Method for preparing non-crystallized granule state starch using spray drying method

Abstract

The invention discloses a method for preparing noncrystal granular starch by using the spray-drying process, which comprises the steps as follows: native starch or chemically modified starch is dispersed in water below gelatinization temperature, and is prepared into even starch slurry with the concentration from 1 percent to 50 percent; the starch slurry is preheated to 75 to 105 DEG C to convert crystals in starch granule into noncrystals; finally, the noncrystallized starch slurry in the starch granule is sprayed and dried, thus getting noncrystal granular starch in loose structure with even granules without agglomerated particles. The production units used in the method are simple; the conditions are operated and controlled easily; no chemical reagents are needed; the method is clean and saves energy; the preparation cycle is short; the method can be industrialized easily. In particular, as the products prepared with the method are in unique grain structure, the method can be widely applied in the industries and fields of food, chemical engineering, pharmacy and so on.

Description

technical field [0001] The invention relates to a method that can be directly used in raw starch and modified starch production enterprises, and the amorphous granular starch produced therefrom can be widely used in food, chemical, pharmaceutical and other industries and fields to prepare amorphous granular starch by spray drying. Methods. Background technique [0002] Starch is a natural polymer compound synthesized by green plants through photosynthesis, which is both granular and crystalline. The existence of a large number of crystals in starch granules directly reduces the biological and chemical reactivity of starch. Therefore, the preparation of amorphous granular starch with high chemical and biological reactivity without crystalline structure, chemical and biological modification of starch and The development of new starch materials is of great significance. [0003] The published patents on the preparation of amorphous granular starch include: Chinese patent 0112...

AI Technical Summary

Problems solved by technology

Amorphous granular starch prepared by high cross-linking chemical method, due to the existence of a large number of cross-linking chemical bonds, changes the chemical structure of starch granules, making starch granules lose their gelatinization, which greatly limits their application fields; ethanol solvent The protection method is a better preparation method. The starch granules do not undergo any chemical reaction, but the physical state transformation occurs. The ethanol is easy to wash off and can be reused, but its production cost is high, and it requires high equipment and production safety conditions; medium Although moisture and heat treatment can realize the amorphization of starch granules, the starch granules are greatly damaged after amorphization, the conditions are difficult to control, and the final product is severely agglomerated; the amorphous granular starch prepared by the salt solution protection method needs to be eluted to remove Salt on the surface of starch granules, but the elution effect is not ideal, and the product contains more impurities