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32 条记录 (耗时 0.026 秒)

    Addition of mineral acids or salts thereof to a TMA production process
    6.
    发明授权
    Addition of mineral acids or salts thereof to a TMA production process 有权
    将无机酸或其盐加入到TMA生产过程中

    公开(公告)号：US06696604B2

    公开(公告)日：2004-02-24

    申请号：US10036551

    申请日：2002-01-03

    申请人： Steven A. Cerefice ,  Wayne P. Schammel ,  David A. Young

    发明人： Steven A. Cerefice ,  Wayne P. Schammel ,  David A. Young

    IPC分类号： C07C6500

    CPC分类号： C07D307/90 ,  C07C51/44 ,  C07C63/307

    摘要： This invention is related to the production of trimellitic anhydride (TMA). More specifically, the invention is related to the addition of a mineral acid or salt thereof in the production process of trimellitic anhydride to reduce the viscosity of the bottoms fraction when TMA is purified by distillation and thus to prevent fouling/plugging. This permits the use of lower levels of TMA in the bottoms fraction and increases TMA recovery.

    摘要翻译： 本发明涉及偏苯三酸酐（TMA）的生产。 更具体地，本发明涉及在偏苯三酸酐的制备方法中添加无机酸或其盐以降低塔氏馏分在通过蒸馏纯化时的粘度，从而防止结垢/堵塞。 这允许在底部馏分中使用较低水平的TMA并增加TMA回收率。

    Process for the production of trimellitic acid
    7.
    发明授权
    Process for the production of trimellitic acid 失效
    偏苯三酸生产工艺

    公开(公告)号：US4764639A

    公开(公告)日：1988-08-16

    申请号：US801564

    申请日：1985-11-25

    申请人： Wayne P. Schammel

    发明人： Wayne P. Schammel

    IPC分类号： C07C51/265

    CPC分类号： C07C51/265

    摘要： A process for the manufacture of trimellitic acid for pseudocumene feedstock wherein the amount of cobalt used as catalyst is reduced to the range of about 0.06 to about 0.25 weight percent based on pseudocumene feedstock.

    摘要翻译： 用于制备假枯烯原料的偏苯三酸的方法，其中用作催化剂的钴的量基于假花生原料减少至约0.06至约0.25重量％的范围。

    Process for the production of trimellitic anhydride
    8.
    发明授权
    Process for the production of trimellitic anhydride 失效
    偏苯三酸酐的制备方法

    公开(公告)号：US4537978A

    公开(公告)日：1985-08-27

    申请号：US591468

    申请日：1984-03-20

    申请人： Peter H. Kilner ,  Joseph P. Egan, Jr. ,  Stephen G. Ceisel ,  Wayne P. Schammel

    发明人： Peter H. Kilner ,  Joseph P. Egan, Jr. ,  Stephen G. Ceisel ,  Wayne P. Schammel

    IPC分类号： C07C51/265 ,  C07D307/89

    CPC分类号： C07C51/265

    摘要： A process for the oxidation of pseudocumene to trimellitic acid anhydride which comprises catalytic oxidation of pseudocumene with air in the presence of acetic acid in an oxidation zone in the liquid phase and wherein the weight ratio of acetic acid to pseudocumene is in the range of about 1.0-2.5:1.0 and the catalyst comprises one or more heavy metal oxidation catalysts comprising zirconium, cobalt and manganese to provide about 0.2 to about 0.4 weight percent total metals based on pseudocumene and a source of bromine. The addition of the bromine component is controlled to provide a total of about 0.10 to about 0.30 weight percent total bromine based on pseudocumene. The total weight ratio of bromide ions to total metals ions is about 0.7 to about 2.0. The zirconium content is about 1 to about 5% and manganese content is about 14 to about 24% each by weight of the total metals. The reaction temperature is about 100.degree. C. to about 250.degree. C. The acetic acid and water of reaction are withdrawn during the last 5 to about 20% of the reaction.

    摘要翻译： 一种用于将假阳离子氧化为偏苯三酸酐的方法，其包括在液相中的氧化区中在乙酸存在下用空气催化氧化假枯烯，并且其中乙酸与假枯烯的重量比在约1.0的范围内 -2.5:1.0，并且催化剂包含一种或多种包含锆，钴和锰的重金属氧化催化剂，以提供约0.2至约0.4重量％的基于假阳离子和溴源的总金属。 控制加入溴组分以提供基于假枯烯的总共约0.10至约0.30重量％的总溴。 溴离子与总金属离子的总重量比为约0.7至约2.0。 锆含量为约1至约5％，锰含量为总金属重量的约14至约24％。 反应温度为约100℃至约250℃。在反应的最后5至约20％期间，将乙酸和反应水取出。

    Process for the production of trimellitic acid
    10.
    发明授权
    Process for the production of trimellitic acid 失效
    偏苯三酸生产工艺

    公开(公告)号：US4992579A

    公开(公告)日：1991-02-12

    申请号：US451606

    申请日：1989-12-18

    申请人： Wayne P. Schammel

    发明人： Wayne P. Schammel

    IPC分类号： B01J27/08 ,  B01J31/04 ,  C07B61/00 ,  C07C51/265 ,  C07C63/307 ,  C07D307/89

    CPC分类号： C07C51/265

    摘要： A process for the manufacture of trimelitic acid from pseudocumene is disclosed. The pseudocumene is oxidized in the presence of a cerium, cobalt, manganese, and optionally zirconium, bromine catalyst wherein all of the cerium is added in the second stage of the oxidation, and wherein most of the bromine is also added during the second oxidation stage. Trimellitic acid is useful in the manufacture of polyester and polyamide-imides.

    摘要翻译： 公开了一种从假枯烯制备偏苯三酸的方法。 在存在铈，钴，锰和任选的锆，溴催化剂的情况下将假阳离子氧化，其中所有的铈在氧化的第二阶段被加入，并且其中大部分溴也在第二氧化阶段加入 。 偏苯三酸可用于制造聚酯和聚酰胺 - 酰亚胺。