Patent ID: 6110440
Filing Date: 2000-08-29
Classification: B01J,C01C,C07C

Abstract:
A fluidized-bed reactor for ammo-oxidation or oxidation comprising a vessel, a sparger for supplying and dispersing a gas containing an organic material, and a distributor for supplying and dispersing an oxygen-containing gas, said sparger comprising at least one header and a plurality of dispersion pipes connected laterally to said header, said header entering the vessel through a side of the vessel, said dispersion pipes each having a plurality of orifices, so that hole sizes of the orifices are specified by an average diameter based on an area of a percentage of the orifices,wherein the hole size of an orifice farthest from said header is larger than the hole size of an orifice nearest said header, and the hole size of one orifice is larger than or equal to the hole size of an adjacent orifice that is nearer said header than said one orifice, andwherein a ratio of a maximum hole size orifice to a minimum hole size orifice is in a range of from 1.02 to 1.3, wherein a number of orifices of a given size is different for the dispersion pipe located farther from where the header enters the vessel than for the dispersion pipe located nearer to where the header enters the vessel, so that a first dispersion pipe located farther from where the header enters the side of the vessel, when compared to a second dispersion pipe located closer to where the header enters the side of the vessel, wherein both said first and second dispersion pipes have a same length, the number of the maximum size orifices of said first dispersion pipe is equal or larger than the number of the maximum size orifices of said second dispersion pipe.