Recovery and separation of palladium from spent catalyst

Barakat, M.A.; Mahmoud, M. H. H.; Mahrous, Y. Sh.

doi:10.1016/j.apcata.2005.11.028

Cited by 100 publications

(46 citation statements)

References 5 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…electronic-, pharmaceutical-and chemical industry, due to its specific physical and chemical properties. The recovery and extraction of palladium from industrial waste has gained considerable interest due to high demand, low natural abundance (Barakat et al 2006;Liu et al 2003) and the heavy-metal toxic effect palladium exerts to animals, plants and humans (Nolan and Lippard 2008). Furthermore, palladium is a frequently used catalyst for the formation of C-C bonds in the production of pharmaceuticals and is allowed only in sub 5 ppm amounts in pharmaceuticals (Products CfPM 2002).…”

Section: Introductionmentioning

confidence: 99%

A green and simple method for preparation of an efficient palladium adsorbent based on cysteine functionalized 2,3-dialdehyde cellulose

2016

View full text Add to dashboard Cite

A green and efficient adsorbent for adsorption of palladium ions was prepared from 2,3-dialdehyde cellulose (DAC) originating from nanocellulose from the green algae Cladophora. The DAC was functionalized with cysteine via reductive amination in a convenient one-pot procedure to provide the adsorbent. The adsorption properties for adsorbing palladium(II) ions, including capacity, adsorption isotherm and kinetics, were studied. The successful reductive amination of cysteine with 2,3-dialdehyde cellulose was confirmed by FT-IR, elemental analysis and XPS. The adsorbent was characterized by SEM, XRD, gas adsorption and TGA. The adsorbent had a high adsorption capacity (130 mg palladium per gram adsorbent) and enabled fast adsorption of palladium(II) ions from solution (80 % of maximum capacity reached in 2 h). Adsorbent materials suitable for both filters (fibrous) and column matrixes (spherical particles) could be obtained in an efficient manner by controlling the degree of oxidation while producing the DAC material.

show abstract

Section: Introductionmentioning

confidence: 99%

A green and simple method for preparation of an efficient palladium adsorbent based on cysteine functionalized 2,3-dialdehyde cellulose

2016

View full text Add to dashboard Cite

show abstract

“…Some hard-soft ligands such as SCN − , CO 3 2− , and RCOO − were chosen for stripping experiments. In the recovery of the PGMs, the concentration of the acid is often controlled to 6 mol/L in the presence of oxidizing agents [1,5]. A synthetic solution containing 100 mg/L Pd(II) was prepared, and the HCl concentration was adjusted to 5 mol/L HCl for the stripping experiments.…”

Section: Extraction Of Pd(ii) With Mixture Of Cyanex 301 and Various mentioning

confidence: 99%

“…Because the consumption of Pd increases each year, the recovery of this metal from either ores or secondary resources is essential. Several methods are used in the separation of Pd(II) from the leaching solutions of HCl or HNO 3 , such as precipitation [3], ion exchange [2,4], and solvent extraction [5][6][7][8][9][10][11][12]. Among these methods, solvent extraction is suitable for the separation of platinum group metals (PGMs) because of its high selectivity and the purity of metals thus obtained [9].…”

Section: Introductionmentioning

confidence: 99%

Extraction of Palladium(II) from Hydrochloric Acid Solutions by Solvent Extraction with Mixtures Containing Either Cyanex 301 or LIX 63

Truong

Lee

Son

2017

Metals

View full text Add to dashboard Cite

Cyanex 301 and 5,8-diethyl-7-hydroxyldodecane-6-oxime (LIX 63) can selectively extract Pd(II) over Pt(IV) from concentrated hydrochloric acid solutions. Therefore, solvent extraction experiments have been performed by extractant mixtures containing either Cyanex 301 or LIX 63, and the extraction behavior of Pd(II) was compared. Among the mixtures of Cyanex 301, the highest synergistic enhancement coefficient was achieved by mixing Cyanex 301 and trioctylphosphine oxide (TOPO). However, it was very difficult to strip the Pd(II) from the loaded mixture phase. Among the mixtures of LIX 63, the mixture of LIX 63 and alamine 336/TOPO enhanced the extraction of Pd(II). Although the synergistic coefficient by Cyanex 301 + TOPO was higher than that by LIX 63 + Alamine 336, the Pd(II) in the loaded mixture phase of LIX 63 and alamine 336 was easily stripped by thiourea.

show abstract

“…Due to its low natural abundance, high price and its increasing demands in various ordinary and technologically advanced fields of industry, the trend is to recover and refine Pd from various spent materials [6][7][8][9][10][11]. The palladium metal catalyst is usually consisted of a metal coat supported on -alumina, which is frequently used as a carrier (supported layer) for the Pd.…”

Section: Introductionmentioning

confidence: 99%

“…Separation process of Pd from solution was carried out by electroless deposition and electrodeposition techniques. In the electroless deposition technique, Pd is reduced from the solution using formalin, formic acid, aluminum powder, zinc powder, stannous chloride, hydrazine, ethylene glycol, or through bioreduction [11,[20][21][22][23][24][25][26][27][28] with Pd been deposited in spongy form. In the electrodeposition technique, Pd is deposited with smaller grain size and higher purity than during electroless deposition [29][30][31][32][33][34].…”

Section: Introductionmentioning

confidence: 99%

Hydrometallurgical Recovery of Nano-Palladium from Spent Catalyst

Barakat¹,

El-Mahdy²,

Hegazy³

et al. 2009

TOMPJ

View full text Add to dashboard Cite

Hydrometallurgical recovery of nano-palladium (Pd) from spent Pd/Al 2 O 3 catalyst has been investigated. The Pd content in the spent catalyst sample was assayed to be 0.42% while the remainder was mainly aluminum oxide. Mixture of HCl and AlCl 3 was studied as leaching agent for the sample. The Pd was deposited with formic acid. Different parameters affecting leaching and deposition processes such as, time, temperature, liquid/solid ratio, were investigated. Phase of spent catalyst were identified by X-ray diffraction (XRD) analysis. The deposited Pd was characterized by scanning electron microscope (SEM), transmission electron microscope (TEM) and energy dispersive X-ray (EDX) for identification of the grain size and composition. The deposited palladium was found to be in the nano-size range (34.5-70.5 nm).

show abstract

Recovery and separation of palladium from spent catalyst

Cited by 100 publications

References 5 publications

A green and simple method for preparation of an efficient palladium adsorbent based on cysteine functionalized 2,3-dialdehyde cellulose

A green and simple method for preparation of an efficient palladium adsorbent based on cysteine functionalized 2,3-dialdehyde cellulose

Extraction of Palladium(II) from Hydrochloric Acid Solutions by Solvent Extraction with Mixtures Containing Either Cyanex 301 or LIX 63

Hydrometallurgical Recovery of Nano-Palladium from Spent Catalyst

Contact Info

Product

Resources

About