The conventional method for refining the crude ester was substituted by the technique of reactive distillation to make edible grade product.
对粗酯的精制改变传统的方法，采用反应精馏精制以制取食品级产品。
The conventional method for refining the crude ester was substituted by the technique of reactive distillation to make edible grade product.
对粗酯的精制改变传统的方法，采用反应精馏精制以制取食品级产品。
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