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1. 发明授权

US4369327A Preparation of phthalic anhydride 失效
标题翻译：邻苯二甲酸酐的制备
公开(公告)号：US4369327A
公开(公告)日：1983-01-18
申请号：US313177
申请日：1981-10-20
申请人： Dieter Stockburger , Wilhelm Schultz , Johannes E. Schmidt , Friedrich Wirth , Herwig Hoffmann , Bernhard Holzknecht , Klaus Wintermantel
发明人： Dieter Stockburger , Wilhelm Schultz , Johannes E. Schmidt , Friedrich Wirth , Herwig Hoffmann , Bernhard Holzknecht , Klaus Wintermantel
IPC分类号： C07D307/89 , C07C51/265 , C07C51/31
CPC分类号： C07C51/265 , C07C51/313
摘要： A process for the preparation of phthalic anhydride (PA) of catalytic oxidation of naphthalene or o-xylene with air, a preheated mixture of air and naphthalene or o-xylene being passed into a reactor charged with the catalyst, and the reaction gas leaving the reactor being passed through a separator in which the PA is separated out as a solid, in which process the air fed to the reactor is preheated, before or after the admixture of naphthalene or of o-xylene, by using it to cool the reaction gas in the PA separator.
摘要翻译：制备萘和邻二甲苯与空气催化氧化邻苯二甲酸酐（PA）的方法，将预热的空气和萘或邻二甲苯的混合物送入装有催化剂的反应器中，并将反应气体离开反应器通过分离器，其中PA作为固体分离，在该过程中，在萘或邻二甲苯的混合之前或之后，通过使用它来冷却反应气体，将进料到反应器的空气预热在PA分离器中。

2. 发明授权

US4795571A Purification of frozen crystal layers 失效
标题翻译：冷冻晶体层的净化
公开(公告)号：US4795571A
公开(公告)日：1989-01-03
申请号：US154227
申请日：1988-02-10
申请人： Bernhard Holzknecht , Hugo Fuchs , Eckhard Hetzel , Klaus Wintermantel , Peter Thoma
发明人： Bernhard Holzknecht , Hugo Fuchs , Eckhard Hetzel , Klaus Wintermantel , Peter Thoma
IPC分类号： B01D9/00 , B01D9/02 , B01D9/04 , C07B63/00 , C07C67/00 , C07C241/00 , C07C265/14 , C07D201/16
CPC分类号： C07D201/16 , B01D9/0013
摘要： Frozen crystal layers are purified by a process in which these crystal layers, after they have been frozen out from a melt or solution on a cooling surface, are brought into contact with a purifying liquid and thus purified over their entire thickness, after which the said layers are separated from the purifying liquid and then melted, wherein the temperature of the crystal layers and of the purifying liquid is close to the melting point or solubility temperature, mass transfer at the phase boundary is intensified by forced convection, and this purification is carried out in the course of from 1 to 60 minutes on layers having a thickness of from 0.2 to 10 mm.
摘要翻译：冷冻的晶体层通过这些方法纯化，其中这些晶体层在从冷却表面上的熔体或溶液中冷冻出来之后，与净化液体接触并由此在其整个厚度上净化，之后所述将层与净化液分离，然后熔融，其中晶体层和净化液的温度接近熔点或溶解温度，通过强制对流加强相边界处的质量传递，并进行该纯化在厚度为0.2至10mm的层上为1至60分钟的过程。

3. 发明授权

US4882430A Recovery of caprolactam from caprolactam distillation low boilers or high boilers or mixtures thereof 失效
标题翻译：从己内酰胺蒸馏低沸点锅炉或高锅炉或其混合物中回收己内酰胺
公开(公告)号：US4882430A
公开(公告)日：1989-11-21
申请号：US257274
申请日：1988-10-13
申请人： Gerald Neubauer , Emile De Decker , Hugo Fuchs , Bernhard Holzknecht , Josef Ritz
发明人： Gerald Neubauer , Emile De Decker , Hugo Fuchs , Bernhard Holzknecht , Josef Ritz
IPC分类号： C07D201/16
CPC分类号： C07D201/16
摘要： Caprolactam is recovered from caprolactam distillation low boilers or high boilers or mixtures thereof by the following steps:(a) crystallizing a low or high boiler or a mixture thereof to form purified capro-lactam crystals and a mother liquor,(b) separating off the purified caprolactam crystals to leave a mother liquor,(c) recycling from 5 to 90% by weight of the mother liquor of stage (b) into stage (a) and transferring the remainder of the mother liquor into the subsequent stage (d),(d) crystallizing the remaining mother liquor portion from stage (c) to form caprolactam crystals and a mother liquor, separating off the caprolactam crystals of stage(e) (d) and recycling the same into stage (a) to leave a mother liquor,(f) recycling from 20 to 99% by weight of mother liquor of stage (e) into stage (d) and channeling out the remainder of the impurity-containing mother liquor of stage (e).
摘要翻译：通过以下步骤从己内酰胺蒸馏低锅炉或高锅炉或其混合物回收己内酰胺：（a）使低或高锅炉或其混合物结晶以形成纯化的己内酰胺结晶和母液，（b）将纯化的己内酰胺晶体离开母液，（c）将阶段（b）的母液的5至90重量％循环到阶段（a）中，并将剩余的母液转移到后续阶段（d）中，（d）从阶段（c）中将剩余的母液部分结晶以形成己内酰胺晶体和母液，分离阶段（e）（d）的己内酰胺晶体并将其再循环到阶段（a）中以留下母液，（f）将阶段（e）的母液的20至99重量％循环到阶段（d）中，并且引出阶段（e）的含杂质母液的剩余部分。

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