Ekstraksi tanah jarang
Ekstraksi tanah jarang (metode ekstraksi pelarut) adalah proses industri inti untuk memisahkan dan memurnikan unsur tanah jarang dari mineral campuran. 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 air) containing multiple rare earths with a specific organic extractant (fase organik) 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, pencucian, 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, Samarium, europium, gadolinium, dll..
Hlm507 (EHEHPA): Acidic extractant with high separation coefficient, is currently the mainstream reagent for separating light rare earths (such as lanthanum, cerium, praseodimium, 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.
Ekstraktan logam kami seperti di bawah ini, Jika Anda membutuhkan jenis apa pun, silakan bertanya kepada kami:
- P204 (D2EHPA atau HDEHP) Ini digunakan sebagai langkah pertama untuk menghilangkan pengotor pada bijih nikel laterit.
- Hlm507 ekstraktan logam non-ferrous untuk tembaga, seng, kobalt-nikel, kadmium, emas perak, logam golongan platina, tanah jarang dan sebagainya.
- DY272 Ekstraktan pemisahan kobalt nikel, itu dapat mengeluarkan kobalt dari larutan kobalt nikel, lalu sisakan nikel murni.
- DY984N reagen ekstraksi pelarut tembaga.
- DY319 ekstraktan ko-ekstraksi nikel kobalt efisiensi tinggi untuk daur ulang baterai, dapat mengeluarkan nikel dan kobalt bersama-sama dari elektrolit baterai Lithium.
- QL256-2 Ekstraktan co-ekstraksi Nikel Cobalt Mangan.
- DY377 ekstraksi pemisahan nikel dan intan yang efisien.
- DY366 Ekstraktan skandium.
- DY316 Ekstraktan litium.
