Method for the production of sorbit
AssigneeBASF SE
InventorsDominic Vanoppen, Melanie Maas-Brunner, Ulrich Kammel, Jan-Dirk Arndt
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Abstract
A process is described for preparing sorbitol by catalytic hydrogenation of a monosaccharide forming sorbitol on hydrogenation in the liquid phase, which comprises the catalyst being obtainable by: i) single or multiple treatment of an amorphous silicon dioxide based support material with a halogen-free aqueous solution of a low-molecular-weight ruthenium compound and subsequent drying of the treated support material at below 200° C., ii) reducing the solid obtained in i) with hydrogen at from 100 to 350° C., step ii) being carried out immediately after step i).
Claims10
A process for preparing sorbitol by catalytic hydrogenation of an aqueous solution of a monosaccharide that forms sorbitol on hydrogenation in the presence of a ruthenium catalyst, which comprises the ruthenium catalyst being obtainable by:
- i) single or multiple treatment of an amorphous silicon dioxide based support material with a halogen-free aqueous solution of a low-molecular-weight ruthenium compound and subsequent drying of the treated support material at below 200° C.,
- ii) reducing the solid obtained in i) with hydrogen at from 100 to 350° C.,
- step ii) being carried out immediately after step i).
A process as claimed in one of the preceding claims, wherein the ruthenium catalyst contains ruthenium in an amount from 0.2 to 10% by weight, based on the weight of the support.
A process as claimed in one of the preceding claims, wherein the monosaccharide is used as aqueous solution having a pH in the range from 4 to 10.
A process as claimed in one of the preceding claims, wherein the monosaccharide is glucose.
A process as claimed in one of the preceding claims, wherein the hydrogenation is carried out at a hydrogen partial pressure in the range from 10 to 500 bar.
A process as claimed in one of the preceding claims, wherein the hydrogenation is carried out at from 40 to 250° C.
A process as claimed in one of the preceding claims, wherein the hydrogenation is carried out on a fixed-bed catalyst.
A process as claimed in one of the preceding claims, wherein hydrogenation is carried out in liquid phase containing the catalyst in the form of a suspension.
Dependencies are inferred from the claim text.