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.%用酸性硫脲溶液萃取乙炔氢氯化失活催化剂中的铂离子,得到最佳回收的工艺参数,当萃取相比(A/O)为1,硫脲浓度为0.2 mol/L,盐酸浓度为0.5～0.6 mol/L时,萃取率达到98％以上；萃取后的有机相性质无改变,可重复使用,一次萃取后合成催化剂可使乙炔转化率达70％以上.
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