FIELD: chemistry.
SUBSTANCE: invention refers to advanced process of diacerein production with aloe-emodin and it mono-, di - and triacetylate derivatives within 0 to 5 parts per million containing water-organic solution of weak-base diacerein salt is extracted with solvent miscible or practically immiscible with water. Method allows for product containing diacerein and up to 5 parts per million of aloe-emodin, i.e. enables product with low aloe-emodin content, and is characterised with simplicity of implementation.
EFFECT: product with low aloe-emodin content and simplicity of implementation.
10 cl, 6 ex
