公开(公告)号：US3821355A

公开(公告)日：1974-06-28

申请号：US25163472

申请日：1972-05-08

Applicant: ALLIED CHEM

Inventor： BANDYOPADHYAY B ,  BRUEN C ,  WAMSER C

IPC: C01B17/04 ,  C01B17/06 ,  C01B17/02 ,  C01B17/52

CPC classification number: C01B17/06 ,  C22B3/24 ,  Y02P10/234

Abstract: Pyrites tailings and smelter gas, by-products of smelters, are treated to recover iron values and elemental sulfur by a combination of: roasting the pyrites to produce elemental sulfur and iron sulfide; converting the iron sulfide with an acid cation exchange resin to liberate H2S and adsorb ferrous iron; reacting the smelter SO2 gas with a carbonyl compound to produce alpha hydroxy sulfonic acid; adding the a-hydroxy sulfonic acid to the cation exchange resin containing iron to regenerate the cation exchange resin, and recycling; heating the ferrous hydroxy sulfonate formed, to produce ferrous sulfite and liberate the carbonyl compound; calcining the ferrous sulfite to liberate SO2, producing by-product ferrous oxide, and reacting the liberated SO2 with the liberated H2S to produce elemental sulfur.