IMPROVED CATALYST FOR SELECTIVE OXIDATION OF HYDROGEN SULPHIDE Russian patent published in 2020 - IPC B01J35/00 B01J21/08 B01J23/745 B01D53/86 

FIELD: chemistry.

SUBSTANCE: present invention relates to selective oxidation of sulphur-containing compounds, particularly hydrogen sulphide. Invention relates to a fixed catalyst bed for selective oxidation of hydrogen sulphide with oxygen, wherein said composite catalyst layer comprises a first catalyst layer and a second catalyst layer, where the first catalyst layer comprises first catalyst particles which contain a first support material containing silica and a first metal oxide containing Fe₂O₃ and a second catalyst layer comprising second catalyst particles which contain a second support material containing silica and a second oxide metal containing Fe₂O₃, where said particles of first catalyst have higher loading of Fe₂O₃ with respect to total weight of first catalyst particles than loading Fe₂O₃ for said particles of second catalyst in terms of total weight of particles of second catalyst, wherein said Fe₂O₃ charge for second catalyst particles is less than 3 % based on the total weight of said second catalyst particles, and said loading Fe₂O₃ particles of the first catalyst is in range of 5–10 % based on the total weight of the particles of the first catalyst, and wherein the volume of the first catalyst layer is 15–50 vol. % of the total volume of the catalyst layer, and volume of layer of second catalyst is 50–85 vol. % of total volume of catalyst layer. Invention also relates to a method and apparatus for selective oxidation of hydrogen sulphide.

EFFECT: technical result of the invention is higher output and selectivity without using a lower volumetric rate.

7 cl, 4 ex, 4 tbl