B - Operations – Transporting – 01 – J
Patent
B - Operations, Transporting
01
J
53/168, 23/210,
B01J 20/02 (2006.01) B01D 7/02 (2006.01) C22B 7/00 (2006.01) C22B 11/02 (2006.01)
Patent
CA 1190913
ABSTRACT OF THE DISCLOSURE A procedure Is provided for the recovery of precious metal lost from precious metal-containing catalysts, for example, the precious metal- containing catalysts which are used in the production of nitric acid by ammonia oxidation. In more detail, a getter for recovery of precious metal lost from a precious metal-containing catalyst operating at elevated tempera- ture comprises an agglomeration or assemblage of unwoven, randomly oriented, fibres made from a metal selected from the group consisting of ruthenium, palladium, iridium, platinum, gold, silver, and rhodium or alloys contain- ing one or more of these metals. The fibre agglomerate so provided has been found to give a performance at least equivalent to, and generally better than, that of conventional getter gauze packs in the manufacture of nitric acid. Further, use of the agglomerates showed considerable metal saving compared with the use of standard getter guazes. The use of fibres overcomes the tedious and expensive process of fine wire drawing and weaving.
400901
Borden Ladner Gervais Llp
Johnson Matthey Public Limited Company
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