FIELD: chemistry.
SUBSTANCE: invention relates to a method of extracting rare-earth elements from phosphoric acid when processing Khibiny apatite concentrates into fertiliser. The method includes sorption using strongly acidic macroporous cationite Purolite C-150, carried out in the temperature range of 40-80°C, washing the rare-earth element-saturated sorbent with water, desorption with ammonium nitrate solution to obtain a commercial-grade strippant and further solvent refinement of the obtained strippant with 100% tributyl phosphate.
EFFECT: invention improves extraction of rare-earth elements while reducing content of impurities of other elements.
3 cl, 1 dwg, 7 tbl, 4 ex
| Title | Year | Author | Number |
|---|---|---|---|
| METHOD OF EXTRACTING RARE EARTH METALS FROM NITROPHOSPHATE SOLUTION IN NITRIC ACID PROCESSING OF APATITE CONCENTRATE | 2014 |
|
RU2559476C1 |
| METHOD OF PROCESSING RARE-EARTH ELEMENTS CONCENTRATE | 2015 |
|
RU2595672C1 |
| METHOD OF PROCESSING PHOSPHOGYPSUM FOR PRODUCTION OF CONCENTRATE OF RARE EARTH METALS AND GYPSUM | 2013 |
|
RU2520877C1 |
| METHOD OF EXTRACTING RARE EARTH ELEMENTS FROM EXTRACTION PHOSPHORIC ACID | 2013 |
|
RU2525947C1 |
| METHOD OF EXTRACTING RARE-EARTH METALS FROM PHOSPHOGYPSUM | 2012 |
|
RU2491362C1 |
| METHOD OF EXTRACTING RARE-EARTH ELEMENTS FROM WET-PROCESS PHOSPHORIC ACID | 2013 |
|
RU2545337C2 |
| METHOD OF EXTRACTING RARE EARTH ELEMENTS FROM EXTRACTION PHOSPHORIC ACID | 2013 |
|
RU2544731C2 |
| METHOD OF EXTRACTING RARE-EARTH ELEMENTS FROM PHOSPHOGYPSUM | 2017 |
|
RU2663512C1 |
| METHOD OF EXTRACTING RARE-EARTH ELEMENTS FROM WET-PROCESS PHOSPHORIC ACID | 2011 |
|
RU2465207C1 |
| METHOD FOR PHOSPHOGYPSUM PROCESSING | 2017 |
|
RU2665512C1 |
