System and method for preparing erythritol and polydextrose from corn starch

A technology of polydextrose and erythritol, which is applied in the field of sugar alcohol preparation, can solve the problems of increasing the added value of raffinate, low utilization rate of high value, etc., and achieves the effect of reducing processing cost and realizing high value utilization.

Pending Publication Date: 2022-03-01
ZHEJIANG HUAKANG PHARMA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] At present, the purification methods of glucose solution mainly include nanofiltration or simulated moving bed technology. No matter which method is used, the treated glucose solution will be divided into two parts: high-purity glucose extract and low-purity glucose raffinate. It can be used as raw material for erythritol fermentation, but there are 10-20% disaccharides, trisaccharides and other oligosaccharides in the raffinate, which can only be sold as syrup, resulting in high-value utilization of low-purity glucose solution It is relatively low and cannot maximize the added value of the raffinate. For example, the patent with the publication number CN102977156A adopts simulated moving bed technology to process the glucose mother liquor, and the low-purity glucose raffinate is used to make maltose syrup

Method used

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  • System and method for preparing erythritol and polydextrose from corn starch
  • System and method for preparing erythritol and polydextrose from corn starch
  • System and method for preparing erythritol and polydextrose from corn starch

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Embodiment 1

[0043] The first embodiment of the method utilizing cornstarch to prepare erythritol and polydextrose of the present invention, comprises the steps:

[0044] Step 11: After mixing cornstarch A with water to make cornstarch milk, add high temperature resistant α-amylase and glucoamylase in sequence to liquefy and saccharify the cornstarch to obtain a saccharification solution. The filter 4 is used to remove impurities such as macromolecular protein and fat in the saccharification liquid, and then the ion exchange resin of the first ion exchange system 5 is passed through to obtain the glucose liquid B with a conductivity of 1.696 μs / cm and a purity of 96%.

[0045] Step 12: Take glucose solution B with a dry weight of 1 ton and perform nanofiltration treatment to obtain permeate C with a dry weight of 0.79 tons and a glucose purity of 99.2% and a dry weight of 0.21 tons with a glucose purity of 84.0% respectively. % of retentate D. In the retentate D, in addition to glucose, i...

Embodiment 2

[0052] The second embodiment of the method utilizing cornstarch to prepare erythritol and polydextrose of the present invention comprises the following steps:

[0053] Step 21: After mixing cornstarch A with water to make cornstarch milk, add high-temperature resistant α-amylase and glucoamylase in sequence to liquefy and saccharify the cornstarch to obtain a saccharification solution. The filter 4 is used to remove impurities such as macromolecular protein and fat in the saccharification liquid, and then the ion exchange resin of the first ion exchange system 5 is passed through to obtain the glucose liquid B with a conductivity of 1.914 μs / cm and a purity of 95.8%.

[0054] Step 22: Take glucose liquid B with a dry weight of 1 ton and perform nanofiltration to obtain permeate C with a dry weight of 0.78 tons and a glucose purity of 99.4% and a dry weight of 0.22 tons with a glucose purity of 83.1% respectively. The retentate D. In the retentate D, in addition to glucose, it...

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Abstract

The invention relates to a system and a method for preparing erythritol and polydextrose from corn starch. The system comprises a size mixing tank, a liquefying tank, a saccharifying tank, a filter, a first ion exchange system, a nanofiltration unit, a high-temperature polycondensation unit and a fermentation and crystallization unit. Corn starch is used as a raw material, glucose liquid is obtained after liquefaction and saccharification treatment, permeate containing high-concentration glucose and trapped fluid containing low-concentration glucose are obtained after treatment of a nanofiltration unit, the high-purity glucose liquid is used for preparing erythritol through fermentation, and the low-purity glucose liquid is used for preparing polydextrose. According to the method, two high-value products, namely erythritol and polydextrose, can be prepared at the same time, meanwhile, the problem of mother liquor discharge does not exist, the mother liquor treatment cost is reduced, and high-value utilization of low-purity glucose liquid is achieved to the maximum extent.

Description

technical field [0001] The invention belongs to the technical field of sugar alcohol preparation, in particular to a system and method for preparing erythritol and polydextrose from cornstarch. Background technique [0002] Erythritol, the molecular formula is C 4 h 10 o 4 , as an ideal low-calorie sweetener that has emerged in recent years, has the characteristics of low calorie value, good taste, no dental caries, and is safe for diabetic patients. It is widely used in food, beverage and other industries. Erythritol can be synthesized by chemical method, but industrially it is mainly made from glucose as raw material and fermented by bacterial strains. The industrial production of glucose is mainly based on cornstarch as raw material, which is liquefied and saccharified by enzymatic method to obtain glucose crude liquid, and the glucose crude liquid is decolorized, ion exchanged and other processes to obtain refined glucose liquid. When using glucose liquid as raw mate...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C12M1/40C12M1/12C12M1/00C12P19/20C12P19/14C12P19/12C12P19/02C12P19/00C12P7/18C13K1/06C13K1/08C08B37/02
CPCC12M21/18C12M47/10C12P19/20C12P19/14C12P19/12C12P19/02C12P19/00C12P7/18C13K1/06C13K1/08C08B37/0009
Inventor 吴强杨武龙徐伟冬李勉陈德水程新平廖承军
Owner ZHEJIANG HUAKANG PHARMA
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