Development of continuous precipitation process with crystal forms controlled by ionic strength

虽然在工业中通常通过沉淀或结晶来生产细颗粒，但是仍然难以预测和控制所得颗粒的形状、尺寸分布和晶形。在这项研究中，连续沉淀草酸钙，表现出假多晶型。定量研究了反应物溶液的pH和离子强度的影响，并试图控制晶型。发现了草酸钙晶体生长过程中晶型的变化规律。

Although fine particles are commonly produced by precipitation or crystallization in the industry , it is still difficult to predict and control the shape, size distribution, and crystal form of the resulting particles. In this study , continuous precipitation of calcium oxalate which exhibits pseudopolymorphism was carried out. Effects of pH and ion strength of the reactant solution were investigated quantitatively and attempted to control the crystal form. How the crystal form of calcium oxalate changes during crystal growth was found.