PACKET OF CATALYST GRIDS FOR CONVERTING AMMONIA Russian patent published in 2009 - IPC B01J23/42 B01J35/04 C01B21/26 

FIELD: chemistry.

SUBSTANCE: invention relates to a packet of catalyst grids for converting ammonia in a gas mixture containing oxygen, made from platinoid alloys, and can be used in nitric and hydrocyanic acid, as well as hydroxylaminosulphate plants. The packet of catalyst grids for converting ammonia in a gas mixture containing oxygen, includes a grid layer made from platinoid alloys with low 70 to 85% and high 90 to 95% concentration of platinum, distinguished by that, the packet consists of three layers, where the first layer along the path of the gas mixture has grids made from an alloy with low concentration of platinum, the number of which is 1/6 to1/3 of the total number of grids in the packet, the second layer has grids made from an alloy with high concentration of platinum, numbering from 1/3 to 2/3 of the total number of grids in the packet, and the third layer has grids made from an alloy with low and/or with high concentration of platinum.

EFFECT: invention allows for reducing mass of platinoids, included in the packet of catalyst grids and their loss when using the packet without reducing degree of conversion of ammonia to the target product.

4 cl, 18 ex, 2 tbl, 1 dwg