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1. 发明申请

US20160376228A1 METHOD FOR PRODUCING ISOCYANATES 有权
公开(公告)号：US20160376228A1
公开(公告)日：2016-12-29
申请号：US15258530
申请日：2016-09-07
申请人： Covestro Deutschland AG
发明人： Rainer Bruns , Wolfgang Lorenz , Andreas Karl Rausch , Stefan Wershofen , Tim Loddenkemper
IPC分类号： C07C263/10 , C07C263/20
CPC分类号： C07C263/10 , C07C263/20 , Y02P20/582 , C07C265/14
摘要： The invention relates to a method for preparing isocyanates by phosgenating the corresponding amines, wherein low-boiling secondary components, excess phosgene, and the co-product hydrogen chloride are separated from the crude liquid isocyanate stream, which is obtained after the phosgenation has occurred, within a maximum of 60 minutes, and wherein the crude liquid isocyanate stream is not exposed to temperatures above 250° C. until said separation.

2. 发明申请

US20160068475A1 METHOD FOR PRODUCING DIAMINES AND POLYAMINES OF THE DIPHENYLMETHANE SERIES 有权
标题翻译：二氯甲烷系列二胺和聚氨酯的制备方法
公开(公告)号：US20160068475A1
公开(公告)日：2016-03-10
申请号：US14782926
申请日：2014-04-09
申请人： COVESTRO DEUTSCHLAND AG
发明人： Thomas Knauf , Wolfgang Lorenz , Stefan Wershofen , Richard Adamson , Karsten Becker
IPC分类号： C07C209/86 , C07C263/10 , C07C209/68 , B01D17/00 , C07C209/78
CPC分类号： C07C209/86 , B01D17/08 , B01D17/085 , C07C209/68 , C07C209/78 , C07C263/10 , C07C211/50 , C07C265/14
摘要： The invention relates to a method for producing diamines and polyamines of the diphenylmethane series, wherein first aniline and formaldehyde are reacted in the absence of an acidic catalyst to form a reaction mixture containing aminal and water and, after the water has been separated the aminal is reacted by acid catalysis to form a reaction mixture containing diamines and polyamines of the diphenylmethane series, wherein the separation of the water from the aminal is supported by the use of a coalescence aid. According to the invention, a filter bed made from coalescence fiber material is used an coalescence aid.
摘要翻译：本发明涉及二苯基甲烷系列二胺和多胺的制备方法，其中第一苯胺和甲醛在不存在酸性催化剂的情况下反应形成含有氨水和水的反应混合物，并且在水分离后，通过酸催化反应形成含二苯基甲烷系列的二胺和多胺的反应混合物，其中通过使用聚结助剂来支撑水从水杨酸的分离。根据本发明，由聚结纤维材料制成的过滤床用于聚结助剂。

3. 发明申请

US20170101367A1 METHOD FOR OPERATING A GAS-PHASE PHOSGENATION PLANT 有权
公开(公告)号：US20170101367A1
公开(公告)日：2017-04-13
申请号：US15128179
申请日：2015-03-24
申请人： COVESTRO DEUTSCHLAND AG
发明人： Thomas Knauf , Wolfgang Lorenz , Friedhelm Steffens , Rainer Bruns , Wolfgang Taube
IPC分类号： C07C263/10 , B01J12/00 , C07C263/20
CPC分类号： C07C263/10 , B01J12/005 , C01B32/80 , C07C263/20 , C07C265/14
摘要： This invention relates to a process for operating a gas phase phosgenation plant (100) to form an isocyanate (4) by reacting an amine (2) with phosgene (1), in which the gas phase phosgenation plant is started up by first charging the plant with phosgene. At the same time as, or after the first charge of phosgene, the amine supply devices are rendered inert using a hot inert gas stream (30). Then, amine is admixed for the first time. In this way and by maintaining a pressure drop in the amine and phosgene devices to the mixing zone, the back mixing of phosgene into the amine-containing reactant stream during start-up is prevented.

4. 发明申请

US20170096389A1 PROCESS FOR OPERATING A GAS PHASE PHOSGENATION PLANT 有权
公开(公告)号：US20170096389A1
公开(公告)日：2017-04-06
申请号：US15127826
申请日：2015-03-24
申请人： COVESTRO DEUTSCHLAND AG
发明人： Thomas Knauf , Wolfgang Lorenz , Friedhelm Steffens , Rainer Bruns , Wolfgang Taube
IPC分类号： C07C263/10 , B01J19/24 , B01J19/00
CPC分类号： C07C263/10 , B01J19/0006 , B01J19/24 , B01J2219/00027 , B01J2219/00164 , B01J2219/24 , C07C265/14
摘要： This invention relates to a process for operating a gas phase phosgenation plant (100) to form an isocyanate (4) by reacting an amine (2) with phosgene (1), in which the gas phase phosgenation plant is shut down by first stopping the amine stream and still maintaining the phosgene stream. After a period of time which corresponds to at least 10 times the residence time of phosgene (1) in the main parts of the gas phase phosgenation plant (100) in regular operation, calculated from the time at which the amine inflow has been completely stopped, the feed of phosgene is also stopped. An inert gas stream (3) is maintained through the amine and phosgene feeding devices and through all the other essential parts of the gas phase phosgenation plant (100) during the shutdown.

5. 发明授权

US09896407B2 Exhaust gas cleaning in a method for continuously producing dinitrotoluene 有权
公开(公告)号：US09896407B2
公开(公告)日：2018-02-20
申请号：US15514107
申请日：2015-09-29
申请人： Covestro Deutschland AG
发明人： Thomas Knauf , Jürgen Münnig , Wolfgang Lorenz , Bernd Pennemann
IPC分类号： C07C201/08 , C07C201/16 , C07C205/06 , B01D53/00
CPC分类号： C07C201/08 , B01D53/002 , B01D2257/7027 , C07C201/16 , C07C205/06
摘要： The invention relates to a method for producing dinitrotoluene, comprising the following steps: a) nitrating toluene with a mixture of nitric acid and sulfuric acid and subsequently separating a sulfuric-acid-containing aqueous phase that arises in the nitration, wherein a raw dinitrotoluene is obtained, b) washing the raw dinitrotoluene in a water wash with neutral and/or alkaline washing water, wherein a pre-cleaned dinitrotoluene, which contains at least water in addition to dinitrotoluene, is obtained after the washing water used in the last wash has been separated, and c) separating the water from the pre-cleaned dinitrotoluene, d) collecting the waste water from steps a), b), and/or c), e) optionally extracting the collected waste water from step d) with toluene and returning the thus obtained organic phase to step a), f) freeing the collected waste water from step d), or, if the optional step e) is performed, the extracted waste water from step e), of toluene in a toluene stripper, wherein a toluene-containing exhaust gas flow is obtained, g) feeding at least one exhaust gas flow from steps a), b), c), d), e), or f) into an exhaust gas condenser and removing the toluene contained in the at least one exhaust gas flow in said exhaust gas condenser, wherein the method comprises the following further step: h) feeding the exhaust gas flow arising in step g) after the condensing out of the toluene to a thermal exhaust air cleaning, wherein nitrogen is added to the exhaust gas flow to be fed to the exhaust gas condenser or to the exhaust gas flow leaving the exhaust gas condenser, wherein preferably a nitrogen concentration in the exhaust gas flow of at least 0.1 vol % is set, especially preferably of at least 0.5 vol %.

6. 发明授权

US09416094B2 Process for the preparation of di- and polyamines of the diphenylmethane series 有权
标题翻译：制备二苯基甲烷系列的二胺和多胺的方法
公开(公告)号：US09416094B2
公开(公告)日：2016-08-16
申请号：US14783163
申请日：2014-04-08
申请人： Covestro Deutschland AG
发明人： Thomas Knauf , Wolfgang Lorenz , Stefan Wershofen , Richard Adamson , Karsten Becker
IPC分类号： C07C209/78 , C07C263/10
CPC分类号： C07C209/78 , C07C263/10 , C07C2601/16 , C07C211/44 , C07C265/12
摘要： The invention relates to a method for producing diamines and polyamines of the diphenylmethane series in which, by using a coalescence auxiliary in the phase separation of the process product obtained in the scrubbing of the neutralized crude product, the fraction of water and thus also of water-soluble impurities in the organic MDA-containing phase is reduced. According to the invention, the coalescence auxiliary used is a filter bed made of coalescence fiber material. The di- and polyamines of the diphenylmethane series obtained after distillative purification of this MDA-containing organic phase are exceptionally suitable for the preparation of the corresponding isocyanates.
摘要翻译：本发明涉及一种生产二苯基甲烷系列二胺和多胺的方法，其中通过在洗涤中和的粗产物中获得的工艺产物的相分离中使用聚结助剂，水和水的分数有机MDA相中的可溶性杂质减少。根据本发明，所使用的聚结助剂是由聚结纤维材料制成的过滤床。在这种含MDA的有机相的蒸馏纯化后获得的二苯基甲烷系列的二胺和多胺特别适用于制备相应的异氰酸酯。

7. 发明授权

US09840461B2 Method for operating a gas-phase phosgenation plant 有权
公开(公告)号：US09840461B2
公开(公告)日：2017-12-12
申请号：US15128179
申请日：2015-03-24
申请人： Covestro Deutschland AG
发明人： Thomas Knauf , Wolfgang Lorenz , Friedhelm Steffens , Rainer Bruns , Wolfgang Taube
IPC分类号： C07C263/00 , C07C263/10 , C07C263/20 , C01B31/28 , B01J12/00
CPC分类号： C07C263/10 , B01J12/005 , C01B32/80 , C07C263/20 , C07C265/14
摘要： This invention relates to a process for operating a gas phase phosgenation plant (100) to form an isocyanate (4) by reacting an amine (2) with phosgene (1), in which the gas phase phosgenation plant is started up by first charging the plant with phosgene. At the same time as, or after the first charge of phosgene, the amine supply devices are rendered inert using a hot inert gas stream (30). Then, amine is admixed for the first time. In this way and by maintaining a pressure drop in the amine and phosgene devices to the mixing zone, the back mixing of phosgene into the amine-containing reactant stream during start-up is prevented.

8. 发明授权

US09695115B2 Method for producing isocyanates 有权
公开(公告)号：US09695115B2
公开(公告)日：2017-07-04
申请号：US15258530
申请日：2016-09-07
申请人： Covestro Deutschland AG
发明人： Rainer Bruns , Wolfgang Lorenz , Andreas Karl Rausch , Stefan Wershofen , Tim Loddenkemper
IPC分类号： C07C263/10 , C07C263/20
CPC分类号： C07C263/10 , C07C263/20 , Y02P20/582 , C07C265/14
摘要： The invention relates to a method for preparing isocyanates by phosgenating the corresponding amines, wherein low-boiling secondary components, excess phosgene, and the co-product hydrogen chloride are separated from the crude liquid isocyanate stream, which is obtained after the phosgenation has occurred, within a maximum of 60 minutes, and wherein the crude liquid isocyanate stream is not exposed to temperatures above 250° C. until said separation.

9. 发明授权

US09309184B2 Method for producing diamines and polyamines of the diphenylmethane series 有权
标题翻译：二苯甲烷系列二胺和多胺的制备方法
公开(公告)号：US09309184B2
公开(公告)日：2016-04-12
申请号：US14782926
申请日：2014-04-09
申请人： Covestro Deutschland AG
发明人： Thomas Knauf , Wolfgang Lorenz , Stefan Wershofen , Richard Adamson , Karsten Becker
IPC分类号： C07C209/86 , C07C209/78 , C07C209/68 , B01D17/00 , C07C263/10
CPC分类号： C07C209/86 , B01D17/08 , B01D17/085 , C07C209/68 , C07C209/78 , C07C263/10 , C07C211/50 , C07C265/14
摘要： The invention relates to a method for producing diamines and polyamines of the diphenylmethane series, wherein first aniline and formaldehyde are reacted in the absence of an acidic catalyst to form a reaction mixture containing animal and water and, after the water has been separated the aminal is reacted by acid catalysis to form a reaction mixture containing diamines and polyamines of the diphenylmethane series, wherein the separation of the water from the aminal is supported by the use of a coalescence aid. According to the invention, a filter bed made front coalescence fiber material is used an coalescence aid.
摘要翻译：本发明涉及一种生产二苯基甲烷系列二胺和多胺的方法，其中第一苯胺和甲醛在不存在酸性催化剂的情况下反应形成含有动物和水的反应混合物，水分离后，通过酸催化反应形成含二苯基甲烷系列的二胺和多胺的反应混合物，其中通过使用聚结助剂来支撑水从水杨酸的分离。根据本发明，使用制成前聚结纤维材料的过滤床作为聚结助剂。

10. 发明申请

US20160068473A1 PROCESS FOR THE PREPARATION OF DI- AND POLYAMINES OF THE DIPHENYLMETHANE SERIES 有权
标题翻译：制备二苯乙烯系列的二异氰酸酯的方法
公开(公告)号：US20160068473A1
公开(公告)日：2016-03-10
申请号：US14783163
申请日：2014-04-08
申请人： Covestro Deutschland AG
发明人： Thomas Knauf , Wolfgang Lorenz , Stefan Wershofen , Richard Adamson , Karsten Becker
IPC分类号： C07C209/78 , C07C263/10
CPC分类号： C07C209/78 , C07C263/10 , C07C2601/16 , C07C211/44 , C07C265/12
摘要： The invention relates to a method for producing diamines and polyamines of the diphenylmethane series, wherein first aniline and formaldehyde are reacted in the absence of an acidic catalyst to form a reaction mixture containing aminal and water and, after the water has been separated, the aminal is reacted by acid catalysis to form a reaction mixture containing diamines and polyamines of the dephenylmethane series, wherein the separation of the water and aminal is supported by the use of a coalescence aid. According to the invention, a filter bed made of coalescence fiber material is used as coalescence aid.
摘要翻译：本发明涉及一种生产二苯基甲烷系列二胺和多胺的方法，其中第一苯胺和甲醛在不存在酸性催化剂的情况下反应形成含有胺和水的反应混合物，并且在水分离后，通过酸催化反应形成含有二苯基甲烷系列的二胺和多胺的反应混合物，其中通过使用聚结助剂来支持水和胺的分离。根据本发明，使用由聚结纤维材料制成的过滤床作为聚结助剂。

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