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Method for producing sodium gluconate from sodium gluconate fermentation liquid

A technology of sodium gluconate and fermented liquid, which is applied in the field of producing sodium gluconate, can solve the problems of mother liquor product quality and recovery rate limitation, low selling price of crystallization mother liquor products, and difficult control of product color, etc., so as to achieve easy control of the process and improve The effect of total production yield and low pigment content

Inactive Publication Date: 2014-07-30
EAST CHINA UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The biological fermentation method has the characteristics of fast fermentation speed, easy control of the fermentation process, and easy extraction of products, but it also has certain defects, such as high viscosity of the crystallization system, high crystallization temperature, limited product yield, and difficult control of product color, etc.
The crystallization mother liquor after one evaporation and crystallization of the fermentation broth also contains a certain amount of sodium gluconate. The crystallization mother liquor of this sodium gluconate contains a certain amount of pigment and glucose, which makes direct evaporation and crystallization difficult, and the selling price of the crystallization mother liquor product is low. , poor utilization
Chinese patent CN102086149A introduces a method for extracting sodium gluconate crystallization mother liquor, which uses crystallization mother liquor to decolorize, concentrate, and adds ethanol solution to carry out crystallization extraction. , the quality and recovery of the mother liquor product are subject to certain restrictions

Method used

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  • Method for producing sodium gluconate from sodium gluconate fermentation liquid

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] The content of sodium gluconate was detected by spectrophotometry; the content of pigment in the solution was detected by spectrophotometry at an absorption wavelength of 670nm; the content of reducing substances in the solution and sodium gluconate crystalline product was determined by the iodine B method.

[0041] Get primary crystallization mother liquor 500g, the content of sodium gluconate is 40wt%, adopt commercially available HZ806 resin to carry out decolorization primary crystallization mother liquor, select HZ806 resin chromatography column diameter to be 1cm, the aspect ratio of HZ806 resin chromatography column is 8: 1. The flow rate of the primary crystallization mother liquor through the HZ806 resin chromatography column is 12BV / h; the operating temperature is room temperature.

[0042] Adopting commercially available HZ806 resin to decolorize the primary crystallization mother liquor comprises the following steps: (a) pretreating the macroporous adsorption...

Embodiment 2

[0055] A method for producing sodium gluconate by sodium gluconate fermented liquid, its technical process is as follows figure 1 shown, including the following steps:

[0056] (1) sodium gluconate fermentation liquid is filtered to obtain sodium gluconate fermentation filtrate, sodium gluconate fermentation filtrate is evaporated and crystallized and filtered to obtain sodium gluconate crystal product and primary crystallization mother liquor;

[0057] (2) using macroporous adsorption resin to decolorize the primary crystallization mother liquor to obtain intermediate crystallization mother liquor;

[0058] (3) adopt ion exchange resin to carry out sugar removal to intermediate crystallization mother liquor, obtain purified crystallization mother liquor;

[0059] (4) Merging the purified crystallization mother liquor into step (1) sodium gluconate fermentation filtrate for evaporation and crystallization and filtering to obtain a sodium gluconate crystal product.

[0060] T...

Embodiment 3

[0085] A method for producing sodium gluconate by sodium gluconate fermented liquid, its technical process is as follows figure 1 shown, including the following steps:

[0086] (1) sodium gluconate fermentation liquid is filtered to obtain sodium gluconate fermentation filtrate, sodium gluconate fermentation filtrate is evaporated and crystallized and filtered to obtain sodium gluconate crystal product and primary crystallization mother liquor;

[0087] (2) using macroporous adsorption resin to decolorize the primary crystallization mother liquor to obtain intermediate crystallization mother liquor;

[0088] (3) adopt ion exchange resin to carry out sugar removal to intermediate crystallization mother liquor, obtain purified crystallization mother liquor;

[0089] (4) Merging the purified crystallization mother liquor into step (1) sodium gluconate fermentation filtrate for evaporation and crystallization and filtering to obtain a sodium gluconate crystal product.

[0090] T...

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Abstract

The invention relates to a method for producing sodium gluconate from sodium gluconate fermentation liquid. The method comprises the following steps of: filtering sodium gluconate fermentation liquid to obtain sodium gluconate fermentation clear liquid, and carrying out evaporation crystallizing and filtering on the clear sodium gluconate fermentation clear liquid to obtain a sodium gluconate crystal product and primary crystallizing mother liquor; decolorizing the primary crystallizing mother liquor by adopting macroporous adsorbent resin to obtain a middle crystallizing mother liquor; removing sugar from the middle crystallizing mother liquor by adopting ion exchange resin to obtain a purified crystallizing mother liquor; and combining the purified crystallizing mother liquor to the sodium gluconate fermentation clear liquid to be subjected to evaporation crystallizing and filtering so as to obtain the sodium gluconate crystal product. Compared with the prior art, the method has the advantages that the total production yield is improved; the obtained sodium gluconate crystal product is good in color and high in purity; at the same time, the resins for decolorizing and removing sugar can be regenerated for utilization, thereby being environment-friendly and energy-saving; and the new process method for producing sodium gluconate is easy and simple to operate, easy in process control, high in product purity and low in pollution.

Description

technical field [0001] The invention relates to a preparation method of sodium gluconate, in particular to a method for producing sodium gluconate from a sodium gluconate fermentation liquid. Background technique [0002] Sodium gluconate is a common and widely used sodium salt of organic acids. Industrial grade sodium gluconate is often used in construction, chemical and other industries. In the construction industry, it is often used as a cement additive to reduce water and retard the setting. In the chemical industry, it is used to produce other gluconate, gluconic acid and gluconic acid. The basic raw material of lactone also has good applications in electroplating, cleaning agent, film manufacturing, water quality treatment, etc.; food-grade sodium gluconate is often used in food and pharmaceutical industries. In the food industry, it is used as a food additive to regulate Taste, adjust acidity, dehydration, solidification, etc. In the pharmaceutical industry, it can a...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C07C59/105C07C51/43C07C51/47
Inventor 陈葵褚明伟吴艳阳纪利俊武斌朱家文
Owner EAST CHINA UNIV OF SCI & TECH