JPH10113541A - Lithium isotope separating agent and separating process for lithium isotope - Google Patents
Lithium isotope separating agent and separating process for lithium isotopeInfo
- Publication number
- JPH10113541A JPH10113541A JP8291156A JP29115696A JPH10113541A JP H10113541 A JPH10113541 A JP H10113541A JP 8291156 A JP8291156 A JP 8291156A JP 29115696 A JP29115696 A JP 29115696A JP H10113541 A JPH10113541 A JP H10113541A
- Authority
- JP
- Japan
- Prior art keywords
- solution
- lithium
- separating agent
- separating
- agent
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 title claims abstract description 24
- 229910052744 lithium Inorganic materials 0.000 title claims abstract description 24
- 238000000034 method Methods 0.000 title claims abstract description 22
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 47
- 229910001416 lithium ion Inorganic materials 0.000 claims abstract description 47
- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 claims abstract description 32
- 150000001768 cations Chemical class 0.000 claims abstract description 8
- 150000005045 1,10-phenanthrolines Chemical class 0.000 claims abstract description 7
- 150000002430 hydrocarbons Chemical group 0.000 claims abstract description 5
- 229930195733 hydrocarbon Chemical group 0.000 claims abstract description 3
- 125000004435 hydrogen atom Chemical group [H]* 0.000 claims abstract description 3
- 239000004215 Carbon black (E152) Chemical group 0.000 claims abstract 2
- 239000007788 liquid Substances 0.000 abstract description 6
- 229910052739 hydrogen Inorganic materials 0.000 abstract description 2
- 239000001257 hydrogen Substances 0.000 abstract description 2
- 150000002500 ions Chemical class 0.000 abstract 1
- 239000000243 solution Substances 0.000 description 98
- HEDRZPFGACZZDS-UHFFFAOYSA-N Chloroform Chemical compound ClC(Cl)Cl HEDRZPFGACZZDS-UHFFFAOYSA-N 0.000 description 10
- 238000000926 separation method Methods 0.000 description 8
- 230000032258 transport Effects 0.000 description 8
- 239000007864 aqueous solution Substances 0.000 description 7
- WHXSMMKQMYFTQS-BJUDXGSMSA-N (6Li)Lithium Chemical compound [6Li] WHXSMMKQMYFTQS-BJUDXGSMSA-N 0.000 description 5
- 238000005372 isotope separation Methods 0.000 description 5
- 239000003960 organic solvent Substances 0.000 description 5
- HSZCZNFXUDYRKD-UHFFFAOYSA-M lithium iodide Chemical compound [Li+].[I-] HSZCZNFXUDYRKD-UHFFFAOYSA-M 0.000 description 4
- 229910000497 Amalgam Inorganic materials 0.000 description 3
- UHOVQNZJYSORNB-UHFFFAOYSA-N Benzene Chemical compound C1=CC=CC=C1 UHOVQNZJYSORNB-UHFFFAOYSA-N 0.000 description 3
- YXFVVABEGXRONW-UHFFFAOYSA-N Toluene Chemical compound CC1=CC=CC=C1 YXFVVABEGXRONW-UHFFFAOYSA-N 0.000 description 3
- 125000003118 aryl group Chemical group 0.000 description 3
- 150000001875 compounds Chemical class 0.000 description 3
- QSHDDOUJBYECFT-UHFFFAOYSA-N mercury Chemical compound [Hg] QSHDDOUJBYECFT-UHFFFAOYSA-N 0.000 description 3
- 229910052753 mercury Inorganic materials 0.000 description 3
- 125000004108 n-butyl group Chemical group [H]C([H])([H])C([H])([H])C([H])([H])C([H])([H])* 0.000 description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- KBPLFHHGFOOTCA-UHFFFAOYSA-N 1-Octanol Chemical compound CCCCCCCCO KBPLFHHGFOOTCA-UHFFFAOYSA-N 0.000 description 2
- YZCKVEUIGOORGS-NJFSPNSNSA-N Tritium Chemical compound [3H] YZCKVEUIGOORGS-NJFSPNSNSA-N 0.000 description 2
- 239000006096 absorbing agent Substances 0.000 description 2
- 125000001931 aliphatic group Chemical group 0.000 description 2
- 125000000217 alkyl group Chemical group 0.000 description 2
- 125000003710 aryl alkyl group Chemical group 0.000 description 2
- 125000004432 carbon atom Chemical group C* 0.000 description 2
- 125000000753 cycloalkyl group Chemical group 0.000 description 2
- -1 for example Chemical group 0.000 description 2
- ZSIAUFGUXNUGDI-UHFFFAOYSA-N hexan-1-ol Chemical compound CCCCCCO ZSIAUFGUXNUGDI-UHFFFAOYSA-N 0.000 description 2
- 230000007935 neutral effect Effects 0.000 description 2
- 229910052722 tritium Inorganic materials 0.000 description 2
- SCYULBFZEHDVBN-UHFFFAOYSA-N 1,1-Dichloroethane Chemical compound CC(Cl)Cl SCYULBFZEHDVBN-UHFFFAOYSA-N 0.000 description 1
- 125000000094 2-phenylethyl group Chemical group [H]C1=C([H])C([H])=C(C([H])=C1[H])C([H])([H])C([H])([H])* 0.000 description 1
- GDAQBAKXCXCQGF-UHFFFAOYSA-N 8-(3-quinolin-8-yloxypropoxy)quinoline Chemical class C1=CN=C2C(OCCCOC=3C4=NC=CC=C4C=CC=3)=CC=CC2=C1 GDAQBAKXCXCQGF-UHFFFAOYSA-N 0.000 description 1
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 1
- DGEZNRSVGBDHLK-UHFFFAOYSA-N [1,10]phenanthroline Chemical compound C1=CN=C2C3=NC=CC=C3C=CC2=C1 DGEZNRSVGBDHLK-UHFFFAOYSA-N 0.000 description 1
- 230000004913 activation Effects 0.000 description 1
- 150000001298 alcohols Chemical class 0.000 description 1
- 239000012670 alkaline solution Substances 0.000 description 1
- 125000002029 aromatic hydrocarbon group Chemical group 0.000 description 1
- 238000001479 atomic absorption spectroscopy Methods 0.000 description 1
- 125000001797 benzyl group Chemical group [H]C1=C([H])C([H])=C(C([H])=C1[H])C([H])([H])* 0.000 description 1
- 125000000484 butyl group Chemical group [H]C([*])([H])C([H])([H])C([H])([H])C([H])([H])[H] 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 239000012141 concentrate Substances 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 150000003983 crown ethers Chemical class 0.000 description 1
- 125000000113 cyclohexyl group Chemical group [H]C1([H])C([H])([H])C([H])([H])C([H])(*)C([H])([H])C1([H])[H] 0.000 description 1
- 239000008367 deionised water Substances 0.000 description 1
- 229910021641 deionized water Inorganic materials 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 125000001495 ethyl group Chemical group [H]C([H])([H])C([H])([H])* 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 230000004927 fusion Effects 0.000 description 1
- 150000004820 halides Chemical class 0.000 description 1
- 125000004051 hexyl group Chemical group [H]C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])* 0.000 description 1
- 230000037427 ion transport Effects 0.000 description 1
- 230000001678 irradiating effect Effects 0.000 description 1
- 229910003002 lithium salt Inorganic materials 0.000 description 1
- 159000000002 lithium salts Chemical class 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000004949 mass spectrometry Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000012528 membrane Substances 0.000 description 1
- 239000011259 mixed solution Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 125000001624 naphthyl group Chemical group 0.000 description 1
- 125000001997 phenyl group Chemical group [H]C1=C([H])C([H])=C(*)C([H])=C1[H] 0.000 description 1
- 125000001436 propyl group Chemical group [H]C([*])([H])C([H])([H])C([H])([H])[H] 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 239000002904 solvent Substances 0.000 description 1
- 238000000638 solvent extraction Methods 0.000 description 1
- 125000003944 tolyl group Chemical group 0.000 description 1
- 125000005023 xylyl group Chemical group 0.000 description 1
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明はリチウム同位体分離
剤及びそれを用いるリチウム同位体の分離方法に関する
ものである。The present invention relates to a lithium isotope separating agent and a method for separating lithium isotopes using the same.
【０００２】[0002]
【従来の技術】リチウムの自然界における同位体存在比
は6Ｌi約７％、7Ｌi約９３％である。6Ｌiと7Ｌiの分離
が注目されるようになってきたのは、放射化しない7Ｌi
が原子炉の一次冷却用材料として使用できること、及び
6Ｌiが中性子を照射することでトリチウムに変換できる
ことにある。特に、6Ｌiから生成するトリチウムは将来
核融合反応における原料として多量の需要が見込まれる
もので、6Ｌiの分離方法の開発はきわめて重要性が大き
い。現在、6Ｌiと7Ｌiの分離は水銀アマルガム法により
米国及びフランスで実施されている。この方法による6
Ｌiの分離係数（Ｓ．Ｆ）は約１．０５であり、多段分
離による6Ｌiの濃縮が必要であり、大量の水銀を必要と
するとともに、アマルガムが水に溶出する欠点を有して
いる。このため、クラウンエーテルを使用する溶媒抽出
法やカラムによる分離方法等が各国で研究段階にある。
また、本発明者らの一部は、１，３−ビス（８−キノリ
ルオキシ）プロパン誘導体を用いるリチウム同位体分離
方法を提案しているが（特許第１８３８３９２号）、こ
の方法は、分離速度等に問題があった。Isotope abundance ratio in nature of the Prior Art Lithium 6 Li about 7%, 7 Li is about 93%. 6 the separation of Li and 7 Li has come to be noted that no activation 7 Li
Can be used as primary cooling material for the reactor, and
6 Li can be converted to tritium by irradiating neutrons. In particular, in which a large amount of demand is expected as a raw material in the tritium future fusion reaction to produce the 6 Li, a large development is very important in the method of separating 6 Li. Currently, the separation of 6 Li and 7 Li is implemented by the mercury amalgam method in the United States and France. 6 by this method
Li the separation factor (S.F.) is about 1.05, it is necessary to concentrate the 6 Li by multistage separation, as well as require a large amount of mercury, has the disadvantage that amalgam is eluted into water . For this reason, solvent extraction methods using crown ethers, separation methods using columns, and the like are in the research stage in various countries.
Further, some of the present inventors have proposed a lithium isotope separation method using a 1,3-bis (8-quinolyloxy) propane derivative (Japanese Patent No. 1838392). Had a problem.
【０００３】[0003]
【発明が解決しようとする課題】本発明は、6Ｌiと7Ｌi
とを分離するための新しい分離剤及び方法を提供するこ
とをその課題とする。The present invention relates to 6 Li and 7 Li.
It is an object of the present invention to provide a new separating agent and a method for separating the same.
【０００４】[0004]
【課題を解決するための手段】本発明者らは、前記課題
を解決すべく鋭意研究を重ねた結果、下記一般式（１）
で表されるビス（１，１０−フェナントロリン）誘導体
がリチウム同位体分離剤として作用することを見出し、
本発明を完成するに至った。即ち、本発明によれば、下
記一般式（１）で表されるビス（１，１０−フェナント
ロリン）誘導体からなるリチウム同位体分離剤が提供さ
れる。また、本発明によれば、溶液中に含まれるリチウ
ムイオンを陽イオン輸送剤を介してリチウム受容液に輸
送する方法において、該陽イオン輸送剤として前記リチ
ウム同位体分離剤を用い、6Ｌiイオンを選択的に受容液
に輸送させることを特徴とするリチウム同位体の分離方
法が提供される。さらに、本発明によれば、溶液中に含
まれるリチウムイオンを抽出剤溶液と接触させてリチウ
ムイオンを抽出剤溶液に抽出する方法において、該抽出
剤溶液として前記リチウム同位体分離剤を含む溶液を用
い、6Ｌiイオンを選択的に抽出剤溶液に抽出させること
を特徴とするリチウム同位体の分離方法が提供される。Means for Solving the Problems The present inventors have conducted intensive studies to solve the above-mentioned problems, and as a result, the following general formula (1)
It has been found that a bis (1,10-phenanthroline) derivative represented by the following formula acts as a lithium isotope separating agent,
The present invention has been completed. That is, according to the present invention, a lithium isotope separating agent comprising a bis (1,10-phenanthroline) derivative represented by the following general formula (1) is provided. Further, according to the present invention, a method of transporting lithium ions contained in the solution of lithium acceptor liquid through the cation-transporting agent, using the lithium isotope separation agent as cation transport agent, 6 Li ions Is selectively transported to a receiving solution, whereby a method for separating a lithium isotope is provided. Further, according to the present invention, in a method for extracting lithium ions into an extractant solution by contacting lithium ions contained in the solution with the extractant solution, the extractant solution includes the solution containing the lithium isotope separating agent. The present invention provides a method for separating a lithium isotope, wherein the method comprises selectively extracting 6 Li ions into an extractant solution.
【０００５】[0005]
【化１】 （前記式中、Ｒは水素又は炭化水素基であり、ｎは１〜
１０の数を示す）Embedded image (In the above formula, R is hydrogen or a hydrocarbon group, and n is 1 to
Indicate the number of 10)
【０００６】[0006]
【発明の実施の形態】前記一般式（１）において、Ｒを
示す炭化水素基には、脂肪族炭化水素基及び芳香族炭化
水素基が包含される。脂肪族炭化水素基としては、アル
キル基やシクロアルキル基が挙げられる。アルキル基の
具体例としては、炭素数１〜１２、好ましくは２〜６の
もの、例えば、エチル、プロピル、ブチル、ヘキシル等
が示される。シクロアルキル基としては、シクロヘキシ
ル等が示される。芳香族基としては、アリール基やアリ
ールアルキル基が挙げられる。アリール基の具体例とし
ては、フェニル、トリル、キシリル、ナフチル等が示さ
れる。アリールアルキル基としては、ベンジル、フェネ
チル等が示される。前記一般式（１）におけるｎは、１
〜１０、好ましくは４〜８の数である。前記一般式
（１）におけるＲの具体的種類は、そのビス（１，１０
−フェナントロリン）誘導体に所望される有機溶媒に対
する溶解性等に応じて適宜決められる。本発明で用いら
れるビス（１，１０−フェナントロリン）誘導体は公知
の化合物であり、その製造方法については、文献（Ｃｈ
ｅｍ．Ｌｅｔｔｅｒｓ，１９９４，３９７）に記載され
ている。BEST MODE FOR CARRYING OUT THE INVENTION In the general formula (1), the hydrocarbon group represented by R includes an aliphatic hydrocarbon group and an aromatic hydrocarbon group. Examples of the aliphatic hydrocarbon group include an alkyl group and a cycloalkyl group. Specific examples of the alkyl group include those having 1 to 12 carbon atoms, preferably 2 to 6 carbon atoms, for example, ethyl, propyl, butyl, hexyl and the like. Examples of the cycloalkyl group include cyclohexyl and the like. Examples of the aromatic group include an aryl group and an arylalkyl group. Specific examples of the aryl group include phenyl, tolyl, xylyl, naphthyl and the like. Examples of the arylalkyl group include benzyl, phenethyl and the like. N in the general formula (1) is 1
10 to 10, preferably 4 to 8. The specific type of R in the general formula (1) is the bis (1,10
-Phenanthroline) derivative is appropriately determined according to the desired solubility in an organic solvent and the like. The bis (1,10-phenanthroline) derivative used in the present invention is a known compound, and its production method is described in the literature (Ch
em. Letters, 1994 , 397).
【０００７】本発明で用いる前記一般式（１）で表され
るビス（１，１０−フェナントロリン）誘導体（以下、
単に分離剤とも言う）は、リチウム同位体分離剤として
作用する。即ち、溶液中に含まれるリチウムイオンを陽
イオン輸送剤（キャリヤー）を介してリチウムイオン受
容液に輸送するに際し、その陽イオン輸送剤として、前
記分離剤を用いることにより、6Ｌiイオンを選択的又は
優勢的に受容液に輸送することができる。また、溶液中
に含まれるリチウムイオンを抽出剤溶液と接触させてリ
チウムイオンを抽出剤溶液に抽出するに際し、その抽出
剤溶液として、前記分離剤溶液を用いることにより、6
Ｌiイオンを選択的に抽出剤溶液に抽出させることがで
きる。本発明によるリチウム同位体の分離方法における
同位体分離係数は、水銀アマルガム法と同程度である
が、本発明の場合、その分離剤の合成が容易である上、
繰返し使用することができるので、少量の分離剤の使用
で多量のリチウムイオンを処理することができる等の利
点を有する。The bis (1,10-phenanthroline) derivative represented by the general formula (1) used in the present invention (hereinafter, referred to as
Simply acts as a lithium isotope separating agent). That is, when the lithium ions contained in the solution are transported to the lithium ion receiving solution via the cation transport agent (carrier), the 6 Li ions can be selectively used by using the separating agent as the cation transport agent. Alternatively, it can be predominantly transported to the receiving fluid. Further, when the lithium ions contained in the solution are brought into contact with the extractant solution to extract the lithium ions into the extractant solution, by using the separating agent solution as the extractant solution, 6
Li ions can be selectively extracted into the extractant solution. The isotope separation coefficient in the method for separating lithium isotopes according to the present invention is almost the same as that of the mercury amalgam method, but in the case of the present invention, the separation agent is easily synthesized,
Since it can be used repeatedly, there is an advantage that a large amount of lithium ions can be treated by using a small amount of the separating agent.
【０００８】本発明の分離剤を陽イオン輸送剤として用
いてリチウムイオン同位体を分離するには、リチウムイ
オンを含む溶液Ａと、リチウムイオン受容液Ｂとを本発
明の分離剤を介して接触させればよい。このための方法
としては、分離剤を、溶液Ａ及び受容液Ｂに対して非混
和性の有機溶媒に溶解させて、分離剤溶液Ｍを作り、こ
の溶液Ｍを介して溶液Ａと受容液Ｂを間接的に接触させ
る方法、溶液Ｍを隔膜により仕切られた区画室に収容さ
せ、この区画室を介して溶液Ａと受容液Ｂとを間接的に
接触させる方法、溶液Ｍを多孔質高分子膜や濾紙等の支
持体に吸収させて溶液Ｍ吸収体を作り、この吸収体を介
して溶液Ａと受容液Ｂとを間接的に接触させる方法等が
挙げられる。In order to separate lithium ion isotopes using the separating agent of the present invention as a cation transporting agent, a solution A containing lithium ions and a lithium ion receiving solution B are contacted via the separating agent of the present invention. It should be done. As a method for this, a separating agent is dissolved in an organic solvent immiscible with the solution A and the receiving solution B to form a separating agent solution M, and the solution A and the receiving solution B are dissolved through the solution M. The solution M is accommodated in a compartment partitioned by a diaphragm, and the solution A and the receiving solution B are indirectly contacted via the compartment; There is a method in which a solution M absorber is prepared by absorbing the solution M into a support such as a membrane or filter paper, and the solution A and the receiving solution B are indirectly contacted via the absorber.
【０００９】図１に、溶液Ａと受容液Ｂとを溶液Ｍを介
して間接的に接触させる場合の装置説明図を示す。１
は、Ｕ字形の容器を示し、筒状容器２、３とそれらの下
部を連結する連結管４とから構成される。５、６は撹拌
機である。この装置を用いてリチウム同位体を分離する
には、この容器に対して、先ず分離剤溶液Ｍを中間溶液
層として入れ、次に、一方の筒状容器に溶液Ａ及び他方
の筒状容器３に受容液Ｂを入れる。なお、溶液Ｍは溶液
Ａ及び受容液Ｂと実質上非混和性のものである。溶液Ａ
は、輸送対象となるリチウムイオンを含むもので、通
常、水溶液が用いられるが、必ずしも水溶液に限定され
るものではなく、有機溶媒と水との混合溶液や、アルコ
ール等の有機溶媒も適用される。また、この溶液Ａは、
通常、ｐＨ６〜７近辺の中性溶液ないしアルカリ性溶液
が用いられる。受容液Ｂは、輸送されるリチウムイオン
を受け取るためのもので、脱イオン溶液が用いられ、一
般には、中性の水溶液が用いられる。溶液Ｍの形成に用
いられる溶媒は、溶液Ａ及び受容液Ｂと実質上非混和性
のもの、例えば、溶液Ａ及び受容液Ｂが水溶液である場
合は、クロロホルム、ジクロルエタンなどの有機ハロゲ
ン化物や、ベンゼン、トルエン等の炭化水素、さらにヘ
キサノール、オクタノールなどの水難溶性アルコール等
が適用される。FIG. 1 is an explanatory view of an apparatus in a case where a solution A and a receiving solution B are indirectly contacted via a solution M. 1
Denotes a U-shaped container, which is composed of cylindrical containers 2 and 3 and a connecting pipe 4 connecting the lower portions thereof. 5 and 6 are agitators. In order to separate lithium isotopes using this apparatus, first, a separating agent solution M is put into this container as an intermediate solution layer, and then the solution A and the other cylindrical container 3 are placed in one cylindrical container. Put the receiving solution B into the container. The solution M is substantially immiscible with the solution A and the receiving solution B. Solution A
Is a solution containing lithium ions to be transported, and usually an aqueous solution is used, but the solution is not necessarily limited to the aqueous solution, and a mixed solution of an organic solvent and water, or an organic solvent such as alcohol is also applied. . Also, this solution A
Usually, a neutral solution or an alkaline solution having a pH of about 6 to 7 is used. The receiving liquid B is for receiving lithium ions to be transported, and a deionized solution is used. Generally, a neutral aqueous solution is used. The solvent used for forming the solution M is substantially immiscible with the solution A and the receiving solution B. For example, when the solution A and the receiving solution B are aqueous solutions, an organic halide such as chloroform and dichloroethane, Hydrocarbons such as benzene and toluene, and poorly water-soluble alcohols such as hexanol and octanol are used.
【００１０】前記のようにして、溶液Ａ及び受容液Ｂを
分離剤を介して間接接触させるときには、溶液Ａ中のリ
チウムイオンは分離剤に捕捉され、このリチウムイオン
を捕捉した分離剤は、受容液Ｂと接触し、受容液Ｂ中に
その捕捉したリチウムイオンを放出する。このようにし
て、溶液Ａ中のリチウムイオンは受容液Ｂ中に輸送され
る。即ち、溶液Ａ中に溶解していたリチウムイオンは溶
液Ｍ中を移動し、受容液Ｂ中に放出される。この際、リ
チウム同位体のうち6Ｌiが選択的に受容液Ｂ中に輸送さ
れるが、その6Ｌiイオンが受容液Ｂ中に輸送される割合
は、下記式で表される同位体分離係数（α）により決ま
る。 ここで、（［6Ｌi］／［7Ｌi］）(B)及び（［6Ｌi］／
［7Ｌi］）(A)はそれぞれ、受容液Ｂ、溶液Ａにおける
リチウムイオンの同位体存在比を示す。As described above, the solution A and the receiving solution B
When indirectly contacting via a separating agent, the solution in solution A
The lithium ions are trapped by the separating agent,
The separating agent having captured is contacted with the receiving solution B, and
The captured lithium ions are released. Like this
Thus, the lithium ions in the solution A are transported into the receiving solution B.
You. That is, the lithium ions dissolved in the solution A are dissolved.
It moves in the liquid M and is released into the receiving liquid B. At this time,
Of the isotopes of T6Li is selectively transported into the receiving solution B.
But that6Rate at which Li ions are transported into receiving solution B
Is determined by the isotope separation coefficient (α)
You. here,([6Li] / [7Li])(B)as well as([6Li] /
[7Li])(A)In the receiving solution B and the solution A, respectively.
This shows the isotope abundance ratio of lithium ions.
【００１１】一方、本発明の分離剤を抽出剤として用い
て溶液Ａ中に存在するリチウムイオンを抽出するには、
リチウムイオン含有溶液に対して分離剤溶液Ｍを接触さ
せた後、溶液Ａと溶液Ｍとを相分離させればよい。この
操作によって溶液Ａ中のリチウムイオンは溶液Ｍ中に抽
出移動される。この場合、溶液Ａと溶液Ｍは実質的に非
混和性のものであり、通常、溶液Ａとしては水溶液が用
いられ、溶液Ｍとしては、非水溶性有機溶媒溶液が用い
られる。溶液Ａ中のリチウムイオンのうちの6Ｌiイオン
が溶液Ｍに抽出移動する割合は、下記式で表される同位
体分離係数（α）により決まる。 ここで、（［6Ｌi］／［7Ｌi］）(M)及び（［6Ｌi］／
［7Ｌi］）(A)はそれぞれ、溶液Ｍ相、溶液Ａ相におけ
るリチウムイオンの同位体存在比を示す。On the other hand, the separating agent of the present invention is used as an extracting agent.
To extract lithium ions present in the solution A by
The separating agent solution M is brought into contact with the lithium ion-containing solution.
After that, the solution A and the solution M may be phase-separated. this
By the operation, lithium ions in the solution A are extracted into the solution M.
Move out. In this case, solution A and solution M are substantially non-
It is miscible, and usually an aqueous solution is used as the solution A.
As the solution M, a water-insoluble organic solvent solution is used.
Can be Of lithium ions in solution A6Li ion
Is extracted and moved to the solution M by the isotope represented by the following formula.
It is determined by the body separation coefficient (α). here,([6Li] / [7Li])(M)as well as([6Li] /
[7Li])(A)In the solution M phase and the solution A phase, respectively.
Shows the isotope abundance ratio of lithium ions.
【００１２】前記のようにして、6Ｌiイオンの濃縮され
た溶液が得られるが、このようにして得られた6Ｌiイオ
ン濃縮溶液に対し、再度前記と同様の分離操作を施すこ
とにより、6Ｌiイオンがさらに濃縮された溶液を得るこ
とができる。このような濃縮操作を繰返し行うことによ
り、6Ｌiイオンを高濃度で含む溶液を得ることができ
る。[0012] As described above, but concentrated solution of 6 Li ions is obtained, thus to 6 Li ions concentrated solution thus obtained, by applying the same separating operation again, 6 A solution in which Li ions are further concentrated can be obtained. By repeatedly performing such a concentration operation, a solution containing a high concentration of 6 Li ions can be obtained.
【００１３】[0013]
【実施例】次に本発明を実施例によりさらに詳細に説明
する。Next, the present invention will be described in more detail with reference to examples.
【００１４】実施例１ 図１に示した装置を用いてリチウムイオンの輸送試験を
２５℃で行った。輸送剤としては、前記一般式（１）に
おいて、ｎ＝４〜８、Ｒ＝ｎ−ブチルの化合物を用い
た。溶液Ａ、受容液Ｂ及び分離剤溶液Ｍの成分組成は次
の通りである。 溶液Ａ ：２．０Ｍ ヨウ化リチウムを含む水溶液１５ｍｌ。 受容液Ｂ ：脱イオン水１５ｍｌ。 分離剤溶液Ｍ：分離剤３×１０-4ｍｏｌ（Ｒ＝ｎ−ブチル、ｎ＝６の化合物の みは１×１０-4ｍｏｌを使用した）をクロロホルム３０ｍｌに 溶解して形成した溶液。 溶液Ａ、受容液Ｂ及び分離剤溶液Ｍは恒温槽中２５℃に
保持した。溶液Ａから受容液Ｂへ輸送された２日後のリ
チウムイオン量を原子吸光分析により測定し、リチウム
イオン同位体比を質量分析計により測定した。表１に、
全リチウムイオン輸送量及び6Ｌiに関する分離係数αを
示す。Example 1 A transport test of lithium ions was conducted at 25 ° C. using the apparatus shown in FIG. As the transport agent, a compound in which n = 4 to 8 and R = n-butyl in the general formula (1) was used. The component compositions of the solution A, the receiving solution B, and the separating agent solution M are as follows. Solution A: 15 ml of an aqueous solution containing 2.0 M lithium iodide. Recipient B: 15 ml of deionized water. Separating agent solution M: a solution formed by dissolving 3 × 10 −4 mol of separating agent (1 × 10 −4 mol was used only for the compound of R = n-butyl, n = 6) in 30 ml of chloroform. Solution A, receiving solution B and separating agent solution M were kept at 25 ° C. in a thermostat. Two days after the transport from the solution A to the receiving solution B, the amount of lithium ions was measured by atomic absorption spectrometry, and the lithium ion isotope ratio was measured by a mass spectrometer. In Table 1,
The total lithium ion transport rate and the separation coefficient α for 6 Li are shown.
【００１５】[0015]
【表１】 [Table 1]
【００１６】実施例２ 抽出剤溶液Ｍとして、３．０×１０-4ｍｏｌの分離剤
（前記一般式（１）において、ｎ＝７、Ｒ＝ｎ−ブチ
ル）を１５ｍｌクロロホルムに溶解した溶液を用い、こ
の溶液Ｍを、２．０Ｍヨウ化リチウムを含む水溶液Ａ１
５ｍｌとともに振とうした後、クロロホルム相を分離
し、リチウム塩をクロロホルム相から抽出剤とともに取
り出し、質量分析して同位体比を調べた。２５℃での同
位体分離係数としてα＝１．０１４が得られた。Example 2 As an extractant solution M, a solution prepared by dissolving 3.0 × 10 −4 mol of a separating agent (n = 7 in the above formula (1), R = n-butyl) in 15 ml of chloroform was used. This solution M was used as an aqueous solution A1 containing 2.0 M lithium iodide.
After shaking with 5 ml, the chloroform phase was separated, and the lithium salt was taken out of the chloroform phase together with the extractant and subjected to mass spectrometry to determine the isotope ratio. Α = 1.014 was obtained as the isotope separation coefficient at 25 ° C.
【００１７】[0017]
【発明の効果】本発明の分離剤を用いることにより、6
Ｌiイオンと7Ｌiイオンを分離することができる。[Effect of the Invention] By using the separating agent of the present invention, 6
Li ions and 7 Li ions can be separated.
【図１】本発明のビス（１，１０−フェナントロリン）
誘導体を輸送剤として用いて陽イオンの輸送を行う場合
の装置説明図である。FIG. 1. Bis (1,10-phenanthroline) of the present invention
It is an explanatory view of a device in the case of carrying out cation transport using a derivative as a transport agent.
１ Ｕ字型容器 ２ 筒状容器 ３ 筒状容器 ４ 連結管 ５ 撹拌機 ６ 攪拌機 DESCRIPTION OF SYMBOLS 1 U-shaped container 2 Cylindrical container 3 Cylindrical container 4 Connecting pipe 5 Stirrer 6 Stirrer
───────────────────────────────────────────────────── フロントページの続き (72)発明者 加納 博文 香川県高松市林町2217番14 工業技術院四 国工業技術研究所 ──────────────────────────────────────────────────続 き Continued on the front page (72) Inventor Hirofumi Kano 2217-14 Hayashi-cho, Takamatsu-shi, Kagawa Pref.
Claims (3)
化水素基を示す）で表わされるビス（１，１０−フェナ
ントロリン）誘導体からなるリチウム同位体分離剤。[Claim 1] The following general formula: (Wherein n is a number from 1 to 10, and R represents a hydrogen atom or a hydrocarbon group). A lithium isotope separating agent comprising a bis (1,10-phenanthroline) derivative represented by the following formula:
オン輸送剤を介してリチウム受容液に輸送する方法にお
いて、該陽イオン輸送剤として請求項１のリチウム同位
体分離剤を用い、6Ｌiイオンを選択的に受容液に輸送さ
せることを特徴とするリチウム同位体の分離方法。2. A method for transporting lithium ions contained in a solution to a lithium receiving solution via a cation transport agent, wherein the lithium isotope separating agent according to claim 1 is used as the cation transport agent, and 6 Li ions are used. A lithium isotope is selectively transported to a receiving solution.
剤溶液と接触させてリチウムイオンを抽出剤溶液に抽出
する方法において、該抽出剤溶液として請求項１のリチ
ウム同位体分離剤を含む溶液を用い、6Ｌiイオンを選択
的に抽出剤溶液に抽出させることを特徴とするリチウム
同位体の分離方法。3. A method for contacting lithium ions contained in a solution with an extractant solution to extract lithium ions into the extractant solution, wherein the extractant solution comprises the solution containing the lithium isotope separating agent according to claim 1. A method for separating lithium isotopes, wherein 6 Li ions are selectively extracted into an extractant solution.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8291156A JP2847182B2 (en) | 1996-10-14 | 1996-10-14 | Lithium isotope separating agent and method for separating lithium isotope |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8291156A JP2847182B2 (en) | 1996-10-14 | 1996-10-14 | Lithium isotope separating agent and method for separating lithium isotope |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH10113541A true JPH10113541A (en) | 1998-05-06 |
| JP2847182B2 JP2847182B2 (en) | 1999-01-13 |
Family
ID=17765178
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP8291156A Expired - Lifetime JP2847182B2 (en) | 1996-10-14 | 1996-10-14 | Lithium isotope separating agent and method for separating lithium isotope |
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| Country | Link |
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| JP (1) | JP2847182B2 (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2010029797A (en) * | 2008-07-29 | 2010-02-12 | Japan Atomic Energy Agency | Lithium isotope separation and condensation method, apparatus, measure, lithium ion selective permeation membrane, and lithium isotope concentrate |
| WO2013026866A2 (en) | 2011-08-23 | 2013-02-28 | Syngenta Participations Ag | Novel microbiocides |
| CN104147929A (en) * | 2013-06-17 | 2014-11-19 | 中国科学院上海有机化学研究所 | Novel reflux cascade technology for producing lithium-7 isotopes |
| JP2015536234A (en) * | 2012-11-05 | 2015-12-21 | 上海 インスティテュート オブ オーガニック ケミストリー、チャイニーズ アカデミー オブ サイエンシーズＳｈａｎｇｈａｉ Ｉｎｓｔｉｔｕｔｅ Ｏｆ Ｏｒｇａｎｉｃ Ｃｈｅｍｉｓｔｒｙ， Ｃｈｉｎｅｓｅ Ａｃａｄｅｍｙ Ｏｆ Ｓｃｉｅｎｃｅｓ | Extraction agent for lithium isotope separation and its application |
| CN112619417A (en) * | 2020-12-17 | 2021-04-09 | 中国科学院青海盐湖研究所 | Extraction separation and enrichment based on multi-stage oscillation7Method for Li |
-
1996
- 1996-10-14 JP JP8291156A patent/JP2847182B2/en not_active Expired - Lifetime
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2010029797A (en) * | 2008-07-29 | 2010-02-12 | Japan Atomic Energy Agency | Lithium isotope separation and condensation method, apparatus, measure, lithium ion selective permeation membrane, and lithium isotope concentrate |
| WO2013026866A2 (en) | 2011-08-23 | 2013-02-28 | Syngenta Participations Ag | Novel microbiocides |
| JP2015536234A (en) * | 2012-11-05 | 2015-12-21 | 上海 インスティテュート オブ オーガニック ケミストリー、チャイニーズ アカデミー オブ サイエンシーズＳｈａｎｇｈａｉ Ｉｎｓｔｉｔｕｔｅ Ｏｆ Ｏｒｇａｎｉｃ Ｃｈｅｍｉｓｔｒｙ， Ｃｈｉｎｅｓｅ Ａｃａｄｅｍｙ Ｏｆ Ｓｃｉｅｎｃｅｓ | Extraction agent for lithium isotope separation and its application |
| CN104147929A (en) * | 2013-06-17 | 2014-11-19 | 中国科学院上海有机化学研究所 | Novel reflux cascade technology for producing lithium-7 isotopes |
| CN112619417A (en) * | 2020-12-17 | 2021-04-09 | 中国科学院青海盐湖研究所 | Extraction separation and enrichment based on multi-stage oscillation7Method for Li |
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| Publication number | Publication date |
|---|---|
| JP2847182B2 (en) | 1999-01-13 |
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