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公开(公告)号：US4745216A
公开(公告)日：1988-05-17
申请号：US715716
申请日：1985-03-25
IPC分类号： C07C265/00 , C07C67/00 , C07C71/00 , C07C241/00 , C07C263/10 , C07C265/14
CPC分类号： C07C263/10 , C07C263/20
摘要： Polyisocyanates are produced by reacting a polyamide solution with a phosgene solution. After the product polyisocyanate has been recovered, the solvent or a portion of the solvent employed is treated with crosslinked polymers insoluble in the solvent which polymers contain primary and/or secondary alcoholic hydroxyl groups and/or primary and/or secondary amino groups. After treatment, the polymer and any reaction products are removed. The solvent may then be reused. Preferred solvents are chlorobenzene and o-dichlorobenzene. The preferred polymers are bead polymers or bead copolymers of (meth)acrylic acid or styrene/divinyl benzene copolymer.
摘要翻译： 聚异氰酸酯通过聚酰胺溶液与光气溶液反应制备。 在产物多异氰酸酯已被回收之后，溶剂或所用溶剂的一部分用不溶于溶剂的交联聚合物处理，该聚合物含有伯和/或仲醇羟基和/或伯和/或仲氨基。 处理后，除去聚合物和任何反应产物。 然后可以重新使用溶剂。 优选的溶剂是氯苯和邻二氯苯。 优选的聚合物是（甲基）丙烯酸或苯乙烯/二乙烯基苯共聚物的珠粒聚合物或珠粒共聚物。
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2.发明授权
公开(公告)号：US4774357A
公开(公告)日：1988-09-27
申请号：US638008
申请日：1984-08-06
IPC分类号： C07C265/14 , C07C67/00 , C07C241/00 , C07C263/20 , C07C265/12 , C08G18/72 , C08G18/75 , C09D175/00 , C07C143/00
CPC分类号： C07C263/20 , C07C263/18
摘要： Crude polyisocyanates are purified by extraction at a temperature from 80.degree. to 180.degree. C. to form a two-phase system. The phases are separated and the phase made up of purified polyisocyanate and solvent is cooled to a temperature which is at least 50.degree. C. below the extraction temperature. Upon cooling, a second two-phase system forms. Purified polyisocyanate containing residual solvent is recovered upon separation of these phases. Solvent in which polyisocyanate is present that is reclaimed during this process may be reused in subsequent extractions. The purified polyisocyanates have a viscosity which is lower than that of crude polyisocyanates having substantially the same isocyanate content and average functionality. These purified polyisocyanates are useful in the production of polyurethane foams and moldings as well as adhesives and coatings.
摘要翻译： 粗多异氰酸酯通过在80℃至180℃的温度下提取而纯化以形成两相体系。 分离各相，将由纯化的多异氰酸酯和溶剂组成的相冷却至低于提取温度至少50℃的温度。 冷却时，形成第二个两相系统。 在分离这些相后，回收含有残留溶剂的纯化多异氰酸酯。 在此过程中回收的多异氰酸酯存在的溶剂可以在随后的萃取中重复使用。 纯化的多异氰酸酯的粘度低于具有基本上相同的异氰酸酯含量和平均官能度的粗多异氰酸酯的粘度。 这些纯化的多异氰酸酯可用于生产聚氨酯泡沫和模制品以及粘合剂和涂料。
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公开(公告)号：US4597909A
公开(公告)日：1986-07-01
申请号：US703843
申请日：1985-02-21
IPC分类号： C07B61/00 , B01J27/00 , B01J27/10 , C07C67/00 , C07C209/00 , C07C209/78 , C07C211/50 , C07C241/00 , C07C263/10 , C07C265/14 , C07C118/02
CPC分类号： C07C265/14
摘要： The present invention is directed to a process for the production of polyamines of the diphenylmethane series having a high diamine content and a low 2,2'-diamino-diphenylmethane content by condensing aniline with formaldehyde in the presence of hydrochloric acid as catalyst, neutralizing the acid catalyst at the end of the condensation reaction and working up the polyamine mixture thus obtained by distillation, characterized in that(a) in a first reaction stage, from 2.0 to 3.5 moles of aniline are reacted with 1 mole of formaldehyde in the presence of hydrochloric acid or a condensation product produced from 2.0 to 3.5 moles of aniline and 1 mole of formaldehyde in the absence of acid catalyst is reacted in the presence of hydrochloric acid at a degree of protonation maintained at 40 to 60% at temperatures below 50.degree. C.,(b) more aniline is then added to the reaction mixture so that the molar ratio of amine nitrogen atoms in the form of free aniline and the reaction products formed in accordance with (a) to formaldehyde chemically bound in the form of methylene bridges in those reaction products rises to more than 10:1 and up to 20:1 with the degree of protonation decreasing correspondingly,(c) the reaction mixture obtained in accordance with (b) is heated to allow the N-substituted intermediate products present to be completely rearranged into polyamines containing unsubstituted primary amino groups, and(d) the reaction mixture obtained in accordance with (c) is worked up by distillation after neutralization of the acid.The invention is also directed to the use of the polyamines so produced in the manufacture of polyisocyanates.
摘要翻译： 本发明涉及一种通过在盐酸作为催化剂存在下使苯胺与甲醛缩合而制备二胺含量高和低二氨基二苯基甲烷含量低的二苯基甲烷系多胺的方法，中和 在酸性催化剂的缩合反应结束时，通过蒸馏处理由此得到的多胺混合物，其特征在于：（a）在第一反应阶段，将2.0-3.5摩尔苯胺与1摩尔甲醛在 在不存在酸催化剂的情况下，盐酸或由2.0-3.5摩尔苯胺和1摩尔甲醛生成的缩合产物在盐酸存在下在50℃以下的质子化程度保持在40至60％ （b）然后将更多的苯胺加入到反应混合物中，使得游离苯胺形式的胺氮原子与反应产物的摩尔比形成 根据（a），甲醛化学键合的甲醛在这些反应产物中的结构上升到10：1以上，质子化程度相应地降低到20：1，（c） 按照（b）加热以使存在的N-取代的中间产物完全重新排列成含有未取代的伯氨基的多胺，和（d）根据（c）获得的反应混合物在中和 酸。 本发明还涉及在制造多异氰酸酯中如此生产的多胺的用途。
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公开(公告)号：US07555917B2
公开(公告)日：2009-07-07
申请号：US10787608
申请日：2004-02-26
IPC分类号： F25J3/00
CPC分类号： B01D53/002 , C01B7/0706
摘要： High boiling contaminants such as chloro-aromatic compounds are removed from a gas by compressing the gas containing the contaminant, cooling the compressed gas to reduce the temperature of the gas to at least 20° C. above the outlet temperature of a second cooling stage but above the freezing point of the highest melting compound in the first cooling stage, further cooling the gas in a second cooling stage to at least −20° C., returning cooled gas from the second cooling stage to the first cooling stage, and recovering condensate streams which contain the contaminant compound from the first and second cooling stages. An apparatus suitable for carrying out this process is also disclosed. The process of the present invention is particularly useful for removing chloro-aromatic compounds from anhydrous hydrogen chloride gas.
摘要翻译： 通过压缩含有污染物的气体从气体中除去高沸点污染物，例如氯 - 芳族化合物，冷却压缩气体，将气体的温度降低至高于第二冷却阶段的出口温度至少20℃，但是 高于第一冷却阶段中最高熔融化合物的凝固点，在第二冷却阶段进一步将气体冷却至至少-20℃，将冷却的气体从第二冷却段返回到第一冷却阶段，并回收冷凝物 含有来自第一和第二冷却阶段的污染化合物的物流。 还公开了一种适于实施该方法的装置。 本发明的方法特别适用于从无水氯化氢气体中除去氯代芳族化合物。
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5.发明授权公开(公告)号：US07312362B2
公开(公告)日：2007-12-25
申请号：US11657338
申请日：2007-01-24
IPC分类号： C07C209/24
CPC分类号： C07C209/78 , C07C209/84 , C07C263/10 , C07C211/50 , C07C265/14
摘要： The present invention relates to a process for the production of mixtures of di- and polyamines of the diphenylmethane series (MDA) containing less than 1,000 ppm of water and less than 200 ppm of aniline by reaction of aniline and formaldehyde in the presence of acid catalysts and subsequent separation of the acid catalyst and subsequent distillative separation of water and aniline in an at least a two-stage distillation including a flash evaporation and subsequent cooling.
摘要翻译： 本发明涉及一种在酸催化剂存在下通过苯胺和甲醛的反应生产含有少于1,000ppm水和小于200ppm苯胺的二苯基甲烷系列（MDA）的二胺和多胺的混合物的方法 随后分离酸催化剂，随后在包括闪蒸和随后冷却的至少两阶段蒸馏中进行水和苯胺的蒸馏分离。
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公开(公告)号：US06719957B2
公开(公告)日：2004-04-13
申请号：US10124795
申请日：2002-04-17
IPC分类号： C01B707
CPC分类号： B01D53/002 , C01B7/0706
摘要： High boiling contaminants such as chloro-aromatic compounds are removed from a gas by compressing the gas containing the contaminant, cooling the compressed gas to reduce the temperature of the gas to at least 20° C. above the outlet temperature of a second cooling stage but above the freezing point of the highest melting compound in the first cooling stage, further cooling the gas in a second cooling stage to at least −20° C., returning cooled gas from the second cooling stage to the first cooling stage, and recovering condensate streams which contain the contaminant compound from the first and second cooling stages. An apparatus suitable for carrying out this process is also disclosed. The process of the present invention is particularly useful for removing chloro-aromatic compounds from anhydrous hydrogen chloride gas.
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7.发明授权Process for separating mixtures of materials having different boiling points 有权用于分离具有不同沸点的材料的混合物的方法公开(公告)号：US06359177B1
公开(公告)日：2002-03-19
申请号：US09738297
申请日：2000-12-15
IPC分类号： C07C20900
CPC分类号： C07C209/86 , C07C211/50
摘要： A mixture of materials having different boiling points is separated into fractions having different boiling points. The separated fraction containing the desired product is stripped using the vapors of a lower boiling fraction. The process of the present invention is particularly useful for recovering a desired isomer or isomer mixture from a technical mixture obtained during production of an aromatic amine such as toluenediamine. Little or no unwanted isomer or by-product is present in the isomer or isomer mixture product of this process.
摘要翻译： 具有不同沸点的材料的混合物被分离成具有不同沸点的级分。 使用较低沸点馏分的蒸汽汽提含有所需产物的分离馏分。 本发明的方法特别可用于从芳族胺如甲苯二胺制备期间获得的技术混合物中回收所需的异构体或异构体混合物。 在该方法的异构体或异构体混合物产物中不存在或不存在不需要的异构体或副产物。
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公开(公告)号：US10143987B2
公开(公告)日：2018-12-04
申请号：US12544267
申请日：2009-08-20
申请人： Berthold Keggenhoff , Jeffrey Bolton , Friedhelm Steffens , Marc Seekamp , Gerhard Ruffert , Jürgen Kern , Thomas Runowski
发明人： Berthold Keggenhoff , Jeffrey Bolton , Friedhelm Steffens , Marc Seekamp , Gerhard Ruffert , Jürgen Kern , Thomas Runowski
摘要： One or more fluid streams are uniformly divided into two or more partial fluid streams in chemical apparatuses in a manner such that there is a reduced tendency to form deposits. Division of such stream(s) is achieved by using a distributor device that includes at least one plate having two or more openings which openings are rounded or chamfered on at least one side.
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公开(公告)号：US08153838B2
公开(公告)日：2012-04-10
申请号：US12164716
申请日：2008-06-30
申请人： Andreas Bulan , Rainer Weber , Wolfgang Lorenz , Gerhard Moormann , Friedhelm Kämper , Berthold Keggenhoff
发明人： Andreas Bulan , Rainer Weber , Wolfgang Lorenz , Gerhard Moormann , Friedhelm Kämper , Berthold Keggenhoff
IPC分类号： C07C263/00
CPC分类号： C07C263/10 , C07C263/20 , C25B1/26 , C07C265/14
摘要： An isocyanate is produced by: (a) reacting chlorine with carbon monoxide to form phosgene, (b) reacting the phosgene with an organic amine to form an isocyanate and hydrogen chloride, (c) separating the isocyanate and hydrogen chloride, (d) optionally, purifying the hydrogen chloride, (e) preparing an aqueous solution of the hydrogen chloride, (f) optionally, purifying the aqueous solution of hydrogen chloride, (g) subjecting the aqueous hydrogen chloride solution to electrochemical oxidation to form chlorine, and (h) returning at least a portion of the chlorine produced in (g) to (a).
摘要翻译： 通过以下方法制备异氰酸酯：（a）使氯与一氧化碳反应以形成光气，（b）使光气与有机胺反应形成异氰酸酯和氯化氢，（c）将异氰酸酯和氯化氢分离，（d） ，纯化氯化氢，（e）制备氯化氢水溶液，（f）任选地，纯化氯化氢水溶液，（g）使氯化氢水溶液进行电化学氧化形成氯，和（h ）将（g）至（a）中产生的氯的至少一部分返回。
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公开(公告)号：US07442835B2
公开(公告)日：2008-10-28
申请号：US11211898
申请日：2005-08-25
IPC分类号： C07C51/58
CPC分类号： B01J8/0085 , B01J8/067 , B01J19/002 , B01J2208/00221 , B01J2208/00522 , B01J2208/00539 , B01J2208/00849 , B01J2208/025 , B01J2219/00268 , C01B32/80 , Y02P20/124
摘要： The invention relates to a process for the production of phosgene, in which chlorine and carbon monoxide are reacted in the presence of an activated charcoal catalyst in a shell-and-tube reactor which contains a plurality of reaction tubes and a coolant space surrounding the reaction tubes, in which a) cooling of the reaction tubes is from the outside through the coolant space with water by evaporative cooling, and b) operation of the reaction tubes is at a pressure above the pressure in the coolant space.
摘要翻译： 本发明涉及一种生产光气的方法，其中氯和一氧化碳在活性炭催化剂存在下在壳管式反应器中反应，其中包含多个反应管和围绕反应的冷却剂空间 管，其中a）通过蒸发冷却将反应管的冷却从外部通过冷却剂空间与水，以及b）反应管的操作处于高于冷却剂空间中的压力的压力。
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