Process for producing 1,3-dialkyl-2-imidazolidinone
    61.
    发明授权
    Process for producing 1,3-dialkyl-2-imidazolidinone 失效
    1,3-二烷基-2-咪唑啉酮的制备方法

    公开(公告)号:US5583256A

    公开(公告)日:1996-12-10

    申请号:US494735

    申请日:1995-06-26

    IPC分类号: C07C275/14 C07D233/34

    CPC分类号: C07D233/34 C07C275/14

    摘要: A novel bis-urea compound, preparation process of the compound, and preparation process of 1,3-dialkyl-2-imidazolidinone are disclosed and the disclosure provides a novel preparation process of 1,3-dialkyl-2-imidazolidinone and simultaneously enables effective utilization of N,N',N"-trialkyldiethylentriamine which lacks a large amount use and is desired to develop new application.

    摘要翻译: 公开了一种新的双脲化合物,该化合物的制备方法和1,3-二烷基-2-咪唑烷酮的制备方法,本公开提供了1,3-二烷基-2-咪唑烷酮的新型制备方法,同时使得有效 利用缺乏大量使用的N,N',N“ - 三烷基二乙基三胺,需要开发新的应用。

    Process for the preparation of diphenylamine or nucleus-substituted
derivative thereof
    62.
    发明授权
    Process for the preparation of diphenylamine or nucleus-substituted derivative thereof 失效
    二苯胺或其取代衍生物的制备方法

    公开(公告)号:US5545752A

    公开(公告)日:1996-08-13

    申请号:US458294

    申请日:1995-06-02

    IPC分类号: C07C209/18 C07C209/28

    CPC分类号: C07C209/18 C07C209/28

    摘要: A processes for the preparation of diphenylamine or a nucleus-substituted derivative thereof, which comprise, upon feeding into a reaction system a phenol compound and reacting in the reaction system a cyclohexanone compound with an aniline compound in the presence of a hydrogen transfer catalyst and a catalytic amount of the cyclohexanone compound corresponding to the phenol compound while using the phenol compound as a hydrogen acceptor and forming the cyclohexanone compound in the reaction system, (1) conducting reaction while adding dropwise the aniline compound and (2) employing a hydroxide, carbonate or bicarbonate of an alkali metal and/or alkaline earth metal when the hydrogen transfer catalyst is one of noble metals of Group VIII of the periodic table, respectively.

    摘要翻译: 一种二苯胺或其取代衍生物的制备方法,其包括在反应体系中加入酚化合物,并在氢转移催化剂存在下使反应体系中的环己酮化合物与苯胺化合物反应, 催化量的对应于酚化合物的环己酮化合物,同时使用酚化合物作为氢受体并在反应体系中形成环己酮化合物,(1)在滴加苯胺化合物的同时进行反应,和(2)使用氢氧化物,碳酸酯 或氢过渡催化剂分别为周期表第Ⅷ族贵金属之一时,碱金属和/或碱土金属的碳酸氢盐。

    Process for the preparation of diphenylamine
    63.
    发明授权
    Process for the preparation of diphenylamine 失效
    二苯胺制备方法

    公开(公告)号:US5449829A

    公开(公告)日:1995-09-12

    申请号:US260903

    申请日:1994-06-15

    CPC分类号: C07C209/28 C07C209/26

    摘要: A diphenylamine with both the phenyl groups being substituted is prepared by reacting a phenol with ammonia in the presence of a hydrogen transfer catalyst and a cyclohexanone; or by converting a portion of the phenol to the cyclohexanone in the presence of a hydrogen transfer catalyst and under hydrogen pressure and then reacting the remaining portion of the phenol with ammonia in the presence of the cyclohexanone so converted and the hydrogen transfer catalyst. The diphenylamine can be obtained very efficiently.

    摘要翻译: 具有两个苯基取代的二苯胺通过在氢转移催化剂和环己酮的存在下使苯酚与氨反应来制备; 或者通过在氢转移催化剂的存在下和在氢气压力下将一部分酚转化为环己酮,然后在所转化的环己酮和氢转移催化剂的存在下使酚的剩余部分与氨反应。 可以非常有效地获得二苯胺。

    Process for preparing high-purity aniline
    64.
    发明授权
    Process for preparing high-purity aniline 失效
    制备高纯度苯胺的方法

    公开(公告)号:US5283365A

    公开(公告)日:1994-02-01

    申请号:US896696

    申请日:1992-06-10

    IPC分类号: C07C209/36

    CPC分类号: C07C209/36

    摘要: A process for the continuous preparation of aniline by hydrogenating nitrobenzene is disclosed which comprises the steps of suspending, in an aniline solvent, a catalyst of palladium or palladium-platinum which is deposited on a lipophilic carbon having an oil absorbency of at least 100, adding a zinc compound and an alkali metal carbonate or a zinc compound and an alkali metal bicarbonate as promotors to the reaction system, and carrying out reaction at a temperature of from 150 to 250.degree. C. substantially in the absence of water while aniline and water formed in said reaction are continuously distilled off as vapor from the reaction product, and the concentration of nitrobenzene in the reaction solution is maintained at 0.01% by weight or less.

    摘要翻译: 公开了通过氢化硝基苯连续制备苯胺的方法,其包括以下步骤:在苯胺溶剂中悬浮沉积在吸油性至少为100的亲脂性碳上的钯或钯 - 铂催化剂,加入 锌化合物和碱金属碳酸盐或锌化合物和碱金属碳酸氢盐作为反应体系的促进剂,并且在150-250℃的温度下进行反应,基本上在不存在水的同时形成苯胺和水 在所述反应中作为蒸气从反应产物中连续蒸馏出来,反应溶液中硝基苯的浓度保持在0.01重量%以下。

    Process for producing aminobenzylamine
    65.
    发明授权
    Process for producing aminobenzylamine 失效
    生产氨基苄胺的方法

    公开(公告)号:US4978792A

    公开(公告)日:1990-12-18

    申请号:US323087

    申请日:1989-03-14

    IPC分类号: C07C209/36

    CPC分类号: C08G59/504 C07C209/36

    摘要: A commercially advantageous process for producing m- or p-aminobenzylamine is provided, which is characterized by subjecting m- or p-nitrobenzaldehyde and ammonia to catalytic reduction in the presence of a reducing catalyst in an organic solvent; in the reduction, when nitrobenzaldehyde and ammonia are in advance made a mixed solution in an organic solvent, and this solution is added in divided manner, the yield being further improved.

    摘要翻译: 提供了一种商业上有利的生产对 - 或对氨基苄胺的方法,其特征在于在还原催化剂存在下在有机溶剂中使对 - 硝基苯甲醛和氨进行催化还原; 在还原时,预先将硝基苯甲醛和氨在有机溶剂中制成混合溶液,分开加入该溶液,进一步提高收率。

    Process for producing diphenylamines or N,N'-diphenyl-phenylenediamines
    66.
    发明授权
    Process for producing diphenylamines or N,N'-diphenyl-phenylenediamines 失效
    制备二苯胺或N,N'-二苯基 - 苯二胺的方法

    公开(公告)号:US4952731A

    公开(公告)日:1990-08-28

    申请号:US232011

    申请日:1988-08-15

    IPC分类号: C07C209/18 C07C85/06

    CPC分类号: C07C209/18

    摘要: Diphenylamines or N,N'-diphenyl-phenylenediamines can be obtained by heat-reacting an aniline or a phenylenediamine with preferably an excess of a phenol in an amount of 4 to 20 moles per mole of the aniline or phenylenediamine in th presence of a hydrogen transfer catalyst and a cyclohexanone corresponding to said phenol.The excess phenol used in the reaction undergoes reduction in the reaction system to form a cyclohexanone, which in turn reacts with the aniline or phenylenediamine to form a Schiff base and is thus consumed. The Schiff base forms the intended product by means of a dehydrogenation reaction, and the hydrogen evolved at this time reduces the phenol to form a cyclohexanone.The phenol present in excess thus becomes in the system a solvent, a starting material for the cyclohexanone, and an acceptor of the hydrogen that forms as a by-product at the time of formation of the intended product. Hence, it becomes possible to obtain the intended product at a high selectivity from the anilines and phenylenediamines.The process of this invention is an advantageous process for the industrial production of especially the nuclearly substituted diphenylamines.

    Process for producing cyclic ureas
    67.
    发明授权
    Process for producing cyclic ureas 失效
    生产环脲的方法

    公开(公告)号:US4918186A

    公开(公告)日:1990-04-17

    申请号:US320228

    申请日:1989-03-07

    摘要: A process for producing a cyclic urea is provided. The process comprises reacting a diamine expressed by the formula (II)R-HN-R'-NH-R (II)wherein R represents hydrogen atom or a lower alkyl group and R' represent dimethylene group, a lower alkyl group-substituted dimethylene group, trimethylene group, a lower alkyl group-substituted trimethylene group, tetramethylene group, a lower alkyl group-substituted tetramethylene group, but a case where R represents hydrogen atom and R' represent dimethylene group, a case where R represents hydrogen atom and R' represents a lower alkyl group-substituted dimethylene group and a case where R represent methyl group and R' represents dimethylene group are excluded, with phosgene in the presence of a dehydrochlorinating agent. In the process, the diamine is first converted to its hydrochloride, followed by reacting the hydrochloride with phosgene in water solvent while maintaining a pH of the reaction liquid in the range of 5.0 to 8.0 by said dehydrochlorinating agent to obtain a cyclic urea expressed by the formula (I) ##STR1## wherein R and R' are each as defined above.

    摘要翻译: 提供了一种制备环状尿素的方法。 该方法包括使由式(II)R-HN-R'-NH-R(II)表示的二胺反应,其中R表示氢原子或低级烷基,R'表示二亚甲基,低级烷基取代的二亚甲基 基团,三亚甲基,低级烷基取代的三亚甲基,四亚甲基,低级烷基取代的四亚甲基,但是R表示氢原子,R'表示二亚甲基的情况,R表示氢原子,R '表示低级烷基取代的二亚甲基,并且在脱氯化氢剂的存在下,光气被排除在外,R表示甲基,R'表示二亚甲基的情况。 在此过程中,首先将二胺转化为盐酸盐,然后将盐酸盐与光气在水溶剂中反应,同时用上述脱氯化氢将反应液的pH值保持在5.0〜8.0的范围内,得到由 式(I)其中R和R'各自如上所定义。

    Process for producing diphenylamines or N,N'-diphenylphenylenediamines
    68.
    发明授权
    Process for producing diphenylamines or N,N'-diphenylphenylenediamines 失效
    制备二苯胺或N,N'-二苯基苯胺的方法

    公开(公告)号:US4871875A

    公开(公告)日:1989-10-03

    申请号:US246014

    申请日:1988-09-14

    IPC分类号: C07C209/18

    CPC分类号: C07C209/18

    摘要: Diphenylamines or N,N'-diphenyl-phenylenediamines can be obtained by heat-reacting an aniline or a phenylenediamine with preferably an excess of a phenol in an amount of 4 to 20 moles per mole of the aniline or phenylenediamine in the presence of a hydrogen transfer catalyst and a cyclohexanone corresponding to said phenol.The excess phenol used in the reaction undergoes reduction in the reaction system to form a cyclohexanone, which in turn reacts with the aniline or phenylenediamine to form a Schiff base and is thus consumed. The Schiff base forms the intended product by means of a dehydrogenation reaction, and the hydrogen evolved at this time reduces the phenol to form a cyclohexanone.The phenol present in excess thus becomes in the system a solvent, a starting material for the cyclohexanone, and an acceptor of the hydrogen that forms as a by-product at the time of formation of the intended product. Hence, it becomes possible to obtain the intended product at a high selectivity from the anilines and phenylenediamines.The process of this invention is an advantageous process for the industrial production of especially the nuclearly substituted diphenylamines.

    摘要翻译: 二苯胺或N,N'-二苯基 - 苯二胺可以通过使苯胺或苯二胺与优选过量的苯酚反应来获得,苯酚的量为4至20摩尔/摩尔苯胺或苯二胺在氢气存在下 转移催化剂和对应于所述苯酚的环己酮。 在反应中使用的过量苯酚经历还原反应体系以形成环己酮,该环己酮又与苯胺或苯二胺反应形成希夫碱,因此被消耗。 希夫碱通过脱氢反应形成预期的产物,此时放出的氢还原酚形成环己酮。 因此,过量存在的苯酚在体系中形成溶剂,环己酮的起始原料和在形成所需产物时形成副产物的氢的受体。 因此,可以从苯胺和苯二胺以高选择性获得目标产物。 本发明的方法是工业生产特别是核取代的二苯胺的有利方法。

    Process for producing diphenylamines or N,N'-diphenyl-phenylenediamines
    69.
    发明授权
    Process for producing diphenylamines or N,N'-diphenyl-phenylenediamines 失效
    制备二苯胺或N,N'-二苯基 - 苯二胺的方法

    公开(公告)号:US4804783A

    公开(公告)日:1989-02-14

    申请号:US80440

    申请日:1987-07-31

    IPC分类号: C07C209/18 C07C85/06

    CPC分类号: C07C209/18

    摘要: Diphenylamines or N,N'-diphenyl-phenylenediamines can be obtained by heat-reacting an aniline or a phenylenediamine with preferably an excess of a phenol in an amount of 4 to 20 moles per mole of the aniline or phenylenediamine in the presence of a hydrogen transfer catalyst and a cyclohexanone corresponding to said phenol.The excess phenol used in the reaction undergoes reduction in the reaction system to form a cyclohexanone, which in turn reacts with the aniline or phenylenediamine to form a Schiff base and is thus consumed. The Schiff base forms the intended product by means of a dehydrogenation reaction, and the hydrogen evolved at this time reduces the phenol to form a cyclohexanone.The phenol present in excess thus becomes in the system a solvent, a starting material for the cyclohexanone, and an acceptor of the hydrogen that forms as a by-product at the time of formation of the intended product. Hence, it becomes possible to obtain the intended product at a high selectivity from the anilines and phenylenediamines.The process of this invention is an advantageous process for the industrial production of especially the nuclearly substituted diphenylamines.

    摘要翻译: 二苯胺或N,N'-二苯基 - 苯二胺可以通过使苯胺或苯二胺与优选过量的苯酚反应来获得,苯酚的量为4至20摩尔/摩尔苯胺或苯二胺在氢气存在下 转移催化剂和对应于所述苯酚的环己酮。 在反应中使用的过量苯酚经历还原反应体系以形成环己酮,该环己酮又与苯胺或苯二胺反应形成希夫碱,因此被消耗。 希夫碱通过脱氢反应形成预期的产物,此时放出的氢还原酚形成环己酮。 因此,过量存在的苯酚在体系中形成溶剂,环己酮的起始原料和在形成所需产物时形成副产物的氢的受体。 因此,可以从苯胺和苯二胺以高选择性获得目标产物。 本发明的方法是工业生产特别是核取代的二苯胺的有利方法。