The prior method uses an organic solvent with higher boiling point and larger polarity, so unit consumption and energy consumption of raw materials are increased and heavy odor is caused;
现有方法使用了沸点较高、极 性较大的有机溶剂，不仅原料单耗与能耗增大，而且气味重；
The prior method uses an organic solvent with higher boiling point and larger polarity, so unit consumption and energy consumption of raw materials are increased and heavy odor is caused;
现有方法使用了沸点较高、极 性较大的有机溶剂，不仅原料单耗与能耗增大，而且气味重；
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