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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:US07435319B2
公开(公告)日:2008-10-14
申请号:US10435886
申请日:2003-05-12
申请人: Ludwig Deibele , Dieter Heinz , Jan Thomas Leu , Johannes-Peter Schäfer , Kai Fahrenkamp , Wolfgang Scheinert , Thomas Schilling , Paul Wagner
发明人: Ludwig Deibele , Dieter Heinz , Jan Thomas Leu , Johannes-Peter Schäfer , Kai Fahrenkamp , Wolfgang Scheinert , Thomas Schilling , Paul Wagner
IPC分类号: B01D3/14 , C07C7/04 , C07C37/74 , C07C205/04
CPC分类号: B01D3/143 , B01D3/14 , B01D3/322 , Y10S203/07 , Y10S203/13
摘要: The invention relates to a semibatchwise process for the mild distillative separation of mixtures, in a first stage a column being supplied continuously with a feed and the feed being separated at least into different fractions, one of the fractions being removed continuously into a container, and, in a second step, the fraction removed into the container being recycled to the column and being separated again batchwise into different fractions.
摘要翻译: 本发明涉及用于混合物的温和蒸馏分离的半分批方法,在第一阶段中,连续供应进料的塔和至少分离成不同馏分的进料,其中一个馏分被连续地排入容器中, 在第二步中,将去除到容器中的馏分再循环到塔中并再分批分离成不同的馏分。
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公开(公告)号:US20080033139A1
公开(公告)日:2008-02-07
申请号:US11821456
申请日:2007-06-22
申请人: Michael Brockelt , Ludwig Deibele , Manfred Dietrich , Markus Hadley , Jan Leu , Guido Naberfeld , Ralf Dohrn
发明人: Michael Brockelt , Ludwig Deibele , Manfred Dietrich , Markus Hadley , Jan Leu , Guido Naberfeld , Ralf Dohrn
CPC分类号: C08G18/632 , C08G65/30 , C08G2290/00
摘要: The invention relates to a process for the purification of polymer polyols by stripping using packed columns.
摘要翻译: 本发明涉及通过使用填充柱进行汽提来纯化聚合物多元醇的方法。
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公开(公告)号:US4180438A
公开(公告)日:1979-12-25
申请号:US724052
申请日:1976-09-16
IPC分类号: B01D1/22 , B01D3/34 , C07D295/023
CPC分类号: C07D295/023 , B01D1/225 , B01D3/108 , B01D3/346 , Y10S203/90
摘要: A thin layer evaporator which has a vapor lock above the solvent inlet is used for the preparation of distillate-free sump product which is obtained as solid from the concentration of solutions of water, organic substances and non-volatile constituents and dissolved in solvents.
摘要翻译: 使用在溶剂入口上方具有蒸气锁的薄层蒸发器用于制备无馏出液体积产品,其从水,有机物质和非挥发性成分的溶液浓度溶解在溶剂中,作为固体获得。
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公开(公告)号:US07790804B2
公开(公告)日:2010-09-07
申请号:US11821456
申请日:2007-06-22
申请人: Michael Brockelt , Ludwig Deibele , Manfred Dietrich , Markus Hadley , Jan Thomas Leu , Guido Naberfeld , Ralf Dohrn
发明人: Michael Brockelt , Ludwig Deibele , Manfred Dietrich , Markus Hadley , Jan Thomas Leu , Guido Naberfeld , Ralf Dohrn
IPC分类号: C08L29/04
CPC分类号: C08G18/632 , C08G65/30 , C08G2290/00
摘要: The invention provides a process for the purification of polymer polyols that ensures a reduction of acrylonitrile, styrene as well as the residual amounts of optionally used chain regulator, and of occurring recombination products of the initiator when azo initiators are used, to levels of
摘要翻译: 本发明提供了一种纯化聚合物多元醇的方法,其确保丙烯腈,苯乙烯以及任选使用的链调节剂的残留量以及引发剂在使用偶氮引发剂时发生的重组产物的降低至<25 ppm的丙烯腈,<50ppm的苯乙烯,<50ppm的链调节剂和<280ppm的复合产物,通过使用填充柱进行汽提。
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公开(公告)号:US5336376A
公开(公告)日:1994-08-09
申请号:US54116
申请日:1993-04-27
CPC分类号: B01D3/14 , B01D5/0027 , B01D5/0063 , Y10S203/20 , Y10S203/90
摘要: In a distillation column with vaporous sidestream removal, the vaporous product removed is condensed in a condenser. The vapor pipe provided for the removal of product opens into a dip tank of which the upper end is connected to the condenser while its lower end is connected to a discharge pump. Inert gas present in the condensate is returned to the column above the sidestream removal through an inert gas pipe arranged at the upper end of the condenser.
摘要翻译: 在除去气态侧流的蒸馏塔中,除去的蒸汽产物在冷凝器中冷凝。 设置用于移除产品的蒸汽管通入浸渍槽,其上端连接到冷凝器,而其下端连接到排出泵。 存在于冷凝物中的惰性气体通过布置在冷凝器的上端的惰性气体管道返回到除侧流之外的塔。
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公开(公告)号:US20090032389A1
公开(公告)日:2009-02-05
申请号:US12206898
申请日:2008-09-09
申请人: Ludwig Deibele , Dieter Heinz , Jan Thomas Leu , Johannes-Peter Schafer , Kai Fahrenkamp , Wolfgang Scheinert , Thomas Schilling , Paul Wagner
发明人: Ludwig Deibele , Dieter Heinz , Jan Thomas Leu , Johannes-Peter Schafer , Kai Fahrenkamp , Wolfgang Scheinert , Thomas Schilling , Paul Wagner
IPC分类号: B01D3/00
CPC分类号: B01D3/143 , B01D3/14 , B01D3/322 , Y10S203/07 , Y10S203/13
摘要: The invention relates to a semibatchwise process for the mild distillative separation of mixtures, in a first stage a column being supplied continuously with a feed and the feed being separated at least into different fractions, one of the fractions being removed continuously into a container, and, in a second step, the fraction removed into the container being recycled to the column and being separated again batchwise into different fractions.
摘要翻译: 本发明涉及用于混合物的温和蒸馏分离的半分批方法,在第一阶段中,连续供应进料的塔和至少分离成不同馏分的进料,其中一个馏分被连续地排入容器中, 在第二步中,将去除到容器中的馏分再循环到塔中并再分批分离成不同的馏分。
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公开(公告)号:US5149890A
公开(公告)日:1992-09-22
申请号:US786479
申请日:1991-11-01
申请人: Gunther Rauchschwalbe , Heinz-Ulrich Blank , Ludwig Deibele , Kaspar Hallenberger , Gerhard Ruffert
发明人: Gunther Rauchschwalbe , Heinz-Ulrich Blank , Ludwig Deibele , Kaspar Hallenberger , Gerhard Ruffert
IPC分类号: C07C201/16 , C07C205/06
CPC分类号: C07C201/16
摘要: Pure or substantially enriched 2,4- and 2,6-dinitrotoluene can be isolated from a mixture containing these isomers if such a mixture is distilled under a pressure of 0.5 to 20 mbar at a temperature of 80.degree. to 200.degree. C. with exclusion of reducing conditions.
摘要翻译: 如果将这种混合物在0.5至20毫巴的压力下在80至200℃的温度下蒸馏而排除,则纯的或基本上富含的2,4-和2,6-二硝基甲苯可以从含有这些异构体的混合物中分离出来 的减少条件。
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公开(公告)号:US4148793A
公开(公告)日:1979-04-10
申请号:US832002
申请日:1977-09-09
IPC分类号: C07D201/16
CPC分类号: C07D201/16
摘要: Process for the removal of residues of solvent from crystallized .epsilon.-caprolactam, wherein the major quantity of solvent is removed in a first stage by distillation in the presence of water in an amount so that the water content of the residue of the first stage is from 0.5 to 6% by weight, and in a second stage by distilling water and any residues of solvent still present.
摘要翻译: 从结晶的ε-己内酰胺中除去溶剂残留物的方法,其中在第一阶段通过在水存在下蒸馏除去主要量的溶剂,其量使得第一阶段的残留物的水含量来自 0.5至6重量%,并且在第二阶段通过蒸馏水和仍然存在的溶剂的任何残留物。
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