bivalent cation

With the action of some bivalent cation, high temperature shift catalyst has been prepared by mixture precipitation method using open-hearth dust as a raw material.

利用钢铁厂平炉尘制备中温变换催化剂，制备成本低，工艺简单，活性达到部颁标准，具有明显的经济效益。

It is discussed for the effect of types of surfactants and concentrations, alkaline concentrations, salinity, polymer, crude oil fractions, bivalent cation, non-ionic surfactants on interfacial tensions.

探讨了表面活性剂种类和浓度、碱浓度、矿化度、聚合物、原油馏分、二价阳离子和非离子表面活性剂等对界面张力的影响。

In addition, the complex of quinolone and bivalent canon in seawater or brackish water was speculated not stable, quinolone can be released into media when diluted with water without bivalent cation.

此外，喹诺酮与二价阳离子的螯合产物可能并不稳定，当用无二价阳离子水稀释后药物可被重新释放。