公开(公告)号：US06444185B1

公开(公告)日：2002-09-03

申请号：US09635884

申请日：2000-08-10

申请人： Jean Nougayrede ,  André Philippe ,  Sabine Savin-Poncet

发明人： Jean Nougayrede ,  André Philippe ,  Sabine Savin-Poncet

IPC分类号： C01B1704

CPC分类号： C01B17/0456 ,  B01D53/8606 ,  B01D53/8612 ,  B01D53/8615 ,  C01B17/0469

摘要： A process is provided to recover residual H2S, SO2, COS and CS2 in the tail gas from a sulphur recovery process. The tail gas is oxidized and hydrolyzed at a temperature of from 180° C. to 700° C. to provide an oxidized and hydrolyzed gas stream containing substantially no COS or CS2 and having a concentration by volume of H2S and SO2 such that the H2S concentration minus twice the SO2 concentration is from 0.25% to 0.5%. Then the gas stream from the hydrolysis is passed over a Claus catalyst, for example based on alumina and/or titanium oxide, for the reaction of H2S with SO2 to form sulphur and provide a gas stream with substantially no SO2. The resulting gas stream from the Claus reaction together with a gas containing free oxygen is then passed over an oxidation catalyst, such as one of more oxides or salts of Ni, Co, Fe, Cu, Ag, Mn, Mo, Cr, W or V, deposited on a support, such as bauxite, activated aluminia, silica, titanium oxide, zirconium oxide, zeolite or activated carbon to form sulphur and release a purified gas stream containing substantially no sulphur compounds.

摘要翻译： 提供了一种从硫回收过程中回收尾气中残留的H 2 S，SO 2，COS和CS 2的方法。 尾气在180℃至700℃的温度下被氧化和水解，以提供基本上不含COS或CS2并具有体积浓度的H 2 S和SO 2的氧化和水解气流，使得H 2 S浓度 减去SO2浓度的两倍是0.25％至0.5％。 然后将来自水解的气流通过克劳斯催化剂，例如基于氧化铝和/或氧化钛，以使H 2 S与SO 2反应形成硫并提供基本上不含SO 2的气流。 然后将来自克劳斯反应的所得气流与含游离氧气的气体一起通过氧化催化剂，例如Ni，Co，Fe，Cu，Ag，Mn，Mo，Cr，W或更多的氧化物或其盐之一， V，沉积在载体上，例如铝土矿，活性氧化铝，二氧化硅，氧化钛，氧化锆，沸石或活性炭，以形成硫并释放基本上不含硫化合物的纯化气流。