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    Co-production of an aromatic monoamine and an aromatic diamine directly from benzene or a benzene derivative through controlled nitration and reduction
    1.
    发明授权
    Co-production of an aromatic monoamine and an aromatic diamine directly from benzene or a benzene derivative through controlled nitration and reduction 失效
    通过控制硝化和还原从苯苯或苄苯衍生物直接合成芳族单胺和芳族二胺

    公开(公告)号：US5081303A

    公开(公告)日：1992-01-14

    申请号：US341743

    申请日：1989-04-21

    申请人： Harold Greenfield ,  Arthur C. Bayer ,  Earl G. Alley

    发明人： Harold Greenfield ,  Arthur C. Bayer ,  Earl G. Alley

    IPC分类号： B01J23/44 ,  C07B61/00 ,  C07C205/06 ,  C07C209/36 ,  C07C211/46 ,  C07C211/51

    CPC分类号： C07C201/08 ,  C07C209/36

    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 liquid 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, is characterized in that the hydrogenation is carried out in the liquid phase with the unpurified reaction products from the first stage.Preferably, the second stage reaction is carried out utilizing a palladium-on-carbon catalyst in an amount of from 0.006 to 0.25 wt. % based on the total weight of the first stage reaction product mixture. 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，第一阶段的产物在液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％），邻苯二胺和对苯二胺在较小的 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。 提供苯胺和间苯二胺的第二阶段的特征在于氢化是在第一阶段与未纯化的反应产物在液相中进行的。 优选地，第二阶段反应使用钯 - 碳催化剂进行，其量为0.006-0.25wt。 ％，基于第一阶段反应产物混合物的总重量。 该方法适用于其它芳族单胺和二胺的共生产。

    Process for the production of 2,2,6,6-tetraalkyl-4-piperidylamines
    2.
    发明授权
    Process for the production of 2,2,6,6-tetraalkyl-4-piperidylamines 失效
    用于制备2,2,6,6-四烷基-4-哌啶基胺的方法

    公开(公告)号：US4607104A

    公开(公告)日：1986-08-19

    申请号：US754378

    申请日：1985-07-11

    申请人： Russell E. Malz, Jr. ,  Harold Greenfield

    发明人： Russell E. Malz, Jr. ,  Harold Greenfield

    IPC分类号： C07D211/46 ,  B01J23/00 ,  C07B61/00 ,  C07D211/58 ,  C07D211/74 ,  C07D401/12 ,  C07D401/14

    CPC分类号： C07D211/58

    摘要： 2,2,6,6-tetraalkyl-4-piperidylamines are produced by reacting an amine with a 2,2,6,6-tetraalkyl-4-piperidone in the presence of a catalyst selected from the group consisting of platinum, nickel and cobalt, employing a reaction medium comprising (a) between about 10 and 100 weight percent water and (b) between 0 and about 90 weight percent of a polar organic compound selected from the group consisting of C.sub.1 -C.sub.10 aliphatic alcohols and C.sub.2 -C.sub.6 aliphatic glycols.

    摘要翻译： 2,2,6,6-四烷基-4-哌啶胺是通过使胺与2,2,6,6-四烷基-4-哌啶酮在选自铂，镍和 钴，使用包含（a）约10至100重量％的水和（b）0至约90重量％的极性有机化合物的反应介质，所述极性有机化合物选自C1-C10脂族醇和C2-C6脂族醇 二醇。

    Nuclear hydrogenation of n-aryl carbamates
    4.
    发明授权
    Nuclear hydrogenation of n-aryl carbamates 失效
    正 - 芳基氨基甲酸酯的核氢化

    公开(公告)号：US4069240A

    公开(公告)日：1978-01-17

    申请号：US610359

    申请日：1975-09-04

    申请人： Russell E. Malz, Jr. ,  Harold Greenfield

    发明人： Russell E. Malz, Jr. ,  Harold Greenfield

    IPC分类号： C07B35/02 ,  B01J23/00 ,  B01J23/40 ,  B01J23/46 ,  C07B31/00 ,  C07B61/00 ,  C07C20060101 ,  C07C67/00 ,  C07C239/00 ,  C07C269/00 ,  C07C125/06

    CPC分类号： C07D207/16

    摘要： N-Alicyclic carbamates, useful in making polyurethanes, are prepared by nuclear hydrogenation of an N-aryl carbamate using a group VIII transition metal catalyst. E.g., dimethyl 4,4'-methylenedicarbanilate is contacted with hydrogen and ruthenium catalyst in 2-propanol medium, at 50.degree. C. for 1.3 hours under a pressure of 500-800 psi, to form dimethyl 4,4'-methylenedicyclohexylcarbamate. Acid activation of catalyst is a feature of the invention.

    摘要翻译： 可用于制备聚氨酯的N-脂环族氨基甲酸酯通过使用第VIII族过渡金属催化剂的N-芳基氨基甲酸酯的核氢化制备。 例如，4,4'-亚甲基二苯甲酸二甲酯与氢和钌催化剂在2-丙醇介质中在50℃下在500-800psi的压力下在50℃下接触1.3小时，形成二甲基4,4'-亚甲基二环己基氨基甲酸酯。 催化剂的酸活化是本发明的特征。