| 摘要 |
PURPOSE:To draw waste catalyst out of reactor safely and simply by subjecting waste catalyst used in the catalytic reaction of hydrocarbons to a wetting treatment using water or mineral oil containing lactones. CONSTITUTION:In case catalyst is drawn out of a heavy oil direct desulfurization apparatus, for example, the catalyst and the inside of the apparatus is cleansed by using light oil, and then 1wt% gamma-bromolactone is added to the light oil after the cleaning operation while leaving the cleaning temperature and pressure intact. And, another 8-hour continuous circulation is made and the operation is stopped, and then the light oil, etc. is drawn out of the catalyst-packed reactor sufficiently and catalyst is taken out of the reactor. In this case, since the catalyst is drawn out in a loosened soft state, no scattering of dust occurs and also no ignition takes place. Also, the drawn light oil has no offensive odor and also can be reused. |
