A sequential selective chemical degradation was performed for the kerogen from the Nenjiang Formation of the southern Songliao Basin by using a series of mild chemical degradations.
采用一系列温和的化学降解法对松辽盆地南部嫩江组烃源岩的干酪根进行连续的选择性化学降解，并对不同降解产物进行色谱—同位素比值质谱分析。
Using sequential selective flotation process and adding dextrin as main depressant obtain good separation result.
采用优先浮选工艺，糊精为主要抑制剂，获得了较好的分离指标。
The flowsheet of sequential selective-flotation is suitable for the recovery of molybdenum and zinc sulfides from the tailings of magnetic separations treating Makeng iron ore.
钼锌顺序优先浮选是回收马坑铁矿磁选尾矿中所含钼、锌硫化物的合适工艺流程。
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