Method for crystallizing erythritol fermentation liquid by evaporation-elution coupled process

A technology of erythritol, dissolution and crystallization, applied in the field of evaporation coupling dissolution and crystallization of erythritol fermentation liquid, can solve the problem of large amount of dissolution agent, and achieve the advantages of concentration, product particle size distribution, Effect of reducing operating energy consumption

Inactive Publication Date: 2015-07-15
WUHAN UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, this method requires a large amount of solvent

Method used

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Examples

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Effect test

Embodiment 1

[0018] A method for evaporation coupled elution and crystallization of erythritol fermentation liquid, the specific steps of which are: adding a certain amount of erythritol fermentation liquid and a dissolution agent to the evaporation kettle, under normal pressure (or reduced pressure) conditions Evaporate, and at the same time continuously add solvent to it, when the mass ratio of solvent to water in the liquid phase in the evaporator is (0.5-2):1, add seed crystals, continue to evaporate while feeding Dissolving agent, solid-liquid separation after the crystallization is completed, the filter cake is washed and dried to obtain erythritol crystals.

[0019] The erythritol fermentation liquid described in this embodiment refers to the fermentation liquid that has been purified by cell separation, ion exchange, membrane filtration and decolorization.

[0020] The dissolving agent described in the present embodiment is acetone.

[0021] The addition of seed crystals described...

Embodiment 2

[0024] A kind of evaporation coupling dissolution crystallization method of erythritol fermented liquid, its concrete steps are:

[0025] In this embodiment, except that the eluting agent is methanol, all the others are the same as in embodiment 1.

Embodiment 3

[0027] A kind of evaporation coupling dissolution crystallization method of erythritol fermented liquid, its concrete steps are:

[0028] In this embodiment, except that the eluent is ethanol, all the other are the same as in embodiment 1.

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Abstract

The invention relates to a method for crystallizing an erythritol fermentation liquid by an evaporation-elution coupled process. The technical scheme is as follows: the method comprises the following steps: adding certain amounts of erythritol fermentation liquid and elution agent into an evaporation kettle, and evaporating while continuously feeding the elution agent; when the mass ratio of the elution agent to water in the liquid phase in the evaporation kettle is (0.5-2):1, adding a crystal seed, and continuing evaporating while continuously feeding the elution agent; and after the crystallization is finished, carrying out solid-liquid separation, washing the filter cake, and drying to obtain the erythritol crystal. The method obviously lowers the energy consumption of crystallization operation in erythritol industry, shortens the production cycle, enhances the crystallization yield and color grade, avoids the defects of ever-increasing suspension density of the crystallization mother solution in the evaporation crystallization or cooling crystallization process, and can effectively lower the phenomena of crushing and accumulation of the crystallization product.

Description

technical field [0001] The invention belongs to the technical field of polysaccharide alcohol production, and in particular relates to an evaporation-coupling dissolution crystallization method of erythritol fermentation liquid. Background technique [0002] Erythritol is a natural sugar and functional sweetener. It is widely used in the development of low-calorie health food, functional food or beverage for people with diabetes and glucose discomfort, and children's special tooth cleaning products. The market prospect is very promising. The production scale of domestic erythritol has ranked among the top in the world, and the production capacity has exceeded 10,000 t / a. However, there is still a certain gap in product quality compared with foreign products, especially in terms of crystal form and particle size distribution. [0003] The industrial production of erythritol mainly adopts the fermentation method. After the fermentation liquid is purified, it is first evaporate...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C07C31/24C07C29/78
CPCC07C29/78C07C31/24
Inventor 张春桃刘帮禹王鑫王海蓉
Owner WUHAN UNIV OF SCI & TECH
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