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Preparation method of psicose crystals

A technique of psicose and psicose sugar, which is applied to the preparation field of psicose crystallization, can solve the problems of unconcentrated crystal mesh distribution, cumbersome production process, low product yield and the like, and saves energy consumption. , The effect of simplifying the preparation process and high crystal yield

Active Publication Date: 2021-03-30
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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  • Preparation method of psicose crystals
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  • Preparation method of psicose crystals

Examples

Experimental program
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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 preparation method of psicose crystals. According to the method, the psicose crystal is prepared by combining an evaporative crystallization method and a cooling crystallization method, the preparation process is simple, the operation is easy, and the crystallization period is short. According to the method, the seed crystal is added when the solid content is low (70-75%) in the evaporative crystallization process, so that the crystallization process is facilitated, the growth speed of the crystal in each direction is more uniform, the whole crystallization period can be shortened, and the energy consumption is reduced; after the evaporative crystallization is finished, crystal rectification is carried out, so that the crystal size tends to be equalized, the crystal surface grows to be smooth, and the crystal form is perfected; cooling crystallization is carried out after crystal rectification, and the cooling frequency of different cooling intervals is designed in the cooling process according to the metastable region curve of psicose. After crystallization according to the preparation method disclosed by the invention is finished, the obtained crystal is high in yield, centralized in crystal size distribution, smooth in crystal surface, mirror-like, good in reflectivity and regular in crystal form.

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 Applications(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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