Process and Application of Recovering Platinum from Used Liquid-phase Catalysts by Solvent Extraction with Thiourea

doi:10.3724/SP.J.1095.2011.00693

Chinese Journal of Applied Chemistry ›› 2011, Vol. 28 ›› Issue (11): 1337-1339.DOI: 10.3724/SP.J.1095.2011.00693

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Process and Application of Recovering Platinum from Used Liquid-phase Catalysts by Solvent Extraction with Thiourea

QIN Gaofei^1,2, ZHOU Ying¹, LUO Qin³, JIANG Wenwei^1*, WANG Jide² ,YANG Qin³

(1.School of Chemistry and Chemical Engineering,Sichuan University,Chendu 610200;
2.School of Chemical Engineering,Xinjiang University,Urumqi;
3.Chengdu Hui′en Fine Chemical Co.,Ltd.,Chengdu)

Received:2010-11-22 Revised:2011-01-10 Published:2011-11-10 Online:2011-11-10
Contact: Jiang Wenwei

Abstract

Abstract:

The Pt ion was extracted in the deactived catalyst for the hydrochlorination reaction of ethyne by acidic thiourea solution. The result shows that the extraction ratio is over 98% when the extraction phase volume ratio approaches 1, the concentration of thiourea is 0.2 mol/L and hydrochloric acid concentration is between 0.5 and 0.6 mol/L. Besides, there are some advantages such as keeping the organic phase composition. Organic phase can be reuses, and the ethyne conversion ratio is over 70% by using the fresh catalyst in the same organic phase.

Key words: Acidic thiourea solution, liquid-phase catalysts, solvent extraction, platinum

CLC Number:

O614

QIN Gaofei1,2, ZHOU Ying1, LUO Qin3, JIANG Wenwei1*, WANG Jide2 ,YANG Qin3. Process and Application of Recovering Platinum from Used Liquid-phase Catalysts by Solvent Extraction with Thiourea[J]. Chinese Journal of Applied Chemistry, 2011, 28(11): 1337-1339.

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Process and Application of Recovering Platinum from Used Liquid-phase Catalysts by Solvent Extraction with Thiourea

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