Longitudinal Dispersion in Packed Extraction Columns with and Without Pulsation PDF Download

Author: Joon S. Moon
Publisher:
ISBN:
Category : Mechanical engineering
Languages : en
Pages : 119

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Author: Joon Sang Moon
Publisher:
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Category : Extraction (Chemistry)
Languages : en
Pages : 134

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Author: Alphonse Hennico
Publisher:
ISBN:
Category : Axial flow
Languages : en
Pages : 204

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Author: Gabriel L. Jacques
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Category : Chemical engineering
Languages : en
Pages : 76

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Author: Gabriel L. Jacques
Publisher:
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Category : Diffusion in hydrology
Languages : en
Pages : 156

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ISBN:
Category : Aeronautics
Languages : en
Pages : 642

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Lists citations with abstracts for aerospace related reports obtained from world wide sources and announces documents that have recently been entered into the NASA Scientific and Technical Information Database.

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Category : Nuclear energy
Languages : en
Pages : 814

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Author: Terukatsu Miyauchi
Publisher:
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Category : Dispersion
Languages : en
Pages : 112

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Author: C. Hanson
Publisher: Elsevier
ISBN: 1483151662
Category : Science
Languages : en
Pages : 601

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Recent Advances in Liquid-liquid Extraction focuses on the applications of liquid extraction. The selection first discusses solvent extraction. Concerns include organic and inorganic separations, mass transfer process, solvent extraction economics, and coalescence in liquid-liquid systems. The book focuses on the chemistry of solvent extraction. Extraction by acidic organophosphorus compounds; extraction by phosphorus-bonded oxygen-donor solvents; extraction by high-molecular weight amines; and synergistic extraction are elaborated. The book also focuses on industrial organic processes; industrial contacting equipment; response characteristics and control of extraction processes; and calculation of contactors with longitudinal mixing. The selection presents the study of longitudinal mixing in liquid-liquid contactors. Rotating disc contactors, packed columns, vibrating plate extractors, and Oldshue-Rushton columns are described. The text also discusses heat transfer by direct liquid-liquid contact and the coalescence of liquid droplets and liquid dispersion. The selection is a vital source of data for readers interested in liquid extraction.

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Category :
Languages : en
Pages :

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Dispersion phenomena in packed beds in both axial and radial directions were studied to provide basic data for extraction-tower design. Nine different beds were used, involving regular and random arrangements of spheres, and random arrangements of Raschig rings and Intalox saddles. For one-phase flow a wide range of Reynolds numbers was used (5 to 2000), covering regions of laminar, transition, and turbulent flow. For the axial Peclet number, different constant values were found in the turbulent range and in the laminar range. The existence of a fairly sharp transition region was observed. Radial-dispersion results showed similar behavior. The axial Peclet number was found to vary inversely with bed porosity, while the radial Peclet number was almost proportional to porosity. For two-phase fiow, measurements were made up to the flooding point, which occurred at Reynolds numbers near 100. The axial Peclet number for both continuous and discontinuous phases is a function of the Reynolds numbers for the two individual phases. For each phase, the laminar value of the axial Peclet number obtained for one-phase flow is an upper limit. Values as low one- fifth of this limiting value were found at relatively large flow rates of the second phase. The radial Peclet number was measured only for the continuous phase of two-phase systems; it was found to decrease in the same direction, but by a smaller percentage. (auth).