The Dow Chemical Company

Seth I Norman

Richard T Stringfield

H Robert Goltz

Robert L LaBrie

Upen J Bharwada

Christopher C Gopsill

Kathleen F O'Brien

Bitter components, such as limonin, may be effectively removed from citrus juices, particularly navel orange juices, by contacting the juices with an adsorbent resin. The adsorbent resin is derived from a copolymer of a monoethylenically unsaturated monomer and a crosslinking monomer, where the copolymer has been post-crosslinked in the swollen state in the presence of a Friedel-Crafts catalyst and functionalized with hydrophilic groups. Preferably, the copolymers are styrene and divinylbenzene.

Removal of bitterness from citrus juices using a post-crosslinked

A process for decolorizing an aqueous sugar solution by contacting the solution with an absorbent resin, wherein the adsorbent resin is a macroporous copolymer being post-crosslinked in a swollen state in the presence of a Friedel-Crafts catalyst and functionalized with hydrophilic groups prior to contact with the aqueous sugar solution.

Process for decolorizing aqueous sugar solutions via adsorbent resins,

Acids can be removed from fruit juices by treating the juice with a filter apparatus comprising a pre-coat cake containing a functionally effective amount of weak base resin particulates. The sizes of the particulates are such that substantially all of said particulates range from about -50 to about -100 mesh. The weak base resin is most desirably one wherein the amount of strong base functionalities are less than about 5 percent, based on the total number of strong and weak base functionalities. Juices treated using the pre-coat cake taste sweet and the essential character thereof is not altered.

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Midland, MI, United States of America

Seth I Norman