Method of preparation of a hydrogenation catalyst soluble in an organic liquid phase
AssigneeInstitut Francais du Petrole
InventorsDaniel Durand, Gerard Hillion, Patrick Sarrazin
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Abstract
The method of preparation comprises: a step (a) of placing in solution at least one compound of at least one metal A in at least one organic solvent S, and of at least one reducing compound R of at least one metal B in at least one organic solvent S', a step (b) of placing the reducing compound R in contact with the metal A compound, a step (d) of neutralisation of the residual reducing functions of the reducing compound R with at least one oxidizing agent O, and where applicable the addition of a selectivity agent P either during step (a) or during step (c) placed between steps (b) and (d), The catalyst obtained can be used in selective or total hydrogenation.
Claims35
In a method of preparation of a catalyst in a homogeneous phase, soluble in an organic medium, said method comprising:
- (a) reacting a solution of at least one compound of at least one metal A in at least one organic solvent S with at least one compound R of at least one metal B, in at least one organic solvent S', said solvents S and S' solubilizing said compounds and being essentially free of oxidizing agents, said compound R capable of reducing said compound of metal A,
- the improvement comprising subsequent to (a), and prior to use of the catalyst, (b) neutralizing residual reducing capacity of the reducing compound R for the compound of metal A with at least one oxidizing agent O.
A method of preparation of a catalyst in a homogeneous phase, soluble in an organic medium, said method comprising:
- (a) reacting a solution of at least one compound of at least one metal A from group Ib, IIb, Vb, VIIb or VIII in at least one organic solvent S which is essentially free of oxidizing agents and is a saturated or unsaturated hydrocarbon, a monoaromatic compound, a polyaromatic compound, a saturated or unsaturated alkylbenzene, a saturated or unsaturated monocyclic compound, oxide or ether, with at least one compound R of at least one metal B, which is an organometallic derivative of lithium, sodium or aluminum, in at least one organic solvent S' which is essentially free of oxidizing agents and is independently selected from those given for S, said solvents S and S' solubilizing said compounds, said compound R capable of reducing said compound of metal A,
- (b) subsequent to (a), and prior to use of the catalyst, neutralizing all residual reducing capacity of the reducing compound R to the compound of metal A with at least one oxidizing agent O which is a primary or secondary long-chain aliphatic alcohol with at least 6 carbon atoms, a linear or branched tertiary alcohol, a cyclic alcohol, an aromatic alcohol or a polyol.
In a method of preparation of a catalyst in a homogeneous phase, soluble in an organic medium, said method comprising:
- (a) reacting a solution of at least one compound of at least one metal A in at least one organic solvent S with at least one compound R of at least one metal B, in at least one organic solvent S', said solvents S and S' solubilizing said compounds and being essentially free of oxidizing agents, said compound R capable of reducing said compound of metal A,
- the improvement comprising subsequent to (a), and prior to use of the catalyst, (b) neutralizing residual reducing capacity of the reducing compound R to the compound of metal A with at least one oxidizing agent O, which is not a phenol.
Dependencies are inferred from the claim text.