METHOD OF PRODUCTION OF THE PLATINUM CATALYST USED FOR PURIFICATION OF THE EXHAUST GASES OF THE INTERNAL COMBUSTION ENGINES Russian patent published in 2007 - IPC B01J37/25 B01J23/42 B01J21/04 

FIELD: chemical industry; other industries; methods of production of the platinum catalysts.

SUBSTANCE: the invention is pertaining to the method of production of the platinum catalyst used for purification of the exhaust gases of the internal combustion engines. The invention presents the description of the method of manufacture of the catalyst for purification of the exhaust gases of the internal combustion engines including deposition of the aluminum oxide layer containing the catalytically active component - platinum on the inert steel carrier containing 15-23 % of chromium and 4.5-5.1 % of aluminum, with the subsequent drying and calcinations. At that before deposition of the aluminum oxide layer containing the catalytically active component - platinum the inert steel carrier is subjected to etching in the hydrochloric acid diluted with the water in the ratio of 1:1 within 25-35 seconds at the temperature of 20-25°С with the subsequent washing by the running and distilled water and the further heat treatment in the air at the temperature within the interval of 850-950°С for 10-20 hours, then it is subjected to the treatment with the ultrasound with the frequency of 18 kHz within 1-2 minutes and with the subsequent treatment of the surface of the inert steel carrier in the KOH alkaline solution with concentration of 10 % within 30-60 minutes for transformation of the oxides of the surface layer into the hydroxides. The technical result of the invention is simplification of the production process.

EFFECT: the invention ensures simplification of the production process.

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