METHOD TO PREPARE CATALYST FOR DETOXICATION OF EXHAUST GASES (VERSIONS) Russian patent published in 2010 - IPC B01J23/40 B01J21/00 B01J29/12 B01J37/02 B01J35/04 B01D53/94 

FIELD: process engineering.

SUBSTANCE: invention relates to production of catalysts applied onto porous oxide carriers for detoxication of exhaust gases. In compliance with one version, proposed method consists in that oxide carriers or their mixes with zeolites are treated by aqueous solutions of acetic acid with concentration varying from 15% to 98% by volume, dried and impregnated with aqueous solutions of noble metal nitrates. In compliance with second version, proposed method comprises impregnation of oxide carriers with aqueous solutions of noble metal nitrates. Note here that acetic acid is incorporated into impregnation solutions. In compliance with third version, wet applied catalysts can be processed into coat dispersion without preliminary roasting. Coat is then applied onto one-piece cellular element to be dried and roasted in airflow. Produced catalysts are used detoxication of automotive exhaust gases and those from stationary industrial plants.

EFFECT: production of catalysts containing mixed metal oxide particles of noble metals with adjustable grain size.

18 cl, 11 ex, 2 tbl