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1. 发明授权

US5504218A Method for production pyromellitic anhydride 失效
标题翻译：苯均四酸酐生产方法
公开(公告)号：US5504218A
公开(公告)日：1996-04-02
申请号：US416229
申请日：1995-04-04
申请人： Tsukasa Takahashi , Tatsuya Kawabata , Masaaki Okuno , Yasuhisa Emoto , Toshio Sagane , Kenji Ueda
发明人： Tsukasa Takahashi , Tatsuya Kawabata , Masaaki Okuno , Yasuhisa Emoto , Toshio Sagane , Kenji Ueda
IPC分类号： B01J23/22 , B01J23/24 , C07C51/265 , C07D493/04 , C07D307/89
CPC分类号： C07D493/04 , B01J23/22 , B01J23/24 , C07C51/265
摘要： A method for producing efficiently on a commercial scale pyromellitic anhydride having high purity and suffering only sparing coloration in a high yield from a raw material of high concentration is provided. By the use of a multilayer catalyst formed by packing on the reaction gas outlet side a first catalyst containing V and Mo and/or W and having an atomic ratio of Mo and/or W to V in the range of from 0.01 to 2, on the raw material mixed gas inlet side a second catalyst containing V, Mo and/or W and having an atomic ratio of Mo and/or W to V smaller than the atomic ratio of the first catalyst, and/or a third catalyst containing V and an alkali metal and having an atomic ratio of the alkali metal to V in the range of from 0.2 to 2.5, pyromellitic anhydride is produced by the vapor-phase oxidation of a tetraalkyl benzene with a molecular oxygen-containing gas.
摘要翻译：提供了一种在商业规模高效率地生产具有高纯度的均苯四酸酐的方法，并且从高浓度的原料高收率地进行着色。通过使用通过在反应气体出口侧填充形成的多层催化剂，含有V和Mo和/或W的原子比为Mo和/或W至V的范围为0.01至2的第一催化剂，原料混合气体入口侧含有V，Mo和/或W的第二催化剂，其原子比为Mo和/或W至V的原子比小于第一催化剂的原子比，和/或含有V和碱金属与碱金属与V的原子比在0.2〜2.5的范围内，通过四烷基苯与分子氧气体的气相氧化制备均苯四酸酐。

2. 发明授权

US6153767A Production process for pyromellitic dianhydride 失效
标题翻译：均苯四甲酸二酐的制备方法
公开(公告)号：US6153767A
公开(公告)日：2000-11-28
申请号：US270742
申请日：1999-03-16
申请人： Toshio Sagane , Tsukasa Takahashi , Yasuhisa Emoto
发明人： Toshio Sagane , Tsukasa Takahashi , Yasuhisa Emoto
IPC分类号： B01J8/06 , B01J23/22 , B01J27/18 , B01J27/198 , B01J35/00 , C07C51/265 , C07D493/04
CPC分类号： C07C51/265 , B01J23/002 , B01J23/22 , B01J27/1817 , B01J27/198 , B01J35/0006 , B01J8/06 , B01J2523/00
摘要： Provided is a process for producing pyromellitic dianhydride by feeding 1,2,4,5-tetraalkylbenzene to a fixed bed multitubular type reactor charged with a catalyst layer to carry out catalytic vapor phase oxidation. This process is characterized by dividing the catalyst layer into at least two layers to charge a layer at an outlet side of reaction gas and a layer at an inlet side of raw material mixed gas with the following catalyst A and catalyst B respectively or dividing the catalyst layer into at least three layers to charge a layer at an outlet side of reaction gas, an intermediate layer and a layer at an inlet side of raw material mixed gas with the following catalyst A, catalyst B and catalyst C respectively:catalyst A: a catalyst containing V.sub.a (A).sub.b P.sub.c Ag.sub.d (B).sub.e O.sub.x, wherein (A) represents at least one element selected from Mo and W; (B) represents at least one element selected from alkaline metals and alkaline earth metals; a to e each represent an atomic number thereof,catalyst B: a catalyst containing V.sub.a Ti.sub.b (C).sub.c (D).sub.d Ce.sub.e O.sub.x wherein (C) represents at least one element selected from rare earth elements (excluding cerium); (D) represents at least one element selected from P, Sb, Hf, Nb, T, B and S; a to e and x each represent an atomic number thereof, andcatalyst C: a catalyst containing V.sub.a (E).sub.b (F).sub.c (G).sub.d O.sub.x, wherein (E) represents at least one element selected from alkaline metals; (F) represents at least one element selected from P and Cu; (G) represents at least one element selected from silver, sulfur, tantalum, boron, tungusten, and molybdenum; a to d and x each represent an atomic number thereof.
摘要翻译：本发明提供了一种通过将1,2,4,5-四烷基苯供给到装有催化剂层的固定床多管式反应器中进行催化气相氧化来制备均苯四酸二酐的方法。该方法的特征在于将催化剂层分成至少两层，以分别将催化剂A和催化剂B分别装入反应气体的出口侧的层和原料混合气入口侧的层，或分离催化剂层至少三层，以分别在反应气体的出口侧，原料混合气体的中间层和入口侧的层与以下催化剂A，催化剂B和催化剂C分别充电：催化剂A：a 含有Va（A）bPcAgd（B）eOx的催化剂，其中（A）表示选自Mo和W中的至少一种元素; （B）表示选自碱金属和碱土金属中的至少一种元素; a至e各自表示其原子序数，催化剂B：含有VaTib（C）c（D）dCeeO x的催化剂，其中（C）表示选自稀土元素（不包括铈）中的至少一种元素; （D）表示选自P，Sb，Hf，Nb，T，B和S中的至少一种元素; a至e和x各自表示其原子序数，催化剂C：含有Va（E）b（F）c（G）dOx的催化剂，其中（E）表示选自碱金属的至少一种元素; （F）表示选自P和Cu中的至少一种元素; （G）表示选自银，硫，钽，硼，钨和钼中的至少一种元素; a至d和x各自表示其原子序数。

3. 发明授权

US06452021B1 Process for producing pyromellitic anhydride 失效
标题翻译：制备均苯四酸酐的方法
公开(公告)号：US06452021B1
公开(公告)日：2002-09-17
申请号：US09963402
申请日：2001-09-27
申请人： Tsukasa Takahashi , Yasuhisa Emoto , Etsushige Matsunami
发明人： Tsukasa Takahashi , Yasuhisa Emoto , Etsushige Matsunami
IPC分类号： C07D30777
CPC分类号： C07C51/235 , C07C63/307
摘要： The present invention has for its object to provide a production method of pyromellitic anhydride of high purity in good yield at low cost by catalytic gas-phase oxidation of a 2,4,5-trialkylbenzaldehyde with the aid of a suitable catalyst system. The present invention relates to a production method of pyromellitic anhydride comprising a step for catalytic gas-phase oxidation of a 2,4,5-trialkylbenzaldehyde with a molecular oxygen-containing gas in which said step for catalytic gas-phase oxidation is carried out in the presence of a catalyst such that a specific surface area of the catalytic active component thereof is not greater than 50 m2/g or in the presence of a catalyst containing vanadium as well as molybdenum and/or tungsten as a catalytic active component.
摘要翻译：本发明的目的是通过合适的催化剂体系，通过2,4,5-三烷基苯甲醛的催化气相氧化，以低成本提供高纯度的均苯四酸酐的制备方法。本发明涉及1,2,4,5-苯四酸酐的制备方法，其包括用含有分子氧的气体催化气相氧化2,4,5-三烷基苯甲醛的步骤，其中所述催化气相氧化步骤在存在下进行的催化剂，使得其催化活性组分的比表面积不大于50m 2 / g，或者在含有钒的催化剂以及钼和/或钨作为催化活性组分的存在下。

4. 发明授权

US5902907A Method for production of fluorenone 失效
标题翻译：芴酮生产方法
公开(公告)号：US5902907A
公开(公告)日：1999-05-11
申请号：US968227
申请日：1997-11-12
申请人： Tsukasa Takahashi , Yasuhisa Emoto
发明人： Tsukasa Takahashi , Yasuhisa Emoto
IPC分类号： B01J23/22 , C07C49/675 , C07C45/02
CPC分类号： B01J23/22 , C07C49/675
摘要： A method for the production of fluorenone for the vapor-phase catalytic oxidation of fluorene with a molecular oxygen-containing gas, which including adjusting the molar ratio of fluorene to molecular oxygen in a feed raw material gas composed of fluorene as a raw material and a molecular oxygen-containing gas in the range of 1:1 to 0.13:1, or keeping the sulfur content in a raw material fluorene at or below 0.15% by weight.
摘要翻译：一种用含有分子氧的气体进行芴酮气相催化氧化芴酮的方法，其包括调整以芴为原料的原料气体中的芴与分子氧的摩尔比，分子含氧气体的范围为1：1至0.13：1，或将原料芴中的硫含量保持在0.15％（重量）以下。

5. 发明授权

US5663114A Catalyst for production of pyromellitic anhydride and method for production of pyromellitic anhydride 失效
标题翻译：苯均四酸酐的制备用催化剂及苯均四酸酐的制造方法
公开(公告)号：US5663114A
公开(公告)日：1997-09-02
申请号：US327234
申请日：1994-10-21
申请人： Tsukasa Takahashi , Tatsuya Kawabata , Masaaki Okuno , Yasuhisa Emoto , Yasushi Kiyooka , Kenji Ueda
发明人： Tsukasa Takahashi , Tatsuya Kawabata , Masaaki Okuno , Yasuhisa Emoto , Yasushi Kiyooka , Kenji Ueda
IPC分类号： B01J23/68 , B01J27/199 , C07C51/265 , B01J23/50 , B01J23/22
CPC分类号： B01J23/002 , B01J23/682 , B01J23/683 , B01J27/199 , C07C51/265 , B01J2523/00
摘要： A catalyst for obtaining pyromellitic anhydride at a high raw material gas concentration with high yield and a method for the production of pyromellitic anhydride are provided. The catalyst containing vanadium and silver as essential component elements for catalyst and having an atomic ratio of silver to vanadium in the range of from 0.001 to 0.2 allows efficient production of pyromellitic anhydride by the vapor-phase oxidation of a tetraalkylbenzene with a molecular oxygen-containing gas. The method of this invention accomplishes the production of pyromellitic anhydride by the use of the catalyst.
摘要翻译：提供了以高产率获得高原料气体浓度的均苯四酸酐的催化剂和制备1,2,4,5-苯四酸酐的方法。含有钒和银的催化剂作为催化剂的主要组分元素并且银与钒的原子比在0.001至0.2范围内的催化剂允许通过四烷基苯与含分子氧的气相氧化有效生产均苯四酸酐加油站。本发明的方法通过使用催化剂来实现均苯四酸酐的制备。

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