A kind of continuous preparation method of novel resistant dextrin dietary fiber

Abstract

The invention discloses a continuous preparation method of novel resistant dextrin dietary fiber, comprising the following steps: dissolving glucose and isomaltooligosaccharide in water, adding sorbitol and citric acid, stirring evenly, heating and dissolving to obtain a solution; The prepared solution is injected from the upper part of the scraper evaporator into a scraper evaporator with a preheating temperature of 160-190°C and a vacuum degree of -0.084MPa or above for reaction, and the solution is condensed to obtain a condensate in a molten state ;Put the condensate in water for activated carbon decolorization to obtain a reaction solution; perform ion exchange on the reaction solution, and finally separate the membrane to separate and concentrate the ion-exchange solution to obtain a concentrated solution, which is spray-dried or evaporated to obtain a resistant dextrin with a content greater than or equal to 84%. Dietary fiber. The invention integrates evaporation, condensation reaction, dissolution, and feeding into one, and is carried out simultaneously without mutual interference, so as to achieve the purpose of continuous production, and the method has low energy consumption, simple operation, high yield and low cost.

Description

Technical field [0001] The present invention relates to the field of starch deep processing technology, specifically to a new type of resistant dextrin dietary fiber continuous preparation method. Background [0002] Resistant dextrin, an important product of starch deep processing, is a low-calorie dextran, which belongs to the low molecular weight soluble dietary fiber, dietary fiber is known as the seventh major nutrient necessary for human health, and is an important raw material for the modern food industry. Resistant dextrins are one of the "low viscosity water-soluble dietary fibers", low viscosity, low calorie, low sweetness, high solubility and good processing stability. Because it contains indigestible components that are resistant to the role of human digestive enzymes (amylase, glucose amylase, etc.), it will not be digested and absorbed in the digestive tract, and can directly enter the large intestine, promote the growth of beneficial bifidobacteria and lactic acid ...

AI Technical Summary

Problems solved by technology

The obtained finished product of resistant dextrin contains more impurities. During the reaction process, small molecular monosaccharides, oligosaccharides and other short-chain impurities cannot be removed, and they still remain in the finished product, resulting in low purity of resistant dextrin

For example, using a tank reactor for production, the process is feed-evaporation-condensation reaction-adding water to dissolve-discharging, these four processes are carried out one by one, the second process can only be carried out after the first process is completed, although it is very It is compact, but step by step, one process at a time, is very time-consuming, and in the reaction process, due to the negative pressure evaporation and condensation reaction, it causes a lot of foam, which increases the volume of the reaction liquid, so that the amount of feed is adjusted from the volume. Therefore, the above two points lead to long reaction time, low processing capacity and low efficiency