Showing papers in "Chemical Engineering Science in 1953"

TL;DR: In this article, the authors proposed a method to predict the distribution of residence-times in large systems using distribution-functions for residence times, which can be used to calculate the efficiencies of reactors and blenders.

TL;DR: In this paper, the application of sinusoidally varying concentrations is treated from a theoretical and experimental viewpoint, and experimental results are given for longitudinal diffusion in liquid flow through packed Raschig rings and for back-mixing of a liquid flowing over the packing of an absorption column.

TL;DR: In this paper, the effect of several variables on solid elimination efficiency of a 3.5 in. hydraulic cyclone was investigated, including feed diameter, overflow diameter, and throughput.

TL;DR: In this article, measurements have been carried on the rapidity of distribution of a small amount of liquid added to the contents of an agitated vessel and their mixing speeds under different conditions can be compared.

TL;DR: In this article, the presence of adsorbed molecules at the interface reduces the rate of mass transfer from drops which do not circulate and also retards internal circulation in circulating systems.

TL;DR: In this paper, the authors dealt with the preparation of phenol from cumene using liquid-phase oxidation of cumene with molecular oxygen, which produces cumene hydroperoxide, which is subsequently decomposed catalytically into phenol and acetone.

TL;DR: In this article, the porosity of polyvinyl chloride particles was measured by means of the electrical resistance between gauge pins, and a form of retransformed packing compressibility was found in which the first layers of cake do not compress gradually but only after a critical cake thickness has been reached.

TL;DR: In this article, the conditions of validity of simple forms of the Gibbs-Duhem equation most commonly used in practice are discussed and a simple derivation is given of the exact relationships valid at p constant (resp. T constant) in the case of a binary vapour-liquid system at equilibrium and connecting together either the fugacities of the components, or the activity coefficients of the component, or compositions of the vapour and liquid phase with T (resp p).

TL;DR: The theoretical concepts of complete and incomplete mixing have been discussed, and a definition for complete mixing has been proposed, using a statistical hypothesis as the test criterion as mentioned in this paper, which has been confirmed experimentally and it has been shown that, with random sampling, n, the number of particles in a sample, and x, the proportion of particles of type A in the sample, follow normal distributions.

TL;DR: In this paper, a graphical method is developed for designing absorption apparatus in which also chemical reactions occur, which enables one to determine the course of the driving force in the gas phase as a function of the composition of gas and liquid.

TL;DR: In this paper, the liquid-liquid equilibrium data for the system of ethyl acetate-acetic acid-water at 30°C, 40°C and 50°C were given.

TL;DR: In this article, temperature and humidity measurements of air in and above a drying fluidized mass of silica gel are given, and it is proved that perpendicular to the flow of air the temperature and the humidity show no gradient, being independent of the place in the apparatus, and that heat is transferred to the solid substance by the supporting sieves as well as by the air directly.

TL;DR: In this paper, the authors used the disc column designed by S tephens and M orris to study the rates of absorption of chlorine from air into solutions of 2-ethylhexene-1 in carbon tetrachloride.

TL;DR: In this article, the authors reviewed the accepted methods for the design of condensers to handle gas-vapour mixtures and described a single verticle tube condenser from which data were obtained for the systems chloroform and air, and steam and air.

TL;DR: In this article, a diffusion problem of spherical symmetry, involving gas flow, has been treated quantitatively, and the authors show that the diffusion problem is solvable by a convex convex function.

TL;DR: In this paper, the liquid-vapour relationship in two binary systems, with quite different boiling points, has been investigated and two different experimental methods have been necessary to get reliable results whose validity is checked by various criteria.

TL;DR: In this paper, liquid-liquid and vapour-liquid equilibrium data for the system ethyl acetate-acetic acid-water were given for 30, 40, 50, and 60°C.

TL;DR: In this paper, a graphical method is proposed for the accurate determination of the optimum volume ratio between the various compartments of a C.F.S.T.R., which is suitable for the experimental study of reaction kinetics in homogeneous systems; the steady conditions achieved in the reactor are connected directly to the laws of chemical change.

TL;DR: In this article, the S tephens -M orris disc column is used to study the influence of chemical reaction upon the rates of absorption of chlorine from air by solutions of either cyclohexene or oleic acid with iodine in carbon tetrachloride.

TL;DR: In this paper, a graphical representation of the free enthalpy of formation of n-thiols, n-alkenes and H 2 S, nalkanes and sulphur is given.

TL;DR: In this article, the equilibrium conditions of a system can be represented in two-dimensional diagrams, which show a strong resemblance to those used in the graphical calculation methods for distilling columns.

TL;DR: In this article, the porosity of graphite particles was analyzed to determine the rate of reaction and the B.E.T. area of the sample, and the complications which can happen according to the nature of porosity and its distribution between the particles were examined.

TL;DR: In this article, it was shown that the rate of addition of chlorine to 2-ethyl hexene-1 and to oleic acid in carbon tetrachloride was proportional to the second power of the chlorine concentration and independent of the concentration of cyclohexene.

TL;DR: In this paper, a 9 in. dia. perforated basket centrifuge was used for the analysis of heterogeneous cakes formed from layers of kieselguhr of high and starch and of chalk of low permeability.

TL;DR: In this article, it was shown that with the use of tungsten disulphide as a hydrogenation catalyst, 75% of the paraffin wax was converted into hydrocarbons boiling below 100°C.