PROCESS FOR ISOMERIZING DEHYDRATION OF NON-LINEAR PRIMARY MONOALCOOL ON A FERRY-TYPE QUADRILOBE ZEOLITHIC CATALYST

摘要

The invention relates to an isomerization dehydration process in the presence of a particular catalyst, to produce at least one alkene. The process is carried out on a feedstock comprising a nonlinear primary monoalcohol, taken alone or as a mixture. The catalyst comprises at least one zeolite having at least one series of 8MR channels and comprises a binder, preferably a silicic binder, having a pore volume of between 0.5 and 0.9 ml / g. The catalyst has a multilobe form and a mean mesoporous volume Vm centered at plus or minus 20% around the value defined by the formula Vm = -0.004Tz + 0.505, the mesopores having a diameter of 3.6 nm at 50 nm, a average macroporous volume VM centered at plus or minus 20% around the value defined by the formula VM = 0.0101Tz - 0.5375, the macropores having a diameter greater than 50 nm and less than 7000 nm, a mean microporous volume Vμ centered to plus or minus 20% around the value defined by the formula Vμ = 0.0014Tz - 0.0006, the micropores having a diameter of less than 2 nm, in the formulas, Tz being the weight content of zeolite of the catalyst, expressed in % wt, and the pore volumes being expressed in ml / g. The catalyst has an exposed geometric area of 2700 to 11000 m2 / m3 of catalyst bed volume.