WO2012101868A1 - 使用済み研磨材スラリーから研磨材成分を回収する方法及び当該方法により回収された酸化セリウム - Google Patents
使用済み研磨材スラリーから研磨材成分を回収する方法及び当該方法により回収された酸化セリウム Download PDFInfo
- Publication number
- WO2012101868A1 WO2012101868A1 PCT/JP2011/072476 JP2011072476W WO2012101868A1 WO 2012101868 A1 WO2012101868 A1 WO 2012101868A1 JP 2011072476 W JP2011072476 W JP 2011072476W WO 2012101868 A1 WO2012101868 A1 WO 2012101868A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- abrasive
- component
- slurry
- cerium oxide
- abrasive material
- Prior art date
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
- B24B57/00—Devices for feeding, applying, grading or recovering grinding, polishing or lapping agents
- B24B57/02—Devices for feeding, applying, grading or recovering grinding, polishing or lapping agents for feeding of fluid, sprayed, pulverised, or liquefied grinding, polishing or lapping agents
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01F—COMPOUNDS OF THE METALS BERYLLIUM, MAGNESIUM, ALUMINIUM, CALCIUM, STRONTIUM, BARIUM, RADIUM, THORIUM, OR OF THE RARE-EARTH METALS
- C01F17/00—Compounds of rare earth metals
- C01F17/20—Compounds containing only rare earth metals as the metal element
- C01F17/206—Compounds containing only rare earth metals as the metal element oxide or hydroxide being the only anion
- C01F17/224—Oxides or hydroxides of lanthanides
- C01F17/235—Cerium oxides or hydroxides
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K3/00—Materials not provided for elsewhere
- C09K3/14—Anti-slip materials; Abrasives
-
- 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
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/10—Greenhouse gas [GHG] capture, material saving, heat recovery or other energy efficient measures, e.g. motor control, characterised by manufacturing processes, e.g. for rolling metal or metal working
Definitions
- the present invention relates to a method of recovering an abrasive component from a used abrasive slurry of an abrasive containing cerium oxide and cerium oxide recovered by the method.
- rare earth element oxides that contain cerium oxide as the main component and lanthanum oxide, neodymium oxide, praseodymium oxide, etc. have been used.
- Rare earth elements which are the main constituent elements of abrasives, are unevenly distributed throughout the world, and in Japan we are totally dependent on imports, so there are also concerns about stable supply.
- these abrasives are usually used in large quantities, and are difficult to separate from the components to be polished, so they are discarded after use, which has problems in terms of environmental burden and disposal costs. Yes.
- Patent Document 1 an electrolyte substance is added to the used abrasive material, the abrasive material is agglomerated and precipitated, the component derived from the polished substrate is dissolved, and solidified. A method for liquid separation is disclosed.
- the electrolyte substance alkali metal hydroxide, alkali metal carbonate, alkali metal salt, and ammonium salt are used.
- Patent Document 2 discloses a method of collecting fine abrasives by mixing sodium hydroxide and potassium hydroxide solution with a used abrasive and screening solids by solid-liquid separation. Yes.
- Patent Document 3 discloses a method for separating and removing aggregates such as silica in a slurry by adding sulfuric acid to a used abrasive and heat-treating it to dissolve rare earth and rare metal.
- the present invention has been made in view of the above-mentioned problems and situations, and the problem to be solved is a polishing agent after recovery in a method of recovering an abrasive component from a used slurry of an abrasive mainly composed of cerium oxide. And providing a method for recovering polishing components that facilitates the treatment of waste liquid. Moreover, it is providing the cerium oxide collect
- the present inventors have used the effect of salting out (coagulation) to disperse cerium oxide in the slurry that is the main component of the abrasive.
- coagulation salting out
- the performance it was possible to change from “a state where it is difficult to settle” to “a state where it is easy to settle”.
- the dispersibility of the glass component hardly changes, the inventors have found that separation from the glass component is possible by precipitating only cerium oxide, leading to the present invention.
- the abrasive component is recovered from the used abrasive slurry, wherein the abrasive component is recovered by coagulating and precipitating the abrasive component from the material component and the component derived from the object to be solid-liquid separated. How to recover.
- the magnesium salt is added so that the concentration of the magnesium salt in the used abrasive slurry is in the range of 5 to 26 mmol / L.
- the method for recovering the abrasive component from the used slurry of the abrasive mainly composed of cerium oxide by the above means of the present invention a large amount of acidic or basic compound is used to separate the abrasive and the abrasive.
- the two can be separated without using the.
- the conditions for separating the two are gentler than the conditions disclosed in the prior art, it is possible to provide a method for recovering polishing components that can be easily treated with the recovered abrasive and waste liquid.
- cerium oxide recovered by the novel recovery method can be provided.
- the method of recovering the abrasive component from the used abrasive slurry of the present invention is a method of recovering the abrasive component from the used abrasive slurry of the abrasive containing cerium oxide.
- the abrasive component is recovered by aggregating and precipitating the abrasive component from the abrasive component and the component to be polished in the slurry and solid-liquid separation. It is characterized by doing.
- This feature is a technical feature common to the inventions according to claims 1 to 4.
- the magnesium salt is magnesium chloride or magnesium sulfate from the viewpoint of manifesting the effects of the present invention. Furthermore, when adding the magnesium salt to the used abrasive slurry, it is preferable to add so that the concentration of the magnesium salt in the liquid of the used abrasive slurry is in the range of 5 to 26 mmol / L. .
- the method of recovering the abrasive component from the used abrasive slurry of the present invention can be suitably used for recovering cerium oxide.
- ⁇ is used to mean that the numerical values described before and after it are included as a lower limit value and an upper limit value.
- the method for recovering an abrasive component of the present invention is a method for recovering an abrasive component from a used abrasive slurry of an abrasive containing cerium oxide.
- the abrasive component is agglomerated and precipitated from the abrasive component and the component derived from the abrasive in the abrasive slurry to form a solid liquid.
- the abrasive component is recovered by separating.
- the used abrasive slurry is suitable as a method for recovering the abrasive component from the used abrasive slurry of the abrasive containing cerium oxide used as an abrasive such as optical glass and various glass substrates.
- the used abrasive slurry is preferably a slurry in which an abrasive and a glass component having a mass ratio of 1 to 10% with respect to water are dispersed. More preferred is a slurry in which an abrasive and a glass component having a mass ratio of 2 to 3% are dispersed.
- the present invention is characterized in that the abrasive component is recovered by coagulating and precipitating the abrasive component from the abrasive component and the component derived from the object to be polished in the abrasive slurry, and solid-liquid separation. To do.
- a magnesium salt is added as an aggregating and precipitating agent for aggregating and precipitating.
- the magnesium salt is not limited as long as it functions as an electrolyte, and examples thereof include magnesium chloride, magnesium bromide, magnesium iodide, magnesium oxide, magnesium sulfide, magnesium hydroxide, magnesium sulfate, and magnesium acetate.
- magnesium chloride, magnesium bromide, magnesium iodide, magnesium sulfate, and magnesium acetate which are highly soluble in water, are preferable, and particularly preferably, the pH change of the solution is small and the settled abrasive and waste liquid are treated.
- Particularly preferred are magnesium chloride and magnesium sulfate.
- the concentration of the magnesium salt in the liquid of the used abrasive slurry is in the range of 5 to 26 mmol / L. .
- agglomeration ability with respect to the used abrasive was confirmed using a plurality of kinds of salts.
- the separability of the glass component was confirmed about the salt considered to have a high aggregation effect.
- the “used abrasive slurry” used in the following experiment is an abrasive slurry used for processing a glass substrate for a hard disk, in which an abrasive and a glass component having a mass ratio of 2 to 3% with respect to water are dispersed. Slurry.
- Whether or not coagulation sedimentation occurred was determined by confirming whether an interface between the precipitate and the supernatant occurred during the 10 minutes after addition and stirring.
- Table 2 shows the addition amount and concentration of each solution. In addition, it confirmed by adding up to 3 ml, and it is set as x about what did not aggregate and precipitate.
- sample solution A the sample solution obtained according to the above procedure.
- (C) Si is quantified by the standard addition method, and Mg is quantified by the matrix matching calibration curve method.
- Table 3 shows the component analysis results.
- the glass component In the sample to which calcium chloride was added, the glass component was clearly agglomerated and precipitated, but in the sample to which the magnesium salt was added, the glass component was hardly agglomerated and precipitated.
- the treatment with magnesium salt is effective for separating cerium oxide and glass components.
- the present invention may be used in the field of polishing with a polishing material containing cerium oxide in the finishing process of optical glass, crystal oscillators and the like.
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- Geology (AREA)
- Inorganic Chemistry (AREA)
- Materials Engineering (AREA)
- Grinding-Machine Dressing And Accessory Apparatuses (AREA)
- Compounds Of Alkaline-Earth Elements, Aluminum Or Rare-Earth Metals (AREA)
Abstract
Description
本発明の研磨材成分を回収する方法は、酸化セリウムを含有する研磨材の使用済み研磨材スラリーから研磨材成分を回収する方法であることを特徴とする。
本発明は、前記研磨材スラリー中の研磨材成分及び被研磨物由来成分のうちから、当該研磨材成分を凝集沈殿させて固液分離することにより、当該研磨材成分を回収することを特徴とする。
以下の実験で用いた「使用済み研磨材スラリー」は、ハードディスク用ガラス基板の加工に使用された研磨材スラリーで、水に対して質量比2~3%の研磨材及びガラス成分が分散しているスラリーである。
ナトリウム塩 :塩化ナトリウム、炭酸ナトリウム、硫酸ナトリウム
カルシウム塩 :塩化カルシウム
リチウム塩 :塩化リチウム
カリウム塩 :塩化カリウム、炭酸カリウム、ヨウ化カリウム
マグネシウム塩:塩化マグネシウム、硫酸マグネシウム
実験に使用した塩の詳細は、表1に示す。
使用済研磨材スラリーに対して、上記塩の溶液を徐々に添加していき、凝集沈殿が開始する濃度を確認した。
使用済研磨材スラリーを遠沈管に30ml用意し、これに対して1mol/Lに調製した塩の溶液を徐々に添加していき、凝集沈殿が開始する量と濃度を測定した。
沈降物が確認された使用済研磨材のスラリーのサンプルを沈降物と上澄み液に分け、上澄み液をICP発光分光プラズマ分析装置により成分分析を行った。未処理のスラリーと比較してセリウム濃度が減少し、かつケイ素濃度が変化していなければ、沈降物は酸化セリウムであるとみなすことができる。
遠心分離により分離した上澄みに対して、ICPにより、セリウム成分、ガラス成分(Si成分)の濃度を測定し、未処理(添加剤無し)の使用済みスラリーと比較した。具体的には、下記の手順に従って行った。
(a)試料液Aをメンブレンフィルター(親水性PTFE)で濾過する。
(a)試料液Aをよく分散し5ml採取
エスアイアイナノテクノロジー社製ICP-AES SPS3520UVを用いて、フッ化水素酸導入システムにて測定した。
使用済研磨材スラリーを遠沈管に30ml用意し、これに対して1mol/Lに調製した塩化マグネシウムの水溶液を表4に記載の量だけ添加し、撹拌後10分間静置した。各サンプルを沈降物と上澄み液に分け、上澄み液をICP発光分光プラズマ分析装置により成分分析を行った。成分分析結果を表4に示す。
Claims (4)
- 酸化セリウムを含有する研磨材の使用済み研磨材スラリーから研磨材成分を回収する方法であって、前記使用済み研磨材スラリーに対して、マグネシウム塩を添加することで、当該研磨材スラリー中の研磨材成分及び被研磨物由来成分のうちから、当該研磨材成分を凝集沈殿させて固液分離することにより、当該研磨材成分を回収することを特徴とする使用済み研磨材スラリーから研磨材成分を回収する方法。
- 前記マグネシウム塩が、塩化マグネシウム又は硫酸マグネシウムであることを特徴とする請求項1に記載の使用済み研磨材スラリーから研磨材成分を回収する方法。
- 前記使用済み研磨材スラリーに対してマグネシウム塩を添加する際、当該使用済み研磨材スラリーの液中のマグネシウム塩の濃度が5~26mmol/Lの範囲内になるように添加することを特徴とする請求項1又は請求項2に記載の使用済み研磨材スラリーから研磨材成分を回収する方法。
- 請求項1から請求項3までのいずれか一項に記載の使用済み研磨材スラリーから研磨材成分を回収する方法により回収されたことを特徴とする酸化セリウム。
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP11856880.7A EP2669048B1 (en) | 2011-01-24 | 2011-09-29 | Method for recovering abrasive material component from used abrasive material slurry, and cerium oxide recovered through method |
JP2012554617A JP5370598B2 (ja) | 2011-01-24 | 2011-09-29 | 使用済み研磨材スラリーから酸化セリウムを含有する研磨材成分を回収する方法 |
US13/981,553 US20130298476A1 (en) | 2011-01-24 | 2011-09-29 | Method for Recovering Abrasive Material Component from used Abrasive Material Slurry, and Cerium Oxide Recovered through Method |
Applications Claiming Priority (2)
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JP2011011759 | 2011-01-24 | ||
JP2011-011759 | 2011-01-24 |
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WO2012101868A1 true WO2012101868A1 (ja) | 2012-08-02 |
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PCT/JP2011/072476 WO2012101868A1 (ja) | 2011-01-24 | 2011-09-29 | 使用済み研磨材スラリーから研磨材成分を回収する方法及び当該方法により回収された酸化セリウム |
Country Status (5)
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US (1) | US20130298476A1 (ja) |
EP (1) | EP2669048B1 (ja) |
JP (2) | JP5370598B2 (ja) |
MY (1) | MY158875A (ja) |
WO (1) | WO2012101868A1 (ja) |
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JP6044551B2 (ja) * | 2011-12-27 | 2016-12-14 | コニカミノルタ株式会社 | 研磨材分離方法 |
CN104455128A (zh) * | 2014-11-04 | 2015-03-25 | 安徽省中力车辆制动系统制造有限公司 | 一种大颗粒石墨陶瓷基少金属刹车片 |
Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
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JPH06254764A (ja) | 1993-03-03 | 1994-09-13 | Asahi Glass Co Ltd | 研磨液の再生方法 |
JPH1150168A (ja) | 1997-07-31 | 1999-02-23 | Canon Inc | 光学ガラス汚泥からレアアースメタル成分を回収する方法 |
JPH1190825A (ja) | 1997-09-18 | 1999-04-06 | Fukushima Prefecture | 研磨材の回収方法 |
JP2000254659A (ja) * | 1999-03-12 | 2000-09-19 | Kurita Water Ind Ltd | Cmp排液の処理方法 |
JP2004216352A (ja) * | 2003-01-10 | 2004-08-05 | Kimihiko Okanoe | 液体浄化装置 |
JP2004237163A (ja) * | 2003-02-04 | 2004-08-26 | Central Glass Co Ltd | 酸化セリウム研磨材の再使用方法 |
Family Cites Families (5)
Publication number | Priority date | Publication date | Assignee | Title |
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US2816824A (en) * | 1953-12-28 | 1957-12-17 | Corning Glass Works | Cerium oxide polishing composition |
US3436199A (en) * | 1964-07-15 | 1969-04-01 | American Potash & Chem Corp | Process for rejuvenating spent glass polishing agents |
JP3446988B2 (ja) * | 1997-04-10 | 2003-09-16 | 三井金属鉱業株式会社 | 廃セリウム研摩材からの研摩材原料の回収方法 |
JP2003205460A (ja) * | 2002-01-15 | 2003-07-22 | Speedfam Co Ltd | 酸化セリウム系研磨剤再生方法 |
JP4641763B2 (ja) * | 2004-08-25 | 2011-03-02 | 日本ミクロコーティング株式会社 | 粒子分離回収方法 |
-
2011
- 2011-09-29 JP JP2012554617A patent/JP5370598B2/ja active Active
- 2011-09-29 EP EP11856880.7A patent/EP2669048B1/en active Active
- 2011-09-29 MY MYPI2013701298A patent/MY158875A/en unknown
- 2011-09-29 WO PCT/JP2011/072476 patent/WO2012101868A1/ja active Application Filing
- 2011-09-29 US US13/981,553 patent/US20130298476A1/en not_active Abandoned
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2013
- 2013-07-22 JP JP2013151265A patent/JP5598580B2/ja active Active
Patent Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
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JPH06254764A (ja) | 1993-03-03 | 1994-09-13 | Asahi Glass Co Ltd | 研磨液の再生方法 |
JPH1150168A (ja) | 1997-07-31 | 1999-02-23 | Canon Inc | 光学ガラス汚泥からレアアースメタル成分を回収する方法 |
JPH1190825A (ja) | 1997-09-18 | 1999-04-06 | Fukushima Prefecture | 研磨材の回収方法 |
JP2000254659A (ja) * | 1999-03-12 | 2000-09-19 | Kurita Water Ind Ltd | Cmp排液の処理方法 |
JP2004216352A (ja) * | 2003-01-10 | 2004-08-05 | Kimihiko Okanoe | 液体浄化装置 |
JP2004237163A (ja) * | 2003-02-04 | 2004-08-26 | Central Glass Co Ltd | 酸化セリウム研磨材の再使用方法 |
Non-Patent Citations (1)
Title |
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See also references of EP2669048A4 |
Also Published As
Publication number | Publication date |
---|---|
EP2669048B1 (en) | 2020-05-20 |
JP5370598B2 (ja) | 2013-12-18 |
JP5598580B2 (ja) | 2014-10-01 |
MY158875A (en) | 2016-11-30 |
US20130298476A1 (en) | 2013-11-14 |
EP2669048A4 (en) | 2017-03-01 |
EP2669048A1 (en) | 2013-12-04 |
JPWO2012101868A1 (ja) | 2014-06-30 |
JP2013253249A (ja) | 2013-12-19 |
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