推薦產(chǎn)品
3-(4-chlorophenyl)-4-phenyl-4,5-dihydro-1H-pyrazole 2-(chloromethyl)-3-methylpyridinehydrochloride 1-(2-bromo-4-methylphenyl)ethanone 3-chloroisoquinoline-4-carbonitrile 5,8-dichloropyrido[3,2-d]pyridazine 2-bromomalononitrile 2-(4-(bromomethyl)phenyl)benzo[d]thiazole 1-(bromomethyl)-3-methoxy-2-nitrobenzene 6-bromo-1H-[1,2,3]triazolo[4,5-b]pyridine 4-iodo-2-((trimethylsilyloxy)methyl)thiazole 6-iodoimidazo[1,2-a]pyridine-3-carbonitrile 2-(4-chlorophenyl)-2-morpholinoacetonitrile 4-chloro-7H-pyrrolo[2,3-d]pyrimidine 4-chloroisothiazole 5-bromo-6-chloro-1H-indole 7-chloro-3H-imidazo[4,5-b]pyridine ethyl3-(4-formylphenyl)propanoate 2,3-dibromobenzaldehyde 1-(5H-chromeno[2,3-b]pyridin-7-yl)ethanone 5H-chromeno[2,3-b]pyridin-5-one 3-chloroisoquinoline-4-carbaldehyde (E)-2-(3-oxoprop-1-enyl)benzaldehyde methyl4-formyl-3-nitrobenzoate 5,6-dimethoxy-2,2-dimethyl-2,3-dihydro-1H-inden-1-one 1-methylbicyclo[4.1.0]heptan-3-one 3-nitro-4-(trifluoromethoxy)benzaldehyde 2-hydroxyquinoline-6-carbaldehyde 2-nitro-3-(trifluoromethyl)benzaldehyde 1-(2-fluoro-4-methoxyphenyl)propan-2-one tert-butyl3-fluoro-4-oxopiperidine-1-carboxylate tert-butyl3-oxopropylcarbamate 2,2-dimethylcyclohexanone 9H-carbazole-3-carbaldehyde N,N-dimethyl-2-oxoacetamide 2-methylpent-4-yn-2-ol 3-tert-butyl-4-hydroxybenzonitrile 4-bromo-2-tert-butylphenol 1,3-dibutoxypropan-2-ol methyl4-hydroxyquinoline-6-carboxylate methyl3-cyano-4-hydroxybenzoate 4-chloro-6-methoxyquinolin-7-ol 3,4-dihydro-2H-benzo[b][1,4]oxazin-7-ol 2-(2-aminothiazol-5-yl)ethanolhydrochloride (R)-ethyl2-chloropropanoate (S)-4-amino-5-(4,4-dimethylcyclohexylamino)-5-oxopentanoicacid (1s,4s)-4-hydroxycyclohexanecarboxylicacid (S)-2-(tetrahydrofuran-3-yloxy)aceticacid (1S,4R)-1-methyl-4-(prop-1-en-2-yl)cyclohex-2-enol (R)-4-(hydroxymethyl)oxazolidin-2-one (S)-4-(hydroxymethyl)oxazolidin-2-one 化工資訊 日前，格陵蘭礦產(chǎn)能源公司(GMEL)發(fā)布消息稱其正在進行的Kvanefjeld project稀土項目的技術(shù)優(yōu)化獲得了重大突破。
優(yōu)化方案是與其大股東盛和資源合作進行的，包括為了簡化精煉過程而進行篩選，這樣做旨在簡化生產(chǎn)步驟和減少生產(chǎn)設(shè)備，并使生產(chǎn)的稀土產(chǎn)品與下游應(yīng)用達到最佳匹配。
據(jù)悉，GMEL旗下的Kvanefjeld項目擁有符合JORC標準的資源量接近10億公噸，稀土氧化物總量超千萬噸，主要稀土產(chǎn)品包括釹、鐠、鏑和鋱，足以維持37年的開采。
優(yōu)化的關(guān)鍵在于將提取方法改為HCl直接濃縮浸出，而不是常用的硫酸直接浸出法和HCl二次浸出法。在以往的實踐中，直接用HCl浸出稀土元素總有硅污染過高的問題，但經(jīng)GMEL改進后，可讓濃縮液中的硅含量在浸出步驟中得到控制。
新方法可以同時從濃縮液中提取出高水平的稀土和鈾：通過將HCI與礦物濃縮物直接混合，可產(chǎn)生一種粘滯的糊狀物，經(jīng)過30分鐘的攪拌后再將這種黏稠的糊狀物進行水解。
在攪拌的過程中，稀土元素會被溶解，硅則以沉淀的形式排出，過程無需高溫、高壓或極端的化學(xué)環(huán)境等常見的稀土提取條件，非常適用于非難熔性質(zhì)的稀土材料。
