The leaching process is controlled by mixed steps:the surface chemical reaction and the diffusion passing through the silicon and iron mineral phases.
浸出过程属于混合控制，即表面化学反应与通过不溶硅、铁矿物相的扩散为过程的控制步骤。
2
And the paper emphasized on the interface reaction mechanism, diffusion mechanism and metallic phase transformation mechanism which is controlled by activation.
重点介绍了以界面反应为主、扩散为主的反应机理和活度控制的金属相变机理。
3
For isomerization of o-xylene the improvement in para-selectivity has not been observed, because the reaction is not mainly controlled by the diffusion of the reaction products.