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1. 发明授权

US06288282B1 Process for preparing ionones 失效
标题翻译：紫罗兰酮的制备方法
公开(公告)号：US06288282B1
公开(公告)日：2001-09-11
申请号：US09567268
申请日：2000-05-09
申请人： Udo Rheude , Ulrich Hörcher , Dietmar Weller , Manfred Stroezel
发明人： Udo Rheude , Ulrich Hörcher , Dietmar Weller , Manfred Stroezel
IPC分类号： C07C4921
CPC分类号： C07C403/16 , C07C2601/16
摘要： Process for the continuous preparation of &agr;- and/or &bgr;-ionone or homologous compounds using concentrated sulfuric acid at temperatures from 20 to 90° C., in the presence of organic solvents or diluents with cooling and by subsequent termination of the reaction by hydrolysis of the reaction mixture with water or dilute sulfuric acid, wherein both the cyclization of pseudoionones and the subsequent hydrolysis of the reaction mixture are carried out in a virtually adiabatic reaction in one or more reaction mixing pump(s) which are connected in series and each of which consists essentially of a rotationally symmetrical mixing chamber formed from a peripheral wall and two end walls and of a mixing rotor made of material inert to sulfuric acid and with rotational drive, where the mixing chamber has at least one inlet opening for each component and one outlet opening for the reaction mixture, and annular channels in fluid connection to one another in the end walls, and wherein the heat of the two reactions is in each case partly or wholly removed with the aid of a downstream heat exchanger.
摘要翻译：使用浓硫酸在20〜90℃的温度下，在有机溶剂或稀释剂存在下，在冷却下，随后通过水解终止反应，连续制备α-和/或β-紫罗兰酮或同系化合物的方法反应混合物与水或稀硫酸反应，其中假戊烯酮的环化和随后的反应混合物的水解在一个或多个反应混合泵中实质上绝热的反应中进行，所述反应混合泵串联连接，其基本上由旋转对称的混合室组成，该混合室由周壁和两个端壁以及由硫酸惰性且具有旋转驱动的材料制成的混合转子，其中混合室具有用于每个部件的至少一个入口，用于反应混合物的一个出口，以及在端壁中彼此流体连接的环形通道，其中热量在每种情况下，两个反应在下游热交换器的帮助下部分或全部去除。

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