Solvent-out crystallization method of erythritol

A technology for erythritol and elution crystallization, which is applied in the field of elution and crystallization of erythritol, and can solve the problems of increasing the production process complexity and production cost of erythritol, poor fluidity of erythritol crystals, and crystallization of erythritol. Surface roughness and other problems, to achieve the effect of being conducive to product particle size distribution, reduction of fragmentation and aggregation, and low production costs

Inactive Publication Date: 2013-03-27
WUHAN UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the ground erythritol crystal product has poor fluidity, rough crystal surface, and is easy to agglomerate
And

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] A kind of dissolution crystallization method of erythritol, its method is:

[0033] Step 1, using the erythritol fermented liquid that has been purified through thalline separation, ion exchange, membrane filtration and decolorization as raw material, evaporated and concentrated to a mass concentration of erythritol in the solution of 45 to 50wt%, and the resulting clarified solution is It is the mother liquor of erythritol crystallization. Under the condition of rotating speed of 200-350r / min, add 0.05-0.10M dissolving agent to the erythritol crystallization mother liquor, and the feeding time of dissolving agent is 10-15min to obtain a clear supersaturated crystallization liquid. Evaporation and concentration is carried out under normal pressure conditions.

[0034] Step 2. Under the condition of a rotating speed of 150-250r / min, add a particle size of 170-200 mesh seed crystals to the supersaturated crystallization liquid obtained in step 1. The amount of the seed c...

Embodiment 2

[0039] A kind of dissolution crystallization method of erythritol, its method is:

[0040] Step 1, using the erythritol fermentation liquid that has been purified through thalline separation, ion exchange, membrane filtration and decolorization as raw material, evaporated and concentrated until the mass concentration of erythritol in the solution is 50 ~ 55wt%, and the resulting clarified solution is It is the mother liquor of erythritol crystallization. Under the condition of rotating speed of 200-350r / min, 0.08-0.12M dissolving agent is fed into the erythritol crystallization mother liquor, and the dissolving agent feeding time is 15-18min to obtain a clear supersaturated crystallization liquid. Evaporation and concentration is carried out under normal pressure conditions.

[0041] Step 2. Under the condition of a rotating speed of 150-250r / min, add a particle size of 170-200 mesh seed crystals to the supersaturated crystallization liquid obtained in step 1. The amount of t...

Embodiment 3

[0046] A kind of dissolution crystallization method of erythritol, its method is:

[0047] Step 1, using the erythritol fermented liquid that has been purified through thalline separation, ion exchange, membrane filtration and decolorization as raw material, evaporated and concentrated until the mass concentration of erythritol in the solution is 55 ~ 60wt%, and the resulting clarified solution is It is the mother liquor of erythritol crystallization. Under the condition of rotating speed of 200-350r / min, 0.10-0.15M dissolving agent is fed into the erythritol crystallization mother liquor, and the feeding time of dissolving agent is 17-20min to obtain a clear supersaturated crystallization liquid. Evaporation and concentration is carried out under normal pressure conditions.

[0048] Step 2. Under the condition of a rotating speed of 150-250r / min, add a particle size of 170-200 mesh seed crystals to the supersaturated crystallization liquid obtained in step 1. The amount of t...

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PUM

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Abstract

The invention relates to a solvent-out crystallization method of erythritol. The technical solution is as follows: firstly, a clear supersaturated crystallization solution is prepared by feeding a solvent-out agent in an erythritol crystallization mother solurion; then, a suspension crystal fluid is prepared by adding seed crystals to the supersaturated crystallization solution for controlling nucleation; a suspension slurry is prepared by adding the solvent-out agent at different speed continuously in three stages; and finally, an erythritol crystal product is obtained by growing the crystal with the suspension slurry via a programmed temperature control method, filtering, washing and drying. Crystals with the diameter of 30-60 meshes or 40-80 meshes in the erythritol crystal product accounts for more than 90%; the erythritol crystal product has smooth and clean crystal surface, high purity and good flowability; and single-process crystallization yield is higher than 80%. Average particle size and particle size distribution of the erythritol crystal product can be regulated in the crystallization process by changing the particle size of the seed crystals and the addition amount. The solvent-out crystallization method has the advantages of low production cost, short production period, controllable average particle size, concentrated particle size distribution, high single-process crystallization yield and high product quality.

Description

technical field [0001] The invention belongs to the technical field of industrial crystallization, and in particular relates to a method for dissolution and crystallization of erythritol. Background technique [0002] Erythritol is a new type of polyol functional sweetener, its chemical name is 1,2,3,4-butanetetraol, which is widely found in fruits, seaweed, mushrooms and fermented foods, and is a natural sugar quality. Erythritol is easily absorbed in the small intestine and can only be excreted from the body through the urine through the kidneys. The unique metabolic characteristics determine the characteristics of the low calorie value of erythritol. Its calories are only 5-10% of sucrose, and it is a polysaccharide The lowest energy among alcohol sweeteners, known as "zero calories". The metabolic pathway of erythritol has nothing to do with insulin or is rarely dependent on insulin, and does not participate in glucose metabolism and blood sugar changes, so it is suita...

Claims

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Application Information

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IPC IPC(8): C07C31/24C07C29/78
Inventor 张春桃刘帮禹姜伟奇王海蓉
Owner WUHAN UNIV OF SCI & TECH
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