EXHAUST GAS TREATMENT CATALYST, A METHOD FOR PREPARATION THEREOF, AND EQUIPMENT FOR EXHAUST GAS TREATMENT CATALYST Russian patent published in 2008 - IPC B01J23/56 B01J23/44 B01J37/03 B01D53/94 F01N3/10 

FIELD: gas treatment catalysts.

SUBSTANCE: method of preparing exhaust gas treatment catalyst comprises: (i) providing at least one type of compounds selected from carboxylic acids having hydroxy or mercapto group and number of carbon atoms from 2 to 20; dicarboxylic acids with 2 or 3 carbon atoms; and monocarboxylic acids with 1-20 carbon atoms; (ii) adding at least one compound selected from above group to aqueous sulfate solution including Al and rare-earth element; (iii) complete evaporation of aqueous carboxylic acid to produce carboxylic acid-based polymer complex; (iv) heating the latter to temperature no higher than 1000°C to form aluminum oxide; and (v) depositing palladium on thus obtained aluminum oxide. Described are also aluminum oxide as carrier for palladium wherein aluminum oxide is represented by PrAlO₃ or NdAlO₃ as well as exhaust gas treatment catalyst prepared by above-described method, wherein palladium is supported by LnAlO₃ (Ln: rare-earth metal), and equipment for exhaust gas treatment catalyst.

EFFECT: improved quality of running engine event at low temperature during starting or idling.

6 cl, 3 dwg, 3 tbl, 10 ex