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1. 发明申请

US20070265462A1 Method for Producing Amino- or Hydroxybenzonitriles 有权
标题翻译：生产氨基或羟基苯腈的方法
公开(公告)号：US20070265462A1
公开(公告)日：2007-11-15
申请号：US11791579
申请日：2005-11-29
申请人： Roland Moller , Mario Gomez , Klaus Einmayr , Jens Hildebrad , Hans-Georg Erben , Hans-Peter Krimmer
发明人： Roland Moller , Mario Gomez , Klaus Einmayr , Jens Hildebrad , Hans-Georg Erben , Hans-Peter Krimmer
IPC分类号： C07C253/00
CPC分类号： C07C253/22 , C07C253/34 , Y02P20/127 , C07C255/53
摘要： What is claimed is a process for preparing amino- or hydroxybenzonitriles, in which, in the course of an ammonolysis, the corresponding amino- or hydroxybenzoic acid compounds are reacted with ammonia in the presence of a supported catalyst comprising phosphate at temperatures between 250° C. and 500° C. The actual preparation step is performed in a reaction gas (mixture) and without involvement of an organic solvent, and is followed by an at least 2-stage purification step. In this purification step, the gaseous mixture obtained from the preparation step is first converted to an aqueous basic suspension and then the product present in the solid is released from this suspension. The main advantage of this combination process is that the starting materials are not esters, which is why the resulting products, in contrast to the processes which are otherwise customary, are free of the by-products which are otherwise customary, which leads to a high product purity. The process claimed can additionally be performed in an extremely economically viable manner, since the end product and the by-products are present in different states of matter in the suspension used and can therefore be separated easily from one another. In this way, solvent-free amino- or hydroxyl-containing benzonitriles are obtained in high yield and significantly improved product quality.
摘要翻译：所要求的是制备氨基或羟基苯腈的方法，其中在氨解过程中，相应的氨基或羟基苯甲酸化合物在含有磷酸盐的负载型催化剂存在下，与氨反应，温度在250℃ 和500℃。实际的制备步骤在反应气体（混合物）中进行，而不涉及有机溶剂，然后进行至少2阶段的纯化步骤。在该纯化步骤中，将从制备步骤获得的气体混合物首先转化为碱性悬浮液，然后将固体中存在的产物从该悬浮液中释放。这种组合方法的主要优点是起始原料不是酯类，这就是为什么所产生的产品与其他习惯方法相反的方法不同于其他习惯的副产物，这导致高产品纯度所要求的方法可另外以非常经济可行的方式进行，因为最终产物和副产物以所使用的悬浮液中物质的不同状态存在，因此可以彼此容易地分离。以这种方式，可以高产率获得无溶剂的含氨基或羟基的苯腈，并显着提高产品质量。

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