Patent ID: 6267941
Filing Date: 2001-07-31
Classification: A61L,B01D

Abstract:
A method for deodorization of a gas stream of waste materials including malodorous sulfur-containing compounds of low oxidation state mixed with air and one or more aldehydes, alcohols and/or hydrocarbon compounds, comprising the steps in sequence of(1) bringing said gas stream to be deodorized into contact with a pretreating catalyst comprising an oxide of a metal selected from the group consisting of vanadium, chromium, manganese, iron, cobalt, nickel, copper and a mixture thereof, whereby to convert the malodorous sulfur compounds of low oxidation state which are contained in said gas stream into non-malodorous sulfur compounds of high oxidation state, and(2) bringing the gas from step (1) into contact with a noble metal catalyst.