Separation and Recovery of Platinum and Palladium from Spent Petrochemical Catalysts Using Activated Carbon, Analysis of Two Kind of Most Used Catalysts in Petro Chemistry

Document Type: Research Article


Institute of Water & Energy, Sharif University of Technology, P.O.Box 11155-8639 Tehran, I.R. IRAN


The goal of this work is the separation and recovery of platinum and palladium from spent catalyst. The recovery consisted of separating the maximum amount of platinum and palladium from catalysts and changing them into usable forms. The petroleum and petrochemical units use Pt and Pd catalyst for reactions such as reforming and hydrogenation. Because these materials contain valuable metals, such as Pt and Pd, these metals should be recycled. Based on economic reasons and the high price of new catalysts, petrochemical companies should solve this problem. The new method in this work may help to recover these metals from spent catalyst. This method may help solve several environmental problems. In this work, the recovery of platinum and palladium from petroleum catalysts has been studied using spent catalysts. Two catalysts were characterized by XRF, XRD, and AAS. Aqua regia, used as a leaching agent, and the effect of dissolution temperature and time, Liquid/Solid (L/S) ratio, size of particles, and elimination of coke were also investigated. Under optimized conditions, the leaching process was done with 98% efficiency. Recovery of platinum and palladium from the leached solutions was done by the adsorption process with Activated Carbon (AC) in an environmentally friendly manner. According to the results, the optimum operating conditions for platinum and palladium removal by activated carbon were a temperature of a solution of 85 and 98℃, pH = 0.5 and 2, time of adsorption 180 and 150 min and adsorbent loading capacity = 18.75 mgPt/gAC and 12.5 mgPd/gAC, respectively. The activated carbon containing platinum and palladium was decomposed by ignition to produce platinum and palladium powder with commercial purity of 96.5% and 96.3% respectively.


Main Subjects

[1] a) Tahriri Zangeneh F., Taeb A., Gholivand Kh., Sahebdelfar S., The Effect of Alkali Metal Promoters on the Stability and Coke Formation of Platinum-Based Propane Dehydrogenation Catalysts: A Kinetic Study, Iran. J. Chem. and Chem. Eng. (IJCCE), 32(4): 25-31 (2013).

[2] Lide D. R., “CRC Handbook of Chemistry and Physics” CRC Press: Florida, (2011).

[3] a) Howell Furman N., “Standard Methods Of Chemical Analysis” (6th Ed.); D.Van Nostrand: Canada, 870-880 (1962).

   b) Haghlesan A.N., Alizadeh R., Fatehifar E., Evaluation of Spent Catalyst Structure Changes during Ethylbenzene Dehydrogenation in Different Technologies, Iran. J. Chem. and Chem. Eng. (IJCCE),  36(1): 45-57 (2017).

[4] a) Howell Furman N., “Standard Methods Of Chemical Analysis” (6th ed.); D. Van Nostrand: Canada, 881-888, (1962).

     b) Gohani M., van Tonder J. H., Benzuidenhoudt B. C.B.,  NaHSO4-SiO2: An Efficient Reusable Green Catalyst for Selective C-3 Propargylation of Indoles with Tertiary Propargylic Alcohols, Iran. J. Chem. Chem. Eng. (IJCCE),  34(3): 11-17 (2015).

[5] aspx?AID=478#1318 , Available on October of 2010.

[6] a) Bartholomew C., Mechanisms of Catalyst Deactivation, Applied Catalysis A , 212: 17–60 (2001).

     b) Mohammadikhah R., Zahedi Abghari S., Ganji H., Ahmadi Marvast M., Improvement of Hydrodynamics Performance of Naphtha Catalytic Reforming Reactors Using CFD, Iran. J. Chem. Chem. Eng. (IJCCE),  33(3): 63-76 (2014).

[7] Jha M.C., Hill S.D., “Precious Metals ’89; The Minerals”, Metals & Materials Society: USA, 503 (1989).

[8] Hagelu¨ken C., Verhelst M., Recycling of Precious Metal Catalysts, Catalysis, 9: 21-  (2004).

[9] Suzuki S., Ogino M., Matsumoto T., Recovery of Platinum Group Metals at Nippon PGM Co. Ltd., MMIJ, 123: 734-      (2007).

[10]  Sebastião Guedes B.J., Afonso J.C., Processing of Spent Platinum-Based Catalysts via Fusion with Potassium Hydrogen Sulfate, Hazardous Materials, 184: 717-723 (2010).

[11] Jafarifar D., Daryanavard M.R., Sheibani S., Ultra Fast Microwave-Assisted Leaching for Recovery of Platinum from Spent Catalyst, Hydrometallurgy, 78: 166-171 (2005).

[12] Barakat M.A., Mahmoud M.H.H., Recovery of Platinum from Spent Catalyst, Hydrometallurgy, 72: 179-184 (2004).

[13] Jimenez de Aberasturi D., Pinedo R., Larramendi I., Recovery by Hydrometallurgical Extraction of
the Platinum Group Metals from Car Catalytic Converters
, Minerals Engineering, 24: 505-513 (2011).

[14] Marinho R.S., Afonso J.C., Recovery of Platinum from Spent Catalysts by Liquid–Liquid Extraction
in Chloride Medium
, Hazardous Materials, 179: 488-494 (2010).

[15] Angelidis T.N., Skouraki E., Preliminary Studies of Platinum Dissolution from a Spent Industrial Catalyst, Appl. Cat. A, 142: 387-395 (1996).

[17] Jha M.C., Hill S.D., “Precious Metals ’89”; The Minerals, Metals & Materials Society: USA, 483 (1989).

[18] Pinheiro A.A., Siqueira de Lima T., Recovery of Platinum from Spent Catalysts in a Fluoride-Containing Medium, Hydrometallurgy, 74: 77- 84 (2004).

b) Hwang S.Y., et al. & Grilc M., et. al., Chem. Cat. Chem., 8(1): 1–275 (2016).

[20] Ahmed I.M., Nayl A.A., Daou J.A., Extraction of Palladium from Nitrate Solution by CYANEX 471X. Mineral Processing, 101:89-93 (2011).

[21] Kim M., Kim E., Jeong J., Lee J-c, Kim W., Recovery of Platinum and Palladium from the Spent Petroleum Catalysts by Substrate Dissolution in Sulfuric Acid, Materials Transactions, 51: 1927-  (2010).

[22] Barakat M.A., Mahmoud M.H.H., Mahrous Y.S.,  Recovery and Separation of Palladium from Spent CatalystApplied Catalysis A, 301: 182-186 (2006).

[23] Lee J.Y., Raju B., Nagaphani Kumar B., Kumar B.N., Kumar R., Park H.K., Reddy R., Solvent Extraction Separation and Recovery of Palladium and Platinum from Chloride Leach Liquors of Spent Automobile Catalyst, Separation and Purification Technology, 73: 213-218 (2010).

[24] Swain B., Jeong J., Kim S., Lee J., Separation of Platinum and Palladium from Chloride Solution by Solvent Extraction Using Alamine 300, Hydrometallurgy, 104: 1-7 (2010). 

 [25] Lee J.Y., Kumar J.R., Kim J.S., Park H.K., Yoon H.S., Liquid–Liquid Extraction/Separation of Platinum(IV) and Rhodium(III) from Acidic Chloride Solutions Using Tri-iso-octylamine, Hazard. Mater., 168: 424-429 (2009).

[26] Sanuki S., Matsumoto Y., Majima H., Preparation of Ammonium Chloroplatinate by a Precipitation Stripping of Pt(IV)-Loaded Alamine 336 or TBP., Metall. Mater.Trans. B, 30: 197-203 (1999).

[28] Bader N., Catalyst Handling and Disposal Become More Important in Environmental Era, Oil Gas , 94: 64-       (1996).

[29] Stanislaus A., Cooper B.H., Aromatic Hydrogenation Catalysis – A Review, Catal. Rev. Sci. Eng., 36: 75-123 (1994).

[30] Aktas S., Morcali M.H., Platinum Recovery from Dilute Platinum Solutions Using Activated Carbon, Trans. Nonferrous Met. Soc. China, 21: 2554-2558 (2011).

[31] Sharififard H., Soleimani M., Zokaee Ashtiani F.,  Evaluation  of Activated Carbon and Bio-Polymer  Modified Activated Carbon Performance for  Palladium and Platinum Removal, Taiwan  Institute  of  Chemical  Engineers, 43: 696-703 (2012).

[32] Ruowen F., Zeng H., Lu Y., The Reduction of Pt(IV) with Activated Carbon Fibers - An XPS Study, Carbon, 33: 657-      (1995).

[33] Welz B., Sperling M.,” Atomic Absorption Spectrometry”, 3th ed.; John Wiley & Sons, Inc., New York, (538) (1999).

[34] Welz B., Sperling M., “Atomic Absorption Spectrometry”, 3th ed.; John Wiley & Sons, Inc., New York, (540) (1999).

[35] Westgard J.O., Quam E. , “Basic Method validation”, 3th ed., Westgard QC: New York, lesson 27 (2008).

[37] Birinci E., Gülfen M, Osman Aydın A., Separation and Recovery of Palladium(II) from Base Metal Ions by Melamine Formaldehyde–Thiourea (MFT) Chelating Resin, Hydrometallurgy, 95: 15-21 (2009).

[38] Santos Marinhoa R., et al., Recovery  of Platinum, Tin and Indium from Spent Catalysts in Chloride Medium Using Strong Basic Anion Exchange  Resins, Hazardous  Materials , 192: 1155-1160 (2011).

[39] Rich R.L., Inorganic Reactions in Water, 1st ed.; Springer: Bluffton, Page 417 (2007).

[40] acid-industrial- grade_947082551.html?s=p, available on Sep. 2014

[41], available on Sep. 2014