Extração de terras raras

Extração de terras raras (método de extração com solvente) é o principal processo industrial para separar e purificar elementos de terras raras de minerais mistos. 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 (fase aquosa) containing multiple rare earths with a specific organic extractant (fase orgânica) 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, lavando, 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, samário, európio, gadolínio, etc..
P507 (EHEHPA): Acidic extractant with high separation coefficient, is currently the mainstream reagent for separating light rare earths (such as lanthanum, cério, praseodímio, 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.

Nossos extratores de metal como abaixo, Se você precisar de algum tipo, por favor pergunte-nos:

1. P204 (D2EHPA ou HDEHP) Isso é usado na primeira etapa para remover impurezas do minério de níquel laterítico.
2. P507 extrator de metais não ferrosos para cobre, zinco, cobalto-níquel, cádmio, ouro-prata, metais do grupo da platina, terras raras e assim por diante.
3. DY272 Extratante de separação de níquel cobalto, pode retirar o cobalto da solução de níquel-cobalto, então deixe níquel puro.
4. DY984N reagente de extração de solvente de cobre.
5. DY319 extrator de coextração de níquel-cobalto de alta eficiência para reciclagem de baterias, pode retirar níquel e cobalto juntos do eletrólito da bateria de lítio.
6. QL256-2 Extrator de co-extração de níquel cobalto manganês.
7. DY377 eficiente extrator de separação de níquel e diamante.
8. DY366 Extrator de escândio.
9. DY316 Extrator de lítio.