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公开(公告)号：US08710267B2
公开(公告)日：2014-04-29
申请号：US13265271
申请日：2010-04-19
IPC分类号： C07C211/00 , C09B11/02
CPC分类号： C07C209/78 , C07C209/62 , C07C211/50
摘要： The invention relates to a process for preparing methylenediphenyldiamine (MDA), comprising the following steps a) to c): a) converting formaldehyde and aniline to aminal b) removing water from the aminal obtained in step a) to establish a water content of 0 to 5% by weight based on the aminal, and c) adding an acidic catalyst to the aminal having a water content of 0 to 5% by weight, which comprises using formaldehyde in step a) in the form of highly concentrated formaldehyde with a CH2O content of >50% by weight and preparing the formaldehyde by oxidative dehydrogenation from methanol.
摘要翻译： 本发明涉及一种制备亚甲基二苯基二胺（MDA）的方法，包括以下步骤a）至c）：a）将甲醛和苯胺转化为缩醛; b）从步骤a）中获得的阿米尔液中除去水，以确定含水量为0 至5重量％，以及c）向具有0-5重量％水含量的氨基酸中加入酸性催化剂，其包括在步骤a）中使用甲醛以高浓度甲醛与CH 2 O形式 含量> 50重量％，并通过甲醇氧化脱氢制备甲醛。
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2.发明授权Process for simultaneously preparing 4,4′-diphenylmethanediamine and diphenylmethane diisocyanate and polyphenylenepolymethylene polyisocyanates 有权同时制备4,4'-二苯基甲烷二胺和二苯基甲烷二异氰酸酯和聚亚苯基多亚甲基多异氰酸酯的方法公开(公告)号：US07709679B2
公开(公告)日：2010-05-04
申请号：US12160163
申请日：2007-01-12
IPC分类号： C07C263/10 , C07C209/60
CPC分类号： C07C209/78 , C07C209/84 , C07C263/10 , C07C211/50 , C07C265/12
摘要： The invention provides a process for the simultaneous preparation of 4,4′-diphenylmethanediamine and also diphenylmethane diisocyanate and polyphenylenepolymethylene polyisocyanates, which comprises the steps a) preparation of a mixture of diphenylmethanediamine and polyphenylenepolymethylenepolyamines by acid condensation of aniline and formaldehyde and subsequent work-up of the mixture, b) splitting-off of part of the mixture prepared in step a), c) distillation of the mixture separated off in step b) in a column, d) recirculation of the bottom product from step c) to the end product from step a) and condensation of the overhead product from step c), e) distillation of the overhead product from step c) in a column, f) recirculation of the overhead product from step e) to the end product from step a), g) isolation of the 4,4′-diphenylmethanediamine obtained as bottom product in step e), h) reaction of the mixture from step a) with phosgene and subsequent work-up of the reaction product.
摘要翻译： 本发明提供了同时制备4,4'-二苯基甲二胺和二苯基甲烷二异氰酸酯和聚亚苯基多亚甲基多异氰酸酯的方法，其包括以下步骤：a）通过苯胺和甲醛的酸缩合制备二苯基甲二胺和聚亚苯基多亚甲基多胺的混合物，随后的后处理 的混合物，b）分离步骤a）中制备的一部分混合物，c）在柱中蒸馏步骤b）中分离出的混合物，d）将底部产物从步骤c）再循环到末端 来自步骤a）的产物和来自步骤c）的塔顶馏出物的冷凝，e）在柱中蒸馏步骤c）的塔顶馏出物，f）将塔顶产物从步骤e）再循环到来自步骤a）的最终产物， g）分离步骤e）中作为底部产物获得的4,4'-二苯基甲二胺二糖，h）步骤a）的混合物与光气反应，随后后处理反应物 产品
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3.发明申请Process for Simultaneously Preparing 4,4'- Diphenylmethanediamine and Diphenylmethane Diisocyanate and Polyphenylenepolymethylene Polyisocyanates 有权同时制备4,4'-二苯基甲二胺和二苯甲烷二异氰酸酯和多亚苯基聚亚甲基多异氰酸酯的方法公开(公告)号：US20090005596A1
公开(公告)日：2009-01-01
申请号：US12160163
申请日：2007-01-12
IPC分类号： C07C211/09
CPC分类号： C07C209/78 , C07C209/84 , C07C263/10 , C07C211/50 , C07C265/12
摘要： The invention provides aprocess for the simultaneous preparation of 4,4′-diphenylmethanediamine and also diphenylmethane diisocyanate and polyphenylenepolymethylene polyisocyanates, which comprises the steps a) preparation of a mixture of diphenylmethanediamine and polyphenylenepolymethylenepolyamines by acid condensation of aniline and formaldehyde and sub-sequent work-up of the mixture, b) splitting-off of part of the mixture prepared in step a), c) distillation of the mixture separated off in step b) in a column, d) recirculation of the bottom product from step c) to the end product from step a) and condensation of the overhead product from step c), e) distillation of the overhead product from step c) in a column, f) recirculation of the overhead product from step e) to the end product from step a), g) isolation of the 4,4′-diphenylmethanediamine obtained as bottom product in step e), h) reaction of the mixture from step a) with phosgene and subsequent work-up of the reaction product.
摘要翻译： 本发明提供了同时制备4,4'-二苯基甲烷二胺以及二苯基甲烷二异氰酸酯和聚亚苯基多亚甲基多异氰酸酯的方法，其包括以下步骤：a）通过苯胺和甲醛的酸缩合制备二苯基甲二胺和聚亚苯基多亚甲基多胺的混合物， - b）分离步骤a）中制备的部分混合物，c）在柱中蒸馏步骤b）中分离出的混合物，d）将底部产物从步骤c）再循环至 来自步骤a）的最终产物和来自步骤c）的塔顶馏出物的缩合，e）将柱子产物从步骤c）中蒸馏出来，f）将塔顶产物从步骤e）再循环到来自步骤 a），g）分离步骤e）中作为底部产物获得的4,4'-二苯基甲烷二胺，h）步骤a）的混合物与光气的反应和随后的反应产物的后处理 ct。
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公开(公告)号：US20120035396A1
公开(公告)日：2012-02-09
申请号：US13265271
申请日：2010-04-19
IPC分类号： C07C209/78 , C07C211/55
CPC分类号： C07C209/78 , C07C209/62 , C07C211/50
摘要： The invention relates to a process for preparing methylenediphenyldiamine (MDA), comprising the following steps a) to c): a) converting formaldehyde and aniline to aminal b) removing water from the aminal obtained in step a) to establish a water content of 0 to 5% by weight based on the aminal, and c) adding an acidic catalyst to the aminal having a water content of 0 to 5% by weight, which comprises using formaldehyde in step a) in the form of highly concentrated formaldehyde with a CH2O content of >50% by weight and preparing the formaldehyde by oxidative dehydrogenation from methanol.
摘要翻译： 本发明涉及一种制备亚甲基二苯基二胺（MDA）的方法，包括以下步骤a）至c）：a）将甲醛和苯胺转化成缩醛; b）从步骤a）中获得的阿米尔液中除去水，以确定含水量为0 至5重量％，以及c）向具有0-5重量％水含量的氨基酸中加入酸性催化剂，其包括在步骤a）中使用甲醛以高浓度甲醛与CH 2 O形式 含量> 50重量％，并通过甲醇氧化脱氢制备甲醛。
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