The bubble point curves of homogeneous binary systems cold be expressed by the following empirical equation which was the function of only liquid composition:
In ideal solutions, the bubble points could be expressed by the following equation:
in which Srz and Sv were calculated from vapor pressure. And representation for linearity of bubble point curve for homogeneous binary systems was shown . By uaipg the equation for bubble point curve, the slope of the curve at infin:te dilutions were evaluated without. xtrapolation so that it was easy to evaluate the activity coefficieateat infinite dilutions.

View full abstract

Study of coalescence of liquid droplets in a liquid-liquid system was conducted by use of a batch type of stirred tank. As the three kinds of liquid forming the continuous phase, the lighter dispersed phase and the heavier dispersed phase were adopted the water purified by ion-exchange resins, the pure benzene and the 2:1 mixture of benzene and carbon tetrachloride, respectively. After the completion of agitation, the composition of both the lighter dispersedmedium floating off on the surface of the continuousphase liqid and that of the heavier dispersed mediumgoing down to the bottom of the tank were determinedby means of liquid-density measurements. Thecoalescence fraction evaluated using these deta was analyzedon the basis of a theoretical treatment very similar tothe usual chemical reaction kinetics. Owing to this treatmentthe meaning of coalescence could be made more definitethan before. Moreover, from the relatively goodaccordance between theory and experiments the assumedmodel of coalescence mechanism was suggested to be reasonableto a deep extent.

View full abstract

To improve the performance of multi-stage gas-bubble columns with perforated plates, on-off pulsating motion is superposed on the feed gas stream, and flow and mass transfer behaviours are measured for the columns. By the superposition of pulsating motion, the range of stable operation is increased, and gas bubbles are broken up into smaller ones, both without losing the advantages of usual multistaged gas bubble columns. Licuid phase mass transfer coefficient k_La is also improved for the desor ption of carbon dioxide from water by air stream.

View full abstract

The effects of submergence in liquid on flame stability was investigated by using the step-type burner as the submerged burner. This is a very important matter in the design of submerged combustion equipment. As a result the following conclusions were obtained: the depth of step was a main factor in the flame stability of this kind of burner and the unsteady oscillation combustion was intense in rich flame.

View full abstract

The authors have proposed Egs.(16), (17) and (18) as the basic relations between net work input to crushing in the Hardgrove machine A_rz, ΣA_rz, specific surface increase ΔS_z, and total number of revolutions Z, and then confirmed that these relations are in fairly good agreement with the corresponding experimental results.
(16)ΔSz=CEI·ΣArs/W₀
Ars=Arl e^-(z-1)/z(17)
ΣArs·Arl e^-(z-1)/z(18)

View full abstract

The authors have proposed the fundamental relations among the drop-weight type impact compressive crushing condition (drop weight, drop height and number of blows), the material condition (size, mass, true density, modulus of longitudinal elasticity and crushing extensin index), the net work input to crushing, the specific surface increase and the size distribution of crushed products. A close similarity was found between these relations and the corresponding experimental results.

View full abstract

The authors have presented the fundamental relations among the crushing condition of the ball mill rotating at 70 per cent of the critical speed (mill diameter, mill length. ball diameter, ball density, number of balls and total number of revolutions), the material condition (size, mass, true density modulus of longitudinal elasticity and crushing extension index), the net work input to crushing, the specific surface increase and the size distribution of crushed products. The authors have confirmed that these relations are in fairly good agreement with the corresponding experimental results.

View full abstract

Study of coalescence of liquid droplets in a liquid-liquid system was conducted by use of a batch type of stirred tank. As the three kinds of liquid forming the continuous phase, the lighter dispersed phase and the heavier dispersed phase were adopted the water purified by ion-exchange resins, the pure benzene and the 2: 1 mixture of benzene and carbon tetrachloride, respectively. After the completion of agitation, the composition of both the lighter dispersed medium floating off on the surface of the continuous phase liqid and that of the heavier dispersed medium going down to the bottom of the tank were determined by means of liquid-density measurements. The coalescence fraction evaluated using these deta was analyzed on the basis of a theoretical treatment very similar to the usual chemical reaction kinetics. Owing to this treatment the meaning of coalescence could be made more definite than before. Moreover, from the relatively good accordance between theory and experiments the assumed model of coalescence mechanism was suggested to be reasonable to a deep extent.

View full abstract

In the optimal division problem for a discrete system of N stages, a conversion formula for a system in which process equation has some special form and satisfies some conditions was derived, and a few example were shown through the flow chart of this method of solution.
The proposed method of solution is not to be compared with Katz's algorithm, but gives a clue for the propose of this investigation to research the equi-division condition in a form of matrix and vector representation of the optimal division problem.

View full abstract

This study deals with an experiment of mass transfer at high mass fluxes. The measurements of the sublimation rate of d-camphor from the surface of the cylindrical element into a high temperature air stream through a laminar boundary layer are made in the range of Reynolds number:(0.7.-6.0)×10⁴and transfer number: 0-0.88. The experimental results indicate that the effect of the transfer number on the mass transfer agree well with the theoretical results of the approximate analysis by von Schuh.

View full abstract