公开(公告)号：US20180008930A1

公开(公告)日：2018-01-11

申请号：US15539257

申请日：2015-12-23

Applicant: PROSERNAT

Inventor： Michael HEISEL ,  Benoit MARES

IPC: B01D53/86 ,  B01D53/52 ,  C10L3/10 ,  B01D53/90 ,  C01B17/04

CPC classification number: B01D53/8612 ,  B01D53/52 ,  B01D53/869 ,  B01D53/90 ,  B01D2251/11 ,  B01D2255/20707 ,  B01D2255/2092 ,  B01D2257/30 ,  B01D2257/304 ,  B01D2257/308 ,  B01D2258/05 ,  C01B17/0404 ,  C01B17/0413 ,  C01B17/0426 ,  C01B17/0447 ,  C10L3/103 ,  C10L2290/58 ,  C10L2290/60

Abstract: A process for the removal of hydrogen sulfide and sulfur recovery from a H2S-containing gas stream by catalytic direct oxidation and Claus reaction through two or more serially connected catalytic reactors, wherein a specific control of the oxygen supplement is operated. The control and improvement of the process is obtained by complementing, in each major step of the process, the H2S-containing gas stream by a suitable flow of oxygen, namely before the H2S-containing gas stream enters the Claus furnace, in the first reactor of the process and in the last reactor of the process. Especially in application in a SubDewPoint sulfur recovery process the H2S/SO2 ratio is kept constant also during switch-over of the reactors R1 and R by adding the last auxiliary oxygen containing gas directly upstream the last reactor R so that the H2S/SO2 ratio can follow the signal of the ADA within a few seconds.