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Volume 23 (1969 - 197･･･
- Issue 6 Pages 246-
- Issue 5 Pages 181-
- Issue 4 Pages 129-
- Issue 3 Pages 81-
- Issue 2 Pages 46-
- Issue 1 Pages 3-
Volume 23, Issue 3
Displaying 1-5 of 5 articles from this issue
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[in Japanese], [in Japanese]1969 Volume 23 Issue 3 Pages 81-97
Published: 1969
Released on J-STAGE: February 19, 2013
JOURNAL FREE ACCESSDownload PDF (37615K) -
Recovery of Potassium by the Metal Phosphate (Part 2)Hiroshi MATSUSHITA, Terumi TAKAGI1969 Volume 23 Issue 3 Pages 98-101
Published: 1969
Released on J-STAGE: February 19, 2013
JOURNAL FREE ACCESSThe authors studied a method of recovering potassium from brine, using MgHPO4·3H2O. For this purpose, the solution of NaCl and KCl mixed in various ratios was used to deterlnine the amount of absorbing potassium from this solution and the amount of eluding the potassium absorbed with acid.
1. The potassiuma bsorbed amounted to 80% and 60%, when potassium contents were 110mg and 338mg per 100ml in the mixed solution of potassium and sodium chloride, respectively. In this case, MgHPO4 dissolved slightly into the solution.
2. The absorption velocity of potassium was so rapid that the equilibrium of absorption was completed within about 15 to 30 minutes. And if the exchanger was immersed in hot alkaline solution (60°C) for a long time, the exchange capacity was decreased.
3. As the concentration of solution incresed, the value of mass distribution coefficient (KD=mequiv/g of exchanger÷mequiv/ml of solution at equilibrium) decreased.View full abstractDownload PDF (2755K) -
Recovery of Potassium by the Metal Phosphate (Part 3)Hiroshi MATSUSHITA, Terumi TAKAGI1969 Volume 23 Issue 3 Pages 102-106
Published: 1969
Released on J-STAGE: February 19, 2013
JOURNAL FREE ACCESSIn this paper, a study was conducted on the selective absorption method of potassium from sea water and brine by using zirconium phosphate as an exchanger. The selective absorption of potassium dissolved in sea water and brine was done with acid form zirconium phosphate.
1. The absorption rate of potassium differed according to the various molar ratios of PO4/Zr, and it was the most excellent one when the molar ratio was 2.5:1.
2. The absorption rates of 65%, 50% and 40% were respectively obtained by adding 8 gram zirconium phosphate to 100ml sea-water, 18gram zirconium phosphate to 100ml brine (8°B'e) and 20 gram zirconium phosphate to 100 ml brine (16°Be) produced by ion-exchange membrane method.
3. The values of selective absorption coefficient of potassium were calculated for several kinds of ions by acid form exchanger. When 1.6 gram exchanger was added to 100ml sea-water (8°B'e), the most excellent results were obtained. These values were:
SNaK=0.02, SMgK=0.002, and SCaK=0.03,
As the selective absorption of potassium can easily be done by this method without using alkali souce, this method may be used for recovering potassium from the brine produced by ion exchange membrane method or from the brine discharged from the flash evaporator of fresh water production.View full abstractDownload PDF (3316K) -
Studies on Desalting of Sea Water by Freezing MethodShigetake KAWASAKI1969 Volume 23 Issue 3 Pages 107-113
Published: 1969
Released on J-STAGE: February 19, 2013
JOURNAL FREE ACCESSExperiments on the displacement type washing in the beds packed with the solids of glass beads or crushed quartz were carried out. On the assumtion that the displacement type washing proceeds only within the saturation zone in the gravitatitationally drained bed, the author made an analyis on the residence time curve in the washing, using the mean residence time based on the volume of initial residual solution in the bed.
In general, most of the experimental data coincided with each of those residence time curves mainly characterized by the size of the packed solids. By using the modified equation of residence time curve, the apparent axial dispersion coefficient in the displacement type washing was estimated from the experimental curve.
As the result, the relation between Péclet number and Reynolds number was given in the range of Reynolds number from 10-2 to 101, as follows.
NPe=0.435(NRe)-0.075View full abstractDownload PDF (4836K) -
Studies on Natural Gas Brine (4)Kyunosuke MAJIMA, Mie TEJIMA, Shumpei OKA1969 Volume 23 Issue 3 Pages 113-117
Published: 1969
Released on J-STAGE: February 19, 2013
JOURNAL FREE ACCESSIn their previous papers (This Journal 14, 227 (1960), 15, 118 (1961), 18, 32 (1964)), the authors carried out a graphical calculation on the change of natural gas brine to be derived from the isothermal evaporation of the brine at 25°C, using the equilibrium diagram of the five components system NaCl-KCl-MgCl2-CaCl2-H2O.
To veryfy the above calculation, they conducted an experimental isothermal evaporation at 25°C of synthetic gas brine which was prepared equal to natural gas brine in components, and obtained fairly good results.
In the present paper, the authors studied the equilibrium values of the ternary system and quaternary system to obtain an equilibrium diagram of the five component system for the calculation of isothermal evaporation of natural gas brine at 50°C. The results obtained were as follows:
1. The isotherms for the ternary system MgCl2-CaCl2-H2O, NaCl-MgCl2-H2O and the quaternary system NaCl-MgCl2-CaCl2-H2O were determined at 50°C.
2. The samples of the solutions and solid phases were determined by chemical analysis. The composition of the solid phase was also identified by X-ray diffraction. Close investigation of the equilium value was made.View full abstractDownload PDF (3445K)
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