Author
Masaaki Sekino
Bio: Masaaki Sekino is an academic researcher from Kyushu University. The author has contributed to research in topics: Viscosity & Reduced viscosity. The author has an hindex of 1, co-authored 1 publications receiving 16 citations.
Papers
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TL;DR: In this paper, the characteristics of a mixing apparatus with two agitator axes having multidisks as a high viscosity polymer finisher were studied from a practical point of view.
Abstract: The characteristics of a mixing apparatus with two agitator axes having multidisks as a high viscosity polymer finisher was studied from a practical point of view, 1) Holdup : it could be correlated by using a term of (μnD/δ). 2) Power consumption and mixing time : the results were compared with those of other high-viscosity equipment. 3) Residence time distribution and dead space : the former almost agreed with the tanks-inseries model. The latter seemed to be small. 4) Surface renewal action : the rate of surface renewal was determined from the gas absorption and also estimated by the observation of liquid flow. As a model reaction polycondensation polymerization of polyamide in the presence of water and viscosity stabilizer is discussed.
17 citations
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TL;DR: In this paper, the hydrodynamic, heat and mass transfer characteristics of mechanically agitated contactors have been critically reviewed and the mixing time (θmix) can be correlated well by a model based on circulation path and average circulation velocity.
222 citations
34 citations
TL;DR: In this paper, the current status on mathematical modelling of semibatch and continuous PET reactors is reviewed with clear indication of existing gaps, and the molecular weight distribution during PET formation and melt blending have also been considered.
29 citations
TL;DR: In this article, mass transfer characteristics for rotating disc contactor where a number of discs are mounted on a horizontal shaft and are partially submerged in a pool of liquid, are determined experimentally for Newtonian and non-Newtonian fluids.
28 citations
TL;DR: In this paper, a mathematical model of a continuous polycondensation reactor used in the finishing stages is developed, which predicts the directions in which mixing, and other process and operational variables, will influence the progress of poly condensation.
Abstract: A mathematical model of a continuous polycondensation reactor used in the finishing stages is developed. This axial dispersion model predicts the directions in which mixing, and other process and operational variables, will influence the progress of polycondensation. The available pilot plant data have been compared with the model predictions. In view of the neglect of the side reactions in our model, the comparison is only approximate but appears reasonable. The analysis developed is used to highlight certain critical design considerations.
25 citations