The chemical absorption of ethylene into aqueous aceticacid containing mercuric was carried out using a continuous stirred a known interfacial area, in which stationary absorption is realized. Baud on film theory, it was concluded that ethylene hardlyre-acted with ric acetate within the liquid film when rotational speed N_p is higher than 150r.p.m. and modified reaction factor β* is less than 1. The data which satisfy the above conditions were employed to analyse the reaction rate.
A net reaction factor ψ was proposed to discuss the dependence of overall reaction rate on operating variables of a continuous flow reactor, and the relation between ψ and k_L* aτ_L (dimensionless operating variable) calculated from the present data was obtained.

View full abstract

To clarify the characteristics of is gaseous fluidised-bed reactor, a mathematical model based on the behaviour of bubbles has been developed in this work.
Comparisons of fractional conversions calculated with those observed have been conducted by using experimental results obtained by other investigators, and it has been found that the extent of catalytic reaction in a fluidized bed can be predicted satisfactorily from operating conditions with the aid of this model.
On the basis of numerical results. it has been concluded that most reaction proceeds in the neighbourhood of the bottom of the bed, and that the fractional conversions are greatly affected by bubble-size distributions.

View full abstract

Theoretical treatment of the characteristics of non-catalytic reaction in a gaseous fluidized bed is made with emphasis on the effect of the behaviour of bubble by using the density-distribution function of the fractional reaction of solid particles, and a mathematical model for calculating the extent of reaction of solids is developed.
Comparisons of experimental results on the reduction of hematite particles obtained by other investigators with the numerical ones predicted front this model show favorable agreement. It is found that the greater Part of reaction proceeds in the vicinity of the bottom of the fluidized bed, and that the fractional reaction of solids is greatly affected by the bubble-size distribution in the bed.

View full abstract

The response curves of the sideways light scattering aerosol particle counter have been obtained with various optical lens systems The response to be expected front spherical isotropic particles of various sizes and various real refractive indexes have been calculated from Mile theory and Hodkinson's quation, taking account of the spectrum characteristics of the light source and the phototube.
The influence of optical lens geometry on the Properties of the counter is discussed, and the 60° counter is recommended as a sideways scattering counter.

View full abstract

Experimental studies of transverse mixing in turbulent film flow on an inclined flat plate were made by injection of a stationary tracer liquid. It was confirmed that the transverse dispersion coefficient in the early stage of the mixing process is proportional to the product of mean velocity of fluid and modified coordinate of the main flow direction and that the proportional coefficient, which is theoretically equal to the square of apparent turbulent intensity, is a function of the Reynolds number only. The experimental results were sufficiently explained by using the Lagrangian correlation function for short diffusion times and the concept of the Reynolds flux based on scrubbing action.

View full abstract

Experiments on longitudinal mixing characteristics of liquid-liquid spray column were carried out by the rectangular pulse response method using 0.2N KCl solution as tracer, changing the orifice numbers and sizes of the distributor. Water and toluene were selected for continuous and dispersed phase, respectively. The dispersion model was found to express well the longitudinal mixing of the continuous phase. The dispersion coefficient E was correlated as a function of orifice diameter and slip velocity between dispersed and continuous phase.

View full abstract

Measurements of interaction rates of dispersed phase in a batch stirred tank were carried out by measuring the rate of spreading of a dye soluble only in the dispersed phase. Various organic phase dispersion in water was studied, and the results were correlated with some experimental variables.
The physical method mentioned above was modified to be accompanied with chemical reaction. A reactant was added to the tank where another reactant had been dispersed, and the two reactants began to disappear in accordance with the 2nd order rate law. The reaction conversions were measured between two reactants, K₄ [Fe-(CN) ₆] and K₂S₂O₈. The reaction conversions with some finite interaction rates were calculated by a digital computer simulation method. The interaction rates measured directly by a physical method are compared with those evaluated by a chemical reaction, and some problems and limitations on the studies are also discussed.

View full abstract

Mutual solubility curve and tie-lines were determined for the system acetic acid+water+trichloroethylene at 25°.
The acid concentration at plait point was obtained from extrapolation of the following correlation line, log x_w:(y_w-x_w)/x_w
where x_w is acid concentration (wt%) in organic phase and y_w is acid concentration (wt%) in water phase.
The equilibrium concentration ratio of the acid y_w/x_w is always larger than unity for all concentration ranges.

View full abstract