| 摘要 |
PURPOSE:To provide a catalyst for catalytic hydrogenated dealkylation of alkyl arom. hydrocarbons, by depositing an Rh salt on an alumina carrier and calcining the same in an oxygen atmosphere then reducing and activating the same to Rh. CONSTITUTION:An aq. soln. of a halide such as chloride, bromide, iodide or the like of Rh or an inorg. acid salt, an org. scid salt or a complex compd. is coated on a slumina which is a carrier and the carrier is calcined for 1-10hrs at 200- 600 deg.C in an oxygen atmophere, as a catalyst to be used for dealkylation reaction of alkyl arom. hydrocarbons in the stage of producing benzene or oxylene. The coated material is then reduced to disperse the Rh on the alumina catalyst in the state of 10-20Angstrom average grain size when analyzed by a hydrogen adsorption method. Alkyl arom. hydrocarbons are subjected to dealkylation reaction by using such catalyst under the conditions of 5-30kg/cm<2>G pressure, 400-500 deg.C temp. 0.1-3.0vol./vol. per hour space velocity of liquid and 2-20mol/mol hydrogen/raw material ratio with the small amt. of the hydrogen to be used in a high yield. |
