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OwnerArnd Bottcher, Dominic Vanoppen +1inventors
InventorsArnd Bottcher, Dominic Vanoppen, Jan-Dirk Arndt
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Cycloaliphatic compounds I which have side chains containing epoxide groups are prepared by heterogeneously catalyzed hydrogenation of a compound II which comprises at least one carbocyclic aromatic group and at least one side chain containing at least one epoxide group over a ruthenium catalyst, wherein the ruthenium catalyst is obtainable by i) treating a support material based on amorphous silicon dioxide one or more times with a halogen-free aqueous solution of a low molecular weight ruthenium compound and subsequently drying the treated support material at below 200° C., ii) reducing the solid obtained in i) by means of hydrogen at from 100 to 350° C., where step ii) is carried out directly after step i).
A process for preparing cycloaliphatic compounds I which have side chains containing epoxide groups by heterogeneously catalyzed hydrogenation of a compound II which comprises at least one carbocyclic aromatic group and at least one side chain containing at least one epoxide group over a ruthenium catalyst,
A process as claimed in either of the preceding claims, wherein the ruthenium catalyst contains from 0.2 to 10% by weight of ruthenium, based on the weight of the support.
A process as claimed in any of the preceding claims, wherein the compound II is used as a solution in an organic solvent which is inert under the hydrogenation conditions, where the solution contains from 0.1 to 10% by weight of water, based on the solvent.
A process as claimed in any of the preceding claims, wherein the compound II is selected from among aromatic glycidyl ethers and their oligomers which still contain glycidyl groups.
A process as claimed in any of the preceding claims, wherein the hydrogenation is carried out at a hydrogen partial pressure in the range from 10 to 300 bar.
A process as claimed in any of the preceding claims, wherein the hydrogenation is carried out at from 30 to 150° C.
A process as claimed in any of the preceding claims, wherein the hydrogenation is carried out over a fixed catalyst bed.
A process as claimed in any of the preceding claims, wherein the hydrogenation is carried out in a liquid phase in which the catalyst is present in the form of a suspension.
Dependencies are inferred from the claim text.