公开(公告)号：US3725386A

公开(公告)日：1973-04-03

申请号：US3725386D

申请日：1971-12-06

Applicant: STALEY MFG CO A E

Inventor： HANSON C ,  TUSCHHOFF J

IPC: C08B31/12 ,  C08B19/06

CPC classification number: C08B31/12

Abstract: A method of purifying crude, cold water swelling hydroxypropylated starch derivatives prepared by reacting propylene oxide directly with granular starch in the presence of a polybasic, water soluble salt of phosphoric acid catalyst, and in the absence of any liquid reaction medium by washing the crude reacted product with a water-alcohol mixture, the water being present in the water-alcohol mixture in a weight ratio of between 0.1 to 0.7 parts per part of alcohol. The method removes the overreacted-highly substituted starch fractions which are not approved for food use, and other by-products which would otherwise limit the use of the crude product in food.

Abstract translation: 在磷酸催化剂的多碱性水溶性盐存在下，通过环氧丙烷直接与颗粒淀粉反应制备粗制，冷水溶胀羟丙基化淀粉衍生物的方法，并且在没有任何液体反应介质的情况下通过洗涤粗制反应 产品与水 - 醇混合物，水以每摩尔醇重量比为0.1至0.7份的重量比存在于水 - 醇混合物中。 该方法除去未被批准用于食品的过度反应高度取代的淀粉部分，否则将限制食品中粗产物的使用的其它副产物。