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公开(公告)号:US5616784A
公开(公告)日:1997-04-01
申请号:US570250
申请日:1995-12-11
申请人: Hans V. Schwarz , Andreas Otterbach , Otto Mattner , Franz Merger , Wolfgang Schwarz , Eckhardt Brandt , Peter Magnussen , Roland Minges
发明人: Hans V. Schwarz , Andreas Otterbach , Otto Mattner , Franz Merger , Wolfgang Schwarz , Eckhardt Brandt , Peter Magnussen , Roland Minges
IPC分类号: B01J6/00 , C07C263/04 , C07C265/00 , C07C271/06 , C07C45/00
CPC分类号: C07C263/04
摘要: In a reactor for the thermal cleavage of mono- and polyfunctional carbamic esters into the corresponding isocyanates and the hydroxyl component in the liquid phase, the geometry of the reactor, defined by the degassing area in relation to the volume and the arrangement of the heating surfaces, permits cleavage in a two-phase mixture which has a volumetric gas content of more than 50%.
摘要翻译: 在用于将单官能和多官能的氨基甲酸酯热裂解成相应的异氰酸酯和液相中的羟基组分的反应器中,由相对于体积的排气面积和加热表面的排列限定的反应器的几何形状 允许在体积气体含量大于50%的两相混合物中断裂。
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公开(公告)号:US5386053A
公开(公告)日:1995-01-31
申请号:US28009
申请日:1993-03-08
申请人: Andreas Otterbach , Hans V. Schwarz , Franz Merger , Wolfgang Schwarz , Eckhardt Brandt , Peter Magnussen , Otto Mattner
发明人: Andreas Otterbach , Hans V. Schwarz , Franz Merger , Wolfgang Schwarz , Eckhardt Brandt , Peter Magnussen , Otto Mattner
IPC分类号: C08G18/72 , C07C263/00 , C07C263/04 , C07C263/20 , C07C265/00 , C07C265/04 , C07C265/10 , C07C265/14 , C08G71/00 , C08G71/04 , C07C263/06
CPC分类号: C07C263/04 , C07C2101/14 , Y02P20/582
摘要: A multistep process for the continuous preparation of organic polyisocyanates, preferably aliphatic or cycloaliphatic diisocyanates, by reacting the corresponding organic polyamines with carbonic acid derivatives and alcohols to give monomeric polyurethanes and pyrolyzing the latter involves separating the resultant polyisocyanates and worthless residues in certain reaction steps and recycling the reusable by-products into earlier steps.
摘要翻译: 通过使相应的有机多胺与碳酸衍生物和醇反应得到单体聚氨酯并热解后者,连续制备有机多异氰酸酯,优选脂族或环脂族二异氰酸酯的多步骤方法包括在某些反应步骤中分离得到的多异氰酸酯和无价值残基, 将可重复使用的副产品回收到早期步骤中。
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公开(公告)号:US5683553A
公开(公告)日:1997-11-04
申请号:US580252
申请日:1995-12-28
IPC分类号: C07D307/89 , B01D3/14 , C07C51/573 , B01D3/42
CPC分类号: C07C51/573
摘要: A process for preparing essentially pure 3-chlorophthalic anhydride from a mixture in which 3-chlorophthalic anhydride is present in addition to 4,5-dichlorophthalic anhydride, which involves first distilling off a mixture of 3-chlorophthalic anhydride and 4,5-dichlorophthalic anhydride, so that the obtained bottoms is essentially free of 4,5-dichlorophthalic anhydride, and then by distillation of the obtained bottoms, recovering 3-chlorophthalic anhydride in a second distillation step. The starting mixture is preferably prepared without solvent in a melt by incomplete chlorination of phthalic anhydride using FeCl.sub.3 as a catalyst.
摘要翻译: 除了4,5-二氯邻苯二甲酸酐之外,还存在其中存在3-氯邻苯二甲酸酐的混合物中制备基本上纯的3-氯邻苯二甲酸酐的方法,其涉及首先蒸馏出3-氯邻苯二甲酸酐和4,5-二氯邻苯二甲酸酐的混合物 得到的底物基本上不含4,5-二氯邻苯二甲酸酐,然后蒸馏得到的底物,在第二蒸馏步骤中回收3-氯邻苯二甲酸酐。 起始混合物优选通过使用FeCl 3作为催化剂不完全氯化邻苯二甲酸酐而在熔体中无溶剂制备。
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