Method for recovering erythritol from erythritol crystallization mother liquor

A technology of erythritol and crystallization mother liquor, applied in the field of erythritol extraction, can solve the problems of high cleaning agent cost, increase production cost, reduce membrane flux and the like, achieve good impurity removal effect, simplify production process, and achieve high purity high effect

Active Publication Date: 2013-03-13
SEPATEC ENVIRONMENTAL PROTECTION TECH XIAMEN
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in actual use, we have found that because the erythritol crystallization mother liquor Brix and COD are particularly high, using the above method to filter with an organic ultrafiltration membrane will easily pollute the ultrafiltration membrane, reduce the membrane flux, and after cleaning, The flux is difficult to recover, an

Method used

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  • Method for recovering erythritol from erythritol crystallization mother liquor
  • Method for recovering erythritol from erythritol crystallization mother liquor
  • Method for recovering erythritol from erythritol crystallization mother liquor

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] Step 1 pretreatment: Dilute the erythritol crystallization mother liquor with pure water to obtain a 30% dilution of Brix;

[0019] Step 2 ceramic membrane filtration: filter the above diluted solution with a ceramic membrane with a separation pore size of 20nm, the working temperature is 25-40°C, and the pressure is 0.1-0.5Mpa to obtain a ceramic filter membrane dialysate, the dialysate Brix is ​​25%. Luminosity is 12%;

[0020] Step 3 nanofiltration filtration: the ceramic membrane dialysate obtained in step 2 is subjected to nanofiltration filtration with a nanofiltration membrane with a molecular weight cut-off of 150-350 Daltons, and the working temperature of the nanofiltration filtration is 25-35° C., and the pressure is 1.5 ~2.5Mpa, get the nanofiltration dialysate, the Brix of the nanofiltration dialysate is 11%, the transmittance is 98%, and the content of erythritol is 80%;

[0021] Step 4 Concentration and crystallization: the above-mentioned nanofiltration...

Embodiment 2

[0024] Step 1 pretreatment: Dilute the erythritol crystallization mother liquor with pure water to obtain a 50% dilution of Brix;

[0025] Step 2 ceramic membrane filtration: filter the above diluted solution with a ceramic membrane with a separation pore size of 50nm, the working temperature is 25-40°C, and the pressure is 0.1-0.5Mpa to obtain a ceramic filter membrane dialysate. The dialysate Brix is ​​27%. Luminosity is 10%;

[0026] Step 3 nanofiltration filtration: the ceramic membrane dialysate obtained in step 2 adopts a molecular weight cut-off of 150-350 Daltons, and a nanofiltration membrane with a MgSO4 cut-off rate greater than 99%, performs nanofiltration filtration, and the nanofiltration filtration work The temperature is 25-35°C, the pressure is 1.5-2.5Mpa, and the nanofiltration dialysate is obtained. The Brix of the nanofiltration dialysate is 11%, the transmittance is 99.5%, and the content of erythritol is 85%;

[0027] Step 4 Concentration and crystalliza...

Embodiment 3

[0030] Step 1 pretreatment: Dilute the erythritol crystallization mother liquor with pure water to obtain a 40% dilution of Brix;

[0031] Step 2 ceramic membrane filtration: filter the above diluted solution with a ceramic membrane with a separation pore size of 100nm at a working temperature of 25-40°C and a pressure of 0.1-0.5Mpa to obtain a ceramic filter membrane dialysate, the dialysate Brix is ​​23%, and the dialysate Luminosity is 9%;

[0032] Step 3 nanofiltration filtration: the ceramic membrane dialysate obtained in step 2 is subjected to nanofiltration filtration with a nanofiltration membrane with a molecular weight cut-off of 150-350 Daltons, and the working temperature of the nanofiltration filtration is 25-35° C., and the pressure is 1.5 ~2.5Mpa, get the nanofiltration dialysate, the Brix of the nanofiltration dialysate is 11%, the transmittance is 94%, and the content of erythritol is 79%;

[0033] Step 4 Concentration and crystallization: the above-mentioned...

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Abstract

The invention discloses a method for recovering erythritol from erythritol crystallization mother liquor. The method is characterized by comprising the following steps: 1, pre-treating: diluting the erythritol crystallization mother liquor by pure water, so as to obtain the diluted solution containing 30 to 50% of Brix; 2, filtering by a ceramic membrane: filtering the diluted solution by the ceramic membrane which has the separation aperture of 20 to 100 nanometers, so as to obtain the ceramic membrane filtering dialyzate; 3, nano-filtering: treating the ceramic membrane filtering dialyzate obtained in step 2 by non-filtering through a Dalton nanofiltration membrane with molecular weight cutoff of 150 to 350, so as to obtain the nano-filtering dialyzate; and 4, concentrating and crystallizing: concentrating the nano-filtering dialyzate in vacuum, and then crystallizing to obtain erythritol crystal containing more than 99.5% of erythritol. By adopting the technical scheme, the method has the beneficial effects that the Dalton nanofiltration membrane with molecular weight cutoff of 150 to 350 is adopted, and the processes such as purifying and decolorizing can be realized by one step, so that the production technology is simplified, the production cost is reduced, and the advantage of being high in product yield is brought.

Description

technical field [0001] The invention relates to the field of erythritol extraction, in particular to a method for recovering erythritol from erythritol crystallization mother liquor. Background technique [0002] Erythritol is a low-calorie tetraol with a sweetness of 60-80% of sucrose. Its chemical name is 1,2,3,4-butanetetraol, and its calories are only one-tenth of that of sucrose. Sugar alcohol has the advantages of low energy value, high tolerance, no toxic side effects, edible for diabetics and non-cariogenic properties. In recent years, it has been widely used in functional foods such as low sugar and health care. Also versatile. At present, the industrial production of erythritol is mainly realized through microbial fermentation. [0003] The erythritol crystallization mother liquor refers to the brown-black mother liquor produced after repeated crystallization and extraction of fermented yeast liquid in the production process of erythritol, and its mass content of...

Claims

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Application Information

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IPC IPC(8): C07C31/24C07C29/76C07C29/78
Inventor 王伟陈小强杨晓红陈明清於锦峰刘斌吴培福
Owner SEPATEC ENVIRONMENTAL PROTECTION TECH XIAMEN
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