REGENERATING METHOD FOR PLATINUM-TIN-BASED CATALYST

Japanese Patent JP3830203

B2

PROBLEM TO BE SOLVED: To easily regenerate a platinum-tin-based catalyst to a catalyst capable of maintaining activity and selectivity of the catalyst for a long period by controlling the temperature of a catalyst layer at the temperature not higher than a specific temperature in the case of burning carbonaceous substance stuck to the platinum-tin-based catalyst in existence of oxygen-containing gas. SOLUTION: In the case of regenerating a platinum-tin-based catalyst which is used for dehydrogenation reaction of hydrocarbon and accumulated with carbonaceous substance, the carbonaceous substance stuck to the platinum-tin- based catalyst is burned in existence of oxygen-containing gas. In this case, the temperature of a catalyst layer is controlled at 400°C and especially the temperature is controlled so that a change in temperature of the catalyst layer during combustion treatment is desirably within 100°C. Further, in the combustion process of carbonaceous substance, inert gas for the catalyst such as nitrogen, helium or argon, favorably oxygen-containing mixed gas in which nitrogen is used as dilution gas of oxygen is used. The concentration of oxygen in the mixed gas in the inlet of a reactor normally is 0.01-50vol% desirably 0.1-20vol%.

Hayato Hideto

JP12719696A

October 04, 2006

May 22, 1996

Click for automatic bibliography generation  

Mitsubishi Chemical Corporation

B01J23/62; B01J38/12; B01J23/96; C07B61/00; C07C5/333; C07C11/02; (IPC1-7): B01J38/12; B01J23/62; B01J23/96; C07C5/333; C07C11/02; //C07B61/00

JP7300433A
JP3014306B2
JP63065953A
JP46000706A
JP8501094A
JP7232065A
JP8059569A
JP7215925A
JP7206718A
JP62048650B2
JP3036575B2
JP7300431A

Tsuyoshi Shigeno
Hasegawa Soji

Previous Patent: SLIDINGLY MOVABLE WORK STAND

Next Patent: MEMO PAD CASE WHICH WORKS AS DISPENSER AS WELL