摘要:
The invention relates to a catalyst including a mesoporous oxide matrix, said matrix including at least one oxide of an element X selected from among silicon and titanium, taken alone or in a mixture, said catalyst including at least the element tantalum and the element niobium, the mass of tantalum making up from 0.1 to 30% of the mass of the mesoporous oxide matrix, the mass of niobium making up from 0.02 to 6% of the mass of the mesoporous oxide matrix, the mass content of the element tantalum being no lower than the mass content of the element niobium. The invention also relates to the use of said catalyst in a method for producing 1,3-butadiene from a feedstock including at least ethanol.
摘要:
The invention relates to a catalyst including at least the element tantalum, and at least one mesoporous oxide matrix having undergone acid leaching, including at least, before leaching, 90 wt % of silica, the mass of the element tantalum making up from 0.1 to 30% of the mass of said mesoporous oxide matrix.
摘要:
The invention relates to a mesoporous mixed-oxide catalyst including silicon and at least one metal M chosen from the group made up of the elements of groups 4 and 5 of the periodic table and the mixtures thereof, the mass of metal M making up from 0.1 to 20% of the mass of the mixed oxide. The catalyst is preferably prepared by the modern metal-organic sol-gel process. The invention also relates to the use of the catalyst to convert ethanol into butadiene.
摘要:
The invention relates to a catalyst including at least the element tantalum, at least one aldol-reaction element and at least one mesoporous oxide matrix, the mass of tantalum making up from 0.1 to 30% of the mass of the mesoporous oxide matrix, the mass of the at least one aldol-reaction element making up from 0.02 to 4% of the mass of the mesoporous oxide matrix, and to the use thereof to convert ethanol into butadiene.
摘要:
The invention relates to a process for producing 1,3-butadiene from an ethanol-rich feedstock, i.e. in which the ethanol represents more than 50% of the total weight of said feedstock, comprising at least: A) a step of converting at least said ethanol-rich feedstock and the ethanol effluent resulting from the separation step B into a conversion effluent predominantly comprising 1,3-butadiene, water and ethylene, and into a hydrogen effluent, operating at a pressure between 0.1 and 1.0 MPa, at a temperature between 300°C and 500°C in the presence of at least one catalyst; B) a step of separating at least said conversion effluent resulting from A and the hydration effluent resulting from C into at least an ethanol effluent, a butadiene effluent, a water effluent and an ethylene effluent; C) an ethylene hydration step supplied at least by said ethylene effluent and/or said water effluent both resulting from the separation step B, in order to produce a hydration effluent comprising ethanol, said hydration effluent then being recycled to the separation step B.
摘要:
A catalyst is described that comprises at least one IZM-2 zeolite, at least one matrix and at least one metal chosen from metals from groups VIII, VIB and VIIB, said zeolite having a chemical composition, expressed on an anhydrous basis, in terms of moles of oxides, by the following general formula: XO 2 :aY 2 O 3 :bM 2/n O in which X represents at least one tetravalent element, Y represents at least one trivalent element and M is at least one alkali metal and/or alkaline-earth metal of valency n, a and b respectively representing the number of moles of Y 2 O 3 and M 2/n O and a is between 0.001 and 0.5 and b is between 0 and 1.
摘要:
The invention relates to a method for the production of a diesel and middle distillate cut from an olefin feed having between 4 and 6 carbon atoms, said method including a first purification step performed on a resin, followed by an oligomerisation step performed on an acid catalyst.