id:"swepub:oai:DiVA.org:kth-236893"
Sökning: id:"swepub:oai:DiVA.org:kth-236893" > Isolation of rare e...
- 1 av 1
- Föregående post
- Nästa post
- Till träfflistan
| Fältnamn | Indikatorer | Metadata |
|---|---|---|
| 000 | 04026naa a2200637 4500 | |
| 001 | oai:DiVA.org:kth-236893 | |
| 003 | SwePub | |
| 008 | 181212s2016 | |||||||||||000 ||eng| | |
| 024 | 7 | a https://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-2368932 URI |
| 040 | a (SwePub)kth | |
| 041 | a engb eng | |
| 042 | 9 SwePub | |
| 072 | 7 | a ref2 swepub-contenttype |
| 072 | 7 | a kon2 swepub-publicationtype |
| 100 | 1 | a Alemrajabi, Mahmood,d 1989-u KTH,Kemiteknik4 aut0 (Swepub:kth)u16fu27t |
| 245 | 1 0 | a Isolation of rare earth element phosphate precipitate in the nitrophosphate process for manufacturing of fertilizer |
| 264 | 1 | b Canadian Institute of Mining, Metallurgy and Petroleum,c 2016 |
| 338 | a print2 rdacarrier | |
| 500 | a QC 20181212 | |
| 520 | a In the present study, the recovery of rare earth elements (REE) in the nitrophosphate process of fertilizer production is investigated. The apatite has been recovered from iron ore tailings by flotation. After digestion of apatite in concentrated nitric acid, Ca(NO3)2.4H2O is first separated by cooling crystallization and then the REEs are recovered by precipitation. Optimum conditions in these steps have been determined in a previous study. The precipitate mainly consists of CaHPO4.2H2O and REE phosphates. In the present study, selective dissolution and re-precipitation have been studied in order to obtain a precipitate that is more concentrated in REEs. The precipitate was selectively dissolved in nitric and phosphoric acid at different acidities (pH 6 to 0) with the liquid /solid ratio of 100 mL/g. It is shown that most of the CaHPO4.2H2O and other calcium containing compounds will be dissolved at pH 2 while the REE phosphates are not dissolved above a pH of approximately 2. Thus, by partial dissolution of the REE precipitate at pH 2.5 most of the solid calcium phosphates will be dissolved and the remaining solid phase, which is more concentrated in REEs, can be filtered off as a fairly concentrated REE solid mass and the liquor can be recycled back to recover more P nutrients. Alternatively, the REE enriched precipitate was dissolved completely in nitric acid and re-precipitated again by addition of ammonium hydroxide to pH 1.2. A chemical equilibrium software, MEDUSA (Puigdomenech, 2013) has been used to evaluate the experimental results and to estimate the optimum conditions for selectively dissolving the precipitate. | |
| 650 | 7 | a NATURVETENSKAPx Geovetenskap och miljövetenskapx Geokemi0 (SwePub)105062 hsv//swe |
| 650 | 7 | a NATURAL SCIENCESx Earth and Related Environmental Sciencesx Geochemistry0 (SwePub)105062 hsv//eng |
| 653 | a Apatite | |
| 653 | a Precipitation | |
| 653 | a REE | |
| 653 | a Selective dissolution | |
| 653 | a Ammonium hydroxide | |
| 653 | a Calcium carbide | |
| 653 | a Calcium phosphate | |
| 653 | a Concentration (process) | |
| 653 | a Dissolution | |
| 653 | a Fertilizers | |
| 653 | a Flotation | |
| 653 | a Heterojunctions | |
| 653 | a Iron ores | |
| 653 | a Metal recovery | |
| 653 | a Nitric acid | |
| 653 | a Ore tailings | |
| 653 | a Ore treatment | |
| 653 | a Phosphates | |
| 653 | a Rare earth elements | |
| 653 | a Rare earths | |
| 653 | a Calcium-containing compounds | |
| 653 | a Chemical equilibriums | |
| 653 | a Concentrated nitric acid | |
| 653 | a Cooling crystallization | |
| 653 | a Fertilizer production | |
| 653 | a Optimum conditions | |
| 653 | a Partial dissolution | |
| 653 | a Precipitation (chemical) | |
| 700 | 1 | a Forsberg, Kerstin,d 1979-u KTH,Kemiteknik4 aut0 (Swepub:kth)u1dfmuzo |
| 700 | 1 | a Korkmaz, Kivancu KTH,Kemiteknik4 aut0 (Swepub:kth)u131kc7h |
| 700 | 1 | a Rasmuson, Åke C.u KTH,Kemiteknik4 aut0 (Swepub:kth)u1w1ulhl |
| 710 | 2 | a KTHb Kemiteknik4 org |
| 773 | 0 | t IMPC 2016 - 28th International Mineral Processing Congressd : Canadian Institute of Mining, Metallurgy and Petroleumz 9781926872292 |
| 856 | 4 8 | u https://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-236893 |
Hitta via bibliotek
- IMPC 2016 - 28th International Mineral Processing Congress (Sök värdpublikationen i LIBRIS)
Till lärosätets databas
- 1 av 1
- Föregående post
- Nästa post
- Till träfflistan
Hitta mer i SwePub
- Av författaren/redakt...
- Alemrajabi, Mahm ...
- Forsberg, Kersti ...
- Korkmaz, Kivanc
- Rasmuson, Åke C.
- Om ämnet
-
- NATURVETENSKAP
- NATURVETENSKAP
- och Geovetenskap och ...
- och Geokemi
- Artiklar i publikationen
- IMPC 2016 - 28th ...
- Av lärosätet
- Kungliga Tekniska Högskolan
Sök utanför SwePub
- Sök vidare i:
- Google Book Search
- Google Scholar
Kungliga biblioteket hanterar dina personuppgifter i enlighet med EU:s dataskyddsförordning (2018), GDPR. Läs mer om hur det funkar här.
Så här hanterar KB dina uppgifter vid användning av denna tjänst.
- Copyright © LIBRIS - Nationella bibliotekssystem
- LIBRIS.kb.se
