Patent ID: 7932378

Claim:
A process for manufacturing transglycosylation products, comprising the steps of: reacting a starch ester or starch ether at acidic conditions with an alkanol containing 1 to 6 hydroxyl groups in the presence of an acidic catalyst consisting essentially of at least one of phosphoric acid, H 3 PO 4 , hypophosphorous acid, H 3 PO 2 , and phosphorous acid, H 3 PO 3 in a transglycosylation reaction wherein the catalyst is allowed to chemically bond with the transglycosylation product to form a reaction mixture, and recovering a transglycosylation product, or subjecting the transglycosylation product to further processing, characterized in that the reaction is performed in a reactive extrusion process essentially without any medium, and the reaction mixture is conducted through an extrusion device via at least two separately adjustable heating zones, thereby providing control of heat introduced externally into the reaction mixture.