| 摘要 |
Process for purification of technical grade pentachlorophenol by immersing the pentachlorophenol in an aqueous alkaline solution or suspension, separating an insoluble portion from the resultant mixture, dissolving the insoluble portion in an aqueous alkaline solution, treating the solution with active charcoal, removing the active charcoal, adding copper sulfate to the solution, removing the deposit which forms from the solution, and recovering pentachlorophenol from the solution. Alternatively, the steps of treatment with active charcoal and addition of copper sulfate can be reversed.
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