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A kind of method of producing sodium gluconate

A technology of sodium gluconate and glucose solution, which is applied in the direction of chemical instruments and methods, carboxylate preparation, carboxylate preparation, etc. It can solve the problems of complex production process, catalyst wear, easy loss, etc., and achieve high product quality and responsiveness. The effect of fast speed and no waste discharge

Inactive Publication Date: 2016-01-20
NORTHWEST UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The heterogeneous catalytic oxidation method is the most advanced method, and the product quality is good and the purity is high, but the main disadvantage of this technology is that the reaction conditions are strict, and the precious metal catalyst is easily polluted, deactivated, and easily lost.
[0004] Chinese patent CN87100011A discloses an improved catalyst, which replaces part of the precious metal platinum or palladium with lead, reduces the content of the precious metal in the catalyst, and reduces the cost, but the pollution and deactivation of the catalyst and the suspended gas-liquid-solid injection reaction method seriously wear the catalyst and aggravate the loss of the catalyst.
[0005] Chinese patent CN1807399A discloses an improved method, which can reduce the amount of precious metal catalyst, but the homogeneous catalytic oxidation is added in the process, which makes the production process complicated and the fundamental problem of the catalyst has not been solved
[0006] CN102701952A also discloses a catalyst improvement scheme. Bismuth is introduced into the palladium catalyst as a cocatalyst to improve catalyst performance, but it still cannot get rid of the disadvantages of deactivation and loss
The use of microwaves to accelerate chemical reactions is currently limited by equipment and safety in industrial applications, and it is difficult to control industrial production operations.
And the reported yield is not high

Method used

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  • A kind of method of producing sodium gluconate
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  • A kind of method of producing sodium gluconate

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] Attached figure 1 process shown. Fixed-bed reactor 1 has an inner diameter of 40 cm and a height of 300 cm. The granular activated carbon is columnar 2.5 cm × 4 cm, and packed on the orifice plate in the reactor 1 with a packing height of 250 cm. Add 50 kilograms of glucose and 200 kilograms of water in the middle tank 4, dissolve and heat to 40 degrees Celsius, add NaOH solution to adjust the pH value of 9 to 10, open the circulation pump 5 and the ozone machine 3, and adjust the flow rate of the circulation pump 5 to 3 cubic meters / Hour, ozone concentration 15 grams / cubic meter, flow rate 100 cubic meters / hour, reaction 3 hours, glucose conversion rate 97%, solution is colorless and transparent.

Embodiment 2

[0039] Using the same device process as in Example 1, the raw material is the crystallization mother liquor produced by 300 kg of glucose, containing sugar > 40%. First, filter to remove mechanical impurities, add 100 kg of water to dilute to a sugar content of <30%, and reduce the viscosity of the sugar liquid. Then carry out oxidation reaction: temperature 45 degrees centigrade, liquid phase circulation volume 4 cubic meters per hour, ozone concentration 10 grams per cubic meter, flow rate 150 cubic meters per hour. After reacting for 5 hours, the conversion rate of glucose was 95%, and the product was a light yellow transparent solution.

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Abstract

The invention relates to a method for producing sodium gluconate. The method uses glucose solution or the mother liquor for producing crystallized glucose as a raw material, uses activated carbon as a catalyst, and produces sodium gluconate through ozone oxidation in a gas-liquid-solid three-phase reactor. . Compared with the traditional precious metal catalyst, the cost of the catalyst of the present invention is greatly reduced and will not be deactivated; the ozone oxidation reaction speed is fast and the efficiency is high; because there is no catalyst pollution, the glucose crystallization mother liquor can be used as a raw material to produce sodium gluconate, the product quality is high, and resources are saved Improve efficiency. There is no waste discharge during the production process.

Description

technical field [0001] The present invention relates to a kind of method of producing sodium gluconate. Background technique [0002] Sodium gluconate is a polyhydroxy organic weak acid salt, white or light yellow crystalline powder, easily soluble in water, slightly soluble in alcohol, insoluble in ether, non-toxic. Sodium gluconate has a very strong chelating ability with metal ions, can form stable complexes, and is less affected by temperature, and is widely used in water quality treatment agents and stabilizers, electroplating solutions, corrosion and scale inhibitors, in addition, Sodium gluconate is widely used in the construction industry as a retarding additive for cement. [0003] In the prior art, the production methods of sodium gluconate include: fermentation method, homogeneous oxidation method, electrolytic oxidation method and heterogeneous catalytic oxidation method. The heterogeneous catalytic oxidation method is the most advanced method, and the product ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C07C59/105C07C51/41C07C51/34
CPCC07C51/34C07C51/412C07C59/105
Inventor 姚瑞清黎四霞周博
Owner NORTHWEST UNIV