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Method for extracting fructose from sodium gluconate crystallization mother liquor

A technology of sodium gluconate and crystallization mother liquor is applied in the field of sodium gluconate production to achieve the effects of improving extraction rate, clean process and easy implementation

Inactive Publication Date: 2018-05-29
赵琪
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The technical problem solved by the present invention is: extract the fructose resource in the sodium gluconate crystallization mother liquor, improve the extraction rate of the sodium gluconate product; do not produce the waste mother liquor, put an end to the pollution of the environment by solid waste; shorten the production process flow, save energy and reduce consumption; refine fructose , used in feed additives to increase product added value

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  • Method for extracting fructose from sodium gluconate crystallization mother liquor

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] (1) Crude fructose extraction. Take 1000ml of the primary crystallization mother liquor of sodium gluconate, add 1000ml of industrial methanol at room temperature, and mix and stir thoroughly to obtain a suspension; separate the suspension from solid and liquid to obtain 280g of filter cake and 1800ml of centrifugal mother liquor; dry the filter cake to obtain glucose sodium bicarbonate 230g; the centrifuged mother liquor was distilled, and after industrial methanol was recovered, 800ml of distilled raffinate was obtained.

[0023] (2) Refined fructose. At room temperature, add 1000ml of DMAC to 800ml of distillation raffinate, mix and stir to obtain a suspension; separate the suspension from solid and liquid to obtain 70g of filter cake and 1800ml of centrifuged mother liquor; dry the filter cake to obtain 50g of sodium gluconate; Centrifuge the mother liquor for rectification, recover DMAC and water, and obtain 150 g of fructose, which is used as a feed additive.

Embodiment 2

[0025] (1) Crude fructose. Get sodium gluconate secondary crystallization mother liquor 1000ml, add industrial methanol 2000ml under normal temperature, through fully mixing, stirring, obtain suspension; Suspension is done solid-liquid separation, obtains 250g filter cake and 2800ml centrifuge mother liquor; Filter cake is dried, obtains Sodium gluconate 200g; Distill the centrifuged mother liquor, recover industrial methanol, and obtain 800ml of distillation raffinate.

[0026] (2) Refined fructose. At room temperature, add 1500ml of DMAC to 800ml of distillation raffinate, mix and stir to obtain a suspension; separate the suspension from solid and liquid to obtain 80g of filter cake and 2300ml of centrifuged mother liquor; dry the filter cake to obtain 60g of sodium gluconate; After centrifuging the mother liquor and rectifying, recovering DMAC and water, 180 g of fructose is obtained, which is used as a feed additive.

Embodiment 3

[0028] (1) Crude fructose. Take 1000ml of sodium gluconate tertiary crystallization mother liquor, add 2000ml of industrial methanol at room temperature, and mix and stir thoroughly to obtain a suspension; separate the suspension from solid and liquid to obtain 330g filter cake and 2800ml centrifugal mother liquor; dry the filter cake to obtain glucose 300g of sodium bicarbonate; the centrifuged mother liquor was distilled, and after industrial methanol was recovered, 800ml of distilled raffinate was obtained.

[0029] (2) Refined fructose. At room temperature, add DMAC2000ml to 800ml distillation raffinate, mix thoroughly,

[0030] Stir to obtain a suspension; separate the suspension from solid-liquid to obtain 65g of filter cake and 2800ml of centrifugal mother liquor; dry the filter cake to obtain 50g of sodium gluconate; rectify the centrifugal mother liquor, recover DMAC and water, and obtain 250g of fructose, For feed additives.

[0031] In summary, the present invent...

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Abstract

The invention relates to the field of sodium gluconate production, in particular to a method for extracting fructose from sodium gluconate crystallization mother liquor. The technical scheme is that the method comprises the following steps: firstly, coarse extraction of fructose: a solvating agent is added to the mother liquor at room temperature, suspension is obtained and subjected to solid-liquid separation, then a filter cake and centrifugal mother liquor are obtained, the filter cake is dried, and an industrial sodium gluconate product is obtained; the centrifugal mother liquor is distilled, the solvating agent and a distillation reside are obtained, and the solvating agent is recycled; secondly, refining of fructose: an organic solvent is added to the distillation reside at room temperature, suspension is obtained and subjected to solid-liquid separation, then a filter cake and centrifugal mother liquor are obtained, the filter cake is dried, and an industrial sodium gluconate product is obtained; the centrifugal mother liquor is distilled, the organic solvent, water and fructose are obtained; the organic solvent is recycled, the water is applied to production, and fructose is applied to feed additives.

Description

technical field [0001] The invention relates to the field of sodium gluconate production, in particular to a method for extracting fructose from sodium gluconate crystallization mother liquor. Background technique [0002] At present, the main method of producing sodium gluconate in my country is the biological fermentation method, which uses corn starch as raw material to obtain glucose solution through double-enzyme sugar production, and then uses glucose as carbon source to ferment Aspergillus niger under liquid conditions. The enzyme oxidizes glucose into gluconic acid. During the fermentation process, liquid sodium hydroxide is added to adjust the pH value of the fermentation broth to generate sodium gluconate fermentation broth; during the process of adding sodium hydroxide, the fermentation broth will be partially over-alkaline, allowing some glucose to pass through Enol conversion produces fructose. Since the Aspergillus niger strain used for sodium gluconate cannot ut...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C13K11/00C07C51/42C07C59/105
CPCC07C51/42C13K11/00C07C59/105
Inventor 赵琪
Owner 赵琪