B - Operations – Transporting – 01 – J
Patent
B - Operations, Transporting
01
J
B01J 29/46 (2006.01) B01D 53/86 (2006.01) B01D 53/94 (2006.01) B01J 29/40 (2006.01) B01J 37/02 (2006.01) B01J 29/82 (2006.01)
Patent
CA 2244095
A method of manufacturing a catalyst for purifying exhaust gas, the catalyst including a pentasil-type crystalline aluminosilicate catalyst carrier carrying thereon a copper component and a phosphorus component. The method is characterized by adding the catalyst carrier into a solution containing a copper component and a phosphorus component, or a buffer and having a predetermined pH adjusted with ammonia, and subsequently adding an acid to the solution so as to adjust the pH of the solution to 7.0 or less, to thereby incorporate the copper component and the phosphorus component into the catalyst carrier. According to the present invention, a catalyst for removing exhaust gases which is durable and which has a high NO x removal factor can be prepared in a stable manner.
Un constituant cuivre et un constituant phosphore sont placés sur un support de catalyseur qui contient un aluminosilicate cristallin du type pentasil. On produit ce support de catalyseur en plongeant un support dans une solution qui contient le constituant cuivre et le constituant phosphore ou un agent tampon et dont la valeur du pH est réglée avec de l'ammoniac, puis en ajoutant un acide à ladite solution pour régler le pH sur une valeur qui n'est pas supérieure à 7,0. On produit ainsi un catalyseur d'épuration des gaz d'échappement ayant une excellente durabilité et un taux élevé d'élimination de l'oxyde d'azote.
Kawashima Yoshimi
Kisen Tadashi
Idemitsu Kosan Company Limited
Smart & Biggar
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