ISSN:0008-4034    

DOI:10.1002/cjce.5450370302

出版商:Wiley Subscription Services, Inc., A Wiley Company    

年代:1959

数据来源: WILEY

摘要:

AbstractTo record the velocity history of a particle in complex problems of solid‐gas flow with greater accuracy than is possible with existing methods, a technique was developed which in essence consists of following the flight of the particle under test—which has been previously tagged with a suitable gamma‐emitting nuclide—by means of Geiger probes placed at predetermined points along the outside surface of the duct or reactor and parallel to its axis. Sharp timing pulses are thus obtained on the screen of a cathode‐ray oscilloscope, which permit the estimation of the time elapsed between probe stations to less than 1/1000 second. Complete description of the electronic aspects of the method is given, and details of the particle preparation are outlined.A brief description is given of the application of the method to the determination of the rate of mass and heat transfer from particles in accelerated motion in a turbulent co‐current gas stream and to the study of the effects of the turbulent flow parameters on the drag coefficients of particles in highly turbu

ISSN:0008-4034    

DOI:10.1002/cjce.5450370303

出版商:Wiley Subscription Services, Inc., A Wiley Company    

年代:1959

数据来源: WILEY

摘要:

AbstractA mixer‐settler for continuous countercurrent solvent extraction is described in which the mixing and pumping of the liquid phases are achieved by air streams.The operating principles of this mixer‐settler are presented in theory and confirmed by experiment. Measurements include interface heights, capacity, air requirements and entrainment of aqueous phase in the solvent under various operating conditions.The main advantages claimed for this unit are.1) Mechanical simplicity and consequent freedom from maintenance.2) Pumps and interface controllers are not required between individual stages.3) Compactness for a given separation.4) Low energy requireme

ISSN:0008-4034    

DOI:10.1002/cjce.5450370304

出版商:Wiley Subscription Services, Inc., A Wiley Company    

年代:1959

数据来源: WILEY

摘要:

AbstractModels are defined for various mixing conditions, in continuous flow systems. Differential equations are derived which take into account an effective volume of mixing, possible short‐circuiting, hold‐up time of the system, partial displacement or piston flow.The values of the different factors contained in the integrated equations can he determined experimentally by the particular response of a given system to a sudden change in composition of the feed.A correlation of the effective volume of mixing and the agitator r.p.m. is presented.A design procedure is suggested for tank flow reactors when partial mixing occ

ISSN:0008-4034    

DOI:10.1002/cjce.5450370305

出版商:Wiley Subscription Services, Inc., A Wiley Company    

年代:1959

数据来源: WILEY

摘要:

AbstractBatch shake‐out tests on two tertiary amines and one secondary amine to determine the effects of sodium sulphate concentration and pH on the distribution of uranium between 0.1N amine in kerosene and aqueous sodium sulphate solution showed that transfer of uranium from the solvent to the aqueous phase was favored by increasing pH values up to 5.5 and by increasing the aqueous sodium sulphate concentration up to 20% w/v Na2SO4.Continuous counter‐current stripping of tri‐isooctylamine (TIOA) extracts with 20% w/v Na2SO4was also carried out in a three‐stage mixer‐settler arrangement in which the pH was controlled by the addition of 10% NaOH to the three stages. Further addition of caustic to the separated aqueous strip solution to raise the pH to 7.0–7.2 yielded a high grade uranium precipitate (88% U3O8). The continuous testing confirmed the results of the shake‐out tests and showed that the procedure gave results comparing favorably with other stripping methods accompanied by a lower overall

ISSN:0008-4034    

DOI:10.1002/cjce.5450370306

出版商:Wiley Subscription Services, Inc., A Wiley Company    

年代:1959

数据来源: WILEY

摘要:

AbstractGraphical and numerical integration methods are proposed for testing the thermodynamic consistency of ternary vapor‐liquid equilibrium data, in which the integration of the Gibbs‐Duhem equation can be performed under isothermal and isobaric conditions. No data‐fitting procedure is involved in the proposed methods, therefore the uncertainty as to whether the deviations are due to experimental errors or to the inadequacy of the employed equation can be avoided. When one part of the data is less precise than the others, the proposed method may be employed to detect the inconsistent

ISSN:0008-4034    

DOI:10.1002/cjce.5450370307

出版商:Wiley Subscription Services, Inc., A Wiley Company    

年代:1959

数据来源: WILEY

摘要:

AbstractThe integral latent heats of vaporization of formic acid‐water mixtures at 760 mm. Hg. are reported and used to prepare an enthalpy‐concentration chart for the system. The data provided a basis for the estimation of the heats of mixing in the vapor phase, and the results indicate that the exothermic heat of mixing may be attributed to the partial dimerization of monomeric formic acid coupled with the association of water and acid molecules.Vapor‐liquid equilibria data for the system are also rep

ISSN:0008-4034    

DOI:10.1002/cjce.5450370308

出版商:Wiley Subscription Services, Inc., A Wiley Company    

年代:1959

数据来源: WILEY

ISSN:0008-4034    

DOI:10.1002/cjce.5450370309

出版商:Wiley Subscription Services, Inc., A Wiley Company    

年代:1959

数据来源: WILEY

ISSN:0008-4034    

DOI:10.1002/cjce.5450370310

出版商:Wiley Subscription Services, Inc., A Wiley Company    

年代:1959

数据来源: WILEY

ISSN:0008-4034    

DOI:10.1002/cjce.5450370301

出版商:Wiley Subscription Services, Inc., A Wiley Company    

年代:1959

数据来源: WILEY