Crosslinked cyclodextrins supported on porous refractory inorganic oxides
AssigneeUop LLC
InventorsHaya Zemel, Mark B. Koch, Ronald P. Rohrbach
Life of this patent
Estimating the term…
Abstract
Composites on a porous support of an insolubilized, crosslinked cyclodextrin show improved mass transfer characteristics relative to discrete particles of the same insolubilized cyclodextrin. Dicarboxylic acid dihalides are particularly effective crosslinking agents. The composites can be prepared quite simply and cost effectively by impregnating a support, such as alumina, with a cyclodextrin, then reacting the cyclodextrin within the impregnated support with a suitable dicarboxylic acid dihalide, such as one from the alkane dicarboxylic acid series containing from 4 through 12 carbon atoms.
Claims15
A composite of a supported insolubilized cyclodextrin comprising a particulate porous refractory inorganic oxide having dispersed thereon a crosslinked cyclodextrin which is the reaction product of a cyclodextrin with from 1 to about 20 molar proportions of a dicarboxylic acid dihalide, where the crosslinked cyclodextrin is from about 1 to about 25 weight percent of the finished product.
A method of preparing a porous supported insolubilized cyclodextrin comprising impregnating a support with a cyclodextrin, reacting the impregnated cyclodextrin with from 1 to about 20 molar proportions of a dicarboxylic acid dihalide to form impregnated insolubilized crosslinked cyclodextrin, and recovering the resulting supported insolubilized cyclodextrin.
Dependencies are inferred from the claim text.