Catalysts for hydrogenation of aromatic compounds
AssigneeBoard of Regents, The University of Texas System
InventorRichard A. Jones
Life of this patent
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Abstract
A novel transition metal catalyst which has a phosphido-type linkage is much less subject to metal loss during operations because of its greater bond strength. This catalyst will hydrogenate unsaturated hydrocarbons under milder conditions than most prior art catalysts.
Claims15
A catalyst which has the formula ##STR10## where R' and R" are independently any organic or inorganic functionality capable of bonding to phosphorus;
- Tm is a d-block transition metal;
- and
- Ly is any functionality capable of bonding to a d-block transition metal.
A catalyst which has the formula ##STR11## where R' is a methylated styrene-divinyl benzene copolymer;
- R" is an alkyl or aryl group;
- Tm is selected from the group consisting of iron, cobalt, nickel, ruthenium, rhodium, palladium, osmium, iridium, and platinum;
- and
- Ly is any functionality capable of bonding to a d-block transition metal.
A process for synthesizing a phosphido type transition metal catalyst, comprising the steps of:
- (a) reacting a halogenated functionality capable of bonding to phosphorus with a monometallated primary phosphine to form a secondary phosphine;
- (b) reacting the secondary phosphine with a metallated organic radical to deprotonate and metallate the secondary phosphine;
- and
- (c) reacting the metallated secondary phosphine with a transition metal compound having the formula XTmLy, where
- X is any inorganic, anionic functional group,
- Tm is a d-block transition metal, and
- Ly is any functional group capable of bonding to a d-block transition metal,
- to form a phosphido type linkage between the phosphorus and transition metal atoms.
Dependencies are inferred from the claim text.