baber/WOPTO huggingface dataset:
Patent JP-2004193312-A (JP)
Title: Memory cell using resistance variation element and its controlling method
Inventor: OTSUKA TAKASHI
IPC: G11C11/22
Filed: 2002-12-11
Abstract: <P>PROBLEM TO BE SOLVED: To provide a memory cell using a resistance variation element that can be applied easily to the inside of a logic circuit, and to provide a method of controlling the memory cell.  <P>SOLUTION: The memory cell is constituted of a transistor 5 for input provided with a write line 3 connected to the gate of the transistor 5, first and second voltage impressing lines 1 and 2, and an output line 9; the resistance variation element 4 connected to the transistor 5; and an output transistor 7 connected to the intermediate node 6 between the resistance variation element 4 and transistor 5 and on/off-controlled by means of an output control line 8.  <P>COPYRIGHT: (C)2004,JPO&NCIPI
Patent JP-2004194078-A (JP)
Title: Device for transmitting information
Inventor: YOSHITANI AKIHIRO
IPC: H04N1/00
Filed: 2002-12-12
Abstract: <P>PROBLEM TO BE SOLVED: To provide a technology capable of efficiently printing data received by an information transmission device having printing function.  <P>SOLUTION: Data is received via a data modem 108 via a communication line. Data received are stored in a RAM 104. When the received data are printed by a printer 105, a CPU 102 analyzes the number of total pages of the received data, based on printing set information. Then, the CPU 102 displays an operation screen which includes the number of total pages analyzed on a display unit 106.  <P>COPYRIGHT: (C)2004,JPO&NCIPI
Patent JP-2004195322-A (JP)
Title: Soil or ground water treatment method
Inventor: MURASAWA KOICHIRO
IPC: B09C1/10
Filed: 2002-12-17
Abstract: <P>PROBLEM TO BE SOLVED: To provide a soil or ground water treatment method for avoiding secondary pollution effectively by fixing a carbon source at a soil or ground water position as a solid to supply carbon by minute quantity over a long period of time.  <P>SOLUTION: The representative constitution of this soil or ground water treatment method is set so that the carbon source, which contains a specific number of carbon atoms and has a specific molecular structure, and a water absorbing material with a specific water absorption are allowed to coexist and a means which performs stirring in soil or ground water is provided. As the carbon source, a specific carbon source, which has biodegradability, contains a specific number of carbon atoms and has a specific molecular structure is selected to be used in such a state that the carbon source and the water absorbing material are allowed to coexist. As a carbon source which is solid on the ground and insoluble in water, an ester of a 14C or more straight chain saturated fatty acid and a monohydric alcohol is used.  <P>COPYRIGHT: (C)2004,JPO&NCIPI
Patent JP-2004201730-A (JP)
Title: Generating method of three-dimensional profile using projection image in two or more directions
Inventor: OIKAWA MICHIO
IPC: A61B6/02
Filed: 2002-12-24
Abstract: <P>PROBLEM TO BE SOLVED: To settle an inconvenience that time series data becomes extensive and a processing load becomes high when a movement of a three-dimensional profile is required using an image of a body in motion such as the heart performing an approximate cyclic movement photographed from the two or more directions.  <P>SOLUTION: The generating method of the three-dimensional profile using the image photographed from the two or more directions includes to extract a blood vessel from a frame image extracted as a pulse corresponding phase from a coronary artery contrast image 1 photographed from the two or more directions (step 100), to automatically extract the blood vessel by presuming a blood vessel traveling rate in a consecutive frame image based on an extraction parameter used in the extraction of the step 100 (step 102), to require a thin line of the blood vessel in the each frame image by extracting the blood vessel from the frame image of one pulse cycle (step 104), to calculate the blood vessel three-dimensional information of one cycle by requiring the correspondence (step 108) and to generate a four-dimensional data 9 of the blood vessel. Thereby, the blood vessel is extracted automatically for all of the image data in the time series when a user extracts the blood vessel from only one frame image so that a reconstruction of the three-dimensional movement of the blood vessel becomes possible.  <P>COPYRIGHT: (C)2004,JPO&NCIPI
Patent JP-2004201942-A (JP)
Title: Air bag apparatus and massage apparatus equipped with the same
Inventor: OTSUKA KENJI
IPC: A61H7/00
Filed: 2002-12-25
Abstract: <P>PROBLEM TO BE SOLVED: To provide an air bag apparatus where an air bag main body is prevented from being obstructive when shrinking it and its miniaturization is realized.  <P>SOLUTION: The air bag apparatus is provided with the air bag main body 21 equipped with an air supply and exhaust opening 23. Air is supplied to and exhausted from the air bag main body 21 through the opening 23 to swell/shrink the air bag main body 21. The air bag main body 21 is folded at an intermediate part 22 to be divided into a first bag part 24 and a second bag part 25. The first bag part 24 and the second bag part 25 are overlapped with each other and communicating with each other at the intermediate part 22.  <P>COPYRIGHT: (C)2004,JPO&NCIPI
Patent JP-2004206444-A (JP)
Title: Individual authentication method and iris authentication device
Inventor: KONDO KENJI
IPC: G06T7/60
Filed: 2002-12-25
Abstract: <P>PROBLEM TO BE SOLVED: To decrease influences of eyelashes upon the authentication precision by simple processing in individual authentication using iris pictures.  <P>SOLUTION: After a boundary of an iris area consisting of an iris periphery, a pupil periphery and upper and lower eyelids positions is detected, a mask area MA is set downwards of the upper eyelid position (a). Then, the mask area MA is eliminated from an area surrounded by an iris area boundary, and the remaining area is defined as an iris area NEA to be used for then authentication (b).  <P>COPYRIGHT: (C)2004,JPO&NCIPI
Patent JP-2004143394-A (JP)
Title: Detergent particle
Inventor: HASUMI KIJI
IPC: C11D17/00
Filed: 2002-12-26
Abstract: <P>PROBLEM TO BE SOLVED: To provide detergent particles that have markedly improved caking resistance, excellent solubility and adhesion of a surface modifier to surfaces of the particles, and provide the production method thereof and a dispersion of fine particles for substrate treatment that is used in the detergent parciles.  <P>SOLUTION: The detergent particles are produced by treating base detergent particles at their surfaces with a substrate treatment fine particle dispersion formed by dispersing the fine particles for substrate treatment in a binder to form the substrate layer including the substrate treatment fine particles on the surface of the base detergent particles before the surface layer is further coated with the surface modifier. The process for producing the detergent particles comprises the step where the base detergent particles are treated with a dispersion of the substrate treatment fine particles in a binder, as a dispersion medium, on the surface to form the substrate layer including the substrate treatment fine particles on the surface of the base detergent particles, and the following step where the resultant particle surfaces are coated with the surface modifier. The fine particle dispersion for the substrate treatment is prepared by dispersing the fine particles for subtrate treatment in a binder.  <P>COPYRIGHT: (C)2004,JPO
Patent JP-2003292990-A (JP)
Title: Anionic surfactant powder
Inventor: SAKUMA YASUMITSU
IPC: C09K23/42
Filed: 2002-12-27
Abstract: <P>PROBLEM TO BE SOLVED: To provide anionic surfactant powder which comprises polyoxylalkylene alkyl ether sulfates and has excellent hard water resistance, excellent low temperature solubility and improved powder characteristics such as improved caking resistance, and to provide a method for producing the same.  <P>SOLUTION: This anionic surfactant powder comprises polyoxylalkylene alkyl ether sulfates having the average alkylene oxide addition mole number of 0.05 to 2, and contains the polyoxylalkylene alkyl ether sulfates having the alkylene oxide addition mole number of ≥4 in an amount of ≤30 wt.% based on the total amount of the anionic surfactants. The anionic surfactant powder preferably further contains a water-soluble inorganic salt. The method for producing the anionic surfactant powder, a detergent composition and a cement additive containing the anionic surfactant powder, respectively are also provided.  <P>COPYRIGHT: (C)2004,JPO
Patent JP-2004210564-A (JP)
Title: Boron/carbon/nitrogen nanotube whose surface layer is coated with boron nitride, and production method therefor
Inventor: BANDO YOSHIO
IPC: B82B1/00
Filed: 2002-12-27
Abstract: <P>PROBLEM TO BE SOLVED: To provide a nanotube which has insulating properties, and whose utilization to a field emission type transistor and a microelectronic circuit is expected.  <P>SOLUTION: The boron/carbon/nitrogen nanotube whose surface layer is coated with boron nitride is obtained by bringing a grain-oriented CN<SB>x</SB>(0<X≤0.1) nanotube into reaction with a powdery combination of boron oxide and copper oxide at a high temperature in a nitrogen atmosphere.  <P>COPYRIGHT: (C)2004,JPO&NCIPI
Patent JP-2004210873-A (JP)
Title: Production process for polyester resin composition and film obtained therefrom
Inventor: KISHINO TOMOYUKI
IPC: C08G63/82
Filed: 2002-12-27
Abstract: <P>PROBLEM TO BE SOLVED: To provide a process for producing a polyethylene-2, 6-naphthalate resin composition which has melt heat stability practically having no problem and an excellent hue while maintaining excellent transparency with a reduced amount of foreign matters derived from a polymerization catalyst in the polymer in producing the polyethylene-2, 6-naphthalate through transesterification and to provide a film obtained therefrom.  <P>SOLUTION: The process for producing the polyethylene-2, 6-naphthalate resin composition uses a naphthalenedicarboxylic acid component containing ≥80 mol% dimethyl naphthalate as a raw material of the polyethylene-2, 6-naphthalate resin. In the process, after the completion of transesterification using a transesterification catalyst, the catalyst is deactivated by the addition of a phosphorus compound A; then, a titanium compound and another phosphorus compound B comprising a phosphonate compound are added as polymerization catalysts to complete polycondensation.  <P>COPYRIGHT: (C)2004,JPO&NCIPI
Patent JP-2004210051-A (JP)
Title: Driving apparatus of traveling vehicle
Inventor: SAKIGAWA SHIGENORI
IPC: B60K17/10
Filed: 2002-12-27
Abstract: <P>PROBLEM TO BE SOLVED: To solve the problem that, in a conventional front-wheel speed-increasing system of a traveling vehicle, the piping structure is complicated because the hydraulic motor for driving the steerable wheels is placed adjacent to the steerable wheels.  <P>SOLUTION: In the traveling vehicle having a transmission for unsteerable wheels provided with the hydraulic pump driven by a power source and the hydraulic motor fluidly connected to the hydraulic pump, the hydraulic motor comprises a unsteerable wheel driving motor 32 and a steerable wheel driving motor 53, and the steerable wheel driving motor 53 is disposed toward steerable wheels 4L and 4R of the unsteerable wheel driving motor 32. With this configuration, since the hydraulic pump and the hydraulic motor are closely disposed in a mission case, main mechanisms using the hydraulic oil can be closely located. The length of the piping can be shortened and the piping structure can be simplified. The hydraulic oil circulates smoothly, thereby improving the cooling efficiency of the hydraulic oil and improving the durability of the pump and the motor.  <P>COPYRIGHT: (C)2004,JPO&NCIPI
Patent JP-2004185583-A (JP)
Title: System for providing waveform analysis data for nucleic acid identification
Inventor: NEMOTO TAKESHI
IPC: G06Q50/22
Filed: 2002-12-05
Abstract: <P>PROBLEM TO BE SOLVED: To provide waveform analysis data consisting of a waveform pattern based on the dissociation curve of a nucleic acid amplification product useful for nucleic acid identification in bio-related business, including new drug creation gene analysis, and proteome analysis and the like, belonging to bacterial, virus, human genome analysis, and plant fields, and tailor-made medical treatment in daily medical care.  <P>SOLUTION: The waveform analysis data at an information-providing site comprises: bonding a nucleotide chain complementary at any specific or non-specific region on nucleic acid in the nucleic acid amplification method to a nucleotide chain with a possibility of having complementarity to the region; storing the waveform pattern of the dissociation curve of the nucleic acid amplification product obtained by using a waveform generating primer annealed at a plurality of regions having similarity to the region. The waveform analysis data is provided to a user connected through the Internet by applying database formation to the waveform pattern aimed at analyzing and diagnosing bacteria, constitution, virus, plant, and the like in accordance with user's attributes. Thus, nucleic acid identification work is expedited.  <P>COPYRIGHT: (C)2004,JPO&NCIPI
Patent JP-2004501126-A (JP)
Title: ジオールおよびポリオールの触媒脱ヒドロキシル化
IPC: C07C29/60
Filed: 2001-06-20
Abstract: 式｛［ＣｐＲｕ（ＣＯ） ２ ］ ２ （μ−Ｈ）｝ ＋ Ｑ − または｛［ＣｐＲｕ（ＣＯ）（ＰＲ’ ３ ）］ ２ （μ−Ｈ）｝ ＋ Ｑ − または｛［ＺＲｕ（Ｌ）］ ２ （μ−Ｈ）｝ ＋ Ｑ − ［式中、Ｑ − が、非配位または弱い配位の非反応性アニオンであり；Ｃｐが、任意に置換されたシクロペンタジエニル基であり；Ｒ’が、水素、アルキル、アリール、およびアリールオキシから選択され；Ｚが、ヒドリドトリス（３，５−ジメチルピラゾリル）ボレートまたはヒドロカルビルヒドリドトリス（３，５−ジメチルピラゾリル）ボレートであり；Ｌが、（ＣＯ） ２ または１，５−シクロオクタジエンである］を有するルテニウム含有触媒前駆物質の存在下にて、第二アルコール、特にジオールおよびポリオールを、水素を用いて対応する第一アルコールに脱ヒドロキシル化する。
Patent JP-2004501697-A (JP)
IPC: B65D83/08
Filed: 2001-06-19
Abstract: The present application relates to a POP-UP wipe dispensing system, comprising a particular wipe folding pattern. The wipes are preferably packaged into a container, which has smaller length and width dimensions than that of the wipe. <IMAGE>
Patent JP-2004502124-A (JP)
Title: 内部分離器を備えるバーナー
IPC: F24C3/08
Filed: 2001-06-15
Abstract: 本発明は、少なくとも２つのガスクラウン（そのうちの１つは中心クラウンであり、少なくとも１つは周辺クラウンである）と、ベンチュリー効果を有する混合チャンバ（１３）と、主要空気を給入するためのダクトと、前記少なくとも１つの周辺クラウンにガスと主要空気との混合気を供給するためのラジアルダクト（９）とを備え、本体（３）と、ヘッド（２）と、主要空気を給入するためのダクト、およびガスと主要空気との混合気を分配するためのダクトに、内部空間を分割する分離要素（４）を備えるガスを燃焼するのに適した調理器具用バーナーに関する。
Patent JP-2004504168-A (JP)
IPC: B25D9/16
Filed: 2001-07-10
Abstract: The invention concerns an apparatus comprising a body ( 1 ) containing a cylinder wherein is mounted sliding an impact piston ( 1 ) of a tool, the motion of the piston being controlled by a distributor ( 15 ) which, arranged coaxial to the impact piston, is mounted inside a distribution box ( 3 ). The distribution box ( 3 ) comprises a part axially overlapping the piston ( 1 ) and arranged concentric thereto, and the distribution box ( 3 ) defines with the piston a control chamber ( 13 ) which, successively put under the high ( 9 ) and the low ( 12 ) pressure of the fluid, communicates through a passage ( 16 ) arranged in the distribution box ( 3 ) with a chamber controlling ( 14 ) the movement of the distributor ( 15 ), to generate alternately low pressure and high pressure.
Patent JP-2004505743-A (JP)
IPC: A47K10/34
Filed: 2001-08-22
Abstract: The device has upper and lower housing parts (1,4) and a detector that initiates a roller drive mechanism for cloths (T) with perforated separating lines (P) in a cassette (21). The lower housing part has at least one cassette holder and transport roller (11). The upper housing part has a drive mechanism with an electric motor (M) and gearbox. Portions are dispensed so the dividing line is in front of the rollers (11,30) but inside the dispenser. Independent claims are also included for the following: a method of operating at least one dispenser of cleaning cloths.
Patent JP-2004509462-A (JP)
Title: 外部基板上における窒化（インジウム・アルミニウム・ガリウム）のエピタキシー法
IPC: C30B23/02
Filed: 2001-08-22
Abstract: 本発明は、外部基板上における窒化（インジウム・アルミニウム・ガリウム）のエピタキシー法に関する。本発明の目的はマスクを用いない方法であって、さらに横方向成長で達成される転位の低減による利点をもたらしうる方法を提供することである。この目的のために、本発明は、基板（１）の表面にくぼみ（７）が設けられており、くぼみ（７）の底部にある（Ｉｎ，Ａｌ，Ｇａ）Ｎ層（３）の成長先端がくぼみ（７）の間に位置する突出部（６）上の成長先端から分離されるように、くぼみ（７）の壁（４）が存在していることを特徴とする方法を提供する。
Patent JP-2004514758-A (JP)
IPC: C08L101/00
Filed: 2001-11-06
Abstract: A resin binder composition for the production of a fiber preform comprising an amount of at least one polyarylether thermoplast resin component and an amount of at least one thermoset resin component in weight ratio 80/20-10/90, in substantial absence of a catalyst which is active at the prevailing preform production temperature, wherein the polyarylether thermoplast has number average molecular weight (Mn) in the range 2,000-20,000, and comprises ether linked phenyl units and ether linked arylsulphone units and reactive end groups, method for producing a fiber preform using the thermally stable binder resin composition, a perform obtained with use of the method and composition, a method for injecting or infusing the preform with curable matrix resin, the curable injected or infused preform resin, a method for curing thereof and a cured composite obtained with the method.
Patent JP-2004515532-A (JP)
Title: 消化障害及び関連する疾患を治療するための医薬組成物
IPC: A61K35/12
Filed: 2001-12-13
Abstract: 本発明は、胆汁酸成分及びバイオフラボノイド成分を含有する医薬組成物に関する。本発明による医薬組成物は、消化障害、消化障害及び消化器疾患に伴う全身性疾患の治療のため、さらに、食品添加剤と共に、食物の脂溶性ビタミン、必須脂肪酸及び食物成分の消化及び吸収を改善するために使用される。
Patent JP-2004516374-A (JP)
Title: 耐ブロッキング性を改善するための、エチレンベースのポリマーペレットの表面処理
IPC: C08J3/12
Filed: 2001-12-27
Abstract: 本発明は、少なくとも５重量％の酸含有率を有し、２５℃を超える温度にコポリマーの粘着温度を高めるための、有効量の表面コーティングを有する、エチレンベースのコポリマーペレットに関する。
Patent JP-2004521056-A (JP)
Title: 凝集した内因性点欠陥が実質的に存在しない鉄濃度の低い単結晶シリコンの製造方法および製造装置
IPC: C30B29/06
Filed: 2001-12-07
Abstract: 鉄不純物が低減された単結晶シリコンを製造する方法および装置を開示する。この装置は、グラファイト基質部を用いて構成された少なくとも１つの構造的部品と、成長チャンバの雰囲気に曝される基質部表面を覆う保護膜とを有する。グラファイト基質部は、約１．５×１０ １２ 原子数／ｃｍ ３ 以下の鉄濃度を有し、かつシリコンカーバイド保護膜は、約１．０×１０ １２ 原子数／ｃｍ ３ 以下の鉄濃度を有する。
Patent JP-2004526557-A (JP)
IPC: B05B5/047
Filed: 2002-02-05
Abstract: The invention concerns a triboelectric sprayer for spraying electrostatic powder paint, comprising a powder intake, an air intake, a conduit transporting air and powder while providing the electrical charge of the powder and, in front of the charging conduit, means for emitting at least an air-powder mixture jet. The air intake is located in the axis of the charging conduit, while the powder intake is arranged laterally and converges in an acute angle with the air intake, in a point located upstream of the charging conduit. The air intake includes of an injector made of electrically conductive material which also constitutes an earthing member of the wall of the charging conduit.
Patent JP-2004518488-A (JP)
IPC: A61K49/00
Filed: 2001-10-31
Abstract: The present invention is directed to a method of detecting a neurodegenerative disease in a mammal by activating brain tissue of the mammal by application of radiation under conditions effective to promote a simultaneous multiphoton excitation of the brain tissue and to emit a fluorescence characteristic. The fluorescence characteristic is then compared to a standard fluorescence emitted by exciting healthy brain tissue of the mammal under the same conditions used to carry out the activating step. Brain tissue where the fluorescence characteristic differs from the standard fluorescence is identified as potentially having a neurodegenerative disease. Another aspect of the present invention is directed to a method of producing an image of brain tissue from a mammal by activating brain tissue of a mammal with radiation applied under conditions effective to promote a simultaneous multiphoton excitation of the brain tissue and to produce fluorescence. The fluorescence is then collected to produce an image of the brain tissue.
Patent JP-2005505239-A (JP)
Title: ソマトスタチンレセプターに基づく融合タンパク質
IPC: C12N15/09
Filed: 2002-02-15
Abstract: 本発明は、インビトロおよびインビボの両方での遺伝子移入および遺伝子発現をアッセイするために使用され得る融合タンパク質に関する。この融合タンパク質は、第２タンパク質（これは、タンパク質融合タグであり得る）に融合されたレポータータンパク質（例えば、ソマトスタチンレセプター）を含む。あるいは、融合タンパク質は、リーダー配列に融合され得る。このリーダー配列は、発現されたタンパク質を局在化させ得、例えば、融合タンパク質を細胞膜に局在化させ得る。本発明は、融合タンパク質をコードする核酸および遺伝子発現をアッセイする方法を含む。
Patent JP-2004533041-A (JP)
IPC: G06F21/56
Filed: 2002-03-26
Abstract: A method for restoring a computer system modified by malicious code. The method scans the computer system for the malicious code, identifies the malicious code and retrieves from a data file, information relating to the malicious code including at least one command used for restoring the computer system to a state that existed prior to modification by the malicious code. The at least one command is executed to restore the computer system to substantially the state as it existed prior to modification by the malicious code.
Patent JP-2004536690-A (JP)
Title: 酵素前処理を用いる乳製品加工パイプラインの洗浄方法
IPC: C12S9/00
Filed: 2001-10-12
Abstract: 装置表面に、まず、プロテアーゼ酵素を含む第1の水性実用分散液を接触させ、次いで該表面に第2の水性酸性実用分散液を接触させる、装置表面から汚れを除去するための改善された非塩素系の洗浄系および方法の提供。酵素分散液は、好ましくはポリプロピレングリコールなどのポリオールを含み、約120℃以下の温度に加熱して使用する。酸分散液は、界面活性剤を含んでいてもよく、同じく加熱条件下で使用される。本発明の2成分系は、塩素系洗浄剤に代わる牛乳加工または他の設備のCIP処理用洗浄剤として用いることができる。
Patent JP-2004525763-A (JP)
Title: 被覆装置
IPC: B05C1/02
Filed: 2002-02-08
Abstract: 物品（１４）を被覆する装置（１０）であって、アプリケータ（１８）と、複数の物品をローラー（１８）へ連続して搬送するコンベヤー（２６）と、コンベヤーによって前記アプリケータへ搬送された物品へ転送するために、アプリケータへの所定量の被覆組成物を計量するためにアプリケータに接触して位置決めされる計量棒と、を備える装置。
Patent JP-2004524799-A (JP)
IPC: B29C48/13
Filed: 2002-04-24
Abstract: An annulated tubular sheath which is split down a longitudinal section thereof. According to the invention, a longitudinal strip of the sleeve is made of a flexible material and is disposed in an angular position of 5-180 degrees in relation to the longitudinal section or is disposed in the region of the sheath in which the longitudinal section is made. Preferably, the flexible material is a thermoplastic elastomer. The invention also relates to a method for producing a sleeve by extruding a plastic material, a longitudinal strip made of a flexible material obtained by co-extruding an elastomer material. A device for carrying out said method comprises an extrusion head provided with an insert for placing the co-extrusion in a stop position on a die in order to block the flow of the extruded plastic material and to enable the flow of elastomer material.
Patent JP-2004528386-A (JP)
Title: Ｃ３＋炭化水素の酸化的ハロゲン化および任意的な脱水素
IPC: C07C5/48
Filed: 2002-04-23
Abstract: 酸化的ハロゲン化および任意的な脱水素のプロセスであって、反応物である３個以上の炭素原子を有する炭化水素（例えばプロパンまたはプロペン）またはこれらのハロゲン化誘導体を、希土類ハロゲン化物または希土類オキシハライド触媒の存在下で、ハロゲン源および任意的に酸素源と接触させて、反応物炭化水素に比べてより多くのハロゲン置換数を有するとともに３個以上の炭素原子を有するハロゲン化炭化水素（例えば塩化アリル）および任意的にオレフィン系同時生成物（例えばプロペン）を形成するようにすることを含むプロセス。２種の生成物、すなわち、場合によってハロゲン化炭化水素またはオレフィンのうちの望ましさが低い方は、望ましい生成物の生産を最大にするために該プロセスにリサイクルすることができる。
Patent JP-2003261501-A (JP)
Title: Method for vapor-phase catalytic oxidation
Inventor: YADA SHUHEI
IPC: C07C51/225
Filed: 2003-01-06
Abstract: <P>PROBLEM TO BE SOLVED: To provide a method for vapor-phase catalytic oxidation, with which a hot spot in a catalytic layer is controlled, propylene or isobutylene is oxidized with molecular oxygen, a catalyst life is improved and (meth)acrolein or (meth) acrylic acid is efficiently produced by a fixed bed multitubular reactor, a catalyst is packed into the inside of each reaction tube of the fixed bed multitubular reactor and the oxidation is carried out while supplying reaction raw material gas to the reactor.  <P>SOLUTION: Two or more catalytic layers having different activities are laid in a laminar state in the reaction direction in each reaction tube of the fixed bed multitubular reactor, a catalytic layer nearest to a reaction raw material gas inlet is provided with a catalytic layer having activity higher than that of an adjacent next catalytic layer.  <P>COPYRIGHT: (C)2003,JPO