Preparation of high fructose syrups from citrus residues

A process for recovering a plurality of useful products from a citrus press liquor line from which a citrus press cake and screenable solids have been removed, which process comprises:

• (A) ultrafiltering the screen filtered press liquor to form (i) a permeate fraction consisting essentially of limonene-containing biocidally active materials and an aqueous solution of the dissolved sugars and soluble polymeric carbohydrates from said press liquor, and (ii) a retentate fraction consisting essentially of solid citrus fragments and shards from said press liquor;
• (B) recovering the biocidally active materials from the permeate fraction to form an aqueous phase which is substantially free of said biocidally active materials and consists essentially of the dissolved sugars and soluble polymeric carbohydrates from said press liquor;
• (C) extracting fructose, glucose, and sucrose by suspending the retentate fraction from step (A) in a volume of water at 65-85 degrees C. roughly corresponding to the original volume of said press liquor for about 10 to 15 minutes;
• (D) separating the residual water-insoluble material remaining after the aqueous extraction of step (C) and combining it with a press cake from which citrus press liquor has been separated to increase the solids content thereof by at least 10 percent on a dry weight basis;
• and
• (E) combining the separated aqueous extract from step (C) with the aqueous phase from step (B) to increase the hexose content of said aqueous phase by at least 20 percent by volume.