The invention relates to a method for separating and preparing
tetrandrine and hanfangchin through
ion exchange and
column chromatography on
silica gel. Fourstamen
stephania root is dried root of a
menispermaceae stephania plant stephania tetrandra, an effective ingredient of the fourstamen stephania root is
sinomenine, main effective ingredients of
sinomenine are
tetrandrine and hanfangchin, and the
sinomenine has anti-
myocardial ischemia, anti-arrhythmia,
blood pressure lowering, anti-inflammatory, anti-
silicosis, anti-
cancer and
analgesic effects. When in
drug use, the purity requirement of the
tetrandrine and hanfangchin reaches more than 99%, and extraction and purification are important reasons limiting the
drug use of the tetrandrine and hanfangchin. At present, a technology for extracting and purifying the tetrandrine and hanfangchin applies massive toxic and expensive
chloroform and strong base, and the
chloroform has great toxic effect on human and the environment and is also strong corrosive on equipment for enlarged production; besides, sample purity is not high, and a technological process is complex. At the current situation, the invention develops a method for obtaining high-purity tetrandrine and hanfangchin through rapid separation and purification by applying
ion exchange resin and a C18 bonded
silica gel column chromatography and also discloses a method for recrystallizing and purifying the tetrandrine and hanfangchin by utilizing ethyl
alcohol. The method provided by the invention has the advantages that a preparation technology does not apply any toxic
reagent,
column chromatography filler can be recycled, and ethyl
alcohol can be recycled.