Title: Recovery of platinum via extracting waste catalysts
Application Number: 85100109 Application Date: 1985.04.01
Publication Number: 1001663 Publication Date: 1986.07.16
Approval Pub. Date: Granted Pub. Date: 1988.05.11
International Classifi-cation: B01D11/14,C22B1/04
Applicant(s) Name: Qinghua Univ. Address:
Inventor(s) Name: Xi Deli
Attorney & Agent: MU XIANGRONG
Abstract:
     The platinum content of the catalyst using r-alumina carrier is so low that the prior art of recovery of platinum is relatively complicated. The present invention concerns a new process based on the extraction of the waste catalyst. The extractant is bi-(2-ethyl hexyl)-sulfoxide, the recovery of platinum being more than gg.percent. This process is as following: calcination to remove accumulated carbon, leaching with hydrochloric acid, extraction of platinum, washing, back extraction, reduction of platinum with hydrazine hydrate and regeneration of the organic phase from back extraction.
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