A kind of preparation method of psicose crystal

A technology of allulose and allulose sugar, which is applied in the field of preparation of allulose crystals, can solve the problems of non-concentrated crystal mesh distribution, cumbersome production process, and low product yield, so as to save energy consumption , Simplified preparation process, good material mass transfer performance

Active Publication Date: 2021-12-07
SHANDONG BAILONG CHUANGYUAN BIO TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In the prior art, allulose often has problems such as difficult crystallization, low product yield, fine crystal form, and non-concentrated crystal mesh distribution due to high saturation concentration of allulose solution (greater than 80%) and high viscosity; There are also some preparation methods that need to add a large amount of organic solvents in the production process, resulting in troublesome production and potential safety hazards, complicated production technology, low yield and high cost

Method used

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  • A kind of preparation method of psicose crystal
  • A kind of preparation method of psicose crystal
  • A kind of preparation method of psicose crystal

Examples

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Comparison scheme
Effect test

Embodiment 1

[0048] A method for preparing psicose crystals, comprising the following steps:

[0049] (1) Evaporation and crystallization: take allulose sugar liquid, the solid content of the allulose sugar liquid is 73%, and the purity is ≥ 95%, add allulose seed crystals, allulose seed crystals The dosage of the allulose syrup is 1‰ of the quality of the allulose syrup, the size of the allulose seed crystal is 250 mesh, evaporated and crystallized under the conditions of 41°C and a vacuum of -0.01MPa, until the solid state of the allulose syrup is The substance content is 81%;

[0050] (2) Crystallization: Add water to the allulose syrup system obtained in step (1), and at the same time continue to evaporate and crystallize at 41°C and a vacuum of -0.01MPa, so that the allulose syrup The solid content is always between 82% and 83%, and the crystallization time is 4h;

[0051] After the whole crystal is finished, the micrograph (100 times) of gained crystal is as follows figure 1 As sh...

Embodiment 2

[0059] A method for preparing psicose crystals, comprising the following steps:

[0060] (1) Evaporation and crystallization: take allulose sugar solution, the solid content of the allulose sugar solution is 74%, and the purity is ≥ 95%, add allulose seed crystals, allulose seed crystals The addition amount of the allulose syrup is 1.2‰ of the quality of the allulose syrup, the size of the allulose seed crystal is 260 mesh, evaporated and crystallized under the conditions of 45°C and a vacuum of -0.01MPa, until the solid state of the allulose syrup is The substance content is 82%;

[0061] (2) Crystallization: Add water to the allulose syrup system obtained in step (1), and at the same time continue to evaporate and crystallize at 45°C and a vacuum of -0.01MPa, so that the allulose syrup The solid content is always between 82% and 83%, and the crystallization time is 6h;

[0062] After the whole crystal is finished, the micrograph (100 times) of gained crystal is as follows ...

Embodiment 3

[0070] A method for preparing psicose crystals, comprising the following steps:

[0071] (1) Evaporation and crystallization: take allulose sugar solution, the solid content of the allulose sugar solution is 75%, and the purity is ≥ 95%, add allulose seed crystals, allulose seed crystals The dosage of the allulose syrup is 1.5‰ of the quality of the allulose syrup, the size of the allulose seed crystal is 280 mesh, evaporated and crystallized under the conditions of 50°C and a vacuum of -0.01MPa, until the solid state of the allulose syrup is The substance content is 83%;

[0072] (2) Crystallization: Add water to the allulose syrup system obtained in step (1), and at the same time continue to evaporate and crystallize under the conditions of 50°C and a vacuum of -0.01MPa, so that the allulose syrup The solid content is always between 82% and 83%, and the crystallization time is 8 hours;

[0073] After the whole crystal is finished, the micrograph (100 times) of gained cryst...

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Abstract

The invention relates to a method for preparing psicose crystals. The present invention adopts the combination of evaporation crystallization method and cooling crystallization method to prepare allulose crystals, the preparation process is simple, easy to operate, and the crystallization period is short. In the present invention, during the evaporation crystallization process, the seed crystals are added at a lower solid content (70-75%), which is beneficial to the crystallization process, and the crystal growth rate in all directions is more uniform, which can shorten the entire crystallization period and save energy. Consumption; crystallization is carried out after evaporation and crystallization. The crystallization makes the crystal size tend to be averaged, and at the same time the crystal surface grows to be smooth, and the crystal shape is improved; after the crystallization, cooling crystallization is carried out. Zone curve, design the cooling frequency of different cooling intervals. According to the preparation method of the present invention, after the crystallization is completed, the yield of the obtained crystals is high, the crystal size distribution is concentrated, and the crystal surface is smooth and mirror-like, with good light reflection and regular crystal forms.

Description

technical field [0001] The invention relates to a method for preparing psicose crystals, which belongs to the technical field of preparation of functional sugars. Background technique [0002] Allulose (D-psicose) is a six-carbon sugar with a very low content in nature, and it is an epimer at the C-3 position of D-fructose. D-Psicose is difficult to digest and absorb, and hardly provides energy for life activities, so it is a very useful low-calorie sweetener. In the field of medicine and health, D-psicose can inhibit fatty liver enzymes and intestinal α-glucosidase, thereby reducing the accumulation of body fat and inhibiting the rise of blood sugar concentration. Adding D-psicose to meals can reduce postprandial blood glucose response and improve insulin sensitivity and glucose tolerance. In addition, compared with other rare sugars, D-psicose can more effectively scavenge active oxygen free radicals. In mouse experiments, it was found that D-psicose can prevent bis-(2-...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C07H1/06C07H3/02
CPCC07H3/02C07H1/06C07B2200/13
Inventor 杜倩张兴晶刘双双干昭波邵先豹李方华
Owner SHANDONG BAILONG CHUANGYUAN BIO TECH
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