Method for producing 1-octanol
AssigneeAbengoa Bioenergia Nuevas Tecnologias, S.A.
InventorsAvelino Corma Canos, Marcelo Eduardo Domine, Juan Luis Sanz Yague, Francisco Antonio Ladron de Guevara Vidal
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Abstract
The present invention relates to a process for obtaining 1-octanol which comprises a contact step between ethanol, n-hexanol and a catalyst, wherein said catalyst comprises: i) a metal oxide that comprises the following metals: M1 is at least one bivalent metal selected from Mg, Zn, Cu, Co, Mn, Fe, Ni and Ca; M2 is at least one trivalent metal selected from Al, La, Fe, Cr, Mn, Co, Ni, and Ga; ii) a noble metal selected from Pd, Pt, Ru, Rh and Re; and iii) optionally, comprises V; with the proviso that the catalyst comprises at least V, Ga or any of their combinations.
Claims24
Process for obtaining 1-octanol which comprises a contact step between ethanol, n-hexanol and a catalyst, wherein said catalyst comprises:
- i) a metal oxide that comprises the following metals:
- M1 is at least one bivalent metal selected from Mg, Zn, Cu, Co, Mn, Fe, Ni and Ca;
- M2 is at least one trivalent metal selected from Al, La, Fe, Cl−, Mn, Co, Ni, and Ga;
- ii) a noble metal selected from Pd, Pt, Ru, Rh and Re;
- and
- iii) optionally, comprises V;
- with the proviso that the catalyst comprises at least V, Ga or any of its combinations.
The process according the preceding claim, wherein the hydrotalcite is obtained by the co-precipitation of M1 and M2 compounds.
The process according to any of the preceding claims, wherein M1 is Mg.
The process according to any of the preceding claims, wherein M2 comprises Al, Ga or any of its combinations, preferably M2 comprises Al or Al and Ga.
The process according to any of the preceding claims, wherein the catalyst comprises V.
The process according to any of the preceding claims, wherein the V and/or the noble metal is added to the metal oxide by wet impregnation, incipient volume impregnation or deposition-precipitation.
The process according to the preceding claim, wherein, following the addition of the noble metal, there is a calcination step and a reduction step subsequent to said calcination.
The process according to any of the preceding claims, wherein the contact between the ethanol, n-hexanol and the catalyst is performed at a pressure of up to 120 bar, preferably between 20 and 80 bar.
The process according to any of the preceding claims, wherein the contact between the ethanol, n-hexanol and the catalyst is performed under atmosphere of nitrogen, argon, hydrogen or any mixture thereof, preferably in a nitrogen and hydrogen atmosphere.
Process for obtaining a catalyst, which comprises the following steps:
- a) total or partial thermal decomposition of a hydrotalcite with the formula [M1(1-x) M2x(OH)2][Am-(x/m).nH2O], to obtain a metal oxide, wherein:
- M1 is at least one bivalent metal selected from Mg, Zn, Cu, Co, Mn, Fe, Ni and Ca;
- M2 is at least one trivalent metal selected from Al, La, Fe, Cr, Mn, Co, Ni and Ga;
- and
- A is at least one anion selected from hydroxide, chloride, fluoride, bromide, iodide, nitrate, perchlorate, chlorate, bicarbonate, acetate, benzoate, methanesulfonate, p-toluenesulfonate, phenoxide, alkoxide, carbonate, sulfate, terephthalate, phosphate, hexacyanoferrate (Ill) and hexacyanoferrate (II),
- x is a value greater than 0 and less than 1;
- m is an integer between 1 and 4;
- and n is greater than 0,
- b) addition of V and of at least one noble metal selected from Pd, Pt, Ru, Rh and Re to the solid obtained in the previous step.
The process according to the previous claim, characterised in that it further comprises a step (a′) prior to step (a), where the hydrotalcite is synthesised by the co-precipitation of M1 and M2 compounds.
The process according to the preceding claim, which further comprises a reduction step (d), subsequent to (c).
Use of the catalyst according to the preceding claim, to obtain 1-octanol.
Dependencies are inferred from the claim text.