申请人:Evultis S.A.
公开号:EP2196450A1
公开(公告)日:2010-06-16
The present invention is directed to a process for producing pure Diacetylrhein (Diacerein), comprising the transformation of raw Diacerein or raw Rhein, into a water-soluble salt thereof, and then elimination of the impurities by passage through a hydrophobic resin: adsorption of the products, washing and then elution. After acidification of the pure salt of Diacerein or Rhein obtained after the passage through said hydrophobic resin, Diacerein is recovered and dried in a pure form.
The invention is also directed to pure Diacerein obtained by the process of the invention, in which the total content of impurities is between 0 and 100 ppm.
The invention is also directed to pure Diacerein obtained by the process of the invention, in which the Aloemodine content is less than 100 ppm
本发明涉及一种生产纯二乙酰二羟基大黄素(Diacerein)的方法,包括将原始的Diacerein或原始的Rhein转化为其水溶性盐,然后通过疏水树脂进行杂质的去除:吸附产物,洗涤,然后洗脱。在通过所述疏水树脂的纯Diacerein或Rhein盐酸化后,Diacerein以纯形式回收和干燥。本发明还涉及通过本发明的方法获得的纯Diacerein,其中杂质的总含量在0至100 ppm之间。本发明还涉及通过本发明的方法获得的纯Diacerein,其中Aloemodine含量小于100 ppm。