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公开(公告)号:US5731458A
公开(公告)日:1998-03-24
申请号:US811801
申请日:1997-03-06
申请人: Jurgen Dahmer , Dieter Schleenstein , Heinrich Steude , Oswald Wilmes , Christian Rasp , Georg Ronge , Klaus Nachtkamp , Wilfried Litz , Stephan Kabelac
发明人: Jurgen Dahmer , Dieter Schleenstein , Heinrich Steude , Oswald Wilmes , Christian Rasp , Georg Ronge , Klaus Nachtkamp , Wilfried Litz , Stephan Kabelac
IPC分类号: C07C263/04 , C07C265/04 , C07C265/14 , C07C269/06 , C07C271/20
CPC分类号: C07C263/04 , Y02P20/127 , Y02P20/582
摘要: This present invention relates to a process for thermally cracking carbamic acid esters into the corresponding isocyanate and hydroxyl compounds in the liquid phase, wherein the reaction proceeds as a reactive rectification in the stripping zone of a column and in an inert, high-boiling solvent, which acts as a buffer to keep the reaction away from the evaporator region of the column.
摘要翻译: 本发明涉及一种将氨基甲酸酯热裂解成液相中相应的异氰酸酯和羟基化合物的方法,其中反应在塔的汽提区和惰性高沸点溶剂中作为反应性精馏进行, 其用作缓冲剂以使反应远离柱的蒸发器区域。
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公开(公告)号:US5646328A
公开(公告)日:1997-07-08
申请号:US667893
申请日:1996-06-20
申请人: Ludwig Deibele , Oswald Wilmes , Jurgen Dahmer
发明人: Ludwig Deibele , Oswald Wilmes , Jurgen Dahmer
IPC分类号: C07C269/08 , C07C271/20 , C07C263/00
CPC分类号: C07C269/08
摘要: Low-boiling by-products are removed from diurethanes prepared by a phosgene-free process by carrier vapor distillation using alcohol vapor, preferably the vapor of the basic alcohol found in the diurethane, as the carrier vapor. The diurethanes freed of low-boiling by-products in this manner may be thermally decomposed to produce diisocyanates.
摘要翻译: 作为载体蒸气,使用乙醇蒸气(优选二氨基甲酸乙酯中发现的碱性醇的蒸气)作为载体蒸气,通过载气蒸气蒸馏由无光气的方法制备的低沸点副产物被除去。 以这种方式排出低沸点副产物的二氨基甲酸酯可以被热分解以产生二异氰酸酯。
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公开(公告)号:US5789620A
公开(公告)日:1998-08-04
申请号:US962072
申请日:1997-10-31
申请人: Helmut Waldmann , Jurgen Dahmer , Klaus Nachtkamp , Anatoly Bazanov , Alexandre Timofeev , Natalja Zubritskaya , Gennady Terechtchenko
发明人: Helmut Waldmann , Jurgen Dahmer , Klaus Nachtkamp , Anatoly Bazanov , Alexandre Timofeev , Natalja Zubritskaya , Gennady Terechtchenko
IPC分类号: C07C209/16 , C07C211/18
CPC分类号: C07C209/16 , C07C2101/14
摘要: The present invention relates to a process for preparing 1,4-bis(aminomethyl)cyclohexane by reacting a 40 to 80 wt. % aqueous solution of 1,4-bis(hydroxymethyl)cyclohexane with a mixture of hydrogen and ammonia in the presence of a nickel/copper/chromium catalyst at a pressure of 100 to 250 bar and a temperature of 150.degree. to 250.degree. C.
摘要翻译: 本发明涉及一种制备1,4-双(氨基甲基)环己烷的方法,该方法是使40至80wt。 %的镍/铜/铬催化剂存在下,在氢气和氨的混合物下,在100-250巴的压力和150-250℃的温度下,1,4-双(羟甲基)环己烷的%水溶液。
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公开(公告)号:US5801285A
公开(公告)日:1998-09-01
申请号:US961675
申请日:1997-10-31
申请人: Helmut Waldmann , Jurgen Dahmer , Anatoly Bazanov , Alexandre Timofeev , Natalja Zubritskaya , Gennady Terechtchenko
发明人: Helmut Waldmann , Jurgen Dahmer , Anatoly Bazanov , Alexandre Timofeev , Natalja Zubritskaya , Gennady Terechtchenko
IPC分类号: C07C209/26 , C07C209/62 , C07C211/09 , C07C211/11 , C07D239/06
CPC分类号: C07D239/06 , C07C209/62
摘要: The present invention relates to a process for preparing 2-methyl-2,4-diaminopentane by introducing acetone, ammonia and hydrogen into a two-zone reactor at a temperature of 20.degree. to 130.degree. C. and a pressure of 30 to 250 bar, wherein the first zone contains a cationic exchange resin containing NH.sub.4.sup..sym. groups or an aluminum oxide and/or silicon oxide catalyst and the second zone contains a hydrogenation catalyst containing nickel.
摘要翻译: 本发明涉及一种通过将丙酮,氨和氢气在20℃至130℃的温度和30至250巴的压力下引入双区反应器中制备2-甲基-2,4-二氨基戊烷的方法 ,其中所述第一区含有含有NH 4(+)基团的阳离子交换树脂或氧化铝和/或氧化硅催化剂,所述第二区含有含镍的氢化催化剂。
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公开(公告)号:US5831111A
公开(公告)日:1998-11-03
申请号:US850474
申请日:1997-05-05
申请人: Pieter Ooms , Eric Bischof , Hans-Josef Buysch , Steffen Kuhling , Gottfried Zaby , Wolfgang Jakob , Jurgen Dahmer , Norbert Schon
发明人: Pieter Ooms , Eric Bischof , Hans-Josef Buysch , Steffen Kuhling , Gottfried Zaby , Wolfgang Jakob , Jurgen Dahmer , Norbert Schon
CPC分类号: C07C68/02
摘要: The present invention relates to a process for the continuous production of carbonates having aromatic ester groups by reacting aromatic hydroxy compounds with phosgene in the gas phase in the presence of heterogeneous catalysts.
摘要翻译: 本发明涉及一种在非均相催化剂存在下,通过气相中芳族羟基化合物与光气反应连续生产具有芳族酯基的碳酸酯的方法。
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公开(公告)号:US5516935A
公开(公告)日:1996-05-14
申请号:US413646
申请日:1995-03-30
申请人: Eric Bischof , Peter Briedenbach , Jurgen Dahmer , Andreas Flink , Attila Molnar , Herbert Stutz
发明人: Eric Bischof , Peter Briedenbach , Jurgen Dahmer , Andreas Flink , Attila Molnar , Herbert Stutz
IPC分类号: C07C263/10 , C07C265/14 , C07C263/00
CPC分类号: C07C263/10 , C07C2101/14
摘要: Diisocyanates are produced by gas-phase phosgenation of aliphatic diamines having two primary amino groups in the 1,2- or 1,3-position to one another or by cycloaliphatic diamines having two primary amino groups in the 1,2- or 1,3-position to one another.
摘要翻译: 二异氰酸酯是通过在1,2-或1,3-位上具有两个伯氨基的脂族二胺或在1,2-或1,3中具有两个伯氨基的脂环族二胺气相光气化而制备的 彼此相对。
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