Olefin metathesis method using a catalyst containing aluminum and molybdenum
First Claim
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1. A process for the metathesis of olefins carried out by bringing the olefins into contact with a catalyst comprising a mesoporous matrix and at least the elements molybdenum and aluminium, said elements being incorporated into said matrix using at least one precursor comprising molybdenum and aluminium, in which the catalyst is prepared by dry impregnation according to the process comprising the following stages:
- a) solubilization of the precursor comprising molybdenum and aluminium in a volume of solution corresponding to the pore volume of a preformed mesoporous matrix based on oxide,b) impregnation of the preformed mesoporous matrix based on oxide with the solution obtained in stage a), optional maturation of the solid thus obtained,c) optional stage of drying, calcination and/or steam treatment of the solid obtained at the end of stage b), in a temperature range from 50°
C. to 1000°
C., andd) stage of thermal activation of the solid obtained at the end of stage c), in a temperature range from 100°
C. to 1000°
C.
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Abstract
The invention relates to a process for the metathesis of olefins implemented with a catalyst comprising a mesoporous matrix and at least the elements molybdenum and aluminum, said elements being incorporated into said matrix by means of at least one precursor comprising molybdenum and aluminum.
1 Citation
25 Claims
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1. A process for the metathesis of olefins carried out by bringing the olefins into contact with a catalyst comprising a mesoporous matrix and at least the elements molybdenum and aluminium, said elements being incorporated into said matrix using at least one precursor comprising molybdenum and aluminium, in which the catalyst is prepared by dry impregnation according to the process comprising the following stages:
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a) solubilization of the precursor comprising molybdenum and aluminium in a volume of solution corresponding to the pore volume of a preformed mesoporous matrix based on oxide, b) impregnation of the preformed mesoporous matrix based on oxide with the solution obtained in stage a), optional maturation of the solid thus obtained, c) optional stage of drying, calcination and/or steam treatment of the solid obtained at the end of stage b), in a temperature range from 50°
C. to 1000°
C., andd) stage of thermal activation of the solid obtained at the end of stage c), in a temperature range from 100°
C. to 1000°
C. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15)
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16. A process for the metathesis of olefins carried out by bringing the olefins into contact with a catalyst comprising a mesoporous matrix and at least the elements molybdenum and aluminium, said elements being incorporated into said matrix using at least one precursor comprising molybdenum and aluminium, in which the catalyst is prepared by impregnation in excess according to the process comprising the following stages:
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a′
) solubilization of the precursor comprising molybdenum and aluminium in a volume of solution corresponding to between 1.5 and 20 times the pore volume of the preformed mesoporous matrix based on oxide,b′
) impregnation of the preformed mesoporous matrix based on oxide, with the solution obtained in stage a′
), filtration and recovery of the solid, optional maturation of the solid thus obtained,c′
) optional stage of drying, calcination and/or steam treatment of the solid obtained at the end of stage b′
) in a temperature range from 50°
C. to 1000°
C., andd′
) stage of thermal activation of the solid obtained at the end of stage c′
) in a temperature range from 100°
C. to 1000°
C. - View Dependent Claims (17, 18, 19, 20)
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21. A process for the metathesis of olefins carried out by bringing the olefins into contact with a catalyst comprising a mesoporous matrix and at least the elements molybdenum and aluminium, said elements being incorporated into said matrix using at least one precursor comprising molybdenum and aluminium, in which the catalyst is prepared according to the process comprising the following stages:
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a1) solubilization of the precursor comprising molybdenum and aluminium and of the precursors of the mesoporous matrix based on oxide of at least one element X in an aqueous or hydro-organic solution in the presence of a pore-forming agent so as to form a colloidal solution, b1) spray-drying said colloidal solution so as to obtain spherical solid elemental particles incorporating the mesostructured matrix based on oxide and the precursor comprising molybdenum and aluminium, c1) optional stage of drying, calcination and/or steam treatment of the solid particles obtained at the end of stage b1) and d1) stage of thermal activation of the dry solid particles at the end of stage c1), in a temperature range from 100 to 1000°
C. - View Dependent Claims (22, 23, 24, 25)
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Specification