Producing starch hydrolyzate with specified dextrose content for use in the production of crystallized dextrose comprising a saccharification and two nanofiltration stages

摘要

A method of producing a starch hydrolyzate rich in dextrose from a milk of liquefied starch comprising a saccharification stage and two nanofiltration stages. In the first stage a milk of liquefied starch is saccharified using a glucogenic enzyme to obtain a syrup containing 75-90 wt.% and preferably 80-90 wt.% of dextrose. In the second stage the syrup is separated by nanofiltration to obtain a retentate and a permeate with a dextrose content above 95 wt.%, preferably above 96 wt.% and most preferably above 97 wt.%. In the third stage the permeate is separated by nanofiltration to give the hydrolyzate. An Independent claim is included for a method of producing sorbitol by hydrogenation of the hydrolyzate produced by the claimed method.