Bulletin of the Society of Sea Water Science, Japan
Online ISSN : 2185-9213
Print ISSN : 0369-4550
ISSN-L : 0369-4550
Volume 29, Issue 6
Displaying 1-5 of 5 articles from this issue
  • Vapor-Liquid Equilibrium of Some Polluting Materials in Seawater (Part 3)
    Toshikatsu HAKUTA, Akira NEGISHI, Totaro GOTO
    1976 Volume 29 Issue 6 Pages 247-254
    Published: 1976
    Released on J-STAGE: February 19, 2013
    JOURNAL FREE ACCESS
    The vapor-liquid equilibria of volatile polluting materials in seawater are very important data for simulating their behaviors and the distribution in seawater distillation plants.
    In this work, the vapor-liquid equilibria of hydrogen nitrite, hydrogen cyanide, methyl alcohol, ethyl alcohol,n-and iso-propyl alcohols,n-and iso-butyl alcohols,iso-amyl alcohol, acetone, and alkyl benzene sulfonate (ABS) in water were measured under given conditions by using Othmer type of equilibrium distillation apparatus.
    It seems that hydrogen nitrite is not concentrated into product water at pH values higher than pH7 (the running pH condition of seawater distillation plants).
    Cyanide ion forms metallic complexes with some metallic ions in seawater. Therefore, hydrogen cyanide lower than 0.1ppm concentration does not seem to be evaporated.
    However, acetone and alcohols had high vapor-liquid equilibrium ratio, and they were concentrated in distilled water.
    ABS was not detected in the vapor phase of ABS-water system.
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  • Toshikatsu HAKUTA, Akira NEGISHI, Teiji OKUBO, Totaro GOTO
    1976 Volume 29 Issue 6 Pages 255-260
    Published: 1976
    Released on J-STAGE: February 19, 2013
    JOURNAL FREE ACCESS
    It is very important to investigate the behavior and the distribution of volatile polluting materials in seawater in an MSF desalination plant.
    In this work, the behavior of phenols (phenol,o-cresol and m-cresol) in a five-stage flash evaporator was examined, and the numerical model in order to simulate the behavior was constructed by using the vapor-liquid equilibrium data of phenols-water system and the material balance.
    The experimental result in the five-stage flash evaporator showed that phenols were concentrated into the distilled water in the following order:o-cresol>m-cresol>phenol.
    The result of the simulation by this model was coincident with the experimental values in the five-stage and 39-stage plants. If the vapor-liquid equilibrium of other volatile polluting materials in seawater is measured, their behaviors and the distribution in the MSF desalination plant could be simulated by this numerical model.
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  • Ichiro HAYANO, Totaro GOTO
    1976 Volume 29 Issue 6 Pages 261-270
    Published: 1976
    Released on J-STAGE: February 19, 2013
    JOURNAL FREE ACCESS
    In this paper, a study was conducted to examine the crystallizing temperature of NaOH·3.5H2O and the composition of the mother liquor in the NaOH-KOH-NaCl-KCl-H2O system, which was necessary for recovering potassium from the caustic solution containing chlorides by crystallizing NaOH·3.5H2O.
    The triple (saturating) point with NaOH·3.5H2O, NaCl, and KCl crystals was found to be 11.94°C where the mole ratio of sodium ion to the total positive ions and that of hydroxide ion to the total negative ions were 0.930 and 0.952, respectively. When the mole ratio of sodium ion was larger than 0.930, NaCl and NaOH·3, 5H2O were crystallized, but KCl and NaOH·3.5H2O when it was smaller than 0.930.
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  • Preparation of Potassium Sulphate from Bittern
    Minoru KADOTA
    1976 Volume 29 Issue 6 Pages 271-289
    Published: 1976
    Released on J-STAGE: February 19, 2013
    JOURNAL FREE ACCESS
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  • [in Japanese]
    1976 Volume 29 Issue 6 Pages 290-296
    Published: 1976
    Released on J-STAGE: February 19, 2013
    JOURNAL FREE ACCESS
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