COD removal rate of the wastewater has not been reduced after 10time reuse of the extractingagent.
萃取后的络合相经碱解分离即可回收萃取剂,萃取剂循环使用10次,废水的COD去除率无下降趋势。
2
Dichloromethane was used as extractingagent for the extraction, and then vacuum rotatory evaporator was used for the concentration.
以二氯甲烷为萃取剂对茅台迎宾酒中的微量成分进行了萃取,然后用真空旋转蒸发器将其浓缩。
3
Moreover, the condition of extraction about many factors, for example, the effect of extractingagent, temperature, time, pH valve and species were studied in th…