| 摘要 |
1,177,701. Non-crystallizing starch syrups. CORN PRODUCTS CO. 2 March, 1967 [3 March, 1966], No. 10041/67. Heading C2C. A sweet non-crystallizing starch conversion syrup containing 5 to 30% ketose, 35 to 45% dextrose and 15 to 35% maltose all percentages being by weight on a dry substance basis and preparation of a sweet non-crystallizing starch conversion syrup having a D.E. above 55 and containing at least 5% ketose, not more than 45% dextrose and between 15 and 35% maltose by weight on a dry substance basis by subjecting a starch conversion syrup having at least 50% dextrose content to interconversion of dextrose to ketose to provide a dextrose content not in excess of 45% and a ketose content of at least 5%. The interconversion may be carried out in any conventional manner and particularly by passing the starch conversion syrup to be treated over a strongly basic anion exchange resin and then holding the effluent at an elevated temperature until the desired extent of interconversion of dextrose to ketose has occurred. The initial starch conversion syrup having a dextrose content of at least 50% and a substantial maltose content is preferably obtained by subjecting a liquefied starch having a D.E. up to 20 to conversion with a malt enzyme and subjecting the resulting liquor, e.g. having a D.E. in the range 35-45, to further conversion with a microbial enzyme, e.g. a fungal enzyme, to give the desired syrup, e.g. having a D.E. of 65 to 75, and a dextrose content of at least 50%. |
