A process for the reaction of an organic compound in the presence of a catalyst comprising, as active metal, ruthenium alone or together with at least one Group Ib, VIIb, or VIIIb metal in an amount of from 0.01 to 30 wt %, based on the total weight of the catalyst, applied to a support, wherein from 10 to 50% of the pore volume of the support comprises macropores having a pore diameter in the range of from 50 nm to 10,000 nm and from 50 to 90% of the pore volume of the support comprises mesopores having a pore diameter in the range of from 2 to 50 nm, the sum of said pore volumes being 100%, and said catalyst as such.

Process for reacting an organic compound in the presence of a supported ruthenium catalyst

The invention relates to the hydrogenation of aromatic compounds, in particular the preparation of alicyclic polycarboxylic acids or esters of these, via ring hydrogenation of the corresponding aromatic polycarboxylic acids or esters of these, and also to catalysts suitable for this purpose.

Catalyst and method for hydrogenating aromatic compounds

A new catalyst (I) contains 0.01-30 wt% ruthenium or palladium as active metal, optionally together with Group I, VII or VIII transition metal(s), on a carrier (II) in which (novel feature) 10-50% of the pore volume consists of macropores with a pore diameter (PD) of 50-10,000 nm and 50-90% consists of mesopores with a PD of 2-50 nm. Also claimed are (i) a process for conversion of polymers containing multiple C-C bond(s) in presence of (I) and (ii) a process for conversion of organic compounds in the presence of (I) in which the active metal is ruthenium.

Process for the conversion of an organic compound in the presence of a supported ruthenium-catalyst

The invention relates to a method for hydrogenating at least one organic compound by bringing said organic compound into contact with a gas containing hydrogen in the presence of a catalyst. Said catalyst comprises ruthenium as an active metal, either alone or combined with another metal of the subgroups I, VII or VIII of the periodic table, deposited on an amorphous silicon dioxide-based support. Said catalyst is obtained by i): treating the amorphous silicon dioxide-based support with a halogen-free aqueous solution of a low-molecular ruthenium compound, and subsequently drying the treated support at a temperature of less than 200 °C, ii) reducing the solid matter obtained in i) with hydrogen at a temperature ranging from 100 to 350 °C, wherein step ii) is carried out directly after step i).

Method for hydrogenating organic compounds by means of ru/sio2 catalysts

The present invention provides a process for production of propylene glycol with high yield and selectivity in an aqueous reaction mixture of lactic acid and hydrogen with an essentially pure elemental ruthenium catalyst on an inert support at elevated pressure and temperature. In particular, the present invention provides a process wherein the catalyst is a ruthenium salt deposited on a microporous support, reduced to ruthenium on the support with hydrogen, and oxidized in the presence of oxygen to provide a ruthenium oxide surface on the surface of the ruthenium metal and wherein the catalyst is maintained in the surface oxidized state until it is reduced with hydrogen prior to the reaction process.

Condensed phase catalytic hydrogenation of lactic acid to propylene glycol

An improved method for selectively hydrogenating an alkylphenol to produce the corresponding cis-alkylcyclohexanol by employing a solid catalyst is disclosed. The catalyst useful in this method is a ruthenium catalyst supported on an alumina carrier. This catalyst exhibits excellent reactivity, selectivity and durability in the catalytic hydrogenation compared to conventional rhodium or ruthenium catalysts, such as ruthenium oxide and ruthenium catalysts supported on carbon. The alkylcyclohexanol product contains so much cis-isomer that it is suitable as such for use as an intermediate for the synthesis of varous chemicals, such as perfumes.

Method for the preparation of cis-alkylcyclohexanols

Verfahren zur herstellung von cis-alkylcyclohexanolen

PURPOSE:To prepare the title compound useful as a raw material of perfumes, in high purity and yield and at low cost, by the hydrogenation of an alkylphenol in the presence of ruthenium-alumina catalyst. CONSTITUTION:A cis-alkylcyclohexanol of formula II (R is 1-4C alkyl) is prepared by the hydrogenation of an alkylphenol of formula I at =10 kg/cm G for <=4 hours, in the presence of <=15 wt.%, based on the raw material, of a ruthenium-alumina catalyst pref. containing <=20 wt.% of ruthenium. The catalyst can be prepared by a conventional process such as impregnation of alumina with an aqueous solution of ruthenium chloride followed by the reduction with formalin or in steam flow.

Mituyoshi Oshima

Papers

Method for the preparation of cis-alkylcyclohexanols

Verfahren zur herstellung von cis-alkylcyclohexanolen

Preparation of cissalkylcyclohexanol