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131. 发明专利

JPH11229051A METHOD FOR REMOVING PLATINUM AND PALLADIUM 失效
公开(公告)号：JPH11229051A
公开(公告)日：1999-08-24
申请号：JP3704398
申请日：1998-02-19
申请人： MITSUBISHI MATERIALS CORP
发明人： OKADA SATOSHI , MOCHIDA HIROMI
IPC分类号： C01G55/00 , C22B3/44 , C22B7/00 , C22B11/00
摘要： PROBLEM TO BE SOLVED: To easily and efficiently remove Pt and Pd by regulating the pH of a soln. of nitric acid contg. Pt and/or Pd to specified value in an acidic region, thereafter adding potassium permanganate thereto and precipitating and removing these compds. SOLUTION: Since Pt and Pd are dissolved as nitrous acid complex ions in a leach liq. of nitric acid, potassium permanganate is used and the nitrous acid complex ions are oxidized to produce the precipitations of Pt and Pd, and they are separated to remove. The potassium permanganate is added preferably by 6 to 24 molar times quantity to the content of Pt in the soln. and by 4 to 14 molar times quantity to the content of Pd. At the time of the addition, the pH of the soln. of nitric acid is regulated to >=1, preferably, to 2 to 5. Since, ordinarily, the pH of the leach liq. of nitric acid of copper slime is =80 deg.C.

132. 发明专利

JPH11209127A PRODUCTION OF RUTHENIUM NITRATE 失效
公开(公告)号：JPH11209127A
公开(公告)日：1999-08-03
申请号：JP4612698
申请日：1998-01-23
申请人： SCM KK
发明人： SAKAMOTO MASAMI , HAYASHI TAKAYA
IPC分类号： C01G55/00
摘要： PROBLEM TO BE SOLVED: To easily obtain high purity ruthenium nitrate contg. no halogen at all in a high yield by allowing ruthenium tetroxide to react with nitric acid in the presence of a reducing agent. SOLUTION: Ruthenium tetroxide is allowed to react with nitric acid in the presence of a reducing agent. It is preferable that the reducing agent can reduce octavalent Ru to tri- or tetra-valent Ru, is finally decomposed and does not remain in the reaction system. The reducing agent is, e.g. a lower mono- or poly-hydric alcohol or a lower fatty acid, and methanol, ethylene glycol or oxalic acid is preferably used. The reducing agent is finally removed as CO2 from the reaction system. The pref. amt. of the nitric acid is about 3-30 mol based on 1 mol Ru and an aq. nitric acid soln. having about 3-14N concn. may be used. The reducing agent is added by about 0.1-1 mol based on 1 mol Ru in the case of ethylene glycol. The reaction is efficiently carried out under heating to the room temp.-60 deg.C.

133. 发明专利

JPH11121702A THIN FILM MATERIAL, MANUFACTURE THEREOF, DIELECTRIC CAPACITOR AND MANUFACTURE THEREOF 失效
公开(公告)号：JPH11121702A
公开(公告)日：1999-04-30
申请号：JP28038297
申请日：1997-10-14
申请人： SONY CORP
发明人： KATORI KENJI , HIRONAKA KATSUYUKI , SUGIYAMA MASATAKA , ISOBE CHIHARU , WATABE KOJI
IPC分类号： C01G55/00 , C22C29/12 , H01L21/822 , H01L21/8242 , H01L21/8246 , H01L21/8247 , H01L27/04 , H01L27/10 , H01L27/105 , H01L27/108 , H01L29/788 , H01L29/792
摘要： PROBLEM TO BE SOLVED: To provide a thin film material suitable for the lower electrode material of a dielectric capacitor, to provide its manufacturing method, to provide a dielectric capacitor where the above-mentioned thin film material is used for the lower electrode, and to provide its manufacturing method. SOLUTION: As the material of the lower electrode of a dielectric capacitor, a first thin film 2 made of a material whose composition is expressed by the compositional formula Pda (Rh100-x-y-z Ptx Iry Ruz )b Oc (where a, b, c, x, y and z are numbers of atomic %) and having the ranges are 20

134. 发明专利

JPH1192150A PREPARATION OF PLATINUM NITRATE SOLUTION 失效
公开(公告)号：JPH1192150A
公开(公告)日：1999-04-06
申请号：JP25475497
申请日：1997-09-19
申请人： TANAKA PRECIOUS METAL IND
发明人： SHIBAZAKI TAKUO
IPC分类号： C01G55/00 , B01J23/42
摘要： PROBLEM TO BE SOLVED: To easily prepare a platinum nitrate soln. having stability over a long period of time by adding nitric acid having a specified concn. to hydroxyplatinic acid by the sum of the amt. required to dissolve the hydroxyplatinic acid and the amt. required to stabilize the resultant platinum nitrate and dissolving the hydroxyplatinic acid. SOLUTION: Acetic acid is added to a hexahydroxopotassium platinum soln. and a formed precipitate is separated by filtration and washed to prepare hydroxyplatinic acid. Nitric acid having ∞300 g/L concn. is added to the hydroxyplatinic acid by about 8 times (mol) the amt. of platinum as the sum of about 6 times (mol) the amt. of platinum as the amt. required to dissolve the hydroxyplatinic acid and about 2 times (mol) the amt. of platinum as the amt. required to stabilize the resultant platinum nitrate soln. They are heated to about 50-100 deg.C under atmospheric pressure and the hydroxyplatinic acid is perfectly dissolved by stirring. After cooling, nitric acid is properly added to attain a prescribed concn. and the objective platinum nitrate soln. causing no change in the state even after storage for >=1 month is obtd.

135. 发明专利

JPH1147595A MANUFACTURE OF ELECTRODE CATALYST POWDER 失效
公开(公告)号：JPH1147595A
公开(公告)日：1999-02-23
申请号：JP20797397
申请日：1997-08-01
申请人： MATSUSHITA ELECTRIC IND CO LTD
发明人： YASUMOTO EIICHI , GYOTEN HISAAKI , HADO KAZUHITO , NIIKURA JUNJI , GAMO KOJI , ITO NOBUHISA
IPC分类号： B01J23/42 , B01J23/46 , B01J37/03 , C01G55/00 , C25B11/12 , H01M4/92 , H01M8/04
摘要： PROBLEM TO BE SOLVED: To manufacture electrode catalyst powder supporting very fine platinum particles efficiently in large quantities by a method wherein after adjusting pH of dispersion of colloid particle generated by adding solution, the collid particle is deposited on a conductive carbon substrate. SOLUTION: When electrode catalyst powder is manufactured, platinum complex compound aqueous solution A is manufactured by, for example, dissolving 28g of sodium hydrogen sulfite in 0.4 l of chloroplatinum acid aqueous solution of 5 g/l platinum concentration. Then, after diluting the aqueous solution A with water, dispersion B is prepared by mixing by dropping 0.2 l of 31% hydrogen peroxide aqueous solution, and pH of the dispersion B is adjusted to 6 or higher by use of sodium hydroxide aqueous solution. Then, dispersion C is prepared by dispersing 5g of carbon powder into 0.3 l of water, and dispersion D is obtained by mixing the dispersions B and C. After preparing pH 5 of the dispersion D by use of dilute sulfuric acid, it is boiled by heating during' stirring, the dispersion D is filtered thereafter, and catalyst powder is obtained by drying.

136. 发明专利

JPH1135589A PRODUCTION OF BIS(ALKYLCYCLOPENTADIENYL) RUTHENIUM COMPLEX AND PRODUCTION OF RUTHENIUM-CONTAINING THIN FILM USING THE SAME 失效
公开(公告)号：JPH1135589A
公开(公告)日：1999-02-09
申请号：JP22549397
申请日：1997-07-17
申请人： KOJUNDO KAGAKU KENKYUSHO KK
发明人： KADOKURA HIDEKIMI
IPC分类号： C01G55/00 , C07F15/00 , C07F17/02 , C23C16/18
摘要： PROBLEM TO BE SOLVED: To produce a ruthenium compound which is a liquid at ambient temperature for prepating an Ru or an RuO2 film as a thin film for electrodes of a semiconductor device according to a chemical vapor deposition(CVD) method and to provide a method for producing the ruthenium compound. SOLUTION: This bis (ethylcyclopentadienyl) ruthenium or bis (isopropylcyclopentadienyl) ruthenium is a liquid at ambient temperature and has a sufficient vapor pressure at about 100 deg.C. Thereby, the compound as a CVD raw material can quantitatively be fed by gas bubbling or a liquid mass flow controller and thermally decomposed on a substrate at 600 deg.C in a hydrogen atmosphere to form a pure Ru thin film. The compound can be produced in high yield by reacting ruthenium trichloride hydrate with ethylcyclopentadiene or isopropylcyclopentadiene and zinc powder in an alcohol solvent at a temperature within the range of -30 to 0 deg.C.

137. 发明专利

JPH10273327A PRODUCTION OF RUTHENIUM TETRAOXIDE 失效
公开(公告)号：JPH10273327A
公开(公告)日：1998-10-13
申请号：JP7558397
申请日：1997-03-27
申请人： MITSUBISHI GAS CHEMICAL CO
发明人： WAKABAYASHI HIDECHIKA , TAKAHASHI TORU
IPC分类号： C01G55/00
摘要： PROBLEM TO BE SOLVED: To easily produce ruthenium tetraoxide without causing the problems of the generation and removal of by-products by oxidizing ruthenium metal or a specific ruthenium compound with ozone. SOLUTION: A ruthenium compound selected from ruthenium metal, ruthenium metal/carrier, ruthenium dioxide, a ruthenium trihalide, ruthenium sulfate and a ruthenium complex is dissolved in water, a solvent stable to ruthenium tetraoxide, ozone and oxygen used as an oxidizing agent or a mixed solvent stable to water and oxidizing agent. Ozone/air or ozone/oxygen generated by an ozonizer is passed through the solution under stirring and the ruthenium compound is oxidized at pH

138. 发明专利

JP2805691B2 失效
公开(公告)号：JP2805691B2
公开(公告)日：1998-09-30
申请号：JP15021690
申请日：1990-06-08
IPC分类号： C01G55/00

139. 发明专利

JPH10218624A PRODUCTION OF TETRAAMMINE PLATINUM (II) DICHLORIDE CRYSTAL 失效
公开(公告)号：JPH10218624A
公开(公告)日：1998-08-18
申请号：JP2259097
申请日：1997-02-05
申请人： TANAKA PRECIOUS METAL IND
发明人： SHIBAZAKI TAKUO
IPC分类号： C01G55/00 , B01J23/42
摘要： PROBLEM TO BE SOLVED: To obtain an impurity-free tetraammine platinum (II) dichloride crystal by adding aqueous ammonia to an aqueous solution of tetraammine platinum (II) dichloride, concentrating the solution, as its ammonia alkalinity is maintained, filtering and drying the precipitate. SOLUTION: In an autoclave, chloroplatinic acid or its salt is allowed to react with aqueous ammonia at 110-130 deg.C for 16-18 hours. Hydrochloric acid is added to the resultant tetraammine Pt(II) dichloride and they are heated under reflux for 17-19 hours to precipitate trans-dichlorodiammine Pt(II). This precipitate is filtered, washed, combined with aqueous ammonia to effect the reaction at 75-85 deg.C for 1-2 hours to prepare an aqueous solution of tetraammine Pt(II) dichloride. Then, aqueous ammonia is added to the tetraammine Pt(II) dichloride solution, the mixture is concentrated with heat, as it is kept ammonium-alkal side, then subjected to filtration and drying.

140. 发明专利

JP2777677B2 失效
公开(公告)号：JP2777677B2
公开(公告)日：1998-07-23
申请号：JP41072490
申请日：1990-12-13
申请人： KOGYO GIJUTSU INCHO , SHINNIPPON SEITETSU KK
发明人： SATO YOSHUKI , KOBAYASHI MASANORI
IPC分类号： C01G55/00 , C23C8/02 , C23C8/12 , C23F17/00 , C25B11/04 , C25B11/08 , C25B11/10 , C25F1/08

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