Supported catalyst containing rhenium and aluminum process for the preparation thereof and use for the metathesis of olefins
AssigneeInstitut Fran.cedilla.ais du Petrole
InventorDominique Commereuc
Life of this patent
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Abstract
A supported catalyst with rhenium and also containing aluminium introduced by a compound of the formula (OR).sub.qAlR'.sub.r with R being a hydrocarbyl residue with from 1 to 40 carbon atoms, R' being an alkyl residue with from 1 to 20 carbon atoms, and with q and r equal to 1 or 2 with q+r=3. A process for the preparation of a catalyst comprising impregnating a compound of rhenium on a porous support formed by refractory oxides and/or alumino-silicates of an acid, neutral or basic nature, roasting at a temperature of form 200 to 950.degree. C. and impregnating with said aluminium compound. The catalyst is used for the metathesis of olefins.
Claims26
A catalyst comprising at least one inorganic porous support, from 0.01 to 20% by weight of rhenium in oxide form, and from 0.01 to 10% by weight of aluminum introduced in the form of an aluminum compound of the general formula (RO).sub.q AlR'.sub.r, wherein R is an aryl residue containing up to 40 carbon atoms, R' is an alkyl residue containing from 1 to 20 carbon atoms, and q and r are equal to 1 or 2 in such a way that the sum q+r is equal to 3.
A process for the preparation of a modified catalyst comprising a inorganic porous support, from 0.01 to 20% by weight of rhenium in oxide form, and from 0.01 to 10% by weight of aluminum, comprising preparing a roasted catalyst precursor containing at least one inorganic porous support and rhenium, contacting said precursor with a compound of the formula (RO).sub.q AlR'.sub.r wherein R is aryl of up to 40 carbon atoms, R' is an alkyl residue containing from 1 to 20 carbon atoms, and q and r are equal to 1 or 2 in such a way that q+r is equal to 3, and drying the product obtained at a temperature of less than 200.degree. C.
A process for the preparation of a modified catalyst comprising an inorganic porous support, from 0.01 to 20% by weight of rhenium in oxide form, and from 0.01 to 10% by weight of aluminium, comprising preparing a roasted precursor containing the inorganic porous support and rhenium, contacting said precursor with precursor reactants of the compound of the general formula (RO).sub.q AlR'.sub.r, wherein R is a hydrocarbyl residue containing from 1 to 40 carbon atoms, R' is an alkyl residue containing from 1 to 20 carbon atoms, and q and r are equal to 1 or 2 in such a way that q+r is equal to 3, and drying the product obtained at a temperature of less than 200.degree. C.
A catalyst comprising at least one inorganic porous support, from 0.01 to 20% by weight of rhenium in oxide form, and from 0.01 to 10% by weight of aluminum in the form of an aluminum compound of the general formula (RO).sub.q AlR'.sub.r, wherein R is an aryl residue comprising up to 40 carbon atoms, R' is an alkyl residue containing from 1 to 20 carbon atoms, and q and r are equal to 1 or 2 in such a way that the sum q+r is equal to 3.
Dependencies are inferred from the claim text.