Process and system for extracting erythritol

A technology of erythritol and extraction process, which is applied in the field of extraction process and system of erythritol, and can solve the problems of unstable late stage process, low concentration of material liquid, large water consumption and the like

Pending Publication Date: 2021-09-14
SEPATEC ENVIRONMENTAL PROTECTION TECH XIAMEN
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The main disadvantages of this process: 1. The concentration of the feed liquid changes greatly, and the later process is unstable
2. The concentration of the feed liquid is low, and the energy consumption of subsequent evaporation is high
3. Large water consumption

Method used

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  • Process and system for extracting erythritol
  • Process and system for extracting erythritol
  • Process and system for extracting erythritol

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0044] Such as figure 1 Shown, the invention discloses a kind of extraction process of erythritol, it comprises the following steps:

[0045] S1. Ceramic membrane filtration: the erythritol fermentation broth is eluted and filtered through a primary ceramic membrane to obtain a primary dialysate and a primary concentrated solution. The pore size of the primary ceramic membrane is 50-200nm.

[0046] S2. Nanofiltration filtration: the primary dialysate in step S1 is eluted and filtered through a nanofiltration membrane to obtain a nanofiltration dialysate and a nanofiltration concentrated solution. The molecular weight cut-off of the nanofiltration membrane is 200-1000 Daltons.

[0047] S3. Nanofiltration graded treatment: real-time detection of erythritol concentration on the nanofiltration dialysate in step S2, and graded treatment:

[0048] If the nanofiltration dialysate concentration is less than 13%, return to the aforementioned process for processing.

[0049] If the co...

Embodiment 2

[0052] Such as figure 2 Shown, the invention discloses a kind of extraction process of erythritol, it comprises the following steps:

[0053] S1, ceramic membrane filtration: pass the fermentation broth of erythritol (concentration 15%-20%, light transmittance>2%, electrical conductivity2%, conductivity 2%, electrical conductivity<2000μs / cm, PH3-5). The secondary concentrate is used as waste liquid for later treatment.

[0054] S2. Concentration: Concentrate the secondary dialysate in step S1 through a nanofiltration membrane with a molecular weight cut-off of less than 100 Daltons to obtain a concentrated solution (refraction ≥ 15%, light transmittance > 2%, conductivity 90%, conductivity < 200μs / cm). The permeate can be recycled for elution in the secondary ceramic membrane in step S1 and the nanofiltration membrane in step S3.

[0055] S3, nanofiltration filtration: the primary dialysate in step S1 and the concentrated solution in step S2 are eluted and filtered through...

Embodiment 3

[0062] Such as image 3 As shown, the present invention also discloses an extraction system of erythritol, which includes: a first-level ceramic membrane filtration device 10 connected to each other through pipelines, a secondary ceramic membrane filtration device 20, a membrane concentration device 30, and a nanofiltration membrane Purification device 40 , resin separation and purification device 50 and concentration and crystallization system 60 . The first-level concentration pipeline 109 of the first-level ceramic membrane filtration device 10 is connected with the second-level ceramic membrane filtration device 20, and the second-level dialysis pipeline 208 of the second-level ceramic membrane filtration device 20 is connected with the membrane concentration device 30; The primary dialysis pipeline 108 of concentrated pipeline 308 and primary ceramic membrane filtration device 10 is connected with nanofiltration membrane purification device 40 respectively; Classificatio...

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Abstract

The present invention relates to the field of food, and discloses a process for extracting erythritol. The process comprises the steps of S1, ceramic membrane filtration, S2, nanofiltration filtration, S3, nanofiltration liquid grading treatment, and S4, concentration crystallization. The invention also discloses a system for extracting erythritol, which comprises a primary ceramic membrane filtration device, a nanofiltration membrane purification device, a resin separation and purification device and a concentration and crystallization system which are connected with one another through pipelines. A grading device capable of grading the nanofiltration dialysate to different outlets according to the concentration value of the nanofiltration dialysate is arranged on a nanofiltration dialysate outlet of the nanofiltration membrane purification device, and a plurality of grading outlets are formed in the grading device. According to the invention, the nanofiltration dialysate is subjected to grading treatment according to the solubility by adopting the grading device, and enters different treatment procedures according to different concentrations, so that the concentration change of the system is small, the later process is stabilized, the utilization rate of feed liquid is greatly improved, the energy consumption of subsequent evaporative crystallization is reduced, and meanwhile, the water consumption in the elution process is also reduced.

Description

technical field [0001] The invention relates to the field of food, in particular to an extraction process and system for erythritol. Background technique [0002] Erythritol is a newly developed 4-carbon sugar alcohol, which can be obtained by fermentation of glucose. It is a white crystalline powder with a refreshing sweet taste, not easy to absorb moisture, stable at high temperature, stable in a wide range of pH, and has a certain taste when dissolved in the mouth. Mild cooling feeling, suitable for a variety of food additives. At present, there are three main production methods of erythritol, namely biological extraction method, chemical synthesis method and microbial fermentation method. In comparison, the microbial fermentation method has become the most ideal erythritol production method because of its mild production conditions, stable quality of the target product, and high food safety. [0003] The existing erythritol process uses a set of ceramic membranes to co...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C31/24C07C29/76
CPCC07C29/76C07C31/24
Inventor 吴培福陈明清於锦锋刘斌许云鹏
Owner SEPATEC ENVIRONMENTAL PROTECTION TECH XIAMEN
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