Separation of mannitol from galactitol
AssigneeGeorgia-Pacific Corporation
InventorJohn A. Neal
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Abstract
A process for the separation of mannitol from galactitol is disclosed which comprises selectively crystallizing mannitol from an alkanol-water solution of the mixture to which a small amount of a soluble salt of an iron, nickel, or cobalt has been added.
Claims16
A process for the recovery of mannitol from a mixture containing predominately mannitol and galactitol which comprises crystallizing the mannitol from a solution of the mixture in an alkanol-water or a dioxane-water solution containing at least 1 volume percent of the alkanol or dioxane, said solution of the mixture containing ferric, nickelous, or cobaltous ions in an amount sufficient to complex with the galactitol, said alkanol having from 1 to 4 carbon atoms.
A process for the recovery of mannitol from a mixture of mannitol and galactitol containing predominantly mannitol which comprises dissolving the mixture in water at an elevated temperature, intermixing an alkanol having from 1 to 4 carbon atoms or dioxane with the aqueous solution in an amount of at least 1 volume percent, adding a metal compound to obtain ferric, nickelous, or cobaltous ions in the solution in an amount sufficient to complex with the galactitol, and crystallizing the mannitol from the resulting solution.
Dependencies are inferred from the claim text.