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    Binary phase transfer/amine catalyst for making aromatic polycarbonates
    4.
    发明授权
    Binary phase transfer/amine catalyst for making aromatic polycarbonates 失效
    用于制备芳族聚碳酸酯的二元相转移/胺催化剂

    公开(公告)号：US5739257A

    公开(公告)日：1998-04-14

    申请号：US734769

    申请日：1996-10-21

    申请人： Eugene P. Boden ,  Larry I. Flowers ,  Peter D. Phelps ,  David L. Ramsey ,  Paul D. Sybert

    发明人： Eugene P. Boden ,  Larry I. Flowers ,  Peter D. Phelps ,  David L. Ramsey ,  Paul D. Sybert

    IPC分类号： C08G64/24 ,  C08G64/00

    CPC分类号： C08G64/24

    摘要： A composition and method is provided for making polycarbonate utilizing an effective amount of a binary catalyst system, comprising a phase transfer catalyst selected from the group consisting of methyltributylammonium halide and hexabutylbutylenediammonium halide and a tertiary organic amine, as a condensation catalyst during the interfacial phosgenation of a bisphenol, such as bisphenol A. Improved phosgene utilization and the substantial elimination of emulsion formation in the interfacial polymerization reactor and the processing units downstream thereof results.

    摘要翻译： 提供了一种组合物和方法，用于使用有效量的二元催化剂体系制备聚碳酸酯，其包括在界面光气化期间作为缩合催化剂的选自甲基三丁基卤化铵和六丁基丁烯二胺的卤化物和叔有机胺的相转移催化剂 双酚A.双酚A.改善的光气利用率和在界面聚合反应器及其下游处理单元中乳液形成的显着消除。

    Co-production of an aromatic monoamine and an aromatic diamine directly from benzene or a benzene derivative through controlled nitration
    6.
    发明授权
    Co-production of an aromatic monoamine and an aromatic diamine directly from benzene or a benzene derivative through controlled nitration 失效
    通过控制硝化直接从苯或苯衍生物共同生产芳族单胺和芳族二胺

    公开(公告)号：US4740621A

    公开(公告)日：1988-04-26

    申请号：US793788

    申请日：1985-11-01

    申请人： Earl G. Adams ,  Robert B. Barker ,  Mark J. Lossett ,  Larry I. Flowers

    发明人： Earl G. Adams ,  Robert B. Barker ,  Mark J. Lossett ,  Larry I. Flowers

    IPC分类号： C07C67/00 ,  C07C205/06 ,  C07C209/00 ,  C07C209/36 ,  C07C211/46 ,  C07C211/51 ,  C07C85/11

    CPC分类号： C07C209/36 ,  C07C201/08

    摘要： A two-stage process for the co-production of aniline and m-phenylenediamine where, in the first stage, benzene, nitric acid, and sulfuric acid are reacted in a liquid phase to produce in greater amounts nitrobenzene (approximately 70%) and m-dinitrobenzene (approximately 30%), and in lesser or trace amounts o-dinitrobenzene and p-dinitrobenzene, and water; and in the second stage the products of the first stage are reacted with hydrogen in the gas phase to produce aniline (approximately 70%) and m-phenylenediamine (approximately 30%) in greater amounts, and o-phenylenediamine and p-phenylenediamine in lesser amounts, and water. The reaction products are separated by distillation. The first stage of a preferred embodiment of the process is characterized in that a concentrated mixture of nitric acid and sulfuric acid are fed along with mononitrobenzene to a first reactor for producing dinitrobenzene, and then the dilute acid mixture recovered from this first reactor is fed along with benzene to a second reactor for producing the mononitrobenzene used as a reactant in the first reactor. The second stage, which provides the aniline and m-phenylenediamine in major amounts, is characterized in that the hydrogenation is carried out in the gas phase with product aniline serving as a diluent. The process is applicable to the co-production of other aromatic mono- and diamines.

    摘要翻译： 用于苯胺和间苯二胺共同生产的两阶段方法，其中在第一阶段中，苯，硝酸和硫酸在液相中反应以产生更大量的硝基苯（约70％）和m - 二硝基苯（约30％）和较少或微量的邻二硝基苯和对二硝基苯和水; 并且在第二阶段中，第一阶段的产物在气相中与氢气反应，以产生更大量的苯胺（约70％）和间苯二胺（约30％），较小的邻苯二胺和对苯二胺 数量和水。 反应产物通过蒸馏分离。 该方法的优选实施方案的第一阶段的特征在于将硝酸和硫酸的浓缩混合物与一硝基苯一起加入到用于生产二硝基苯的第一反应器中，然后将从该第一反应器回收的稀酸混合物进料 用苯制备第二反应器，用于生产在第一反应器中用作反应物的单硝基苯。 提供主要量的苯胺和间苯二胺的第二阶段的特征在于氢化在产物苯胺作为稀释剂的气相中进行。 该方法适用于其它芳族单胺和二胺的共生产。