CATALYST FOR GAS PURIFICATION

摘要

PURPOSE:To improve catalytic activity and thermal characteristic by wash- coating a carrier by adding a liquid composition of colloidal rare earth element and/or activated alumina to a liquid composition of colloidal noble metal- alumina. CONSTITUTION:Soluble noble metallic salt is reduced by being adsorbed to an alumina hydrate, and then mixed with an acidic material such as acetic acid. This mixture is dried and then deflocculated to obtain a colloidal noble metal- alumina liquid composition. To this formation, a colloidal rare earth element liquid composition and/or activated alumina is added and a carrier is wash- coated. The catalyst produced as mentioned above has superior catalytic activity and thermal chracteristics.