JPS6046931A - Regeneration of extractant for solvent extraction - Google Patents
Regeneration of extractant for solvent extractionInfo
- Publication number
- JPS6046931A JPS6046931A JP15149983A JP15149983A JPS6046931A JP S6046931 A JPS6046931 A JP S6046931A JP 15149983 A JP15149983 A JP 15149983A JP 15149983 A JP15149983 A JP 15149983A JP S6046931 A JPS6046931 A JP S6046931A
- Authority
- JP
- Japan
- Prior art keywords
- extractant
- phosphoric acid
- back extraction
- aqueous solution
- extraction
- 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.)
- Pending
Links
Landscapes
- Physical Water Treatments (AREA)
- Extraction Or Liquid Replacement (AREA)
- Compounds Of Iron (AREA)
Abstract
Description
【発明の詳細な説明】
本発明は、ジー２−エチルへキシルリン酸（以下、ｒＤ
２ＥＨＰＡＪと略記する）を抽出剤と１〜で用いる溶媒
抽出工程を経た前記抽出剤の再生法に関する。DETAILED DESCRIPTION OF THE INVENTION The present invention provides di-2-ethylhexyl phosphoric acid (rD
2EHPAJ) is used as an extractant in 1 to 1.
］）２ＥＨＰＡは陽イオン交換型の溶媒抽出剤としてウ
ラン、希土類金属、ニッケル、コバルｌ−，インジウム
、錫などの溶媒抽出に広く使用されている。溶媒抽出に
用いたＤ２ＥＨＰＡは被抽出成分を含むため、逆抽出剤
によシこれら成分を逆抽出１７て再生する必、侠がある
。ととろが、被抽出成分の中には逆抽出（７難いものが
あり、Ｉ）２ＥＨＩ）Ａ再生の妨げとなることがある。]) 2EHPA is widely used as a cation exchange type solvent extractant for solvent extraction of uranium, rare earth metals, nickel, cobal l-, indium, tin, etc. Since the D2EHPA used for solvent extraction contains components to be extracted, it is necessary to back-extract these components using a back-extracting agent and regenerate them. However, some of the components to be extracted are difficult to extract and may interfere with regeneration.
特に、被抽出成分にＦｅ（］ＩＩＩが含まれている場合
には、Ｆ’ｅ（ＩＩＩ）がＩｌ！Ｊ、常連抽出剤として
使用される多くの鉱酸に対して逆抽出の速度が遅いため
に、抽出操作を繰り返すうちに抽出剤であるＩ）２ＥＨ
ＰＡ中に次第に蓄積して行く傾向がある。Ｆｅ （Ｉｌ
ｌ ）がある程度蓄積すると。In particular, when the extracted component contains Fe(]III, F'e(III) is Il!J, and the back extraction rate is slow for many mineral acids commonly used as extractants. Therefore, as the extraction operation is repeated, the extractant I)2EH
It tends to accumulate gradually during PA. Fe (Il
l) accumulates to a certain extent.
Ｄ２ＥＨＰＡの金屑に対する掘出能力が低下するととも
に、相分離時間が長くなるという支障が生ずる。このこ
とが、Ｄ２ＥＨＰＡを抽出剤として使用する場合の最下
の問題となっていた。そこで被処理液を溶媒抽出工程に
供する前に、該被処理液中のＦｅ（ｉｌｌ）を沈殿除去
する工程を設けたり、Ｆｅ（１１１）をＦｅ（ＩＩＪ
に還元する工程を設ける試みがなされた。しかし、いず
れの方法も、Ｆｅ（Ｉｌｌ、ｌが大量に共イｒする場合
にはこれらの前処理工程が大損りなものとなるため実用
的ではなかった。−ｉ：だ。Problems arise in that the ability of D2EHPA to dig out gold scraps decreases and the phase separation time increases. This has been the ultimate problem when using D2EHPA as an extractant. Therefore, before the liquid to be treated is subjected to the solvent extraction process, a step is provided to precipitate and remove Fe(ill) in the liquid to be treated, or Fe(111) is removed from Fe(IIJ).
Attempts were made to provide a process to reduce the However, none of these methods is practical because these pretreatment steps become a major loss when a large amount of Fe(Ill, l co-irradiates).-i:.
ＤＺＥＨＰＡ中のＦｅ（ＩＩＩ）をシュウ酸水溶液で逆
抽出する方法が試みられ、かなりの効果を達成したが、
コスト高となるため工業的規模の使用は困難であった。A method of back-extracting Fe(III) in DZEHPA with an aqueous oxalic acid solution was attempted, and considerable results were achieved.
Due to the high cost, it was difficult to use it on an industrial scale.
本発明者はＤＺＥＨＰＡ中のＦｅ （ＩＩｌ、 ）を迅
速に逆抽出し得る安価な逆抽出剤をめて種々検討を重ね
た結べ、リン酸がこの目的に最も適していることを見い
出して本発明に至った。The present inventor conducted various studies in search of an inexpensive back-extracting agent capable of rapidly back-extracting Fe (IIl, ) in DZEHPA, and found that phosphoric acid was most suitable for this purpose. reached.
すなわち２本発明によシアジ−２−エチルへキシルリン
酸を抽出剤として用いる溶媒抽出工程を経た前記抽出剤
を、リン酸水溶液と接触させることからなる。抽出剤の
再生法が提供される。That is, according to the second invention, the extractant that has undergone a solvent extraction step using cyadi-2-ethylhexyl phosphoric acid as an extractant is brought into contact with an aqueous phosphoric acid solution. A method for regenerating an extractant is provided.
逆抽出剤として作用するリン酸水溶液と有機溶媒１）２
ＥＩＩＰｆｉ、との接触法は多様にありうるが７通常の
逆抽出工程のとおりでよい。Phosphoric acid aqueous solution and organic solvent that act as back extractants 1) 2
There may be various methods of contacting with EIIPfi, but it may be the same as the usual back extraction process.
逆抽出に用いる水溶液のリン酸濃度は６〜３ＯＮである
ことを要し、好ましくｔま１５〜２７Ｎである。The phosphoric acid concentration of the aqueous solution used for back extraction must be 6 to 3N, preferably 15 to 27N.
６Ｎ以下では逆抽出率が５０チ以下となりかつイ布薄な
逆抽出廃液が大量に発生して好ましくない。If it is less than 6N, the back extraction rate will be less than 50% and a large amount of thin back extraction waste liquid will be generated, which is not preferable.
寸だ３ＯＮを越えると水溶液の粘性が増して相分離が悪
くなる。有機相と水相の容積比（以下０／Ａ比と略記）
は２％に制限はないが逆抽出廃液の発生量を低く抑える
ためには１〜１０程度が望ましい。リン酸はＦｅ（ＩＩ
Ｉ）などとほぼ化学量論的に反応し終わる棟で使用でき
る。If it exceeds 3ON, the viscosity of the aqueous solution will increase and phase separation will worsen. Volume ratio of organic phase to aqueous phase (hereinafter abbreviated as 0/A ratio)
is not limited to 2%, but it is preferably about 1 to 10 in order to keep the amount of back extraction waste liquid low. Phosphoric acid is Fe(II
It can be used in buildings where the reaction with I) etc. is almost stoichiometric.
以下実施例によって本発明を具体的に説明する。EXAMPLES The present invention will be specifically explained below with reference to Examples.
実施例１
６．４ｇ／ｌのＦｅ （ｉｌｌ ）を含む２０ｖｏ１％
の１）ＺＥＨＰＡケロシン溶液をイ１１１々の濃度（５
Ｎ、ＩＯＮ。Example 1 20vo1% containing 6.4g/l Fe(ill)
1) ZEHPA kerosene solution at different concentrations (5
N.ION.
１５Ｎ、２ＯＮ及び２５Ｎ）のリン酸水溶液と０／Ａ比
１で１０分間攪拌混合した後、各相中のＦ’ｅ （ＩＩ
Ｉ ）濃度を化学分析によりめ、逆抽出率を算出した。F'e (II
I) The concentration was determined by chemical analysis and the back extraction rate was calculated.
結果は第１図に示すとおりであった。The results were as shown in Figure 1.
実施例２
Ｃｕ （ＩＩ） ４．４９／Ｌ Ｌｎ （ＩＩυ２．１
２１ ／７ ＋ Ｆｅ （ＩＩＬ）１４．５ｇ／ｌを含
む硫酸酸性溶液と２０ｖｏ１％のＤ２ＥＨＰＡケロシン
溶液をＯ／Ａ比１／２で１０分間混合した後、相分離し
、有機相を６Ｎ塩ｒ＊溶液とＯ／Ａ比１／２で逆抽出し
た。この操作を各３０回反復して１回目と３０回目の抽
出テークを比較したところ表１の（イ）（ロ）に示すよ
うに抽出能力の低下が見られた。そこで３０回目の塩酸
逆抽出後、相分離した有機相を２５ＮＩＪン酸と０／Ａ
比６で１０分間混合して逆抽出した。逆抽出後の有機相
を用いて３１回目の前記抽出工程を実施したところ２表
１の（ハ）の結果が得られ、有機溶媒の再生が確かめら
れた。Example 2 Cu (II) 4.49/L Ln (IIυ2.1
After mixing a sulfuric acid acidic solution containing 14.5 g/l of 21/7 + Fe (IIL) and a 20 vol 1% D2EHPA kerosene solution at an O/A ratio of 1/2 for 10 minutes, the phases were separated and the organic phase was soaked with 6N salt r. *Back extraction was carried out using the solution and O/A ratio of 1/2. When this operation was repeated 30 times each and the 1st and 30th extraction takes were compared, a decrease in extraction ability was observed as shown in (a) and (b) of Table 1. Therefore, after the 30th hydrochloric acid back extraction, the phase-separated organic phase was mixed with 25NIJ acid and 0/A
Mix and back-extract at ratio 6 for 10 minutes. When the above extraction step was performed for the 31st time using the organic phase after back extraction, the results shown in (c) in Table 2 were obtained, confirming the regeneration of the organic solvent.
表１
１ｎ（ＩＩＩ）抽出率、Ｆｅ（ＩＩＪ）抽出率、相分離
所要時間（イ）第１回目 ９２６０％ ６０襲 ２分３
０秒（ロ）第３０回目 ６３．６％ ５２憐 ７分２０
秒１、、、ｌ第３１回目 ９１．７％ ６０％ ２分３
５秒Table 1 1n(III) extraction rate, Fe(IIJ) extraction rate, time required for phase separation (a) 1st 9260% 60 rounds 2 minutes 3
0 seconds (ro) 30th 63.6% 52 Ren 7 minutes 20
Second 1,,,l 31st 91.7% 60% 2 minutes 3
5 seconds
第１図は、リン酸水浴液濃度とジー２−エチルへキシル
リン酸からのＦｅ （Ｉ旧道抽出率の関係を表すグラフ
である。
％許出Ｍ［（人三菱金属株式会社
代理人弁理士松井政広
弁理士岩見谷 周 志Figure 1 is a graph showing the relationship between the concentration of phosphoric acid water bath solution and the extraction rate of Fe (I) from di-2-ethylhexyl phosphoric acid. Masahiro Patent Attorney Zhou Iwamiya
Claims (1)
る溶媒抽出工程を経た前記抽出剤を、リン酸水溶液と接
触させることからなる。抽出剤の再生法。 ２、特許請求の範囲第１項記載の再生法であって。 リン酸水溶液の濃度が６〜３ＯＮである方法。[Scope of Claims] 1. The extractant that has undergone a solvent extraction step using di-2-ethylhexyl phosphoric acid as an extractant is brought into contact with an aqueous phosphoric acid solution. Extractant regeneration method. 2. A regeneration method according to claim 1. A method in which the concentration of the phosphoric acid aqueous solution is 6 to 3 ON.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP15149983A JPS6046931A (en) | 1983-08-22 | 1983-08-22 | Regeneration of extractant for solvent extraction |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP15149983A JPS6046931A (en) | 1983-08-22 | 1983-08-22 | Regeneration of extractant for solvent extraction |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS6046931A true JPS6046931A (en) | 1985-03-14 |
Family
ID=15519838
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP15149983A Pending JPS6046931A (en) | 1983-08-22 | 1983-08-22 | Regeneration of extractant for solvent extraction |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6046931A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS61162428U (en) * | 1985-03-30 | 1986-10-08 | ||
| JPS62195235A (en) * | 1986-02-21 | 1987-08-28 | 石田 昌美 | Fishing bait protector at time of throwing of fishing line |
-
1983
- 1983-08-22 JP JP15149983A patent/JPS6046931A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS61162428U (en) * | 1985-03-30 | 1986-10-08 | ||
| JPS62195235A (en) * | 1986-02-21 | 1987-08-28 | 石田 昌美 | Fishing bait protector at time of throwing of fishing line |
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