Bulletin of the Society of Sea Water Science, Japan
Online ISSN : 2185-9213
Print ISSN : 0369-4550
ISSN-L : 0369-4550
Search
Advanced search
OR
Browse
Search
Volume 22, Issue 3
Displaying 1-3 of 3 articles from this issue
Show all abstracts
    • |<
    • <
    • 1
    • >
    • >|
  • [title in Japanese]
    [in Japanese]
    1968 Volume 22 Issue 3 Pages 243-256
    Published: 1968
    Released on J-STAGE: February 19, 2013
    DOIhttps://doi.org/10.11457/swsj1965.22.243
    JOURNAL FREE ACCESS
    Download PDF (21200K)
  • Crystal Growth in Indirect Contact Systems
    Concentration of Sea Water and Brine by the Gas Hydrate Process (15)
    Susumu SAITO
    1968 Volume 22 Issue 3 Pages 257-271
    Published: 1968
    Released on J-STAGE: February 19, 2013
    DOIhttps://doi.org/10.11457/swsj1965.22.257
    JOURNAL FREE ACCESS
    Show abstractHide abstract
    As part of his experiments on hydrate crystallization, the author conducted a study on indirect contact systems in which the heat of formation was removed through metallic surface, and obtained the following results:
    1. Except propane, every hydrate tested grew easily, but the growth rate was affected by species of hydrating agents. The order of these growth rates was R-21>R-22> R-12> propane, consisting with the order of solubilities of hydrating agents in water. Effect by temperature was not remarkable.
    2. Basing upon the temperatures and pressures previously reported in connection with hydrate formation and the growth rate obtained from the present experiment, the author selected R-21 as the most profitable hydrating agent.
    3. The velocity of hydrate growth was expressed by the first order function of hydrating agent concentration in liquid phase. The velocity constant is greatly affected by stirring strength.
    4. Metastable area of the growth was between epuilibrium line and about 100 mmHg above the line.
    View full abstract
    Download PDF (30298K)
  • Analysis of Sulfate Ion in Oceanic Salts
    Tsutomu EGAWA
    1968 Volume 22 Issue 3 Pages 272-285
    Published: 1968
    Released on J-STAGE: February 19, 2013
    DOIhttps://doi.org/10.11457/swsj1965.22.272
    JOURNAL FREE ACCESS
    Show abstractHide abstract
    For the determination of SO42- contained in oceanic salts, the author investigated a rapid analytical method of chelatometric titration, gravimetric method and others to make some improvements and obtained the following results:
    1. In general, the chelatometric titration of Ba2+ in the presence of barium sulfate tends to bring about a negative error. Therefore, the author investigated to avoid this error by addition of ethyl or methyl alcohol and equivalent quantity to Ba2+. As the result, a visible change in color at the end point was observed by addition of alcohol to the sample solution, and the change of EBT-indicator was clearly observed in the presence of Mg2+ of more than 0.7 equivalent quantity to Ba2+. It was found undesirable to apply this method as it was to the magnesiumio n containinmg ore than 20 equivalenqtu antityt o SO42- such as the brine produced by ion-exchange membrane method.
    2. The author used Ba-EDTA to investigate a simple method of determining sodium sulfate and magnesium chloride contained in common salt.
    3. The direct precipitation analysis method of SO42- was improved by using the rhodizonic acid paper test.
    4. Taking advantage of the fine grain precipitation obtained by the reaction of Ba-EDTA, the uthor determined the micro SO42- by turbidimetric analysis. This method gave satisfactorya results to the determination of micro SO42-.
    View full abstract
    Download PDF (28913K)
    • |<
    • <
    • 1
    • >
    • >|
feedback
 Top