为提高防老剂BHT的纯度，采用重结晶和区域熔融法对工业品防老剂BHT进行提纯。
In order to improve the purity of industrial product, Antioxidant BHT was purified by the methods of recrystalize and zone melting.
为提高防老剂BHT的纯度，采用重结晶和区域熔融法对工业品防老剂BHT进行提纯。
In order to improve the purity of industrial product, Antioxidant BHT was purified by the methods of recrystalize and zone melting.
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