METHOD FOR MANUFACTURING CATALYST FOR PURIFYING EXHAUST GAS AND CATALYST FOR PURIFYING EXHAUST GAS

摘要

PROBLEM TO BE SOLVED: To provide a method for manufacturing a catalyst for purifying exhaust gas for easily and sufficiently controlling the carriage and distribution of noble metals, and for making a multi-metal oxide carrier carry noble metals by distributing it in a high level, and for sufficiently suppressing the exudation of NOx in the case of rich spike, and for efficiently and surely manufacturing the catalyst for developing sufficient NOx occulusion performance even in the case of long time use and a catalyst for purifying exhaust gas to be acquired by the manfufacturing method.

SOLUTION: This method for manufacturing a catalyst for purifying exhaust gas including a multi-metal oxide carrier containing two or more types of multi-metal oxides and noble metals carried by the multi-metal oxide carrier comprises a process for acquiring an organic attached carrier by preferentially attaching an organic substance to a portion of metallic oxide in the multimetal oxide carrier; a process for acquiring a catalyst precursor by making the organic substance attached carrier carry the noble metals; and a process for acquiring the catalyst for purifying exhaust gas by sintering the catalyst precursor.

COPYRIGHT: (C)2008,JPO&INPIT