Corpus ID: 102210245

Improved technology of extracting free anthraquinones from Rheum

@inproceedings{Hon2002ImprovedTO,
  title={Improved technology of extracting free anthraquinones from Rheum},
  author={Chen Hon},
  year={2002}
}
  • Chen Hon
  • Published 2002
  • Chemistry
  • Objective:To improve the traditional technology of extracting free anthraquinones from Rheum for reducing the production cost and decreasing the harm on workers by chloroform.Methods:In the new technology,the Rheum was extracted at first with 95% alcohol,then the alcohol was removed and the extract was refluxed for 2.5 h in 20% sulfuric acid and chloroform.The chloroform was separated from sulfuric acid and was extracted successively with 2.5% sodium bicarbonate,5% sodium carbonate and 0.5… CONTINUE READING

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