E-resources
Peer reviewed
-
Barakat, M.A.; Mahmoud, M.H.H.; Mahrous, Y.S.
Applied catalysis. A, General, 02/2006, Volume: 301, Issue: 2Journal Article
An efficient and complete separation of precious metals from the containing secondary materials has a vital economic impact. Palladium loaded on alumina support is usually used as a catalyst in fertilizers industry where the recovery of the metals from the spent catalyst is practically important. Palladium was partially dissolved from the spent catalyst in hot concentrated hydrochloric acid where a large amount of aluminum is also dissolved. The main objective of this work is to find out the optimum conditions for efficient and clean dissolution of palladium with minimum attack to the alumina carrier. Palladium can form different soluble chloro-complexes which can enhance the dissolution process if an oxidizing agent is added. A small amount of hydrogen peroxide could greatly improve the dissolution of palladium in dilute hydrochloric acid while the alumina support was left nearly unaffected. Complete dissolution of palladium was achieved by leaching with a solution contains 7% HCl and 5% H 2O 2 at 60 °C for 2 h with a liquid/solid ratio of 10/1. The leach liquor contained 0.04% palladium and 0.5% aluminum and the filtered solids was a pure aluminum rich residue. Palladium could be separated from the leach liquor by reduction with formic acid solution. Heating the solution increased the efficiency of palladium reduction and also produced larger palladium particles those can be easily separated by filtration. Palladium powder of 98% purity was produced with recovery efficiency >99%.
Shelf entry
Permalink
- URL:
Impact factor
Access to the JCR database is permitted only to users from Slovenia. Your current IP address is not on the list of IP addresses with access permission, and authentication with the relevant AAI accout is required.
Year | Impact factor | Edition | Category | Classification | ||||
---|---|---|---|---|---|---|---|---|
JCR | SNIP | JCR | SNIP | JCR | SNIP | JCR | SNIP |
Select the library membership card:
If the library membership card is not in the list,
add a new one.
DRS, in which the journal is indexed
Database name | Field | Year |
---|
Links to authors' personal bibliographies | Links to information on researchers in the SICRIS system |
---|
Source: Personal bibliographies
and: SICRIS
The material is available in full text. If you wish to order the material anyway, click the Continue button.