Method for preparing isomalt from isomaltulose

Abstract

The invention discloses a method for preparing isomalt from isomaltulose. The method comprises the following steps of: adding a dissolved crystal of the isomaltulose in a high-pressure reaction kettle, and adding a skeleton nickel catalyst for hydrogenation to obtain the isomalt. In the method, by maintaining a pH value which is an important condition in the hydrogenation, the activity of the nickel catalyst is greatly improved; and the reaction is completed under a lower reaction pressure, and after the reaction, the content of the isomalt is as high as more than 99 percent.

Description

technical field [0001] The invention relates to a production method for preparing isomalt with isomaltulose. Background technique [0002] Isomalt, also known as hydrogenated isomaltulose, para-full sugar alcohol, properties: white odorless crystal, sweet taste, sweetness is about 45%-65% of sucrose, slightly hygroscopic, melting point 145 -150°C, specific rotation ≥+91.5° (4% aqueous solution, M / V); soluble in water, its solubility in water is lower than that of sucrose at room temperature, close to sucrose after heating, insoluble in ethanol. According to my country's "Hygienic Standards for the Use of Food Additives" (GB 2760-1996) (it has become a new resource food in 2009): isomalt can be used in ice cream, popsicles, candies, cakes, fruit juice (flavored) drinks, biscuits It can be used in moderation according to production needs in , bread, jam and prepared wine, and can also be applied to baked food. [0003] Isomalt is a functional sugar alcohol emerging internatio...

AI Technical Summary

Problems solved by technology

④ High tolerance, many sweeteners, such as sorbitol, xylitol, hydrogenated glucose syrup, maltitol syrup and many oligosaccharides, if eaten too much, will cause abdominal distension, bowel sounds, diarrhea and other discomfort, so FAO / WHO stipulates its maximum dosage, but the human body's tolerance to isomalt is surprisingly large, daily intake of 50g will not cause gastrointestinal discomfort, so it has been reviewed and approved by the FAO / WHO Joint Expert Committee on Food Additives, The daily intake of isomalt is not required

Chinese Patent No. 00114194.5 discloses a patent: Raney nickel usage is 1-2% (W / W, catalyst / reactant), 0.5 palladium-carbon usage is 0.5-1% (W / W, catalyst / reactant) All adopt Raney nickel catalyst in the above-mentioned patents, along with the carrying out of reaction, the pH value of reaction solution drops gradually, even drops below PH5, and the lower the pH value, the lower the activity of Raney nickel catalyst, even deactivation, reaction The worse the effect, the worse the product quality; the Raney nickel catalyst also accelerates the dissolution in the solution as the pH value decreases so that the consumption of the Raney nickel catalyst increases