Nitrogen oxide and hydrocyanic acid production method

Abstract

A metal fiber based on one or several elements from the group of platinum, palladium, rhodium, ruthenium, and iridium with 0 to 30% by weight of one or several additional alloy elements from the group of nickel, cobalt, gold, rhenium, molybdenum, and tungsten, contains 1 to 500 ppm by weight of boron or phosphorus. A non-woven material or netting, in particular for the production of nitrogen oxide or for the production of hydrocyanic acid, is made of such fibers. For the production of fibers based on noble metals having up to 30% by weight of additional alloy metals by drawing the fibers from a melt, the melting point of the metal is reduced by at least 400° C., before drawing of the fibers, by additionally alloying with boron or phosphorus, and the boron or the phosphorus is removed again from the fibers.

1 . A method for production of nitrogen oxide or hydrocyanic acid, the method comprising using a non-woven material or netting as a catalyst, wherein the non-woven material or netting comprises metal fibers based on one or more elements selected from the group consisting of platinum, palladium, rhodium, ruthenium, and iridium with 0 to 30% by weight of one or more additional alloy elements selected from the group consisting of nickel, cobalt, gold, rhenium, molybdenum, and tungsten, and wherein the metal fibers contain 1 to 500 ppm by weight of boron or phosphorus.