CATALYST (VERSIONS) AND METHOD OF RECOVERING SULFUR DIOXIDE FROM SULFUR-CONTAINING GASES (VERSIONS) Russian patent published in 2012 - IPC B01J23/889 B01J23/745 C01B17/48 C01B17/04 

FIELD: process engineering.

SUBSTANCE: invention relates to catalysts for recovery of sulfur dioxide from sulfur-containing gases. Proposed catalyst comprises active components based on ion and manganese compounds. Note here that said active compounds represent iron-manganese nodules and features the following composition in terms of oxides, in wt %: Fe₂O₃ - 20.0-35.0; MnO₂ - 20.0-35.0; SiO₂ - 17.0-25.0; Al₂O₃ - 5.0-10.0; Na₂O - 2.0-5.0; K₂O - 1.5-5.0; MgO - 1.5-3.0; CaO - 1.5-3.0; P₂O₅ - 3.0-10.0. Proposed catalyst comprises active components based on ion and manganese compounds. Note here that said active compounds represent iron-manganese nodules, while binder represents aluminium hydroxide or natural clays and features the following composition in terms of oxides, in wt %: Fe₂O₃ - 14.0-30.0; MnO₂ -14.0-30.0; SiO₂ - 12.0-22.0; Al₂O₃ - 20.0-40.0; Na₂O - 1.5-4.0; K₂O - 1.0-4.0; MgO - 1.0-2.5; CaO - 1.0-2.5; P₂O₅ - 2.0-8.5.

EFFECT: high catalytic activity at moderate temperatures.

12 cl, 2 tbl, 8 ex