<p>A catalyst for purifying an exhaust gas comprising a zeolite catalyst ion-exchanged with a transition metal, which is heat-treated in a gas stream containing a sulfur oxide, optionally followed by washing with a glycol. <IMAGE></p>
申请公布号
EP0463626(A1)
申请公布日期
1992.01.02
申请号
EP19910110697
申请日期
1991.06.27
申请人
TOYOTA JIDOSHA KABUSHIKI KAISHA
发明人
TAKESHIMA, SHINICHI, TOYOTA JIDOSHA K. K.;TANAKA, TOSHIAKI, TOYOTA JIDOSHA KABUSHIKI KAISHA;OISHI, KIYOHIKO, TOYOTA JIDOSHA KABUSHIKI KAISHA;INOUE, TOKUTA, TOYOTA JIDOSHA KABUSHIKI KAISHA