JP2020535102A - 疎水性磁性粒子での凝集による黒鉛粒子の濃縮 - Google Patents
疎水性磁性粒子での凝集による黒鉛粒子の濃縮 Download PDFInfo
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- JP2020535102A JP2020535102A JP2020517994A JP2020517994A JP2020535102A JP 2020535102 A JP2020535102 A JP 2020535102A JP 2020517994 A JP2020517994 A JP 2020517994A JP 2020517994 A JP2020517994 A JP 2020517994A JP 2020535102 A JP2020535102 A JP 2020535102A
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Classifications
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- B03—SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
- B03C—MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
- B03C1/00—Magnetic separation
- B03C1/002—High gradient magnetic separation
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Abstract
Description
a) 黒鉛粒子と不要材料とを含有する供給原料を用意する工程と、
b) 疎水性磁性粒子を供給原料に添加し、それにより磁性粒子と黒鉛粒子との凝集体を含有する負荷された供給原料を得る工程と、
c) 負荷された供給原料から磁場により凝集体を分離し、それにより凝集体を単離する工程
を含む、黒鉛粒子を濃縮する方法により解決された。
工程a)では、黒鉛粒子と不要材料とを含有する供給原料を用意する。
工程b)では、疎水性磁性粒子を供給原料に添加し、それにより磁性粒子と黒鉛粒子との凝集体を含有する負荷された供給原料を得る。
− アルキルシリコネート、例えば、アルカリ金属またはアルカリ土類金属C1〜6アルキルシリコネート、特にメチルシリコネート、
− アルキルトリクロロシラン、例えばC6〜12アルキルトリクロロシラン、
− アルキルトリメトキシシラン、例えばC6〜12アルキルトリメトキシシラン、
− アルキルホスホン酸、例えば、C6〜18アルキルホスホン酸、特にオクチルホスホン酸、
− モノまたはジアルキルホスホン酸エステル、例えばC6〜18モノまたはジアルキルホスホン酸エステル、
− 脂肪酸、例えば、C6〜18脂肪酸、特に、ラウリン酸、オレイン酸、ステアリン酸、
またはそれらの混合物。
工程c)では、負荷された供給原料から磁場により凝集体を分離し、それにより凝集体を単離する。
黒鉛粒子を濃縮する方法は、d)単離された凝集体をばらして磁性粒子および黒鉛粒子を個別に得る工程をさらに含んでいてもよい。
例1
a)供給原料
XRD分析によると20%である黒鉛、ならびに0.03%である炭酸塩としての炭素、カルシアン曹長石、玻璃長石としての長石、石英、磁硫鉄鉱および黒雲母を主要結晶構成要素として含有するヨーロッパ鉱床(European deposit)から黒鉛鉱石を粉砕して、20μmの粒径D50にした。20g(19.9gの乾燥質量)のこの粉砕された鉱石を、60gの濾液した川の水に分散させ、続いて、100mgの炭化水素捕収剤(直鎖状、分枝鎖状および環状アルカン(主にC9〜11)の工業用混合物、芳香族含量2%未満、初期沸点160℃)(乾燥質量の供給原料を基準として0.5重量%)を添加した。その後、この分散液を、バッフル付ビーカー内で、Ultra Turrax(登録商標)T25撹拌機を用いて、10分にわたり10000rpmで激しく混合した(比エネルギー投入量は約600kWh/m3)。
乾燥した疎水性磁鉄鉱粒子を、国際公開第2015/110555号の例1に準拠して、4μmのD50を有する磁鉄鉱粒子とポリオルガノシロキサン(固体メチルシリコーン樹脂、Mp35〜55℃、約6700g/molの分子量Mwを有する約[CH3SiO1.5]100の平均組成)とをベースとして製造した。
得られた分散液を、6l/hの速度で、4×2mmのくさび型ワイヤマトリックスを備える湿式高強度磁気分離器(WHIMS)である実験室規模の磁気分離器に、0.7Tの磁場強度で圧送する(Eriez Magnetics Europe Ltd.、UKから市販で入手可能)。供給物の添加完了後に、マトリックスを水で濯ぐ。分散液と洗浄水とを合したものを非磁性尾鉱として捕収する。その後、磁場のスイッチを切り、磁鉄鉱黒鉛凝集体を含有する磁性留分をマトリックスから濯ぎ出して、磁性精鉱を得た。分析結果は、表1に要約されている。空気中で試料を燃焼させ、生成された二酸化炭素の量を測定することにより、黒鉛含量を求めた。
乾燥質量として20.1gの供給物、および500mgの炭化水素捕収剤(乾燥質量の供給原料を基準として2.5重量%)を用いたことを除いて、例1と同じ実験条件を使用した。
Claims (17)
- a) 黒鉛粒子と不要材料とを含有する供給原料を用意する工程と、
b) 疎水性磁性粒子を前記供給原料に添加し、それにより前記磁性粒子と前記黒鉛粒子との凝集体を含有する負荷された供給原料を得る工程と、
c) 前記負荷された供給原料から磁場により前記凝集体を分離し、それにより前記凝集体を単離する工程
を含む、黒鉛粒子を濃縮する方法。 - d)前記単離された凝集体をばらして前記磁性粒子および前記黒鉛粒子を個別に得る工程をさらに含む、請求項1記載の方法。
- 前記供給原料が、分散液、好ましくは水性分散液である、請求項1または2記載の方法。
- 前記供給原料が、疎水性層を前記黒鉛粒子上に選択的に形成する捕収剤をさらに含有する、請求項1から3までのいずれか1項記載の方法。
- 前記捕収剤が、鉱油、植物油、バイオディーゼル、BtL(バイオマス・トゥ・リキッド)燃料、石炭液化生成物、GtL(天然ガスからのガス・トゥ・リキッド)プロセスの生成物、長鎖アルコール、およびそれらの混合物より選択される炭化水素である、請求項4記載の方法。
- 前記供給原料が、前記供給原料の乾燥質量を基準として0.1〜10重量%の前記捕収剤を含む、請求項4または5記載の方法。
- 前記供給原料が5〜99重量%の黒鉛を含む、請求項1から6までのいずれか1項記載の方法。
- 前記磁性粒子が、乾燥した黒鉛粒子および不要材料の重量を基準として、0.01〜100重量%、好ましくは0.1〜20重量%、特に好ましくは0.5〜10重量%の量で前記供給原料に添加される、請求項1から7までのいずれか1項記載の方法。
- 前記供給原料が、天然の黒鉛鉱石、電子機器スクラップまたはバッテリスクラップをベースとする、請求項1から8までのいずれか1項記載の方法。
- 前記不要材料が、親水性金属化合物または親水性半金属化合物を含む、請求項1から9までのいずれか1項記載の方法。
- 前記供給原料を磁気分離にかけて、磁性または磁化可能材料を除去する、請求項1から10までのいずれか1項記載の方法。
- 前記供給原料中の前記黒鉛粒子の濃度を1.1〜100倍上昇させる、請求項1から11までのいずれか1項記載の方法。
- 前記疎水性磁性粒子を、ポリオルガノシロキサン、アルキルシリコネート、アルキルトリクロロシラン、アルキルトリメトキシシラン、アルキルホスホン酸、モノまたはジアルキルホスホン酸エステル、脂肪酸、またはそれらの混合物より選択される疎水化剤による処理で疎水化する、請求項1から12までのいずれか1項記載の方法。
- 前記黒鉛粒子が、1nm〜1mmの平均直径D50を有する、請求項1から13までのいずれか1項記載の方法。
- 前記磁性粒子が、磁性金属、磁性金属の強磁性もしくはフェリ磁性合金、磁性酸化鉄、立方晶フェライト、またはそれらの混合物を含む、請求項1から14までのいずれか1項記載の方法。
- 前記黒鉛粒子が、化学元素としての炭素の六方晶または菱面体晶の結晶性多層変形形態である黒鉛を含む、請求項1から15までのいずれか1項記載の方法。
- 黒鉛粒子と、疎水性磁性粒子と、捕収剤とを含む、請求項1から16までのいずれか1項に定義されている凝集体。
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US5161694A (en) * | 1990-04-24 | 1992-11-10 | Virginia Tech Intellectual Properties, Inc. | Method for separating fine particles by selective hydrophobic coagulation |
JP2012519073A (ja) * | 2009-03-04 | 2012-08-23 | ビーエーエスエフ ソシエタス・ヨーロピア | 磁性の疎水性凝集塊 |
JP2015523299A (ja) * | 2012-05-07 | 2015-08-13 | マサチューセッツ インスティテュート オブ テクノロジー | 炭素−ベースのナノ構造体の分離のための組成物、方法及びシステム |
WO2016083575A1 (en) * | 2014-11-27 | 2016-06-02 | Basf Se | Energy input during agglomeration for magnetic separation |
EP3181230A1 (en) * | 2015-12-17 | 2017-06-21 | Basf Se | Ultraflotation with magnetically responsive carrier particles |
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FI3687696T3 (fi) | 2023-05-04 |
US20200290880A1 (en) | 2020-09-17 |
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JP7317812B2 (ja) | 2023-07-31 |
HUE061858T2 (hu) | 2023-08-28 |
WO2019063354A1 (en) | 2019-04-04 |
US11420874B2 (en) | 2022-08-23 |
EP3687696A1 (en) | 2020-08-05 |
KR20200054218A (ko) | 2020-05-19 |
EP3687696B1 (en) | 2023-03-08 |
KR102594228B1 (ko) | 2023-10-25 |
PL3687696T3 (pl) | 2023-06-26 |
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