Recovering method of catalytic component and carrier from waste catalyst
OwnerTakeshi Okutani, Yoshinori Nakata +2inventors
InventorsTakeshi Okutani, Yoshinori Nakata, Masaaki Suzuki, Takeo Akiyama
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Abstract
Disclosed is a recovering method of a catalytic substance and a carrier from a waste catalyst which comprises subjecting the waste catalyst composed of a catalyst prepared by supporting a catalytic substance on a carrier composed of pourous silicon carbide to chlorinating treatment and then recovering the catalytic substance and the carrier in the form of chlorides.
Claims6
A method of recovering a catalytic substance comprising at least one noble metal and a carrier from a waste catalyst composed of a catalyst prepared by supporting a catalytic substance on a carrier composed of porous silicon carbide which comprises the steps of:
- adding a potassium salt selected from the group consisting of potassium chloride (KCl), potassium hydrogen sulfide (KHSO.sub.4), potassium sulfate (K.sub.2 SO.sub.4) and potassium nitrate (KNO.sub.3) to the waste catalyst in an amount of 0.1 to 2% by weight based on the weight of the waste catalyst,
- subjecting the mixture to a chlorinating treatment at a temperature of about 600.degree. to 1000.degree. C. and then
- recovering the catalytic substance and the carrier in the form of chlorides.
Dependencies are inferred from the claim text.