FIELD: chemistry.
SUBSTANCE: method involves catalysts calcination at a temperature of 600-850°C, re-firing at a temperature of 1200-1300°C with capture of rhenium compounds. Then, platinum is leached from the cinder and the insoluble residue is washed in hydrochloric acid, with addition of nitric acid as an oxidizer, until the oxidation-reduction potential in the pulp with respect to the silver chloride reference electrode equal to 780-840 mV is reached.
EFFECT: reduced consumption of nitric acid with the required full extraction of platinum.
1 tbl, 1 ex
| Title | Year | Author | Number |
|---|---|---|---|
| METHOD OF COMPLEX REWORKING OF DECONTAMINATED PLATINUM-RHENIUM CATALYSTS | 2003 |
|
RU2261284C2 |
| METHOD OF EXTRAXTION OF RHENIUM AND/OR PLATINUM FROM DEACTIVATED CATALYSTS WITH ALUMINIUM-OXIDED CARRIER | 2009 |
|
RU2398899C1 |
| METHOD OF EXTRACTING RHENIUM AND PLATINUM METALS FROM SPENT CATALYSTS ON ALUMINIUM OXIDE SUPPORTS | 2013 |
|
RU2525022C1 |
| METHOD OF EXTRACTING PLATINUM AND/OR PALLADIUM FROM SPENT CATALYSTS ON ALUMINIUM OXIDE SUPPORTS | 2014 |
|
RU2553273C1 |
| METHOD FOR PROCESSING MATERIALS CONTAINING PRECIOUS METALS AND IRON | 2020 |
|
RU2750735C1 |
| OPENING METHOD OF PRODUCTS, CONTAINING PRECIOUS METALS | 2008 |
|
RU2375476C1 |
| METHOD FOR EXTRACTING GOLD FROM GOLD-CONTAINING FLOTATION CONCENTRATE | 2021 |
|
RU2763710C1 |
| METHOD FOR PRODUCING REFINED PALLADIUM | 2021 |
|
RU2775785C1 |
| METHOD OF COMPLEX PROCESSING OF PYRITIC RAW MATERIALS | 2016 |
|
RU2627835C2 |
| METHOD OF PROCESSING PLATINUM-RHENIUM CATALYSTS | 2006 |
|
RU2311466C1 |
