Extracția pământurilor rare

Extracția pământurilor rare (metoda de extracție cu solvent) este procesul industrial de bază pentru separarea și purificarea elementelor pământurilor rare din minerale amestecate. It utilizes the difference in distribution coefficients of different rare earth ions in organic solvents and inorganic aqueous phases to achieve the separation of high-purity single rare earth elements. This technology has established China’s dominant position in the global rare earth smelting and separation field.

The following is the core structure of rare earth extraction process:
1. Core principles and processes
Basic principle: Mix an acidic solution (faza apoasa) containing multiple rare earths with a specific organic extractant (faza organica) vigorously in an extraction box. Due to the differences in chemical properties of different rare earth elements, they will transfer to the organic phase with different affinities.
Multi stage cross flow/countercurrent extraction: Due to the extremely similar properties between rare earth elements (especially adjacent lanthanide elements), continuous extraction, spălat, and back extraction at hundreds or even thousands of levels are necessary to separate a single rare earth element to a purity of up to 99.999%.
2. Common extractants
According to different types of rare earth minerals and extraction requirements, the following types of phosphorus or amine organic extractants are commonly used in industry:
P204 (HDEHP): Acidic extractant, mainly used for the separation of heavy rare earths and the extraction of elements such as yttrium, samariu, europiu, gadoliniu, etc.
P507 (EHEHPA): Acidic extractant with high separation coefficient, is currently the mainstream reagent for separating light rare earths (such as lanthanum, Ceriu, praseodimiu, neodymium).
N235 (N1923): Alkaline/neutral extractant, commonly used for separating light rare earths or extracting associated elements from hydrochloric acid systems.
3. Technological breakthroughs and industrial impacts
Cascade extraction theory: proposed by the team of renowned Chinese chemist Academician Xu Guangxian, it solves the world-class problem of traditional processes being difficult to achieve industrial mass production of single high-purity rare earths, and enables China’s rare earth separation technology to reach a global leading level.
Green extraction process: Modern extraction technology is developing towards non saponification and low ammonia nitrogen wastewater discharge to solve the environmental pain points in traditional extraction processes.

Extracții noștri de metal, ca mai jos, Dacă ai nevoie de orice fel, vă rugăm să ne întrebați:

1. P204 (D2EHPA sau HDEHP) Acesta este utilizat pentru primul pas pentru a elimina impuritățile pentru minereul de nichel de laterită.
2. P507 extractant de metale neferoase pentru cupru, zinc, cobalt-nichel, cadmiu, aur argint, metale din grupa platinei, pământuri rare și așa mai departe.
3. DY272 Extractor de separare a nichel-cobalt, poate elimina cobaltul din soluția de nichel-cobalt, apoi lăsați nichel pur.
4. DY984N reactiv de extracție cu solvent de cupru.
5. DY319 extractant de co-extracție de nichel cobalt de înaltă eficiență pentru reciclarea bateriilor, poate scoate împreună nichelul și cobaltul din electrolitul bateriei cu litiu.
6. QL256-2 Nichel Cobalt Mangan Co extractant.
7. DY377 extractant eficient de separare a nichelului și a diamantului.
8. DY366 Extractor de scandiu.
9. DY316 Extractor de litiu.