The results showed that the process was stable with high yield, product purity was high.
试验结果表明，工艺稳定，产品纯度高，收率高。
The purity of the product after rectifying process could reach to 99.8%.
反应产物经精馏分离后得到的产品纯度在99.8%以上。
This product has little impurity, high purity, fixed construction.
本产品具有杂质少，纯度高，结构稳定的特点。
According to the new condition of technology, the purity of product increase 1.33%.
结果显示，优化萃取工艺条件后，产品的纯度提高了1.33%。
The method is simple and high-efficient; and an obtained product has high purity.
本发明的方法简单高效，获 得的产品纯度高。
The product has high purity, standard hue and stable color.
产品纯度高，色调正，色泽稳定。
The present invention has the active effects of: high product yield and purity;
本发明具有如下的有益效果，一是本发明收率、纯度高，生产效益好；
The present invention has the active effects of: high product yield and purity;
本发明具有如下的有益效果，一是本发明收率、纯度高，生产效益好；
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