日本海水学会誌

水酸化第二鉄に吸着するホウ素の脱離液よりイオン交換樹脂によるホウ素の分離について

苦汁よりホウ素の分離採取の研究 (第4報)

村上敏治, 石原良雄

1967 年 21 巻 1 号 p. 2-6
発行日: 1967年
公開日: 2013/02/19

DOIhttps://doi.org/10.11457/swsj1965.21.2

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In our previous report, a study was made on the extraction of boron adsorbed inferric hydroxide by using the solution of sodium hydroxide or hydrochloric acid.
In this report, an investigation was conducted on the separation of boron in the extracted solutions by means of the bathwise operation of ion exchange.
The mixture of a cation exchanger, Amberlite IR-120 and an anion exchanger, Amberlite IR-45 was used for the removal of ions excluding boron. After the filtration, a proper quantity of a strong base anion exchanger, Amberlite IRA-400 was applied for the adsorption of boron and traces of other anions.
The recovery of boron to the strong base anion exchanger was found to be about 92%.

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にがり中のリチウムの濃縮について

村上敏治, 上杉勝弥

1967 年 21 巻 1 号 p. 7-11
発行日: 1967年
公開日: 2013/02/19

DOIhttps://doi.org/10.11457/swsj1965.21.7

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In our previous report, lithium contained in both sea water and bittern was determined, thereby having confirmed that the lithium contained in sea water was almost concentrated into bittern.
In this study, the content of lithium in the concentrated bittern samples was estimated to be 10.8-12.1mg/l, while the lithium contained in the mother liquor of basic magnesium carbonate manufactured from bittern by sodium carbonate method was estimated to be 1.84mg/l.
The mother liquor of basic magnesium carbonate was evaporated at 75-80°C under the condition of pH6 until the most portion of byproduced salt was precipited. Using the components of the filtrate as reference, artificially concentrated solution was prepared for the purpose of the continuous evaporation.
One of these continuous evaporations was conducted after the removal of magnesium as magnesium hydroxide. As the result, the over-all recovery of lithium from the mother liquor was 68.2%, and lithium content in the last remaining solution (Table 8) amounted to 95mg/l.

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シユリーレンーダイヤゴナル法の, イオン交換膜をもちいる電気透析における境膜の研究への応用

武本長昭

1967 年 21 巻 1 号 p. 11-14
発行日: 1967年
公開日: 2013/02/19

DOIhttps://doi.org/10.11457/swsj1965.21.11

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電気泳動ならびに拡散の研究にもちいられているシユリーレンーダイヤゴナル法を, イオン交換膜電気透析における境膜の研究に応用した. 境膜は, 中性攪乱や選択透過性, スケール析出などに密接な関連があり, 電気透析法の重要な問題である. 光学装置は, 電気透析系に適合するように, 第1スリットおよび円柱レンズの部分を改良した. 透析セルは, 境膜全体を光が通過して測定を行ない得るようにするため, イオン交換膜面を露出させるように工夫した. この装置による写真には, 濃縮室膜面における境膜の発生が明瞭に現われており, さらに電流逆転の際に, 濃厚な層の膜面側に稀薄な層が発生することを示している.

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カリウムイオンとカルシウムイオンの分離

武本長昭, 橋本寿夫, 島田民子

1967 年 21 巻 1 号 p. 15-22
発行日: 1967年
公開日: 2013/02/19

DOIhttps://doi.org/10.11457/swsj1965.21.15

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“Calcium chloride solution” is produced from bittern, by adding CaCl₂and Ca(OH)₂solution to bittern and separating gypsum and magnesium hydroxide, respectively. It is about 16% in concentration and contains about 1/10 (equivalent ratio) of potassium ion. Separation and concentration of potassium ion from “calcium chloride solution” by electrodialysis with ion exchange membranes was examined. Selective permeability of calcium- to potassium-ion (T^Ca_K) in such a solution with high grade of concentration and special chemical composition as “calcium chloride solution” was determined at various conditions.
Potassium ion shows usually preferential permeability to calcium ion in cation exchange membrane. T^Ca_Kwas determined to be about 0.33 for ordinary membrane and to be about 0.07 for permselective membrane on univalent ions at the optimum condition; current density 1.0A/dm²and temperature 25°C. For both sorts of membrane, values of T^Ca_Kbecome greater by increasing current density and by both elevating and descending temperature.
Compositions of desalted and concentrated solutions were determinedfor several degrees of concentration by calculation and experiment. Calculations were made assuming selective permeability mentioned above to be 0.1. Experiments were carried out with an equiprment having 9cm²of effective membrane area. Experimental values were appreciably different from calculated ones, owing chiefly to superior permselectivity of membranes and the migration of water accompanying electrodialysis.
Degree of desalting affected on the change of composition of solutions rather seriously. Potassium ion content in concentrated solution was smaller when degree of desalting was greater. Flow rate of the solution in desalting compartments might also affect on the composition of solutions.

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食塩中の鉄分の除去

磁気選別法による鉄粉除去

長岡幸男

1967 年 21 巻 1 号 p. 23-29
発行日: 1967年
公開日: 2013/02/19

DOIhttps://doi.org/10.11457/swsj1965.21.23

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