JP3028254B2 - Reprocessing method of reprocessed organic solvent - Google Patents
Reprocessing method of reprocessed organic solventInfo
- Publication number
- JP3028254B2 JP3028254B2 JP20899091A JP20899091A JP3028254B2 JP 3028254 B2 JP3028254 B2 JP 3028254B2 JP 20899091 A JP20899091 A JP 20899091A JP 20899091 A JP20899091 A JP 20899091A JP 3028254 B2 JP3028254 B2 JP 3028254B2
- Authority
- JP
- Japan
- Prior art keywords
- organic solvent
- butylamine
- reprocessed
- detergent
- carbonate
- 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.)
- Expired - Fee Related
Links
- 239000003960 organic solvent Substances 0.000 title claims description 22
- 238000000034 method Methods 0.000 title claims description 19
- 238000012958 reprocessing Methods 0.000 title claims description 8
- HQABUPZFAYXKJW-UHFFFAOYSA-N butan-1-amine Chemical compound CCCCN HQABUPZFAYXKJW-UHFFFAOYSA-N 0.000 claims description 12
- 239000003153 chemical reaction reagent Substances 0.000 claims description 11
- 239000003758 nuclear fuel Substances 0.000 claims description 7
- STCOOQWBFONSKY-UHFFFAOYSA-N tributyl phosphate Chemical compound CCCCOP(=O)(OCCCC)OCCCC STCOOQWBFONSKY-UHFFFAOYSA-N 0.000 claims description 7
- 230000001172 regenerating effect Effects 0.000 claims description 5
- CDBYLPFSWZWCQE-UHFFFAOYSA-L Sodium Carbonate Chemical compound [Na+].[Na+].[O-]C([O-])=O CDBYLPFSWZWCQE-UHFFFAOYSA-L 0.000 description 12
- 239000003599 detergent Substances 0.000 description 12
- 239000012459 cleaning agent Substances 0.000 description 10
- MUBZPKHOEPUJKR-UHFFFAOYSA-N Oxalic acid Chemical compound OC(=O)C(O)=O MUBZPKHOEPUJKR-UHFFFAOYSA-N 0.000 description 9
- 238000004140 cleaning Methods 0.000 description 8
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 6
- OAKJQQAXSVQMHS-UHFFFAOYSA-N Hydrazine Chemical compound NN OAKJQQAXSVQMHS-UHFFFAOYSA-N 0.000 description 6
- 229910000029 sodium carbonate Inorganic materials 0.000 description 6
- 239000000243 solution Substances 0.000 description 5
- 238000012360 testing method Methods 0.000 description 5
- 238000005406 washing Methods 0.000 description 5
- 239000002699 waste material Substances 0.000 description 5
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 5
- GRYLNZFGIOXLOG-UHFFFAOYSA-N Nitric acid Chemical compound O[N+]([O-])=O GRYLNZFGIOXLOG-UHFFFAOYSA-N 0.000 description 4
- MTBCJQLXXMMYTI-UHFFFAOYSA-N butylazanium;hydrogen carbonate Chemical compound OC([O-])=O.CCCC[NH3+] MTBCJQLXXMMYTI-UHFFFAOYSA-N 0.000 description 4
- 229910017604 nitric acid Inorganic materials 0.000 description 4
- 239000002904 solvent Substances 0.000 description 4
- 229910052778 Plutonium Inorganic materials 0.000 description 3
- 229910052770 Uranium Inorganic materials 0.000 description 3
- 239000007864 aqueous solution Substances 0.000 description 3
- RGSUDMCOVHKEHB-UHFFFAOYSA-N butan-1-amine;oxalic acid Chemical compound CCCCN.OC(=O)C(O)=O RGSUDMCOVHKEHB-UHFFFAOYSA-N 0.000 description 3
- 239000001569 carbon dioxide Substances 0.000 description 3
- 229910002092 carbon dioxide Inorganic materials 0.000 description 3
- PTYMQUSHTAONGW-UHFFFAOYSA-N carbonic acid;hydrazine Chemical compound NN.OC(O)=O PTYMQUSHTAONGW-UHFFFAOYSA-N 0.000 description 3
- 239000012153 distilled water Substances 0.000 description 3
- 235000006408 oxalic acid Nutrition 0.000 description 3
- 239000000126 substance Substances 0.000 description 3
- BGNGWHSBYQYVRX-UHFFFAOYSA-N 4-(dimethylamino)benzaldehyde Chemical compound CN(C)C1=CC=C(C=O)C=C1 BGNGWHSBYQYVRX-UHFFFAOYSA-N 0.000 description 2
- BVKZGUZCCUSVTD-UHFFFAOYSA-L Carbonate Chemical compound [O-]C([O-])=O BVKZGUZCCUSVTD-UHFFFAOYSA-L 0.000 description 2
- NBIIXXVUZAFLBC-UHFFFAOYSA-N Phosphoric acid Chemical compound OP(O)(O)=O NBIIXXVUZAFLBC-UHFFFAOYSA-N 0.000 description 2
- 238000002144 chemical decomposition reaction Methods 0.000 description 2
- 238000000354 decomposition reaction Methods 0.000 description 2
- 238000013461 design Methods 0.000 description 2
- 238000002474 experimental method Methods 0.000 description 2
- 239000007789 gas Substances 0.000 description 2
- LOEUCBBZEHMJQN-UHFFFAOYSA-N hydrazine;oxalic acid Chemical compound NN.OC(=O)C(O)=O LOEUCBBZEHMJQN-UHFFFAOYSA-N 0.000 description 2
- 229910017464 nitrogen compound Inorganic materials 0.000 description 2
- 150000002830 nitrogen compounds Chemical class 0.000 description 2
- 238000002360 preparation method Methods 0.000 description 2
- 230000008929 regeneration Effects 0.000 description 2
- 238000011069 regeneration method Methods 0.000 description 2
- 229910001868 water Inorganic materials 0.000 description 2
- MGWGWNFMUOTEHG-UHFFFAOYSA-N 4-(3,5-dimethylphenyl)-1,3-thiazol-2-amine Chemical compound CC1=CC(C)=CC(C=2N=C(N)SC=2)=C1 MGWGWNFMUOTEHG-UHFFFAOYSA-N 0.000 description 1
- JYFHYPJRHGVZDY-UHFFFAOYSA-N Dibutyl phosphate Chemical compound CCCCOP(O)(=O)OCCCC JYFHYPJRHGVZDY-UHFFFAOYSA-N 0.000 description 1
- 229910000147 aluminium phosphate Inorganic materials 0.000 description 1
- BNMJSBUIDQYHIN-UHFFFAOYSA-N butyl dihydrogen phosphate Chemical compound CCCCOP(O)(O)=O BNMJSBUIDQYHIN-UHFFFAOYSA-N 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 238000005202 decontamination Methods 0.000 description 1
- 230000003588 decontaminative effect Effects 0.000 description 1
- 239000003085 diluting agent Substances 0.000 description 1
- SNRUBQQJIBEYMU-UHFFFAOYSA-N dodecane Chemical compound CCCCCCCCCCCC SNRUBQQJIBEYMU-UHFFFAOYSA-N 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 230000004992 fission Effects 0.000 description 1
- 238000011086 high cleaning Methods 0.000 description 1
- JUINSXZKUKVTMD-UHFFFAOYSA-N hydrogen azide Chemical compound N=[N+]=[N-] JUINSXZKUKVTMD-UHFFFAOYSA-N 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- VUZPPFZMUPKLLV-UHFFFAOYSA-N methane;hydrate Chemical compound C.O VUZPPFZMUPKLLV-UHFFFAOYSA-N 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 229940094933 n-dodecane Drugs 0.000 description 1
- JCXJVPUVTGWSNB-UHFFFAOYSA-N nitrogen dioxide Inorganic materials O=[N]=O JCXJVPUVTGWSNB-UHFFFAOYSA-N 0.000 description 1
- OYEHPCDNVJXUIW-UHFFFAOYSA-N plutonium atom Chemical compound [Pu] OYEHPCDNVJXUIW-UHFFFAOYSA-N 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
- 230000002285 radioactive effect Effects 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 102200052313 rs9282831 Human genes 0.000 description 1
- VSZWPYCFIRKVQL-UHFFFAOYSA-N selanylidenegallium;selenium Chemical compound [Se].[Se]=[Ga].[Se]=[Ga] VSZWPYCFIRKVQL-UHFFFAOYSA-N 0.000 description 1
- 159000000000 sodium salts Chemical class 0.000 description 1
- 239000002915 spent fuel radioactive waste Substances 0.000 description 1
- JFALSRSLKYAFGM-UHFFFAOYSA-N uranium(0) Chemical compound [U] JFALSRSLKYAFGM-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E30/00—Energy generation of nuclear origin
- Y02E30/30—Nuclear fission reactors
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W30/00—Technologies for solid waste management
- Y02W30/50—Reuse, recycling or recovery technologies
Description
【０００１】[0001]
【産業上の利用分野】本発明は再処理有機溶媒の再生方
法に関する。核燃料再処理プロセスにおいて使用される
リン酸トリブチル（ＴＢＰ）を主成分とする有機溶媒の
再生技術に利用できる。The present invention relates to a method for regenerating a reprocessed organic solvent. The present invention can be used for a regeneration technique of an organic solvent containing tributyl phosphate (TBP) as a main component used in a nuclear fuel reprocessing process.
【０００２】[0002]
【従来の技術】従来、核燃料の再処理プロセスにおいて
は、使用済み燃料を溶解した硝酸水溶液から６価のウラ
ン（Ｕ）と４価のプルトニウム（Ｐｕ）のみを抽出して
核分裂生成物（ＦＰ）を抽出しない化学的性質を有する
リン酸トリブチル（ＴＢＰ）とその希釈剤とから構成さ
れる有機溶媒が用いられている。この有機溶媒は、放射
性核種及び硝酸を含む溶液条件下で長期間使用される間
に、放射性分解、又は化学分解し、リン酸ジブチル（Ｈ
ＤＢＰ）或いはリン酸モノブチル（Ｈ２ＭＢＰ）などの
様々な有機物を生成する。ＨＤＢＰなどの有機物は、
Ｕ、Ｐｕ及びＦＰと化学的に安定な錯体化合物を形成
し、Ｕ及びＰｕの回収率の低下やＦＰの除染性能の低下
などのプロセス的な影響を及ぼす。2. Description of the Related Art Conventionally, in a reprocessing process of nuclear fuel, only hexavalent uranium (U) and tetravalent plutonium (Pu) are extracted from an aqueous nitric acid solution in which spent fuel is dissolved to obtain fission products (FP). An organic solvent composed of tributyl phosphate (TBP), which has a chemical property that does not extract water, and its diluent is used. This organic solvent undergoes radioactive or chemical decomposition during prolonged use under solution conditions containing a radionuclide and nitric acid, resulting in dibutyl phosphate (H
DBP), or to produce a variety of organic substances such as monobutyl phosphate (H 2 MBP). Organic substances such as HDBP
It forms a chemically stable complex compound with U, Pu, and FP, and has process effects such as a decrease in the recovery rate of U and Pu and a decrease in the decontamination performance of FP.
【０００３】そのため核燃料再処理プロセスにおいて
は、劣化した有機溶媒からＨＤＢＰなどの分解生成物や
それらと錯体化しているＦＰなどを除去し、抽出溶媒と
して再生するために溶媒洗浄処理を行っている。そし
て、この溶媒洗浄剤にはアルカリ性の試薬が用いられて
いる。[0003] Therefore, in the nuclear fuel reprocessing process, a solvent washing treatment is performed to remove decomposition products such as HDBP and FP complexed with them from the deteriorated organic solvent and regenerate it as an extraction solvent. Then, an alkaline reagent is used for the solvent cleaning agent.
【０００４】従来、有機溶媒の洗浄剤として用いられる
アルカリ性試薬には、炭酸ナトリウム、炭酸ヒドラジン
及びシュウ酸ヒドラジンなどがある。しかし、これらの
試薬を用いる方法には、以下に示すような問題がある。
炭酸ナトリウムを用いる方法は、最終的にナトリウム塩
の二次廃棄物が大量に発生するため廃棄物処理処分上の
負担が大きい。また、ヒドラジン系試薬を用いる方法
は、使用後のヒドラジン含有廃液を分解処理する際にア
ジ化水素などが発生するため十分な安全設計が必要とな
る。Conventionally, alkaline reagents used as detergents for organic solvents include sodium carbonate, hydrazine carbonate and hydrazine oxalate. However, the method using these reagents has the following problems.
In the method using sodium carbonate, a large amount of secondary waste of sodium salt is finally generated, so that the burden on waste disposal is large. In the method using a hydrazine-based reagent, a sufficient safety design is required because hydrogen azide and the like are generated when a hydrazine-containing waste liquid after use is decomposed.
【０００５】上記のように、従来の洗浄剤を用いる方法
には、（１）洗浄剤の使用にともない二次廃棄物が発生
すること、また（２）洗浄剤を分解する際に不安定な窒
素化合物が生成するので十分な安全設計が必要であるこ
となどの問題がある。[0005] As described above, the conventional methods using a cleaning agent include (1) the generation of secondary waste due to the use of the cleaning agent, and (2) the unstableness of decomposing the cleaning agent. Since nitrogen compounds are generated, there is a problem that a sufficient safety design is required.
【０００６】[0006]
【発明が解決しようとする問題点】本発明の目的は、こ
のような問題点のない再処理有機溶媒の再生方法を提供
することにある。SUMMARY OF THE INVENTION An object of the present invention is to provide a method for regenerating a reprocessed organic solvent which does not have such problems.
【０００７】[0007]
【問題点を解決するための手段】本願発明者は、この目
的達成のため鋭意研究の結果、ブチルアミン系試薬は、
Ｎ＝Ｎ結合を有しないため、不安定な窒素化合物を生成
することなく、二酸化窒素、二酸化炭素と水に分解する
ことが可能であることに想到し、核燃料再処理プロセス
において使用されるリン酸トリブチルを主成分とする有
機溶媒の再生において、ブチルアミン系の試薬を用いて
洗浄することを特徴とする再処理有機溶媒の再生方法を
発明するに到った。[Means for Solving the Problems] The inventors of the present invention have made intensive studies to achieve this object, and as a result,
Having no N = N bonds, they conceived that they could be decomposed into nitrogen dioxide, carbon dioxide and water without producing unstable nitrogen compounds, and phosphoric acid used in the nuclear fuel reprocessing process In the regeneration of an organic solvent containing tributyl as a main component, a method for regenerating a reprocessed organic solvent, which comprises washing with a butylamine-based reagent, has been invented.
【０００８】すなわち、本発明の方法は、ブチルアミン
系試薬（炭酸ブチルアミン、シュウ酸ブチルアミン）を
用いることによって、核燃料再処理プロセスにおいて使
用されるリン酸トリブチルを主成分とする有機溶媒を洗
浄し再生する方法である。That is, the method of the present invention uses a butylamine-based reagent (butylamine carbonate, butylamine oxalate) to wash and regenerate the tributyl phosphate-based organic solvent used in the nuclear fuel reprocessing process. Is the way.
【０００９】[0009]
【実施例】本発明を実施例に依って具体的に説明する。 模擬劣化有機溶媒の洗浄実験 （１）模擬劣化有機溶媒の作成 ジルコニウム（Ｚｒ）を含む有機溶媒（３０％ＴＢＰ／
ｎ−ドデカン）と同容量の３Ｍ硝酸とを混合し攪拌した
状態でコバルト−６０γ線源を１０７Ｒの照射量まで外
部照射した。照射後、硝酸水溶液を分離した有機溶媒を
模擬劣化有機溶媒とした。EXAMPLES The present invention will be specifically described with reference to examples. Washing test of simulated deteriorated organic solvent (1) Preparation of simulated deteriorated organic solvent Organic solvent containing zirconium (Zr) (30% TBP /
n-Dodecane) and the same volume of 3M nitric acid were mixed, and the mixture was stirred and externally irradiated with a cobalt-60γ-ray source to a dose of 10 7 R. After the irradiation, the organic solvent from which the nitric acid aqueous solution was separated was used as a simulated deteriorated organic solvent.
【００１０】（２）溶媒洗浄剤の作成 ブチルアミン系洗浄剤の他に比較のためにヒドラジン系
洗浄剤と炭酸ナトリウム洗浄剤についても洗浄実験を行
った。 （ａ）炭酸ブチルアミン洗浄剤 所定量のｎ−ブチルアミン試薬を蒸留水に溶解した後、
炭酸ガスを十分吸収させ作成した。 （ｂ）シュウ酸ブチルアミン洗浄剤 所定量のｎ−ブチルアミン試薬をシュウ酸水溶液に溶解
させ作成した。 （ｃ）炭酸ヒドラジン洗浄剤 所定量のヒドラジン試薬を蒸留水に溶解した後、炭酸ガ
スを十分吸収させ作成した。 （ｄ）シュウ酸ヒドラジン洗浄剤 所定量のヒドラジン試薬をシュウ酸水溶液に溶解させ作
成した。 （ｅ）炭酸ナトリウム洗浄剤 所定量の炭酸ナトリウムを蒸留水に溶解し作成した。 なお、各試薬の洗浄剤中の濃度は１．０Ｍとした。(2) Preparation of Solvent Detergent In addition to the butylamine-based detergent, a hydrazine-based detergent and a sodium carbonate detergent were also subjected to washing experiments for comparison. (A) Butylamine carbonate detergent After dissolving a predetermined amount of n-butylamine reagent in distilled water,
It was made by absorbing carbon dioxide gas enough. (B) Butylamine oxalate detergent A predetermined amount of an n-butylamine reagent was dissolved in an oxalic acid aqueous solution to prepare a solution. (C) Hydrazine carbonate detergent A predetermined amount of a hydrazine reagent was dissolved in distilled water, and then carbon dioxide gas was sufficiently absorbed to prepare the solution. (D) Hydrazine oxalate detergent A predetermined amount of a hydrazine reagent was dissolved in an oxalic acid aqueous solution to prepare a solution. (E) Sodium carbonate detergent A predetermined amount of sodium carbonate was dissolved in distilled water to prepare. The concentration of each reagent in the detergent was 1.0 M.
【００１１】（３）洗浄実験方法 作成した模擬劣化有機溶媒に同容量の洗浄剤を添加し、
１分間振とうした。振とう後、静置し有機溶媒中のＨＤ
ＢＰ及びＺｒの濃度を分析した。(3) Cleaning experiment method The same volume of the cleaning agent is added to the created simulated deteriorated organic solvent,
Shake for 1 minute. After shaking, leave still in HD in organic solvent
The concentrations of BP and Zr were analyzed.
【００１２】（４）洗浄試験結果 洗浄試験の結果は表１に示すごとくであった。(4) Results of cleaning test The results of the cleaning test were as shown in Table 1.
【表１】 [Table 1]
【００１３】表１から、ＨＤＢＰの洗浄試験結果におい
ては、炭酸ブチルアミン、炭酸ナトリウムおよび炭酸ヒ
ドラジンの炭酸系洗浄剤では９０％以上のＨＤＢＰの洗
浄率が得られており、シュウ酸系の洗浄剤に比べ炭酸系
の洗浄剤の方が優れていることが分かる。From Table 1, it can be seen from the cleaning test results of HDBP that the cleaning rate of HDBP of 90% or more was obtained with the carbonate-based cleaning agents of butylamine carbonate, sodium carbonate and hydrazine carbonate, and that the oxalic acid-based cleaning agent exhibited a cleaning rate of 90% or more. It can be seen that the carbonate-based cleaning agent is superior.
【００１４】また、Ｚｒの洗浄試験結果においては、洗
浄剤の種類による洗浄性能の差はほとんどなく、各洗浄
剤とも９９．９％以上の高い洗浄率が得られている。こ
れらの結果は、放射線分解及び化学分解により劣化した
有機溶媒を洗浄し再生する試薬として、炭酸ブチルアミ
ンやシュウ酸ブチルアミンなどのブチルアミン系洗浄剤
が有効であることを示している。In Zr cleaning test results, there is almost no difference in cleaning performance depending on the type of cleaning agent, and each cleaning agent has a high cleaning rate of 99.9% or more. These results indicate that a butylamine-based detergent such as butylamine carbonate or butylamine oxalate is effective as a reagent for washing and regenerating an organic solvent degraded by radiation decomposition and chemical decomposition.
【００１５】[0015]
【発明の効果】本発明によれば、核燃料再処理工程にお
いて二次廃棄物の発生を伴わず、また工程安全性にも優
れた有機溶媒の再生が可能となる。According to the present invention, it is possible to regenerate an organic solvent which does not involve secondary waste in the nuclear fuel reprocessing step and has excellent process safety.
───────────────────────────────────────────────────── フロントページの続き (56)参考文献 特開 平２−49195（ＪＰ，Ａ) (58)調査した分野(Int.Cl.7，ＤＢ名) G21C 19/46 ──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-2-49195 (JP, A) (58) Fields investigated (Int. Cl. 7 , DB name) G21C 19/46
Claims (1)
リン酸トリブチルを主成分とする有機溶媒の再生におい
て、ブチルアミン系の試薬を用いて洗浄することを特徴
とする再処理有機溶媒の再生方法。1. A method for regenerating an organic solvent containing tributyl phosphate as a main component, which is used in a nuclear fuel reprocessing process, wherein the organic solvent is washed with a butylamine-based reagent.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP20899091A JP3028254B2 (en) | 1991-05-17 | 1991-05-17 | Reprocessing method of reprocessed organic solvent |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP20899091A JP3028254B2 (en) | 1991-05-17 | 1991-05-17 | Reprocessing method of reprocessed organic solvent |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH05119186A JPH05119186A (en) | 1993-05-18 |
| JP3028254B2 true JP3028254B2 (en) | 2000-04-04 |
Family
ID=16565503
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP20899091A Expired - Fee Related JP3028254B2 (en) | 1991-05-17 | 1991-05-17 | Reprocessing method of reprocessed organic solvent |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3028254B2 (en) |
-
1991
- 1991-05-17 JP JP20899091A patent/JP3028254B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH05119186A (en) | 1993-05-18 |
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