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A kind of bipolar membrane electrodialysis production process of gluconic acid

A technology of bipolar membrane electrodialysis and gluconic acid, which is applied in the field of bipolar membrane electrodialysis production technology of gluconic acid, can solve the problems of low production efficiency, uncontrolled sodium gluconate feed liquid index, high production cost, etc., and achieve reduction Production cost and energy consumption, good electrodialysis, and the effect of improving product quality

Active Publication Date: 2017-02-01
YIBIN GRACE GROUP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Both documents did not pretreat the sodium gluconate before entering the bipolar membrane, and did not control the indicators of the sodium gluconate feed solution, resulting in low production efficiency and high production costs

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] A bipolar membrane electrodialysis production process of gluconic acid, the sodium gluconate raw material first removes the suspended solids of large particles through a pre-filter, and then intercepts large molecular weight pollutants through a microporous filter, and the resulting sodium gluconate The permeate enters the bipolar membrane electrodialysis membrane stack for circulation, and recovers NaOH obtained from the alkali chamber and gluconic acid obtained from the acid chamber; the mass fraction of the sodium gluconate permeate is 10%, the temperature is 15°C, and the hardness ≦30mg / l, suspended solids≦0.5mg / l, conductivity 22ms / cm, residual sugar concentration≦0.8%.

Embodiment 2

[0036] A bipolar membrane electrodialysis production process of gluconic acid, the sodium gluconate raw material first removes the suspended solids of large particles through a pre-filter, and then intercepts large molecular weight pollutants through a microporous filter, and the resulting sodium gluconate The permeate enters the bipolar membrane electrodialysis membrane stack for circulation, and recovers NaOH obtained from the alkali chamber and gluconic acid obtained from the acid chamber; the mass fraction of the sodium gluconate permeate is 40%, the temperature is 50°C, and the hardness is ≦ 30mg / l, suspended matter≦0.5mg / l, conductivity 30ms / cm, residual sugar concentration≦0.8%.

[0037] When the conductivity of the salt chamber solution of the bipolar membrane electrodialysis membrane stack is lower than 300ms / cm, the sodium gluconate permeate solution ends the cycle.

Embodiment 3

[0039] A bipolar membrane electrodialysis production process of gluconic acid, the sodium gluconate raw material first removes the suspended solids of large particles through a pre-filter, and then intercepts large-molecular-weight pollutants through a microporous filter, and the resulting sodium gluconate The permeate enters the bipolar membrane electrodialysis membrane stack for circulation, and recovers NaOH obtained from the alkali chamber and gluconic acid obtained from the acid chamber; the mass fraction of the sodium gluconate permeate is 30%, the temperature is 30°C, and the hardness is ≦ 30mg / l, suspended matter≦0.5mg / l, conductivity 25ms / cm, residual sugar concentration≦0.8%.

[0040] When the conductivity of the salt chamber solution of the bipolar membrane electrodialysis membrane stack is lower than 300ms / cm, the sodium gluconate permeate solution ends the cycle.

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Abstract

The invention provides a producing technology of gluconic acid through a bipolar membrane electrodialysis method. The method includes following steps: enabling a raw material, sodium gluconate, to pass through a pre-filter for removing large-granular suspended solids, enabling the sodium gluconate to pass through a microporous filter to intercept large-molecular contaminants to obtain a sodium gluconate permeated solution, feeding the sodium gluconate permeated solution into a bipolar-membrane electrodialysis membrane stack for circulation, and recycling NaOH obtained in an alkali chamber and the gluconic acid obtained in an acid chamber. The sodium gluconate permeated solution is 10-40% of mass fraction, is 15-50 DEG C in temperature, is not more than 30 mg / L in hardness, is not more than 0.5 mg / L in suspended solid, is 22-30 ms / cm in conductivity and is not more than 0.8% in residual-sugar concen tration. In the invention, the raw material, sodium gluconate, is subjected to pre-treatment so that indexes of the pre-treated sodium gluconate are suitable for the subsequent bipolar membrane electrodialysis technology. The producing technology is high in recycling ratio of the gluconic acid, is low in energy consumption and is stable in operation.

Description

technical field [0001] The invention belongs to the field of gluconic acid production, in particular to a bipolar membrane electrodialysis production process of gluconic acid. Background technique [0002] Gluconic acid derivatives are substances obtained from gluconic acid through a certain chemical reaction. With the gradual deepening of people's life and the concept of nutritional science, newer and higher requirements are put forward for the development and manufacture of food, and the development of nutritional enhancers is increasingly People pay attention to it, and gluconic acid derivatives are one of the promising products. [0003] Glucono-lactone has been widely used as protein (tofu) coagulant, sour agent, noodle product improver, pH regulator, food preservative and preservative in the food industry. Aqueous agents and detergents. There are four methods for producing gluconic acid from glucose: fermentation, oxidase, chemical catalysis, and electrolytic oxidati...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C25B3/00C25B15/08
Inventor 冯涛邓传东易家祥李殿红朱小川夏崇胜
Owner YIBIN GRACE GROUP CO LTD