Is a
Patent attributes
Patent Jurisdiction
Patent Number
Patent Inventor Names
Stefano Carlino0
Guido Di Napoli0
Date of Patent
November 18, 2008
0Patent Application Number
116670870
Date Filed
November 11, 2005
0Patent Primary Examiner
Patent abstract
A process for preparing aloe-emodin from aloin by oxidizing aloin by treatment with an oxygen-containing gas in the presence of an acid. The aloe-emodin may be used for the production of rhein and diacerein by oxidizing aloe-emodin by treatment with a chromium-free oxidizing medium to obtain rhein and purifying the rhein obtained. The rhein may be acetylated to obtain diacerein.
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