| 摘要 |
PURPOSE:To restore the activity of a used platinum group metallic catalyst with a carrier quickly without damaging the same, by holding said catalyst in a vessel having network structure and treating the same in two stages with an aq. inorg. alkali soln. and an aq. soln. of hydrazine or the like. CONSTITUTION:The platinum group metallic catalyst with a carrier used in steam reforming of hydrocarbon, etc. is incorporated in vessels 3a, 3b, 3c in a regeneration device 1 of which at least the top and bottom surfaces are made into network structure so that the catalyst is restrained and held therein. An aq. soln. of the hydroxide, carbonate, nitrate, sulfate, etc. of alkaline (earth) metals is supplied from a tank 6 through a line 7, a pump 9 and a line 11 into the containers to regenerate the catalyst. The treating liquid is circulated through a line 13 to a tank 5. The catalyst is treated with an aq. soln. of hydrazine, formaldehyde or hydrogenated sodium borate by using the similar device. The catalyst does not flow freely according to the above-mentioned method and therefore the nonuniform regeneration is prevented. |
