Mechanically agitated gas-liquid reactors

Design Parameters for Mechanically Agitated Reactors

Polyethylene terephthalate—II. Engineering analysis

Gas absorption into non-newtonian fluids in rotating disc contactors

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.

Modeling of poly(ethylene terephthalate) reactors: 6. A continuous process for final stages of polycondensation

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.

Shigeru Kakimoto

Papers

On a high viscosity polymer finisher apparatus with two agitator axes having multidisks