Chemistry of inorganic compounds – Modifying or removing component of normally gaseous mixture – Nitrogen or nitrogenous component
Patent
1993-01-26
1994-10-18
Straub, Gary P.
Chemistry of inorganic compounds
Modifying or removing component of normally gaseous mixture
Nitrogen or nitrogenous component
423372, 423375, 423376, C01C 314
Patent
active
053566033
ABSTRACT:
This invention is a method for producing hydrocyanic acid by using an element which comprises a foraminous structure fabricated from a material consisting essentially of a metal selected from the group consisting of platinum, rhodium, palladium and alloys of mixtures thereof characterized by (a) a novel configuration whereby the initial product of the formula: curve the flat ratio (C/F) multiplied by mesh size (N) and wire diameter (d.sub.w), for said element is greater than at least about 0.08 and (b) where, for a given methane and ammonia throughput, the conversion efficiency is a function of the curve to flat ratio (C/F), wire diameter (d.sub.w) and mesh size (N) combination and conversion efficiency is improved by increasing the mesh size (N) for a given wire diameter, increasing the wire diameter (d.sub.w) for a given mesh size, and increasing the curve to flat ratio (C/F) to a ratio of above 1.0. Preferably the initial product of the formula is greater than 0.2 and the curve to flat ratio (C/F) is above 1.0, most preferably above about .pi./2. The preferred initial product of the formula is in the range of from 0.08 to about 10 and more preferred from about 0.2, most preferred 0.9, to about 10. The preferred element is woven gauze, knitted fabric, fibers and combinations thereof. The element can be in a series of said elements as a plurality of screens.
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Heffernen Steven A.
Hochella William A.
Johnson Matthey Inc.
Straub Gary P.
Vanoy Timothy C.
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