Inhibition of Surfactants on Agglomeration of Succinic Acid inCooling Crystallization
Chemical Engineering Research Center of the Ministry of Education for Advanced Use Technology of Shanbei Energy, Shaanxi Research Center of Engineering Technology for Clean Coal Conversion, School of Chemical Engineering, Northwest University, Xi’an 710069, China
Abstract：The agglomeration phenomenon of succinic acid in cooling crystallization was analyzed by FBRM (Focused Beam Reflectance Measurement) and PVM (Particle Video Microscope). It was found in the experiments with seeding and without seeding that both the coexistence of particles with different sizes and adhesion between particles were two factors in forming agglomeration. On this basis, surfactants, such as cetyltrimethylammonium bromide (CTAB), sodium dodecyl benzene sulfonate (SDBS) and Tween80 were added into the crystallization solution, respectively, and the effects of surfactants on the agglomeration of particles during crystallization were investigated. The change of crystal morphology showed that the selected surfactants could be adsorbed on the surface of the crystals and could greatly reduce the agglomeration. It could be deduced that the mechanical isolation due to surface adsorption could reduce the mutual bonding forces between the crystals and make the particles of the crystal products more uniform. This study demonstrated that the addition of surfactants can reduce the degree of agglomeration during crystallization.
Yu Qiushuo,Li Xiaorui,Qiao Xiaoyan et al. Inhibition of Surfactants on Agglomeration of Succinic Acid inCooling Crystallization[J]. 化学反应工程与工艺, 2017, 33(2): 187-192.
