Method for decoloring and purifying azoxystrobin
2014
The invention relates to a method for decoloring and purifying azoxystrobin. The method comprises the following steps: (1) completely dissolving a crude azoxystrobin product in ethyl acetate at a normal temperature, feeding activated carbon, stirring for 1-2 hours, filtering and keeping filtrate; and (2) adding n-hexane into the filtrate obtained in the step (1), stirring and crystallizing for more than 1.5 hours at 0-5 DEG C, filtering, and baking to obtain an azoxystrobin finished product. The method is performed at normal temperature or low temperature, has low energy consumption, and is convenient to operate; the yield is over 80 percent; the prepared azoxystrobin finished product is white, the content can be increased to over 99 percent, and the quality is high.
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