolyzer using the anode according to the invention, no changes were observed after 100 days of operation.
本発明による電解装置はアルカリ水溶液を電気
分解することにより水素を製造する際に有利に応
用できる。 The electrolyzer according to the present invention can be advantageously applied to the production of hydrogen by electrolyzing an alkaline aqueous solution.
以上本発明をその具体例について詳述したが、
本発明はこの特定の実施例に限定されるものでは
なく、本発明の精神を逸脱しないで幾多の変化変
形がなし得ることはもちろんである。 The present invention has been described in detail with respect to specific examples thereof, but
It goes without saying that the invention is not limited to this particular embodiment, and that many changes and modifications may be made without departing from the spirit of the invention.
Claims (1)
性導電物質でなる電解装置用のカソードにおい
て、前記媒触はニツケル、鉄およびこれらの混合
物でなる群から選ばれる少なくとも１種類の金属
のモリブデン酸塩であることを特徴とする、電解
装置用のカソード。 ２ モリブデン酸塩と焼結ニツケルとの重量比は
実質的に20にいし40％であることを特徴とする特
許請求の範囲第１項記載のカソード。 ３ 多孔性導電物質の多孔度は実質的に30ないし
50％であることを特徴とする特許請求の範囲第１
項または第２項に記載のカソード。 ４ ニツケル、鉄およびこれらの混合物でなる群
から選ばれる少なくとも１種類の金属のモリブデ
ン酸塩でなる触媒を含浸した焼結ニツケルを含有
する多孔性導電物質でなる電解装置用のカソード
の製法において、熱分解により酸化モリブデンに
変化しうるモリブデンの可溶性誘導体の水溶液中
にカソードを構成する焼結ニツケル支持体を浸漬
し、ついで非還元性雰囲気中で温度200ないし900
℃において加熱し、さらにニツケルおよび鉄の中
から選ばれる金属の少なくとも１種類の塩の溶液
中に前記支持体を浸漬し、その後、水素雰囲気中
で温度約450℃において加熱処理することを特徴
とする、電解装置用のカソードの製法。 ５ 第１回目および第２回目の浸漬操作を非還元
性雰囲気中で加熱する以前に同時に行なうことを
特徴とする特許請求の範囲第４項記載の方法。 ６ 非還元性雰囲気中での加熱処理以前に、構造
体を低温で凍結する溶液を使用して減圧下で凍結
乾燥させることを特徴とする特許請求の範囲第４
項または第５項記載の方法。[Claims] 1. A cathode for an electrolytic device made of a porous conductive material containing sintered nickel impregnated with a catalyst, wherein the catalyst is at least one selected from the group consisting of nickel, iron, and mixtures thereof. A cathode for an electrolyzer, characterized in that it is a molybdate of a metal of various types. 2. A cathode according to claim 1, characterized in that the weight ratio of molybdate to sintered nickel is substantially between 20 and 40%. 3. The porosity of the porous conductive material is substantially between 30 and 30.
Claim 1 characterized in that 50%
The cathode according to item 1 or item 2. 4. A method for producing a cathode for an electrolytic device made of a porous conductive material containing sintered nickel impregnated with a catalyst made of a molybdate of at least one metal selected from the group consisting of nickel, iron and mixtures thereof, The sintered nickel support constituting the cathode is immersed in an aqueous solution of a soluble derivative of molybdenum that can be converted to molybdenum oxide by thermal decomposition, and then heated at a temperature of 200 to 900°C in a non-reducing atmosphere.
℃, further immersing the support in a solution of at least one salt of a metal selected from nickel and iron, and then heat-treating at a temperature of about 450℃ in a hydrogen atmosphere. A method for manufacturing cathodes for electrolyzers. 5. The method according to claim 4, wherein the first and second dipping operations are performed simultaneously before heating in a non-reducing atmosphere. 6. Claim 4, characterized in that prior to the heat treatment in a non-reducing atmosphere, the structure is freeze-dried under reduced pressure using a solution that freezes at a low temperature.
or the method described in paragraph 5.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR7805662A FR2418281A1 (en) | 1978-02-28 | 1978-02-28 | CATHODE FOR ELECTROLYZER |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS54123582A JPS54123582A (en) | 1979-09-25 |
| JPS6139398B2 true JPS6139398B2 (en) | 1986-09-03 |
Family
ID=9205151
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1914779A Granted JPS54123582A (en) | 1978-02-28 | 1979-02-22 | Cathod for electrolysis apparatus and its manufacture |
Country Status (6)
| Country | Link |
|---|---|
| JP (1) | JPS54123582A (en) |
| DE (1) | DE2906927A1 (en) |
| FR (1) | FR2418281A1 (en) |
| GB (1) | GB2015579B (en) |
| IT (1) | IT1164927B (en) |
| OA (1) | OA06191A (en) |
Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| IN153057B (en) | 1978-09-21 | 1984-05-26 | British Petroleum Co | |
| US4248679A (en) * | 1979-01-24 | 1981-02-03 | Ppg Industries, Inc. | Electrolysis of alkali metal chloride in a cell having a nickel-molybdenum cathode |
| US4410413A (en) | 1981-10-05 | 1983-10-18 | Mpd Technology Corporation | Cathode for electrolytic production of hydrogen |
| FR2565257A1 (en) * | 1984-05-29 | 1985-12-06 | Comp Generale Electricite | CATALYST FOR ELECTROLYSER BASIC SOLUTIONS |
| DE3612790A1 (en) * | 1986-04-16 | 1987-10-22 | Sigri Gmbh | Cathode for aqueous electrolysis |
| FR2994198B1 (en) | 2012-08-03 | 2015-02-20 | Centre Nat Rech Scient | COMPOSITE ELECTRODES FOR ELECTROLYSIS OF WATER. |
| KR20230122581A (en) * | 2020-12-23 | 2023-08-22 | 미쓰이금속광업주식회사 | Nickel powder, its manufacturing method, conductive composition and conductive film |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR1347316A (en) * | 1961-12-28 | 1963-12-27 | Ici Australia Ltd | electrodes for electrolytic cells |
| US3393100A (en) * | 1965-10-01 | 1968-07-16 | Gen Electric | Process of generating electrical energy utilizing a fuel containing carbon monoxide and a fuel cell electrode structure therefor, comprising a carbon-monoxide resistant electrode body |
| FR1592294A (en) * | 1968-11-18 | 1970-05-11 | ||
| US4033837A (en) * | 1976-02-24 | 1977-07-05 | Olin Corporation | Plated metallic cathode |
-
1978
- 1978-02-28 FR FR7805662A patent/FR2418281A1/en active Granted
-
1979
- 1979-01-24 IT IT67155/79A patent/IT1164927B/en active
- 1979-01-29 GB GB7903049A patent/GB2015579B/en not_active Expired
- 1979-02-22 JP JP1914779A patent/JPS54123582A/en active Granted
- 1979-02-22 DE DE19792906927 patent/DE2906927A1/en active Granted
- 1979-02-26 OA OA56742A patent/OA06191A/en unknown
Also Published As
| Publication number | Publication date |
|---|---|
| IT7967155A0 (en) | 1979-01-24 |
| GB2015579A (en) | 1979-09-12 |
| DE2906927A1 (en) | 1979-08-30 |
| JPS54123582A (en) | 1979-09-25 |
| FR2418281B1 (en) | 1983-03-18 |
| FR2418281A1 (en) | 1979-09-21 |
| GB2015579B (en) | 1982-08-04 |
| IT1164927B (en) | 1987-04-15 |
| DE2906927C2 (en) | 1987-07-02 |
| OA06191A (en) | 1981-06-30 |
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