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Method of preparing sodium gluconate from xylose crystallization mother liquor

A technology of sodium gluconate and crystallization mother liquor, which is used in the preparation of carboxylate, the separation/purification of carboxylic acid compounds, organic chemistry, etc., can solve the problem of difficult separation and purification, high requirements for sterilization process, and low product purity. problem, to achieve the effect of simple and practical equipment, low production cost and good separation effect

Inactive Publication Date: 2009-11-25
CHONGQING UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The main disadvantages of this method are: high cost, complicated intermediate steps, many by-products, high requirements for aseptic technology, difficult separation and purification, low comprehensive utilization rate, low product purity, and high environmental pressure

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] A kind of method preparing sodium gluconate from xylose crystallization mother liquor, concrete steps are as follows:

[0030] (1) Dilution, nanofiltration

[0031]The industrial waste liquor of xylose crystallization mother liquor is used as a raw material, and according to the volume ratio of xylose crystallization mother liquor:purified water of 1:1, pure water is added to the xylose crystallization mother liquor, stirred and diluted. Then the xylose crystallization mother liquid dilution is pumped into the nanofilter, and the nanofiltration membrane with a molecular weight cut-off of 1000 Da is used for nanofiltration treatment, and the filtrate and the retained liquid are collected respectively. The filtrate is a sugar solution containing xylose, glucose, galactose, arabinose, etc.; the retentate is a solution containing large molecular weight solutes such as pigments, which is pumped into a constant temperature water bath and concentrated to a slurry at 80°C. Car...

Embodiment 2

[0045] A kind of method preparing sodium gluconate from xylose crystallization mother liquor, concrete steps are as follows:

[0046] (1) Dilution, nanofiltration

[0047] Same as Example 1, wherein: the volume ratio of xylose crystallization mother liquor: pure water is 1:2.5, the molecular weight cut-off of the nanofiltration membrane is 3000Da; the temperature of the constant temperature water bath of the concentrated retentate is 90°C.

[0048] (2) Enzyme oxidation

[0049] ① Preparation of immobilized glucose oxidase resin column

[0050] With embodiment 1, wherein: cross-linked chitosan-lysine resin carrier amino: glucose oxidase: the mol ratio of glutaraldehyde is 1: 1.35 * 10 -4 : 0.55, adjusted its pH value to 4.0 with disodium hydrogen phosphate-citric acid buffer solution, and carried out adsorption cross-linking for 3 hours.

[0051] ② Enzyme oxidation

[0052] Same as Example 1, wherein: the temperature for enzyme oxidation is 40° C., and the pumping speed of ...

Embodiment 3

[0061] A kind of method preparing sodium gluconate from xylose crystallization mother liquor, concrete steps are as follows:

[0062] (1) Dilution, nanofiltration

[0063] Same as Example 1, wherein: the volume ratio of xylose crystallization mother liquor: pure water is 1:5, the molecular weight cut-off of the nanofiltration membrane is 6000 Da; the constant temperature water bath temperature of the concentrated retentate is 100°C.

[0064] (2) Enzyme oxidation

[0065] ① Preparation of immobilized glucose oxidase resin column

[0066] With embodiment 1, wherein: cross-linked chitosan-lysine resin carrier amino: glucose oxidase: the mol ratio of glutaraldehyde is 1: 2.0 * 10 -4 : 0.6, adjust its pH value to 5.0 with disodium hydrogen phosphate-citric acid buffer solution, and carry out adsorption cross-linking for 4 hours.

[0067] ② Enzyme oxidation

[0068] Same as Example 1, wherein: the temperature for enzyme oxidation is 45° C., and the pumping speed of the filtrate ...

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Abstract

The invention discloses a method of preparing sodium gluconate from xylose crystallization mother liquor, relates to prepartion method of sodium gluconate. The invention uses indurtrial sewage of xylose crystallization mother liquor, through steps of dilution and nanofiltration, enzyme oxidation, anion exchange, washing concentrating and drying to obtain completed products. The invention uses indurtrial sewage of xylose crystallization mother liquor to produce product sodium gluconate with a purity of 96 to 98% and byproduct such as caramel color, waste is made as treaure, and waste source are made of full use, production cost is reduced; simple method, simple device, no waste residue is discharged in production process, clean production and target of energy saving and discharge reducing are implemented, and then production cost is reduced further. Products according to the invention can be used in industry of foods, chemistry, medicine, and light industry, and particularly suitable for using as nutritional supplements, curing agent and buffers for food industry.

Description

1. Technical field [0001] The invention belongs to the technical field of preparing sodium gluconate, in particular to a preparation method of sodium gluconate. 2. Background technology [0002] Sodium gluconate, also known as sodium pentahydroxycaproate, is a weak organic acid salt, white or light yellow crystalline powder, easily soluble in water, slightly soluble in alcohol, insoluble in ether, non-toxic, and is an excellent flavoring agent. It also has the effect of masking bitterness and odor, and is an excellent pH buffer for food processing. The sodium in sodium gluconate plays an important role in maintaining the external osmotic pressure and capacity of cells, regulating the acid-base balance in the body, and exerting normal neuromuscular functions, which can effectively prevent the occurrence of hyponatremia syndrome. Sodium gluconate is widely used in water treatment, electroplating, metal and non-metal surface cleaning and cement production because of its good t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C12P7/58C07C59/105C07C51/41C07C51/47
Inventor 金挺周小华张桂罗云芳
Owner CHONGQING UNIV
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