JP2011005444A - Filtering material - Google Patents

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JP2011005444A
JP2011005444A JP2009152778A JP2009152778A JP2011005444A JP 2011005444 A JP2011005444 A JP 2011005444A JP 2009152778 A JP2009152778 A JP 2009152778A JP 2009152778 A JP2009152778 A JP 2009152778A JP 2011005444 A JP2011005444 A JP 2011005444A
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glass
molten salt
chloride
metal oxide
filtering material
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Naoki Mitamura
直樹 三田村
Tatsuya Tsuzuki
都築　　達也
Ippei Amamoto
一平 天本
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Central Glass Co Ltd
Japan Atomic Energy Agency
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Central Glass Co Ltd
Japan Atomic Energy Agency
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Priority to JP2009152778A priority Critical patent/JP2011005444A/en
Priority to PCT/JP2010/060665 priority patent/WO2010150823A1/en
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    • G—PHYSICS
    • G21—NUCLEAR PHYSICS; NUCLEAR ENGINEERING
    • G21F—PROTECTION AGAINST X-RADIATION, GAMMA RADIATION, CORPUSCULAR RADIATION OR PARTICLE BOMBARDMENT; TREATING RADIOACTIVELY CONTAMINATED MATERIAL; DECONTAMINATION ARRANGEMENTS THEREFOR
    • G21F9/00—Treating radioactively contaminated material; Decontamination arrangements therefor
    • G21F9/28—Treating solids
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D39/00—Filtering material for liquid or gaseous fluids
    • B01D39/14—Other self-supporting filtering material ; Other filtering material
    • B01D39/20—Other self-supporting filtering material ; Other filtering material of inorganic material, e.g. asbestos paper, metallic filtering material of non-woven wires
    • B01D39/2003—Glass or glassy material
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D39/00—Filtering material for liquid or gaseous fluids
    • B01D39/14—Other self-supporting filtering material ; Other filtering material
    • B01D39/20—Other self-supporting filtering material ; Other filtering material of inorganic material, e.g. asbestos paper, metallic filtering material of non-woven wires
    • B01D39/2068—Other inorganic materials, e.g. ceramics
    • C—CHEMISTRY; METALLURGY
    • C03—GLASS; MINERAL OR SLAG WOOL
    • C03C—CHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS
    • C03C10/00—Devitrified glass ceramics, i.e. glass ceramics having a crystalline phase dispersed in a glassy phase and constituting at least 50% by weight of the total composition
    • C—CHEMISTRY; METALLURGY
    • C03—GLASS; MINERAL OR SLAG WOOL
    • C03C—CHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS
    • C03C11/00—Multi-cellular glass ; Porous or hollow glass or glass particles
    • C—CHEMISTRY; METALLURGY
    • C03—GLASS; MINERAL OR SLAG WOOL
    • C03C—CHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS
    • C03C3/00—Glass compositions
    • C03C3/12—Silica-free oxide glass compositions
    • C03C3/16—Silica-free oxide glass compositions containing phosphorus
    • C—CHEMISTRY; METALLURGY
    • C03—GLASS; MINERAL OR SLAG WOOL
    • C03C—CHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS
    • C03C3/00—Glass compositions
    • C03C3/12—Silica-free oxide glass compositions
    • C03C3/16—Silica-free oxide glass compositions containing phosphorus
    • C03C3/17—Silica-free oxide glass compositions containing phosphorus containing aluminium or beryllium
    • C—CHEMISTRY; METALLURGY
    • C03—GLASS; MINERAL OR SLAG WOOL
    • C03C—CHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS
    • C03C3/00—Glass compositions
    • C03C3/12—Silica-free oxide glass compositions
    • C03C3/16—Silica-free oxide glass compositions containing phosphorus
    • C03C3/21—Silica-free oxide glass compositions containing phosphorus containing titanium, zirconium, vanadium, tungsten or molybdenum
    • G—PHYSICS
    • G21—NUCLEAR PHYSICS; NUCLEAR ENGINEERING
    • G21F—PROTECTION AGAINST X-RADIATION, GAMMA RADIATION, CORPUSCULAR RADIATION OR PARTICLE BOMBARDMENT; TREATING RADIOACTIVELY CONTAMINATED MATERIAL; DECONTAMINATION ARRANGEMENTS THEREFOR
    • G21F9/00—Treating radioactively contaminated material; Decontamination arrangements therefor
    • G21F9/04—Treating liquids
    • G21F9/06—Processing
    • G—PHYSICS
    • G21—NUCLEAR PHYSICS; NUCLEAR ENGINEERING
    • G21F—PROTECTION AGAINST X-RADIATION, GAMMA RADIATION, CORPUSCULAR RADIATION OR PARTICLE BOMBARDMENT; TREATING RADIOACTIVELY CONTAMINATED MATERIAL; DECONTAMINATION ARRANGEMENTS THEREFOR
    • G21F9/00—Treating radioactively contaminated material; Decontamination arrangements therefor
    • G21F9/28—Treating solids
    • G21F9/30—Processing

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Materials Engineering (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Organic Chemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • High Energy & Nuclear Physics (AREA)
  • Physics & Mathematics (AREA)
  • General Engineering & Computer Science (AREA)
  • Geology (AREA)
  • Ceramic Engineering (AREA)
  • Inorganic Chemistry (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Dispersion Chemistry (AREA)
  • Glass Compositions (AREA)
  • Filtering Materials (AREA)

Abstract

PROBLEM TO BE SOLVED: To provide a filtering material which does not react with a chloride-based fused salt and filters precipitates.SOLUTION: The filtering material includes glass or crystallized glass which hardly reacts a chloride-based fused salt. In the glass composition, POis 30-80, FeOis 0-50, AlOis 0-30, TiOis 0-35 and ZrOis 0-5 in terms of mol%. In addition, the filtering material does not substantially contain alkaline metal oxide and alkaline earth metal oxide, and glass, which is a precursor of the glass and crystallized glass, has its softening point of 450°C or higher.

Description

本発明は、塩化物系の溶融塩と反応し難く、溶融塩中の沈殿物の濾過に適した濾過材料に関するものである。   The present invention relates to a filtration material that is difficult to react with a chloride-based molten salt and is suitable for filtering a precipitate in the molten salt.

塩化物系溶融塩を用いた溶融塩電解法は、現在、様々な分野で利用されている。例えば、使用済核燃料の乾式再処理工程は、溶媒中である塩化物系の高温溶融塩に使用済燃料を溶解し、電解処理することで陰極上に析出する電解析出物を回収し、再処理している。使用済電解質融液には、白金族元素のように溶融塩に溶け込まずに沈殿する核***生成物が存在する（例えば、非特許文献１）。また、電解により分離不可能な核***生成物は、リン酸塩に転換することにより沈殿除去することも検討されている。（例えば、非特許文献２または特許文献１参照）。   The molten salt electrolysis method using a chloride-based molten salt is currently used in various fields. For example, in the dry reprocessing step of spent nuclear fuel, the spent fuel is dissolved in a chloride-based high-temperature molten salt in a solvent, and electrolytic deposits deposited on the cathode are recovered by electrolytic treatment. Processing. In the spent electrolyte melt, there exists a fission product that precipitates without being dissolved in a molten salt, such as a platinum group element (for example, Non-Patent Document 1). It has also been studied to remove fission products that cannot be separated by electrolysis by converting them into phosphate. (For example, refer nonpatent literature 2 or patent literature 1).

沈殿は濾過により除去出来るが、用いる濾過材は溶融塩と反応せずに、形状を維持出来る材質が必須である。また、上記のような核***生成物を含有する沈殿物は、ガラス固化により安定化されるが、濾過材もまた、核***生成物が付着しているため、固化が必要である。特許文献１では、安定化に鉄リン酸ガラスへの沈殿物の充填を検討しているが、濾過材の材質によっては、安定なガラスを形成しないため、濾過材の検討が課題となっている。   The precipitate can be removed by filtration, but the filter medium to be used must be a material that can maintain its shape without reacting with the molten salt. In addition, the precipitate containing the fission product as described above is stabilized by vitrification, but the filter medium also needs to be solidified because the fission product is attached. In patent document 1, although the filling of the precipitate to iron phosphate glass is examined for stabilization, since stable glass is not formed depending on the material of a filter medium, examination of a filter medium is a subject. .

特開２００７−３０３９３４号公報JP 2007-303934 A

「リン酸系ガラスによる放射性廃棄物固化技術」天本一平、明珍宗孝、福井寿樹、Ｎｅｗ ＧＬＡＳＳ、Ｖｏｌ．２２、Ｎｏ．２、２００７、ｐ２２"Radioactive waste solidification technology using phosphate glass" Ippei Amamoto, Munetaka Meijin, Toshiki Fukui, New GLASS, Vol. 22, no. 2, 2007, p22 「乾式再処理から発生する廃溶融塩の固化技術の開発」豊原尚美 他、日本原子力学会和文論文誌、Ｖｏｌ．１、Ｎｏ．４、２００２、ｐ４２０“Development of solidification technology of waste molten salt generated by dry reprocessing” Naomi Toyohara et al., Japanese Journal of Atomic Energy Society, Vol. 1, no. 4, 2002, p420

本発明の目的は、塩化物系の溶融塩と反応し難く、溶融塩中の沈殿物の濾過に適しており、また、上記問題を解決するために、材質がリン酸系ガラスからなる濾過材料を提供することである。   An object of the present invention is that it is difficult to react with a chloride-based molten salt and is suitable for filtration of precipitates in the molten salt, and in order to solve the above problems, a filtering material made of phosphate glass Is to provide.

本発明の目的は、塩化物系の溶融塩と反応し難く、溶融塩中の沈殿物の濾過に適しており、また、上記問題を解決するために、材質がリン酸系ガラスからなる濾過材料を提供することである。   An object of the present invention is that it is difficult to react with a chloride-based molten salt and is suitable for filtration of precipitates in the molten salt, and in order to solve the above problems, a filtering material made of phosphate glass Is to provide.

また、モル％で表して、Ｐ２Ｏ５が３０〜８０、Ｆｅ２Ｏ３が０〜５０、Ａｌ２Ｏ３が０〜３０、ＴｉＯ２が０〜３５、ＺｒＯ２が０〜１０からなるＰ２Ｏ５系ガラス、または結晶化ガラスであることを特徴とする、上記の濾過材料である。 Also, expressed in terms of mole%, P 2 O 5 is 30 to 80, Fe 2 O 3 is 0 to 50, Al 2 O 3 is 0 to 30, TiO 2 is 0 to 35, ZrO 2 consists of 0-10 characterized in that it is a P 2 O 5 based glass or crystallized glass, and the above-mentioned filtration material.

また、実質的にアルカリ金属酸化物及びアルカリ土類金属酸化物を含有しないガラス及び結晶化ガラスであることを特徴とする上記の濾過材料である。   In addition, the filtration material is characterized by being a glass and a crystallized glass substantially free of alkali metal oxide and alkaline earth metal oxide.

さらに、ガラス及び結晶化ガラスの前駆体であるガラスの軟化点が４５０℃以上であることを特徴とする、上記の濾過材料である。   Furthermore, the softening point of glass which is a precursor of glass and crystallized glass is 450 ° C. or higher.

本発明により、塩化物系の溶融塩と反応せずに沈殿物を濾過することができ、例えば、溶融塩が電解質融液の場合は電解質融液の再生が可能となり、環境及び経済面での負荷を低減することが出来る。   According to the present invention, a precipitate can be filtered without reacting with a chloride-based molten salt. For example, when the molten salt is an electrolyte melt, the electrolyte melt can be regenerated. The load can be reduced.

本発明は前記問題点を考慮し、塩化物系混合溶融塩と反応し難いことを特徴とする濾過材料でありＰ２Ｏ５系のガラス、または結晶化ガラスからなる。 In consideration of the above-mentioned problems, the present invention is a filtering material characterized in that it hardly reacts with a chloride-based mixed molten salt, and is made of P 2 O 5 -based glass or crystallized glass.

本発明の成分系においてＰ２Ｏ５はガラスの主成分であり、ガラス溶融を容易とするための必須成分である。ガラス中にモル％で３０〜８０％の範囲で含有させることが望ましい。３０％未満では上記作用を発揮しえずかつガラス化が困難となり、８０％を超えるとガラスの耐湿性が悪くなる。より好ましくは４０〜７０％の範囲である。 In the component system of the present invention, P 2 O 5 is a main component of glass and is an essential component for facilitating glass melting. It is desirable to make it contain in the range of 30-80% by mol% in glass. If it is less than 30%, the above action cannot be exhibited and vitrification becomes difficult, and if it exceeds 80%, the moisture resistance of the glass is deteriorated. More preferably, it is 40 to 70% of range.

Ｆｅ２Ｏ３は、Ｐ２Ｏ５系ガラスで問題となる吸湿性を改善し、ガラスを安定化させる成分である。ガラス中にモル％で０〜５０％の範囲で含有させることが望ましい。５０％を超えるとガラス化しなくなる。より好ましくは０〜４５％の範囲である。 Fe 2 O 3 is a component that improves hygroscopicity, which is a problem with P 2 O 5 glass, and stabilizes the glass. It is desirable to make it contain in the range of 0-50% by mol% in glass. If it exceeds 50%, it will not vitrify. More preferably, it is 0 to 45% of range.

Ａｌ２Ｏ３は溶融塩との反応を抑制し、ガラス作製の際に結晶化を抑制して安定化させる成分である。ガラス中にモル％で０〜３０％の範囲で含有させることが好ましい。３０％を超えるとガラス化しなくなる。好ましくは０〜２５％、より好ましくは０〜２０％の範囲である。 Al 2 O 3 is a component that suppresses the reaction with the molten salt and stabilizes by suppressing crystallization during glass production. It is preferable to make it contain in the range of 0-30% by mol% in glass. If it exceeds 30%, it will not vitrify. Preferably it is 0 to 25%, more preferably 0 to 20% of range.

ＴｉＯ２はガラスの耐熱性を向上させ、またＡｌ２Ｏ３と同様に溶融塩との反応を抑制する成分である。ガラス中にモル％で０〜３５％の範囲で含有させることが好ましい。３５％を超えるとガラス化が困難となる。より好ましくは０〜３０％の範囲である。 TiO 2 is a component that improves the heat resistance of the glass and suppresses the reaction with the molten salt in the same manner as Al 2 O 3 . It is preferable to make it contain in the range of 0-35% by mol% in glass. If it exceeds 35%, vitrification becomes difficult. More preferably, it is 0 to 30% of range.

ＺｒＯ２はガラスの耐熱性を向上させ、またＡｌ２Ｏ３と同様に溶融塩との反応を抑制する成分である。ガラス中にモル％で０〜１０％の範囲で含有させることが好ましい。１０％を超えるとガラス化が困難となる。より好ましくは０〜８％の範囲である。 ZrO 2 is a component that improves the heat resistance of the glass and suppresses the reaction with the molten salt in the same manner as Al 2 O 3 . It is preferable to make it contain in the range of 0-10% by mol% in glass. If it exceeds 10%, vitrification becomes difficult. More preferably, it is 0 to 8% of range.

この他にも、一般的な酸化物で表すＩｎ２Ｏ３、Ｖ２Ｏ5、ＳｎＯ２、ＴｅＯ２など、あるいはＦ２やＣｌ２などを上記性質を損なわない範囲で３％まで加えてもよい。３％を超えると、溶融塩との反応がし易くなり、ガラスの性質及び形状を維持出来なくなる。 In addition, In 2 O 3 , V 2 O 5 , SnO 2 , TeO 2 or the like represented by a general oxide, or F 2 or Cl 2 may be added up to 3% within a range that does not impair the above properties. Good. If it exceeds 3%, the reaction with the molten salt is likely to occur, and the properties and shape of the glass cannot be maintained.

実質的にアルカリ金属酸化物やアルカリ土類金属酸化物を含まないことにより、溶融塩との反応を皆無とすることができる。ここで、実質的にアルカリ金属酸化物やアルカリ土類金属酸化物を含まないとは、ガラス原料中に不純物として混入する程度の量を意味する。例えば、ガラス中における１質量％以下の範囲であれば、溶融塩との反応に与える影響は殆どない。   By containing substantially no alkali metal oxide or alkaline earth metal oxide, reaction with the molten salt can be eliminated. Here, the phrase “substantially free of alkali metal oxide or alkaline earth metal oxide” means an amount to be mixed as an impurity in the glass raw material. For example, if it is in the range of 1% by mass or less in the glass, there is almost no influence on the reaction with the molten salt.

上記成分系において、塩化物系溶融塩に耐性があれば、ガラスあるいは結晶化ガラスのどちらでも構わない。   In the above component system, any glass or crystallized glass may be used as long as it is resistant to the chloride-based molten salt.

また、ガラス及び結晶化ガラスの前駆体ガラスの軟化点が４５０℃以上であることを特徴とする収着材料である。軟化点が４５０℃未満であると、電解質融液の溶融温度に耐えられなくなり、形状を維持出来なくなる。   The sorption material is characterized in that the glass and crystallized glass precursor glass has a softening point of 450 ° C. or higher. When the softening point is less than 450 ° C., it cannot withstand the melting temperature of the electrolyte melt, and the shape cannot be maintained.

本発明の濾過材料は特に形状を問わないが、濾過性能を上げるために粉末状、繊維状、あるいは多孔質にすることが好ましい。
本発明の濾過材料は、塩化物系電解質融液の溶融塩に効果を示す。ただし、塩化物系電解質融液は、リン酸塩等の他の塩を含有しても良い。 The filter material of the present invention is not particularly limited in shape, but is preferably powdery, fibrous, or porous in order to improve the filtration performance.
The filtration material of the present invention is effective for a molten salt of a chloride electrolyte melt. However, the chloride electrolyte melt may contain other salts such as phosphates.

以下、実施例に基づき、説明する。   Hereinafter, a description will be given based on examples.

Ｐ２Ｏ５源として正リン酸を、Ｆｅ２Ｏ３源として酸化鉄を、Ａｌ２Ｏ３源として酸化アルミニウムを、ＴｉＯ２源として酸化チタンを、ＺｒＯ２源として酸化ジルコニウムを、Ｋ２Ｏ源として炭酸カリウムを、ＣａＯ源として炭酸カルシウムを、ＢａＯ源として炭酸バリウムを使用し、これらを表の組成となるべく調合したうえで、白金ルツボに投入し、電気加熱炉内で１１００〜１３００℃、１〜３時間加熱溶融した。溶融ガラスを鋳型に流し込み、ブロック状とし、ガラス転移点以上に保持した電気炉内に移入して徐冷し、表１の実施例１〜５、表２の比較例１〜３に示す組成のガラスを得た。 Orthophosphoric acid as the P 2 O 5 source, iron oxide as the Fe 2 O 3 source, aluminum oxide as the Al 2 O 3 source, titanium oxide as the TiO 2 source, zirconium oxide as the ZrO 2 source, K 2 O Potassium carbonate is used as a source, calcium carbonate is used as a CaO source, barium carbonate is used as a BaO source, and these are prepared to the composition shown in the table, and then put into a platinum crucible, and 1100 to 1300 ° C. in an electric heating furnace, It was heated and melted for 1 to 3 hours. The molten glass is poured into a mold, made into a block shape, transferred into an electric furnace held above the glass transition point, and gradually cooled, and the compositions shown in Examples 1 to 5 in Table 1 and Comparative Examples 1 to 3 in Table 2 are used. Glass was obtained.

このようにして作製した各試料について、軟化点、溶融塩への耐性を評価した。   Each sample thus produced was evaluated for softening point and resistance to molten salt.

軟化点は、熱分析装置ＴＧ―ＤＴＡ（リガク（株）製）を用いて測定した。塩化物系溶融塩への耐性評価は、ＬｉＣｌ−ＫＣｌ―ＣｓＣｌ混合塩を、乾燥した大気中５００℃で加熱することで溶融塩とし、上記ガラス試料をその溶融塩に５時間浸漬し、溶融塩への耐性を評価した。   The softening point was measured using a thermal analyzer TG-DTA (manufactured by Rigaku Corporation). To evaluate the resistance to chloride-based molten salt, LiCl-KCl-CsCl mixed salt was heated to 500 ° C. in a dry atmosphere to form molten salt, and the glass sample was immersed in the molten salt for 5 hours. The resistance to was evaluated.

（結果） 組成および、各種試験結果を表に示す。   (Results) The composition and various test results are shown in the table.

表から明らかなように、実施例１〜５の各試料は、各組成が適切な範囲であるため、安定なガラスが得られ、また軟化点も所望の範囲に入っていた。塩化物系溶融塩へ浸漬後も、ガラス質及び形状を維持しており、耐性が有る。   As is apparent from the table, each sample of Examples 1 to 5 had an appropriate composition range, so that a stable glass was obtained and the softening point was within the desired range. Even after being immersed in a chloride-based molten salt, it maintains its vitreousness and shape and is resistant.

これらに対して、比較例１〜３の試料は、軟化点は所望の値が得られたものの、組成範囲が適切ではなく、アルカリ金属酸化物もしくはアルカリ土類酸化物を含んでいるため、溶融塩と反応し、結晶化もしくは形状が維持出来ずに溶解しており、溶融塩への耐性は得られなかった。   On the other hand, the samples of Comparative Examples 1 to 3, although the desired softening point was obtained, the composition range was not appropriate, and it contained an alkali metal oxide or an alkaline earth oxide, so it melted. It reacted with the salt and dissolved without being crystallized or maintained in shape, and resistance to molten salt was not obtained.

Claims (4)

塩化物系の溶融塩と反応し難いガラス、または結晶化ガラスであることを特徴とする濾過材料。 A filtering material, which is a glass or a crystallized glass that hardly reacts with a chloride-based molten salt. モル％で表して、
Ｐ２Ｏ５が３０〜８０、
Ｆｅ２Ｏ３が０〜５０、
Ａｌ２Ｏ３が０〜３０、
ＴｉＯ２が０〜３５、
ＺｒＯ２が０〜１０、
からなるガラス、または結晶化ガラスであることを特徴とする請求項１に記載の濾過材料。 Expressed in mol%
P 2 O 5 is 30 to 80,
Fe 2 O 3 is 0-50,
Al 2 O 3 is 0-30,
TiO 2 is 0 to 35,
ZrO 2 is 0 to 10,
The filter material according to claim 1, wherein the filter material is a glass made of or crystallized glass. 実質的にアルカリ金属酸化物及びアルカリ土類金属酸化物を含有しない請求項１または２に記載の濾過材料。 The filtration material according to claim 1 or 2, which contains substantially no alkali metal oxide or alkaline earth metal oxide. 前記ガラス及び結晶化ガラスの前駆体であるガラスの軟化点が４５０℃以上であることを特徴とする請求項１乃至３のいずれか一項に記載の収着濾過材料。 The sorption filtration material according to any one of claims 1 to 3, wherein a softening point of glass which is a precursor of the glass and crystallized glass is 450 ° C or higher.
JP2009152778A 2009-06-26 2009-06-26 Filtering material Pending JP2011005444A (en)

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JP2011203029A (en) * 2010-03-25 2011-10-13 Hitachi-Ge Nuclear Energy Ltd Method of processing fluoride compound
JP2012013441A (en) * 2010-06-29 2012-01-19 Central Glass Co Ltd Separating material for nuclear fission product, manufacturing method thereof, and method for separating nuclear fission product using the separating material

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JP5137043B2 (en) * 2011-03-04 2013-02-06 セントラル硝子株式会社 Sorption material

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JPS59123529A (en) * 1982-12-28 1984-07-17 Toshiba Corp Production of infrared transmittable material
JPS6059027A (en) * 1983-08-16 1985-04-05 アルカン・インターナシヨナル・リミテツド Removal of foreign matters from molten metal
JPH06145777A (en) * 1992-11-09 1994-05-27 Honda Motor Co Ltd Method for removing sludge in fused salt solution and device therefor
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JP2011112483A (en) * 2009-11-26 2011-06-09 Japan Atomic Energy Agency Material for filtering and adsorbing fission product and method using the same to filter and adsorb fission product
JP2011203029A (en) * 2010-03-25 2011-10-13 Hitachi-Ge Nuclear Energy Ltd Method of processing fluoride compound
JP2012013441A (en) * 2010-06-29 2012-01-19 Central Glass Co Ltd Separating material for nuclear fission product, manufacturing method thereof, and method for separating nuclear fission product using the separating material

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