Starch liquefaction and saccharification technology in fructose production

Abstract

The invention discloses a starch liquefaction and saccharification process based on the production of fructose. The starch is prepared with water to make starch milk with a dry matter content of 30%-35%, the pH is adjusted to 6.0-6.5 with hydrochloric acid, and ɑ- is added to each ton of starch raw material. The amount of amylase is 6-10μ/g starch, adding CaCl2 to adjust the Ca" concentration to 0.01mol/l, the slurry is pumped into the jet liquefier, the temperature is raised to 105-110°C instantaneously, the pipeline liquefaction reaction takes 10-15min, and the feed liquid is transported to the liquefaction tank, at 95-97°C, add ɑ-amylase twice, continue the liquefaction reaction for 40-60 minutes, and the iodine color reaction is qualified; the starch liquefaction solution is introduced into the saccharification tank, cooled to 60°C, adjusted to pH 4.5, and added 80μ/g starch glucoamylase, with intermittent stirring, keep warm at 60°C for 40-50h, saccharify to DE>95, heat to 90°C, destroy the glucoamylase and stop the saccharification reaction. This process can make the starch liquefy and saccharify quickly, The fructose produced has high quality and good taste and meets people's needs.

Description

technical field [0001] The present invention relates to a process, in particular to a process based on starch liquefaction and saccharification in fructose production. Background technique [0002] Containing 6 carbon atoms in fructose, it is also a monosaccharide, which is an isomer of glucose. It exists in a large amount in fruit juice and honey in a free state. Fructose can also combine with glucose to form sucrose. Pure fructose is a colorless crystal with a melting point of 103-105°C. It is not easy to crystallize and is usually a viscous liquid that is easily soluble in water, ethanol and ether. D-fructose is the sweetest monosaccharide. Fructose is the most common ketohexose. It exists in honey and fruit, and combines with glucose to form sucrose for daily consumption. Containing 6 carbon atoms in fructose, it is also a monosaccharide, which is an isomer of glucose. It exists in a large amount in fruit juice and honey in a free state. Fructose can also combine with...

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to overcome the problem that the above-mentioned existing fructose cannot be accurately liquefied and saccharified, which affects the mouthfeel of fructose and is unfavorable for fructose production. A starch liquefaction and saccharification process based on fructose production is designed, which can Fast liquefaction and saccharification of starch, resulting in high-quality fructose and good taste, meeting people's needs