Xylitol sweet and sucrose equivalent, soluble in water can absorb a lot of heat, is all sugar alcohol sweetener in the largest value of heat absorption, so when the solid consumption, will produce a pleasant sense of cool in the mouth. Xylitol does not cause caries and has anti-caries effect. Metabolism is not regulated by insulin, metabolism in the human body is complete, calorific value of 16.72kJ / g, can be used as diabetes, the thermal energy.
Xylitol Sugar alcohol production process is relatively long, but must hold a few key processes to ensure that the quality of xylitol and production of the smooth progress, which is the outline of the proposed, a few key processes to do a good job to put the wood Sugar alcohol production points. Xylitol has the following noteworthy processes, as described below.
Xylitol Hydrolysis process is the first process of xylitol production, is related to the quality of xylitol and the subsequent process of processing the key to the difficulty. If you can not grasp the quality of the hydrolyzate, it will bring a lot of trouble to the sequencing process, and ultimately will affect the quality of the product. The primary concern of the hydrolysis process is the problem of raw material purification. The raw corncobs should be screened, washed and removed, and the impurities are not artificially introduced into the hydrolyzate, resulting in a congenital deficiency of the hydrolyzate. Hydrolysis process parameters of the three elements is the catalyst, hydrolysis temperature and time. Where the catalyst is only a matter of quantity, the amount of catalyst used to catch the line; hydrolysis temperature is a matter of concern, the temperature is low is not complete hydrolysis, and if high will cause serious consequences, the temperature is too high will make hydrolysis Sugar in the liquid to continue to dehydrate the formation of furfural or deep hydrolysis to produce low-level carbohydrates, such as acetic acid, acetone, etc., will also make a lot of protein hydrolysis, the formation of organic pigments and colloids, which will follow the purification process is very difficult. In order to ensure that the hydrolysis temperature appropriate to introduce temperature automatic control system, is already very easy to solve the problem. The same hydrolysis time can not be enough or too long, will cause the same water with the same temperature, the consequences of how long, although there is a basic time, but to be appropriate, it is necessary operators according to different raw materials, different climate, Accumulated practical experience to master.
Neutralization process is the key process of neutralizing the deacidification process, in which the vast majority of the inorganic acid - sulfuric acid will be removed. Neutralization effect of the advantages and disadvantages of pH control, the pH value of the hydrolyzate is generally 1 to 1.5, and to pH4, the inorganic acid and most of the neutralization, and organic acids began to neutralize, when the pH 5, about 70% of acetic acid, formic acid, levulinic acid and other organic acids are neutralized, in order to make all the organic acid was neutralized to pH10. But when the pH value of 4 to 5 will destroy the sugar, the formation of pigment, neutralization of the local alkali will also cause reduced sugar decomposition, neutralization pH is usually 3.5, temperature 70 ~ 80 ℃.
Xylitol Decolorization process is the main process of xylitol production, the pigment in the hydrolyzate is the natural pigment in the raw material and the pigment produced in the production. The natural pigment such as the anthocyanin is present in the glycoside, and can be hydrolyzed into an acid medium Sugar and a non-sugar body, in the alkaline green, protein and amino acid hydrolysis also produce nitrogen-containing colored material, sugar in alkaline decomposition also produce pigments, sugar can also produce caramel when heated. These factors will make the color of the hydrolyzate deepened, affecting the quality of xylitol products, must be decolorized.